./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.brp2.3.prop1-back-serstep.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.brp2.3.prop1-back-serstep.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8 --witnessprinter.witness.filename witness.graphml --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 64bit --witnessprinter.graph.data.programhash f6bdc2f6e75d43dda9be4265196336dc2c5312044762711009cb81291d8645ff --- 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-e04fb08 [2022-11-16 11:58:13,559 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:58:13,562 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:58:13,593 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:58:13,593 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:58:13,595 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:58:13,596 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:58:13,598 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:58:13,601 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:58:13,602 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:58:13,603 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:58:13,605 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:58:13,605 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:58:13,606 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:58:13,608 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:58:13,610 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:58:13,611 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:58:13,612 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:58:13,614 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:58:13,617 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:58:13,619 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:58:13,624 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:58:13,625 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:58:13,627 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:58:13,631 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:58:13,632 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:58:13,632 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:58:13,633 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:58:13,634 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:58:13,645 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:58:13,645 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:58:13,647 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:58:13,649 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:58:13,654 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:58:13,656 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:58:13,656 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:58:13,657 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:58:13,657 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:58:13,658 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:58:13,659 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:58:13,659 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:58:13,662 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-11-16 11:58:13,710 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:58:13,711 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:58:13,711 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:58:13,711 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:58:13,712 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:58:13,712 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:58:13,713 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:58:13,713 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:58:13,713 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:58:13,714 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:58:13,714 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:58:13,719 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:58:13,720 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 11:58:13,720 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:58:13,720 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 11:58:13,720 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 11:58:13,721 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:58:13,721 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 11:58:13,721 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:58:13,721 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:58:13,721 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:58:13,722 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:58:13,722 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:58:13,723 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:58:13,723 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 11:58:13,723 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:58:13,723 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:58:13,724 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 11:58:13,725 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 11:58:13,725 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 11:58:13,725 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f6bdc2f6e75d43dda9be4265196336dc2c5312044762711009cb81291d8645ff [2022-11-16 11:58:14,069 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:58:14,096 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:58:14,099 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:58:14,101 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:58:14,102 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:58:14,103 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.brp2.3.prop1-back-serstep.c [2022-11-16 11:58:14,179 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/data/b9e8aaf2d/a9d150f3d9b04d21aeb154d90399c01a/FLAG5c787a74a [2022-11-16 11:58:14,960 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:58:14,961 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.brp2.3.prop1-back-serstep.c [2022-11-16 11:58:14,988 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/data/b9e8aaf2d/a9d150f3d9b04d21aeb154d90399c01a/FLAG5c787a74a [2022-11-16 11:58:15,061 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/data/b9e8aaf2d/a9d150f3d9b04d21aeb154d90399c01a [2022-11-16 11:58:15,064 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:58:15,066 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:58:15,068 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:58:15,068 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:58:15,072 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:58:15,073 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:58:15" (1/1) ... [2022-11-16 11:58:15,076 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2849f511 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:58:15, skipping insertion in model container [2022-11-16 11:58:15,076 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:58:15" (1/1) ... [2022-11-16 11:58:15,086 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:58:15,203 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:58:15,525 WARN L229 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_5db07bf0-92bd-4d57-a014-806ac5deda1e/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.brp2.3.prop1-back-serstep.c[1014,1027] [2022-11-16 11:58:16,206 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:58:16,210 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:58:16,224 WARN L229 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_5db07bf0-92bd-4d57-a014-806ac5deda1e/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.brp2.3.prop1-back-serstep.c[1014,1027] [2022-11-16 11:58:16,572 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:58:16,587 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:58:16,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:58:16 WrapperNode [2022-11-16 11:58:16,589 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:58:16,591 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:58:16,592 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:58:16,592 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:58:16,601 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:58:16" (1/1) ... [2022-11-16 11:58:16,693 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:58:16" (1/1) ... [2022-11-16 11:58:17,059 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 5269 [2022-11-16 11:58:17,060 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:58:17,061 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:58:17,061 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:58:17,061 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:58:17,073 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:58:16" (1/1) ... [2022-11-16 11:58:17,073 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:58:16" (1/1) ... [2022-11-16 11:58:17,118 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:58:16" (1/1) ... [2022-11-16 11:58:17,119 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:58:16" (1/1) ... [2022-11-16 11:58:17,368 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:58:16" (1/1) ... [2022-11-16 11:58:17,414 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:58:16" (1/1) ... [2022-11-16 11:58:17,494 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:58:16" (1/1) ... [2022-11-16 11:58:17,518 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:58:16" (1/1) ... [2022-11-16 11:58:17,640 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:58:17,658 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:58:17,659 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:58:17,659 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:58:17,660 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:58:16" (1/1) ... [2022-11-16 11:58:17,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:58:17,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:58:17,736 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:58:17,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:58:17,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:58:17,809 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:58:18,654 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:58:18,657 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:58:25,010 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:58:25,029 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:58:25,039 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-16 11:58:25,043 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:58:25 BoogieIcfgContainer [2022-11-16 11:58:25,045 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:58:25,047 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:58:25,049 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:58:25,054 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:58:25,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:58:15" (1/3) ... [2022-11-16 11:58:25,055 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a213260 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:58:25, skipping insertion in model container [2022-11-16 11:58:25,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:58:16" (2/3) ... [2022-11-16 11:58:25,056 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a213260 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:58:25, skipping insertion in model container [2022-11-16 11:58:25,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:58:25" (3/3) ... [2022-11-16 11:58:25,058 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.brp2.3.prop1-back-serstep.c [2022-11-16 11:58:25,082 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:58:25,082 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 11:58:25,206 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:58:25,219 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=LoopsAndPotentialCycles, 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;@2244ed9a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:58:25,220 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 11:58:25,233 INFO L276 IsEmpty]: Start isEmpty. Operand has 902 states, 900 states have (on average 1.6644444444444444) internal successors, (1498), 901 states have internal predecessors, (1498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:58:25,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-11-16 11:58:25,269 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:58:25,270 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:58:25,271 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:58:25,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:58:25,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1976997793, now seen corresponding path program 1 times [2022-11-16 11:58:25,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:58:25,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785140384] [2022-11-16 11:58:25,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:58:25,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:58:25,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:58:27,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:58:27,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:58:27,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785140384] [2022-11-16 11:58:27,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785140384] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:58:27,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:58:27,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:58:27,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545258810] [2022-11-16 11:58:27,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:58:27,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:58:27,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:58:27,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:58:27,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:58:27,454 INFO L87 Difference]: Start difference. First operand has 902 states, 900 states have (on average 1.6644444444444444) internal successors, (1498), 901 states have internal predecessors, (1498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 45.25) internal successors, (181), 4 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:58:29,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:58:29,493 INFO L93 Difference]: Finished difference Result 2956 states and 4922 transitions. [2022-11-16 11:58:29,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:58:29,496 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.25) internal successors, (181), 4 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 181 [2022-11-16 11:58:29,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:58:29,545 INFO L225 Difference]: With dead ends: 2956 [2022-11-16 11:58:29,558 INFO L226 Difference]: Without dead ends: 2056 [2022-11-16 11:58:29,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:58:29,571 INFO L413 NwaCegarLoop]: 1930 mSDtfsCounter, 4452 mSDsluCounter, 2363 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4452 SdHoareTripleChecker+Valid, 4293 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:58:29,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4452 Valid, 4293 Invalid, 18 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-16 11:58:29,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2056 states. [2022-11-16 11:58:29,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2056 to 900. [2022-11-16 11:58:29,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 900 states, 899 states have (on average 1.6618464961067854) internal successors, (1494), 899 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:58:29,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 1494 transitions. [2022-11-16 11:58:29,804 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 1494 transitions. Word has length 181 [2022-11-16 11:58:29,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:58:29,809 INFO L495 AbstractCegarLoop]: Abstraction has 900 states and 1494 transitions. [2022-11-16 11:58:29,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.25) internal successors, (181), 4 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:58:29,811 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 1494 transitions. [2022-11-16 11:58:29,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-16 11:58:29,822 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:58:29,823 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:58:29,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 11:58:29,823 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:58:29,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:58:29,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1159115443, now seen corresponding path program 1 times [2022-11-16 11:58:29,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:58:29,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274679368] [2022-11-16 11:58:29,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:58:29,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:58:29,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:58:31,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:58:31,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:58:31,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274679368] [2022-11-16 11:58:31,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274679368] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:58:31,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:58:31,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:58:31,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476075134] [2022-11-16 11:58:31,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:58:31,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:58:31,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:58:31,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:58:31,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:58:31,322 INFO L87 Difference]: Start difference. First operand 900 states and 1494 transitions. Second operand has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:58:33,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:58:33,297 INFO L93 Difference]: Finished difference Result 3581 states and 5954 transitions. [2022-11-16 11:58:33,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:58:33,304 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 182 [2022-11-16 11:58:33,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:58:33,318 INFO L225 Difference]: With dead ends: 3581 [2022-11-16 11:58:33,319 INFO L226 Difference]: Without dead ends: 2683 [2022-11-16 11:58:33,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:58:33,331 INFO L413 NwaCegarLoop]: 1924 mSDtfsCounter, 3841 mSDsluCounter, 2972 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3841 SdHoareTripleChecker+Valid, 4896 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:58:33,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3841 Valid, 4896 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-16 11:58:33,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2683 states. [2022-11-16 11:58:33,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2683 to 1163. [2022-11-16 11:58:33,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1163 states, 1162 states have (on average 1.661790017211704) internal successors, (1931), 1162 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:58:33,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1163 states to 1163 states and 1931 transitions. [2022-11-16 11:58:33,399 INFO L78 Accepts]: Start accepts. Automaton has 1163 states and 1931 transitions. Word has length 182 [2022-11-16 11:58:33,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:58:33,402 INFO L495 AbstractCegarLoop]: Abstraction has 1163 states and 1931 transitions. [2022-11-16 11:58:33,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:58:33,403 INFO L276 IsEmpty]: Start isEmpty. Operand 1163 states and 1931 transitions. [2022-11-16 11:58:33,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 780 [2022-11-16 11:58:33,433 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:58:33,434 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:58:33,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 11:58:33,435 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:58:33,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:58:33,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1348710314, now seen corresponding path program 1 times [2022-11-16 11:58:33,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:58:33,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722950495] [2022-11-16 11:58:33,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:58:33,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:58:33,992 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:58:33,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [234623515] [2022-11-16 11:58:33,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:58:33,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:58:33,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:58:33,998 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:58:34,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 11:58:36,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:58:37,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 6546 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 11:58:37,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:58:38,197 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 178 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:58:38,200 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:58:38,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:58:38,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722950495] [2022-11-16 11:58:38,201 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:58:38,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234623515] [2022-11-16 11:58:38,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234623515] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:58:38,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:58:38,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:58:38,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608847063] [2022-11-16 11:58:38,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:58:38,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:58:38,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:58:38,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:58:38,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:58:38,213 INFO L87 Difference]: Start difference. First operand 1163 states and 1931 transitions. Second operand has 5 states, 5 states have (on average 155.8) internal successors, (779), 5 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:58:39,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:58:39,283 INFO L93 Difference]: Finished difference Result 2957 states and 4911 transitions. [2022-11-16 11:58:39,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:58:39,284 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 155.8) internal successors, (779), 5 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 779 [2022-11-16 11:58:39,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:58:39,294 INFO L225 Difference]: With dead ends: 2957 [2022-11-16 11:58:39,295 INFO L226 Difference]: Without dead ends: 2059 [2022-11-16 11:58:39,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 779 GetRequests, 775 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:58:39,301 INFO L413 NwaCegarLoop]: 1758 mSDtfsCounter, 2795 mSDsluCounter, 3075 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2795 SdHoareTripleChecker+Valid, 4833 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:58:39,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2795 Valid, 4833 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-16 11:58:39,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2059 states. [2022-11-16 11:58:39,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2059 to 1166. [2022-11-16 11:58:39,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1166 states, 1165 states have (on average 1.6600858369098712) internal successors, (1934), 1165 states have internal predecessors, (1934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:58:39,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1166 states to 1166 states and 1934 transitions. [2022-11-16 11:58:39,425 INFO L78 Accepts]: Start accepts. Automaton has 1166 states and 1934 transitions. Word has length 779 [2022-11-16 11:58:39,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:58:39,427 INFO L495 AbstractCegarLoop]: Abstraction has 1166 states and 1934 transitions. [2022-11-16 11:58:39,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 155.8) internal successors, (779), 5 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:58:39,428 INFO L276 IsEmpty]: Start isEmpty. Operand 1166 states and 1934 transitions. [2022-11-16 11:58:39,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 781 [2022-11-16 11:58:39,456 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:58:39,457 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:58:39,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 11:58:39,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:58:39,678 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:58:39,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:58:39,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1536636276, now seen corresponding path program 1 times [2022-11-16 11:58:39,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:58:39,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271806489] [2022-11-16 11:58:39,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:58:39,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:58:40,208 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:58:40,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [731076567] [2022-11-16 11:58:40,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:58:40,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:58:40,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:58:40,211 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:58:40,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 11:58:43,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:58:43,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 6549 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 11:58:43,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:58:43,805 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 178 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:58:43,805 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:58:43,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:58:43,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271806489] [2022-11-16 11:58:43,806 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:58:43,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731076567] [2022-11-16 11:58:43,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731076567] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:58:43,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:58:43,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:58:43,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595025134] [2022-11-16 11:58:43,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:58:43,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:58:43,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:58:43,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:58:43,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:58:43,812 INFO L87 Difference]: Start difference. First operand 1166 states and 1934 transitions. Second operand has 6 states, 6 states have (on average 130.0) internal successors, (780), 6 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:58:45,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:58:45,131 INFO L93 Difference]: Finished difference Result 3866 states and 6412 transitions. [2022-11-16 11:58:45,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:58:45,132 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 130.0) internal successors, (780), 6 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 780 [2022-11-16 11:58:45,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:58:45,145 INFO L225 Difference]: With dead ends: 3866 [2022-11-16 11:58:45,146 INFO L226 Difference]: Without dead ends: 2965 [2022-11-16 11:58:45,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 781 GetRequests, 775 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:58:45,150 INFO L413 NwaCegarLoop]: 1772 mSDtfsCounter, 7976 mSDsluCounter, 3090 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7976 SdHoareTripleChecker+Valid, 4862 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:58:45,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7976 Valid, 4862 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-16 11:58:45,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2965 states. [2022-11-16 11:58:45,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2965 to 1168. [2022-11-16 11:58:45,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1168 states, 1167 states have (on average 1.658954584404456) internal successors, (1936), 1167 states have internal predecessors, (1936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:58:45,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 1936 transitions. [2022-11-16 11:58:45,215 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 1936 transitions. Word has length 780 [2022-11-16 11:58:45,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:58:45,217 INFO L495 AbstractCegarLoop]: Abstraction has 1168 states and 1936 transitions. [2022-11-16 11:58:45,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 130.0) internal successors, (780), 6 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:58:45,218 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 1936 transitions. [2022-11-16 11:58:45,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 782 [2022-11-16 11:58:45,255 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:58:45,256 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:58:45,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 11:58:45,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:58:45,483 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:58:45,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:58:45,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1919781266, now seen corresponding path program 1 times [2022-11-16 11:58:45,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:58:45,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261330252] [2022-11-16 11:58:45,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:58:45,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:58:46,134 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:58:46,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1861573865] [2022-11-16 11:58:46,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:58:46,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:58:46,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:58:46,137 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:58:46,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 11:58:49,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:58:49,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 6552 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 11:58:49,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:58:50,500 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 178 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:58:50,504 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:58:50,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:58:50,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261330252] [2022-11-16 11:58:50,505 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:58:50,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861573865] [2022-11-16 11:58:50,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861573865] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:58:50,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:58:50,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:58:50,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168190247] [2022-11-16 11:58:50,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:58:50,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:58:50,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:58:50,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:58:50,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:58:50,515 INFO L87 Difference]: Start difference. First operand 1168 states and 1936 transitions. Second operand has 5 states, 5 states have (on average 156.2) internal successors, (781), 5 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:58:51,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:58:51,445 INFO L93 Difference]: Finished difference Result 2968 states and 4921 transitions. [2022-11-16 11:58:51,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:58:51,447 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 156.2) internal successors, (781), 5 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 781 [2022-11-16 11:58:51,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:58:51,455 INFO L225 Difference]: With dead ends: 2968 [2022-11-16 11:58:51,455 INFO L226 Difference]: Without dead ends: 2065 [2022-11-16 11:58:51,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 781 GetRequests, 777 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:58:51,459 INFO L413 NwaCegarLoop]: 1773 mSDtfsCounter, 3802 mSDsluCounter, 3089 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3802 SdHoareTripleChecker+Valid, 4862 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:58:51,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3802 Valid, 4862 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 11:58:51,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2065 states. [2022-11-16 11:58:51,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2065 to 1169. [2022-11-16 11:58:51,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1169 states, 1168 states have (on average 1.658390410958904) internal successors, (1937), 1168 states have internal predecessors, (1937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:58:51,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1169 states to 1169 states and 1937 transitions. [2022-11-16 11:58:51,503 INFO L78 Accepts]: Start accepts. Automaton has 1169 states and 1937 transitions. Word has length 781 [2022-11-16 11:58:51,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:58:51,504 INFO L495 AbstractCegarLoop]: Abstraction has 1169 states and 1937 transitions. [2022-11-16 11:58:51,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 156.2) internal successors, (781), 5 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:58:51,505 INFO L276 IsEmpty]: Start isEmpty. Operand 1169 states and 1937 transitions. [2022-11-16 11:58:51,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 782 [2022-11-16 11:58:51,514 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:58:51,514 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:58:51,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 11:58:51,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:58:51,731 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:58:51,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:58:51,731 INFO L85 PathProgramCache]: Analyzing trace with hash 317515948, now seen corresponding path program 1 times [2022-11-16 11:58:51,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:58:51,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731337115] [2022-11-16 11:58:51,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:58:51,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:58:52,209 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:58:52,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [427979851] [2022-11-16 11:58:52,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:58:52,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:58:52,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:58:52,215 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:58:52,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 11:58:55,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:58:55,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 6552 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 11:58:55,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:58:55,680 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 178 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:58:55,680 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:58:55,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:58:55,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731337115] [2022-11-16 11:58:55,681 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:58:55,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427979851] [2022-11-16 11:58:55,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427979851] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:58:55,681 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:58:55,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:58:55,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566054159] [2022-11-16 11:58:55,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:58:55,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:58:55,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:58:55,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:58:55,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:58:55,685 INFO L87 Difference]: Start difference. First operand 1169 states and 1937 transitions. Second operand has 6 states, 6 states have (on average 130.16666666666666) internal successors, (781), 6 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:58:56,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:58:56,814 INFO L93 Difference]: Finished difference Result 3878 states and 6424 transitions. [2022-11-16 11:58:56,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:58:56,817 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 130.16666666666666) internal successors, (781), 6 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 781 [2022-11-16 11:58:56,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:58:56,829 INFO L225 Difference]: With dead ends: 3878 [2022-11-16 11:58:56,829 INFO L226 Difference]: Without dead ends: 2974 [2022-11-16 11:58:56,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 782 GetRequests, 776 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:58:56,832 INFO L413 NwaCegarLoop]: 1775 mSDtfsCounter, 9239 mSDsluCounter, 3092 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9239 SdHoareTripleChecker+Valid, 4867 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:58:56,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9239 Valid, 4867 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-16 11:58:56,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2974 states. [2022-11-16 11:58:56,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2974 to 1171. [2022-11-16 11:58:56,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1171 states, 1170 states have (on average 1.6572649572649574) internal successors, (1939), 1170 states have internal predecessors, (1939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:58:56,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1171 states to 1171 states and 1939 transitions. [2022-11-16 11:58:56,882 INFO L78 Accepts]: Start accepts. Automaton has 1171 states and 1939 transitions. Word has length 781 [2022-11-16 11:58:56,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:58:56,883 INFO L495 AbstractCegarLoop]: Abstraction has 1171 states and 1939 transitions. [2022-11-16 11:58:56,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 130.16666666666666) internal successors, (781), 6 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:58:56,884 INFO L276 IsEmpty]: Start isEmpty. Operand 1171 states and 1939 transitions. [2022-11-16 11:58:56,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 783 [2022-11-16 11:58:56,892 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:58:56,893 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:58:56,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 11:58:57,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:58:57,119 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:58:57,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:58:57,120 INFO L85 PathProgramCache]: Analyzing trace with hash -530086716, now seen corresponding path program 1 times [2022-11-16 11:58:57,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:58:57,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432123998] [2022-11-16 11:58:57,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:58:57,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:58:57,517 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:58:57,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1723948004] [2022-11-16 11:58:57,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:58:57,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:58:57,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:58:57,519 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:58:57,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 11:59:00,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:59:00,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 6555 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 11:59:00,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:59:01,668 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 178 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:59:01,668 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:59:01,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:59:01,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432123998] [2022-11-16 11:59:01,669 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:59:01,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723948004] [2022-11-16 11:59:01,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723948004] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:59:01,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:59:01,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:59:01,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410785495] [2022-11-16 11:59:01,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:59:01,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:59:01,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:59:01,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:59:01,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:59:01,677 INFO L87 Difference]: Start difference. First operand 1171 states and 1939 transitions. Second operand has 5 states, 5 states have (on average 156.4) internal successors, (782), 5 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:59:02,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:59:02,621 INFO L93 Difference]: Finished difference Result 2977 states and 4930 transitions. [2022-11-16 11:59:02,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:59:02,623 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 156.4) internal successors, (782), 5 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 782 [2022-11-16 11:59:02,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:59:02,631 INFO L225 Difference]: With dead ends: 2977 [2022-11-16 11:59:02,631 INFO L226 Difference]: Without dead ends: 2071 [2022-11-16 11:59:02,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 782 GetRequests, 778 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:59:02,637 INFO L413 NwaCegarLoop]: 1778 mSDtfsCounter, 2776 mSDsluCounter, 3093 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2776 SdHoareTripleChecker+Valid, 4871 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:59:02,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2776 Valid, 4871 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-16 11:59:02,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2071 states. [2022-11-16 11:59:02,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2071 to 1172. [2022-11-16 11:59:02,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1172 states, 1171 states have (on average 1.6567036720751493) internal successors, (1940), 1171 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:59:02,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1172 states to 1172 states and 1940 transitions. [2022-11-16 11:59:02,676 INFO L78 Accepts]: Start accepts. Automaton has 1172 states and 1940 transitions. Word has length 782 [2022-11-16 11:59:02,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:59:02,677 INFO L495 AbstractCegarLoop]: Abstraction has 1172 states and 1940 transitions. [2022-11-16 11:59:02,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 156.4) internal successors, (782), 5 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:59:02,678 INFO L276 IsEmpty]: Start isEmpty. Operand 1172 states and 1940 transitions. [2022-11-16 11:59:02,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 783 [2022-11-16 11:59:02,686 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:59:02,687 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:59:02,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 11:59:02,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:59:02,905 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:59:02,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:59:02,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1310457218, now seen corresponding path program 1 times [2022-11-16 11:59:02,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:59:02,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031719902] [2022-11-16 11:59:02,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:59:02,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:59:03,361 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:59:03,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2064760679] [2022-11-16 11:59:03,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:59:03,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:59:03,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:59:03,363 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:59:03,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 11:59:06,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:59:06,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 6555 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 11:59:06,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:59:07,282 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 178 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:59:07,282 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:59:07,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:59:07,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031719902] [2022-11-16 11:59:07,283 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:59:07,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064760679] [2022-11-16 11:59:07,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064760679] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:59:07,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:59:07,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:59:07,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153959884] [2022-11-16 11:59:07,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:59:07,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:59:07,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:59:07,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:59:07,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:59:07,288 INFO L87 Difference]: Start difference. First operand 1172 states and 1940 transitions. Second operand has 6 states, 6 states have (on average 130.33333333333334) internal successors, (782), 6 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:59:08,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:59:08,497 INFO L93 Difference]: Finished difference Result 3890 states and 6436 transitions. [2022-11-16 11:59:08,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:59:08,498 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 130.33333333333334) internal successors, (782), 6 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 782 [2022-11-16 11:59:08,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:59:08,508 INFO L225 Difference]: With dead ends: 3890 [2022-11-16 11:59:08,508 INFO L226 Difference]: Without dead ends: 2983 [2022-11-16 11:59:08,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 783 GetRequests, 777 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:59:08,512 INFO L413 NwaCegarLoop]: 1797 mSDtfsCounter, 7876 mSDsluCounter, 3115 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7876 SdHoareTripleChecker+Valid, 4912 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:59:08,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7876 Valid, 4912 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 605 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-16 11:59:08,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2983 states. [2022-11-16 11:59:08,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2983 to 1174. [2022-11-16 11:59:08,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1174 states, 1173 states have (on average 1.6555839727195225) internal successors, (1942), 1173 states have internal predecessors, (1942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:59:08,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1174 states to 1174 states and 1942 transitions. [2022-11-16 11:59:08,566 INFO L78 Accepts]: Start accepts. Automaton has 1174 states and 1942 transitions. Word has length 782 [2022-11-16 11:59:08,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:59:08,567 INFO L495 AbstractCegarLoop]: Abstraction has 1174 states and 1942 transitions. [2022-11-16 11:59:08,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 130.33333333333334) internal successors, (782), 6 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:59:08,568 INFO L276 IsEmpty]: Start isEmpty. Operand 1174 states and 1942 transitions. [2022-11-16 11:59:08,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 784 [2022-11-16 11:59:08,582 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:59:08,583 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:59:08,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 11:59:08,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-16 11:59:08,799 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:59:08,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:59:08,800 INFO L85 PathProgramCache]: Analyzing trace with hash 390136868, now seen corresponding path program 1 times [2022-11-16 11:59:08,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:59:08,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573120693] [2022-11-16 11:59:08,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:59:08,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:59:09,315 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:59:09,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1529314515] [2022-11-16 11:59:09,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:59:09,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:59:09,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:59:09,318 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:59:09,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 11:59:12,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:59:12,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 6558 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 11:59:12,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:59:13,647 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 178 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:59:13,648 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:59:13,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:59:13,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573120693] [2022-11-16 11:59:13,648 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:59:13,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529314515] [2022-11-16 11:59:13,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529314515] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:59:13,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:59:13,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:59:13,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132197062] [2022-11-16 11:59:13,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:59:13,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:59:13,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:59:13,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:59:13,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:59:13,653 INFO L87 Difference]: Start difference. First operand 1174 states and 1942 transitions. Second operand has 5 states, 5 states have (on average 156.6) internal successors, (783), 5 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:59:14,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:59:14,604 INFO L93 Difference]: Finished difference Result 2986 states and 4939 transitions. [2022-11-16 11:59:14,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:59:14,606 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 156.6) internal successors, (783), 5 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 783 [2022-11-16 11:59:14,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:59:14,612 INFO L225 Difference]: With dead ends: 2986 [2022-11-16 11:59:14,612 INFO L226 Difference]: Without dead ends: 2077 [2022-11-16 11:59:14,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 783 GetRequests, 779 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:59:14,615 INFO L413 NwaCegarLoop]: 1798 mSDtfsCounter, 3730 mSDsluCounter, 3114 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3730 SdHoareTripleChecker+Valid, 4912 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:59:14,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3730 Valid, 4912 Invalid, 594 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 11:59:14,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2077 states. [2022-11-16 11:59:14,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2077 to 1175. [2022-11-16 11:59:14,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1175 states, 1174 states have (on average 1.6550255536626917) internal successors, (1943), 1174 states have internal predecessors, (1943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:59:14,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1175 states to 1175 states and 1943 transitions. [2022-11-16 11:59:14,648 INFO L78 Accepts]: Start accepts. Automaton has 1175 states and 1943 transitions. Word has length 783 [2022-11-16 11:59:14,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:59:14,649 INFO L495 AbstractCegarLoop]: Abstraction has 1175 states and 1943 transitions. [2022-11-16 11:59:14,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 156.6) internal successors, (783), 5 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:59:14,650 INFO L276 IsEmpty]: Start isEmpty. Operand 1175 states and 1943 transitions. [2022-11-16 11:59:14,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 784 [2022-11-16 11:59:14,657 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:59:14,658 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:59:14,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 11:59:14,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:59:14,875 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:59:14,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:59:14,876 INFO L85 PathProgramCache]: Analyzing trace with hash 758153570, now seen corresponding path program 1 times [2022-11-16 11:59:14,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:59:14,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478469580] [2022-11-16 11:59:14,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:59:14,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:59:15,262 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:59:15,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [53700522] [2022-11-16 11:59:15,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:59:15,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:59:15,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:59:15,265 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:59:15,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 11:59:18,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:59:18,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 6558 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 11:59:18,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:59:18,875 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 178 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:59:18,876 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:59:18,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:59:18,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478469580] [2022-11-16 11:59:18,876 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:59:18,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53700522] [2022-11-16 11:59:18,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53700522] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:59:18,877 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:59:18,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:59:18,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027885404] [2022-11-16 11:59:18,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:59:18,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:59:18,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:59:18,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:59:18,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:59:18,880 INFO L87 Difference]: Start difference. First operand 1175 states and 1943 transitions. Second operand has 6 states, 6 states have (on average 130.5) internal successors, (783), 6 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:59:20,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:59:20,094 INFO L93 Difference]: Finished difference Result 3902 states and 6448 transitions. [2022-11-16 11:59:20,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:59:20,095 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 130.5) internal successors, (783), 6 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 783 [2022-11-16 11:59:20,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:59:20,105 INFO L225 Difference]: With dead ends: 3902 [2022-11-16 11:59:20,106 INFO L226 Difference]: Without dead ends: 2992 [2022-11-16 11:59:20,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 784 GetRequests, 778 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:59:20,108 INFO L413 NwaCegarLoop]: 2636 mSDtfsCounter, 7219 mSDsluCounter, 3952 mSDsCounter, 0 mSdLazyCounter, 860 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7219 SdHoareTripleChecker+Valid, 6588 SdHoareTripleChecker+Invalid, 862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:59:20,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7219 Valid, 6588 Invalid, 862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 860 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-16 11:59:20,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2992 states. [2022-11-16 11:59:20,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2992 to 1177. [2022-11-16 11:59:20,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1177 states, 1176 states have (on average 1.6539115646258504) internal successors, (1945), 1176 states have internal predecessors, (1945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:59:20,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1177 states to 1177 states and 1945 transitions. [2022-11-16 11:59:20,147 INFO L78 Accepts]: Start accepts. Automaton has 1177 states and 1945 transitions. Word has length 783 [2022-11-16 11:59:20,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:59:20,148 INFO L495 AbstractCegarLoop]: Abstraction has 1177 states and 1945 transitions. [2022-11-16 11:59:20,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 130.5) internal successors, (783), 6 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:59:20,149 INFO L276 IsEmpty]: Start isEmpty. Operand 1177 states and 1945 transitions. [2022-11-16 11:59:20,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 785 [2022-11-16 11:59:20,157 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:59:20,158 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:59:20,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 11:59:20,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 11:59:20,383 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:59:20,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:59:20,384 INFO L85 PathProgramCache]: Analyzing trace with hash -2068143752, now seen corresponding path program 1 times [2022-11-16 11:59:20,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:59:20,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102919516] [2022-11-16 11:59:20,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:59:20,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:59:20,784 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:59:20,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [327144895] [2022-11-16 11:59:20,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:59:20,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:59:20,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:59:20,786 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:59:20,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 11:59:24,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:59:24,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 6561 conjuncts, 95 conjunts are in the unsatisfiable core [2022-11-16 11:59:24,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:59:30,215 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 2 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:59:30,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:59:36,679 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2022-11-16 11:59:36,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:59:36,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102919516] [2022-11-16 11:59:36,680 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:59:36,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327144895] [2022-11-16 11:59:36,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327144895] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:59:36,681 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:59:36,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2022-11-16 11:59:36,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628022768] [2022-11-16 11:59:36,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:59:36,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:59:36,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:59:36,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:59:36,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:59:36,685 INFO L87 Difference]: Start difference. First operand 1177 states and 1945 transitions. Second operand has 5 states, 5 states have (on average 122.2) internal successors, (611), 5 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:59:38,826 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 11:59:45,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:59:45,430 INFO L93 Difference]: Finished difference Result 6143 states and 10004 transitions. [2022-11-16 11:59:45,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:59:45,430 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 122.2) internal successors, (611), 5 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 784 [2022-11-16 11:59:45,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:59:45,450 INFO L225 Difference]: With dead ends: 6143 [2022-11-16 11:59:45,450 INFO L226 Difference]: Without dead ends: 5231 [2022-11-16 11:59:45,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1570 GetRequests, 1558 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:59:45,454 INFO L413 NwaCegarLoop]: 1600 mSDtfsCounter, 8412 mSDsluCounter, 2645 mSDsCounter, 0 mSdLazyCounter, 4387 mSolverCounterSat, 449 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8412 SdHoareTripleChecker+Valid, 4245 SdHoareTripleChecker+Invalid, 4836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 449 IncrementalHoareTripleChecker+Valid, 4387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:59:45,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8412 Valid, 4245 Invalid, 4836 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [449 Valid, 4387 Invalid, 0 Unknown, 0 Unchecked, 8.4s Time] [2022-11-16 11:59:45,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5231 states. [2022-11-16 11:59:45,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5231 to 1180. [2022-11-16 11:59:45,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 1.6530958439355385) internal successors, (1949), 1179 states have internal predecessors, (1949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:59:45,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 1949 transitions. [2022-11-16 11:59:45,506 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 1949 transitions. Word has length 784 [2022-11-16 11:59:45,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:59:45,508 INFO L495 AbstractCegarLoop]: Abstraction has 1180 states and 1949 transitions. [2022-11-16 11:59:45,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 122.2) internal successors, (611), 5 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:59:45,509 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 1949 transitions. [2022-11-16 11:59:45,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 785 [2022-11-16 11:59:45,517 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:59:45,518 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:59:45,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 11:59:45,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-16 11:59:45,731 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:59:45,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:59:45,732 INFO L85 PathProgramCache]: Analyzing trace with hash -2068084170, now seen corresponding path program 1 times [2022-11-16 11:59:45,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:59:45,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755065332] [2022-11-16 11:59:45,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:59:45,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:59:46,131 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:59:46,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1738748761] [2022-11-16 11:59:46,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:59:46,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:59:46,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:59:46,133 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:59:46,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 11:59:49,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:59:49,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 6561 conjuncts, 91 conjunts are in the unsatisfiable core [2022-11-16 11:59:49,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:59:52,616 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 2 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:59:52,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:59:55,888 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2022-11-16 11:59:55,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:59:55,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755065332] [2022-11-16 11:59:55,889 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:59:55,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738748761] [2022-11-16 11:59:55,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738748761] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:59:55,890 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:59:55,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 9 [2022-11-16 11:59:55,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778800001] [2022-11-16 11:59:55,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:59:55,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:59:55,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:59:55,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:59:55,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:59:55,894 INFO L87 Difference]: Start difference. First operand 1180 states and 1949 transitions. Second operand has 4 states, 4 states have (on average 152.75) internal successors, (611), 4 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:59:57,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:59:57,505 INFO L93 Difference]: Finished difference Result 3904 states and 6450 transitions. [2022-11-16 11:59:57,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:59:57,506 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 152.75) internal successors, (611), 4 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 784 [2022-11-16 11:59:57,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:59:57,515 INFO L225 Difference]: With dead ends: 3904 [2022-11-16 11:59:57,515 INFO L226 Difference]: Without dead ends: 2989 [2022-11-16 11:59:57,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1568 GetRequests, 1560 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:59:57,518 INFO L413 NwaCegarLoop]: 1924 mSDtfsCounter, 4442 mSDsluCounter, 3399 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4442 SdHoareTripleChecker+Valid, 5323 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:59:57,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4442 Valid, 5323 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-16 11:59:57,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2989 states. [2022-11-16 11:59:57,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2989 to 1177. [2022-11-16 11:59:57,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1177 states, 1176 states have (on average 1.6539115646258504) internal successors, (1945), 1176 states have internal predecessors, (1945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:59:57,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1177 states to 1177 states and 1945 transitions. [2022-11-16 11:59:57,556 INFO L78 Accepts]: Start accepts. Automaton has 1177 states and 1945 transitions. Word has length 784 [2022-11-16 11:59:57,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:59:57,618 INFO L495 AbstractCegarLoop]: Abstraction has 1177 states and 1945 transitions. [2022-11-16 11:59:57,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 152.75) internal successors, (611), 4 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:59:57,619 INFO L276 IsEmpty]: Start isEmpty. Operand 1177 states and 1945 transitions. [2022-11-16 11:59:57,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 786 [2022-11-16 11:59:57,633 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:59:57,634 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:59:57,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 11:59:57,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-16 11:59:57,847 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:59:57,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:59:57,850 INFO L85 PathProgramCache]: Analyzing trace with hash 101621718, now seen corresponding path program 1 times [2022-11-16 11:59:57,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:59:57,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28984427] [2022-11-16 11:59:57,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:59:57,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:59:58,238 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:59:58,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [836574574] [2022-11-16 11:59:58,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:59:58,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:59:58,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:59:58,241 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:59:58,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 12:00:01,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:00:01,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 6564 conjuncts, 99 conjunts are in the unsatisfiable core [2022-11-16 12:00:01,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:00:06,915 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 2 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:00:06,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:00:18,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:00:18,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28984427] [2022-11-16 12:00:18,464 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:00:18,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836574574] [2022-11-16 12:00:18,464 WARN L319 FreeRefinementEngine]: Global settings require throwing the following exception [2022-11-16 12:00:18,499 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-16 12:00:18,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-16 12:00:18,665 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Maybe an infinite loop at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:130) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:345) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:188) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:65) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:295) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:281) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:90) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:238) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:399) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:271) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:342) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-16 12:00:18,669 INFO L158 Benchmark]: Toolchain (without parser) took 123603.52ms. Allocated memory was 102.8MB in the beginning and 1.7GB in the end (delta: 1.6GB). Free memory was 61.0MB in the beginning and 807.7MB in the end (delta: -746.7MB). Peak memory consumption was 1.1GB. Max. memory is 16.1GB. [2022-11-16 12:00:18,669 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 102.8MB. Free memory is still 82.1MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 12:00:18,670 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1522.41ms. Allocated memory was 102.8MB in the beginning and 130.0MB in the end (delta: 27.3MB). Free memory was 60.8MB in the beginning and 82.9MB in the end (delta: -22.1MB). Peak memory consumption was 39.0MB. Max. memory is 16.1GB. [2022-11-16 12:00:18,670 INFO L158 Benchmark]: Boogie Procedure Inliner took 469.20ms. Allocated memory is still 130.0MB. Free memory was 82.9MB in the beginning and 55.2MB in the end (delta: 27.7MB). Peak memory consumption was 46.3MB. Max. memory is 16.1GB. [2022-11-16 12:00:18,670 INFO L158 Benchmark]: Boogie Preprocessor took 583.12ms. Allocated memory is still 130.0MB. Free memory was 55.2MB in the beginning and 45.9MB in the end (delta: 9.3MB). Peak memory consumption was 20.8MB. Max. memory is 16.1GB. [2022-11-16 12:00:18,671 INFO L158 Benchmark]: RCFGBuilder took 7386.64ms. Allocated memory was 130.0MB in the beginning and 457.2MB in the end (delta: 327.2MB). Free memory was 45.8MB in the beginning and 248.5MB in the end (delta: -202.7MB). Peak memory consumption was 257.4MB. Max. memory is 16.1GB. [2022-11-16 12:00:18,671 INFO L158 Benchmark]: TraceAbstraction took 113621.27ms. Allocated memory was 457.2MB in the beginning and 1.7GB in the end (delta: 1.2GB). Free memory was 247.4MB in the beginning and 807.7MB in the end (delta: -560.3MB). Peak memory consumption was 911.3MB. Max. memory is 16.1GB. [2022-11-16 12:00:18,673 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 102.8MB. Free memory is still 82.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1522.41ms. Allocated memory was 102.8MB in the beginning and 130.0MB in the end (delta: 27.3MB). Free memory was 60.8MB in the beginning and 82.9MB in the end (delta: -22.1MB). Peak memory consumption was 39.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 469.20ms. Allocated memory is still 130.0MB. Free memory was 82.9MB in the beginning and 55.2MB in the end (delta: 27.7MB). Peak memory consumption was 46.3MB. Max. memory is 16.1GB. * Boogie Preprocessor took 583.12ms. Allocated memory is still 130.0MB. Free memory was 55.2MB in the beginning and 45.9MB in the end (delta: 9.3MB). Peak memory consumption was 20.8MB. Max. memory is 16.1GB. * RCFGBuilder took 7386.64ms. Allocated memory was 130.0MB in the beginning and 457.2MB in the end (delta: 327.2MB). Free memory was 45.8MB in the beginning and 248.5MB in the end (delta: -202.7MB). Peak memory consumption was 257.4MB. Max. memory is 16.1GB. * TraceAbstraction took 113621.27ms. Allocated memory was 457.2MB in the beginning and 1.7GB in the end (delta: 1.2GB). Free memory was 247.4MB in the beginning and 807.7MB in the end (delta: -560.3MB). Peak memory consumption was 911.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Maybe an infinite loop de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Maybe an infinite loop: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:130) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-11-16 12:00:18,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 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-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.brp2.3.prop1-back-serstep.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-64bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8 --witnessprinter.witness.filename witness.graphml --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 64bit --witnessprinter.graph.data.programhash f6bdc2f6e75d43dda9be4265196336dc2c5312044762711009cb81291d8645ff --- 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-e04fb08 [2022-11-16 12:00:21,586 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:00:21,590 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:00:21,626 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:00:21,626 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:00:21,628 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:00:21,630 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:00:21,632 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:00:21,634 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:00:21,635 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:00:21,637 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:00:21,638 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:00:21,639 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:00:21,640 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:00:21,641 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:00:21,643 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:00:21,644 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:00:21,645 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:00:21,648 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:00:21,650 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:00:21,652 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:00:21,654 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:00:21,656 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:00:21,657 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:00:21,662 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:00:21,662 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:00:21,663 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:00:21,664 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:00:21,665 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:00:21,666 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:00:21,667 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:00:21,668 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:00:21,669 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:00:21,670 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:00:21,672 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:00:21,672 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:00:21,673 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:00:21,674 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:00:21,674 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:00:21,675 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:00:21,676 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:00:21,677 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-64bit-Automizer_Bitvector.epf [2022-11-16 12:00:21,722 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:00:21,723 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:00:21,723 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:00:21,724 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:00:21,725 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:00:21,725 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:00:21,726 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:00:21,726 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:00:21,727 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:00:21,727 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:00:21,727 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:00:21,728 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 12:00:21,728 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:00:21,728 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 12:00:21,728 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 12:00:21,729 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-16 12:00:21,729 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-16 12:00:21,729 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 12:00:21,730 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:00:21,730 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 12:00:21,730 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:00:21,731 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:00:21,731 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:00:21,731 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:00:21,732 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:00:21,732 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:00:21,732 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 12:00:21,732 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-16 12:00:21,733 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-16 12:00:21,733 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 12:00:21,733 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 12:00:21,734 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 12:00:21,734 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-16 12:00:21,734 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f6bdc2f6e75d43dda9be4265196336dc2c5312044762711009cb81291d8645ff [2022-11-16 12:00:22,157 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:00:22,186 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:00:22,190 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:00:22,191 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:00:22,194 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:00:22,196 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.brp2.3.prop1-back-serstep.c [2022-11-16 12:00:22,290 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/data/0ce816b16/69082536561240c4aef99da9f6a8d98a/FLAG0a149bf1c [2022-11-16 12:00:23,242 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:00:23,246 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.brp2.3.prop1-back-serstep.c [2022-11-16 12:00:23,281 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/data/0ce816b16/69082536561240c4aef99da9f6a8d98a/FLAG0a149bf1c [2022-11-16 12:00:23,761 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/data/0ce816b16/69082536561240c4aef99da9f6a8d98a [2022-11-16 12:00:23,765 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:00:23,767 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:00:23,768 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:00:23,768 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:00:23,773 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:00:23,774 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:00:23" (1/1) ... [2022-11-16 12:00:23,775 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ce5bc42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:00:23, skipping insertion in model container [2022-11-16 12:00:23,776 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:00:23" (1/1) ... [2022-11-16 12:00:23,785 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:00:23,873 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:00:24,131 WARN L229 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_5db07bf0-92bd-4d57-a014-806ac5deda1e/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.brp2.3.prop1-back-serstep.c[1014,1027] [2022-11-16 12:00:24,834 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:00:24,842 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:00:24,858 WARN L229 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_5db07bf0-92bd-4d57-a014-806ac5deda1e/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.brp2.3.prop1-back-serstep.c[1014,1027] [2022-11-16 12:00:25,119 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:00:25,137 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:00:25,138 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:00:25 WrapperNode [2022-11-16 12:00:25,138 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:00:25,139 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:00:25,139 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:00:25,140 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:00:25,150 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:00:25" (1/1) ... [2022-11-16 12:00:25,235 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:00:25" (1/1) ... [2022-11-16 12:00:25,407 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 3190 [2022-11-16 12:00:25,407 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:00:25,408 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:00:25,408 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:00:25,409 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:00:25,420 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:00:25" (1/1) ... [2022-11-16 12:00:25,421 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:00:25" (1/1) ... [2022-11-16 12:00:25,439 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:00:25" (1/1) ... [2022-11-16 12:00:25,439 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:00:25" (1/1) ... [2022-11-16 12:00:25,525 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:00:25" (1/1) ... [2022-11-16 12:00:25,592 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:00:25" (1/1) ... [2022-11-16 12:00:25,602 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:00:25" (1/1) ... [2022-11-16 12:00:25,615 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:00:25" (1/1) ... [2022-11-16 12:00:25,635 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:00:25,636 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:00:25,636 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:00:25,636 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:00:25,637 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:00:25" (1/1) ... [2022-11-16 12:00:25,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:00:25,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:00:25,677 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 12:00:25,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 12:00:25,728 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:00:25,729 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:00:26,627 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:00:26,642 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:00:36,414 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:00:36,423 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:00:36,423 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-16 12:00:36,425 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:00:36 BoogieIcfgContainer [2022-11-16 12:00:36,426 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:00:36,428 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 12:00:36,428 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 12:00:36,432 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 12:00:36,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:00:23" (1/3) ... [2022-11-16 12:00:36,433 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63b74548 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:00:36, skipping insertion in model container [2022-11-16 12:00:36,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:00:25" (2/3) ... [2022-11-16 12:00:36,434 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63b74548 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:00:36, skipping insertion in model container [2022-11-16 12:00:36,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:00:36" (3/3) ... [2022-11-16 12:00:36,436 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.brp2.3.prop1-back-serstep.c [2022-11-16 12:00:36,460 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 12:00:36,460 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 12:00:36,535 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:00:36,542 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=LoopsAndPotentialCycles, 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;@dcf430b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:00:36,558 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 12:00:36,563 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:36,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 12:00:36,571 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:00:36,572 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 12:00:36,572 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:00:36,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:00:36,597 INFO L85 PathProgramCache]: Analyzing trace with hash 28698761, now seen corresponding path program 1 times [2022-11-16 12:00:36,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:00:36,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1591291660] [2022-11-16 12:00:36,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:00:36,620 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 [2022-11-16 12:00:36,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:00:36,626 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:00:36,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:00:37,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:00:37,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 12:00:37,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:00:37,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:00:37,790 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:00:37,791 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:00:37,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1591291660] [2022-11-16 12:00:37,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1591291660] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:00:37,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:00:37,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:00:37,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690375605] [2022-11-16 12:00:37,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:00:37,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:00:37,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:00:37,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:00:37,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:00:37,882 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:39,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:00:39,128 INFO L93 Difference]: Finished difference Result 20 states and 30 transitions. [2022-11-16 12:00:39,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:00:39,131 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-16 12:00:39,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:00:39,142 INFO L225 Difference]: With dead ends: 20 [2022-11-16 12:00:39,142 INFO L226 Difference]: Without dead ends: 11 [2022-11-16 12:00:39,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:00:39,159 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 4 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:00:39,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 13 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-16 12:00:39,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-11-16 12:00:39,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 9. [2022-11-16 12:00:39,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:39,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2022-11-16 12:00:39,204 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2022-11-16 12:00:39,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:00:39,204 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2022-11-16 12:00:39,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:39,205 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2022-11-16 12:00:39,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 12:00:39,206 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:00:39,206 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-11-16 12:00:39,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:00:39,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:00:39,423 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:00:39,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:00:39,424 INFO L85 PathProgramCache]: Analyzing trace with hash 271073635, now seen corresponding path program 1 times [2022-11-16 12:00:39,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:00:39,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2047867472] [2022-11-16 12:00:39,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:00:39,431 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 [2022-11-16 12:00:39,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:00:39,432 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:00:39,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:00:41,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:00:41,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 2862 conjuncts, 104 conjunts are in the unsatisfiable core [2022-11-16 12:00:41,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:00:42,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:00:42,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:00:45,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:00:45,363 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:00:45,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2047867472] [2022-11-16 12:00:45,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2047867472] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:00:45,364 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:00:45,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-11-16 12:00:45,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129678585] [2022-11-16 12:00:45,365 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:00:45,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:00:45,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:00:45,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:00:45,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:00:45,369 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:48,357 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:00:48,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:00:48,475 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2022-11-16 12:00:48,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:00:48,476 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-16 12:00:48,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:00:48,477 INFO L225 Difference]: With dead ends: 16 [2022-11-16 12:00:48,477 INFO L226 Difference]: Without dead ends: 14 [2022-11-16 12:00:48,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:00:48,479 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 4 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-16 12:00:48,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 24 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 1 Unknown, 11 Unchecked, 2.9s Time] [2022-11-16 12:00:48,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-16 12:00:48,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 12. [2022-11-16 12:00:48,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:48,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2022-11-16 12:00:48,490 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 8 [2022-11-16 12:00:48,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:00:48,492 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2022-11-16 12:00:48,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:48,494 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2022-11-16 12:00:48,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 12:00:48,495 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:00:48,495 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-16 12:00:48,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:00:48,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:00:48,720 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:00:48,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:00:48,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1020920393, now seen corresponding path program 2 times [2022-11-16 12:00:48,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:00:48,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [101712571] [2022-11-16 12:00:48,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:00:48,728 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 [2022-11-16 12:00:48,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:00:48,730 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:00:48,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5db07bf0-92bd-4d57-a014-806ac5deda1e/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:00:52,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:00:52,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:00:52,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 5336 conjuncts, 294 conjunts are in the unsatisfiable core [2022-11-16 12:00:52,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:01:43,550 WARN L233 SmtUtils]: Spent 39.90s on a formula simplification. DAG size of input: 1405 DAG size of output: 1401 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:01:46,294 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:01:46,294 INFO L328 TraceCheckSpWp]: Computing backward predicates...