./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-90.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-90.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 01664cc77fe0f94aba93d78be3bbb8d6dfcad417fd9d550a500a598597cc5b39 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:51:26,583 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:51:26,699 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 11:51:26,706 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:51:26,707 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:51:26,732 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:51:26,733 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:51:26,734 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:51:26,735 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:51:26,735 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:51:26,736 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:51:26,737 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:51:26,737 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:51:26,738 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:51:26,739 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:51:26,740 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:51:26,740 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:51:26,741 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:51:26,741 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:51:26,742 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:51:26,743 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:51:26,743 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:51:26,744 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:51:26,745 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:51:26,745 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:51:26,746 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:51:26,746 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:51:26,747 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:51:26,748 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:51:26,748 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:51:26,749 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:51:26,749 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:51:26,750 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:51:26,750 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:51:26,751 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:51:26,751 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:51:26,752 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:51:26,752 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:51:26,753 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:51:26,753 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:51:26,753 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:51:26,756 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:51:26,756 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 01664cc77fe0f94aba93d78be3bbb8d6dfcad417fd9d550a500a598597cc5b39 [2023-11-26 11:51:27,070 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:51:27,098 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:51:27,103 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:51:27,105 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:51:27,105 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:51:27,107 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-90.i [2023-11-26 11:51:30,249 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:51:30,657 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:51:30,658 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-90.i [2023-11-26 11:51:30,685 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme/data/722d02758/de1787e0f1344ad9a157d28414dd63b2/FLAG9c50e9bf5 [2023-11-26 11:51:30,705 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme/data/722d02758/de1787e0f1344ad9a157d28414dd63b2 [2023-11-26 11:51:30,712 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:51:30,715 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:51:30,717 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:51:30,717 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:51:30,722 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:51:30,723 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:51:30" (1/1) ... [2023-11-26 11:51:30,724 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7933d018 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:30, skipping insertion in model container [2023-11-26 11:51:30,724 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:51:30" (1/1) ... [2023-11-26 11:51:30,817 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:51:30,999 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-90.i[916,929] [2023-11-26 11:51:31,345 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:51:31,376 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:51:31,390 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-90.i[916,929] [2023-11-26 11:51:31,657 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:51:31,681 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:51:31,682 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:31 WrapperNode [2023-11-26 11:51:31,682 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:51:31,683 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:51:31,684 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:51:31,684 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:51:31,693 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:31" (1/1) ... [2023-11-26 11:51:31,723 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:31" (1/1) ... [2023-11-26 11:51:31,860 INFO L138 Inliner]: procedures = 26, calls = 99, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 704 [2023-11-26 11:51:31,861 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:51:31,862 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:51:31,862 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:51:31,862 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:51:31,875 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:31" (1/1) ... [2023-11-26 11:51:31,875 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:31" (1/1) ... [2023-11-26 11:51:31,889 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:31" (1/1) ... [2023-11-26 11:51:31,970 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-26 11:51:31,970 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:31" (1/1) ... [2023-11-26 11:51:31,971 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:31" (1/1) ... [2023-11-26 11:51:32,029 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:31" (1/1) ... [2023-11-26 11:51:32,039 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:31" (1/1) ... [2023-11-26 11:51:32,095 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:31" (1/1) ... [2023-11-26 11:51:32,101 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:31" (1/1) ... [2023-11-26 11:51:32,148 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:51:32,149 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:51:32,149 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:51:32,149 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:51:32,150 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:31" (1/1) ... [2023-11-26 11:51:32,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:51:32,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:51:32,186 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:51:32,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:51:32,249 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:51:32,249 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-26 11:51:32,250 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-26 11:51:32,250 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:51:32,251 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:51:32,251 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:51:32,464 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:51:32,467 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:51:33,869 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:51:33,945 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:51:33,945 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 11:51:33,946 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:51:33 BoogieIcfgContainer [2023-11-26 11:51:33,946 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:51:33,949 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:51:33,949 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:51:33,952 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:51:33,953 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:51:30" (1/3) ... [2023-11-26 11:51:33,953 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@162b64e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:51:33, skipping insertion in model container [2023-11-26 11:51:33,954 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:31" (2/3) ... [2023-11-26 11:51:33,954 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@162b64e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:51:33, skipping insertion in model container [2023-11-26 11:51:33,954 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:51:33" (3/3) ... [2023-11-26 11:51:33,959 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount500_file-90.i [2023-11-26 11:51:33,980 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:51:33,980 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 11:51:34,061 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:51:34,071 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@43c240e1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:51:34,071 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 11:51:34,079 INFO L276 IsEmpty]: Start isEmpty. Operand has 279 states, 190 states have (on average 1.563157894736842) internal successors, (297), 191 states have internal predecessors, (297), 86 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 86 states have call predecessors, (86), 86 states have call successors, (86) [2023-11-26 11:51:34,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 562 [2023-11-26 11:51:34,133 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:51:34,135 INFO L195 NwaCegarLoop]: trace histogram [86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:51:34,135 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:51:34,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:34,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1463564674, now seen corresponding path program 1 times [2023-11-26 11:51:34,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:34,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165961661] [2023-11-26 11:51:34,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:34,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:34,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:34,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:34,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165961661] [2023-11-26 11:51:34,760 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-26 11:51:34,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647714828] [2023-11-26 11:51:34,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:34,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:34,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:51:34,765 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:51:34,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:51:35,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:35,297 INFO L262 TraceCheckSpWp]: Trace formula consists of 1355 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-26 11:51:35,343 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:51:35,505 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 170 proven. 0 refuted. 0 times theorem prover too weak. 14450 trivial. 0 not checked. [2023-11-26 11:51:35,506 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:51:35,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647714828] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:51:35,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:51:35,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:51:35,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837891473] [2023-11-26 11:51:35,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:51:35,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 11:51:35,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:35,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 11:51:35,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:51:35,554 INFO L87 Difference]: Start difference. First operand has 279 states, 190 states have (on average 1.563157894736842) internal successors, (297), 191 states have internal predecessors, (297), 86 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 86 states have call predecessors, (86), 86 states have call successors, (86) Second operand has 2 states, 2 states have (on average 68.0) internal successors, (136), 2 states have internal predecessors, (136), 2 states have call successors, (86), 2 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 2 states have call successors, (86) [2023-11-26 11:51:35,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:51:35,660 INFO L93 Difference]: Finished difference Result 555 states and 1022 transitions. [2023-11-26 11:51:35,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 11:51:35,665 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 68.0) internal successors, (136), 2 states have internal predecessors, (136), 2 states have call successors, (86), 2 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 2 states have call successors, (86) Word has length 561 [2023-11-26 11:51:35,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:51:35,684 INFO L225 Difference]: With dead ends: 555 [2023-11-26 11:51:35,684 INFO L226 Difference]: Without dead ends: 277 [2023-11-26 11:51:35,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 560 GetRequests, 560 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:51:35,702 INFO L413 NwaCegarLoop]: 459 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:51:35,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 459 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:51:35,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2023-11-26 11:51:35,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 277. [2023-11-26 11:51:35,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 189 states have (on average 1.5343915343915344) internal successors, (290), 189 states have internal predecessors, (290), 86 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 86 states have call predecessors, (86), 86 states have call successors, (86) [2023-11-26 11:51:35,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 462 transitions. [2023-11-26 11:51:35,869 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 462 transitions. Word has length 561 [2023-11-26 11:51:35,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:51:35,873 INFO L495 AbstractCegarLoop]: Abstraction has 277 states and 462 transitions. [2023-11-26 11:51:35,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 68.0) internal successors, (136), 2 states have internal predecessors, (136), 2 states have call successors, (86), 2 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 2 states have call successors, (86) [2023-11-26 11:51:35,874 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 462 transitions. [2023-11-26 11:51:35,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 562 [2023-11-26 11:51:35,897 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:51:35,898 INFO L195 NwaCegarLoop]: trace histogram [86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:51:35,914 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-26 11:51:36,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-26 11:51:36,107 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:51:36,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:36,108 INFO L85 PathProgramCache]: Analyzing trace with hash 476018446, now seen corresponding path program 1 times [2023-11-26 11:51:36,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:36,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132481736] [2023-11-26 11:51:36,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:36,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:36,321 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:51:36,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1332692689] [2023-11-26 11:51:36,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:36,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:36,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:51:36,324 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:51:36,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:51:36,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:36,860 INFO L262 TraceCheckSpWp]: Trace formula consists of 1355 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 11:51:36,872 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:51:36,969 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14620 trivial. 0 not checked. [2023-11-26 11:51:36,969 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:51:36,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:36,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132481736] [2023-11-26 11:51:36,970 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:51:36,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332692689] [2023-11-26 11:51:36,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332692689] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:51:36,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:51:36,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:51:36,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484806163] [2023-11-26 11:51:36,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:51:36,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:51:36,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:36,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:51:36,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:51:36,978 INFO L87 Difference]: Start difference. First operand 277 states and 462 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) [2023-11-26 11:51:37,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:51:37,124 INFO L93 Difference]: Finished difference Result 783 states and 1303 transitions. [2023-11-26 11:51:37,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:51:37,125 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) Word has length 561 [2023-11-26 11:51:37,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:51:37,140 INFO L225 Difference]: With dead ends: 783 [2023-11-26 11:51:37,140 INFO L226 Difference]: Without dead ends: 507 [2023-11-26 11:51:37,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 560 GetRequests, 559 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:51:37,145 INFO L413 NwaCegarLoop]: 454 mSDtfsCounter, 374 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 901 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:51:37,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [374 Valid, 901 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:51:37,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2023-11-26 11:51:37,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 504. [2023-11-26 11:51:37,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 344 states have (on average 1.5232558139534884) internal successors, (524), 345 states have internal predecessors, (524), 157 states have call successors, (157), 2 states have call predecessors, (157), 2 states have return successors, (157), 156 states have call predecessors, (157), 157 states have call successors, (157) [2023-11-26 11:51:37,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 838 transitions. [2023-11-26 11:51:37,263 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 838 transitions. Word has length 561 [2023-11-26 11:51:37,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:51:37,266 INFO L495 AbstractCegarLoop]: Abstraction has 504 states and 838 transitions. [2023-11-26 11:51:37,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) [2023-11-26 11:51:37,267 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 838 transitions. [2023-11-26 11:51:37,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 562 [2023-11-26 11:51:37,275 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:51:37,276 INFO L195 NwaCegarLoop]: trace histogram [86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:51:37,288 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-26 11:51:37,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:37,485 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:51:37,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:37,486 INFO L85 PathProgramCache]: Analyzing trace with hash 855354634, now seen corresponding path program 1 times [2023-11-26 11:51:37,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:37,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672989410] [2023-11-26 11:51:37,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:37,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:37,619 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:51:37,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [579833054] [2023-11-26 11:51:37,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:37,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:37,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:51:37,622 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:51:37,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:51:38,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:38,153 INFO L262 TraceCheckSpWp]: Trace formula consists of 1353 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 11:51:38,166 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:51:38,249 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14620 trivial. 0 not checked. [2023-11-26 11:51:38,249 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:51:38,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:38,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672989410] [2023-11-26 11:51:38,250 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:51:38,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579833054] [2023-11-26 11:51:38,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579833054] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:51:38,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:51:38,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:51:38,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355781843] [2023-11-26 11:51:38,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:51:38,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:51:38,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:38,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:51:38,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:51:38,255 INFO L87 Difference]: Start difference. First operand 504 states and 838 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) [2023-11-26 11:51:38,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:51:38,384 INFO L93 Difference]: Finished difference Result 1502 states and 2499 transitions. [2023-11-26 11:51:38,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:51:38,385 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) Word has length 561 [2023-11-26 11:51:38,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:51:38,397 INFO L225 Difference]: With dead ends: 1502 [2023-11-26 11:51:38,397 INFO L226 Difference]: Without dead ends: 999 [2023-11-26 11:51:38,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 560 GetRequests, 559 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:51:38,402 INFO L413 NwaCegarLoop]: 453 mSDtfsCounter, 430 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 900 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:51:38,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [430 Valid, 900 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:51:38,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2023-11-26 11:51:38,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 570. [2023-11-26 11:51:38,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 410 states have (on average 1.5439024390243903) internal successors, (633), 411 states have internal predecessors, (633), 157 states have call successors, (157), 2 states have call predecessors, (157), 2 states have return successors, (157), 156 states have call predecessors, (157), 157 states have call successors, (157) [2023-11-26 11:51:38,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 947 transitions. [2023-11-26 11:51:38,501 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 947 transitions. Word has length 561 [2023-11-26 11:51:38,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:51:38,503 INFO L495 AbstractCegarLoop]: Abstraction has 570 states and 947 transitions. [2023-11-26 11:51:38,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) [2023-11-26 11:51:38,504 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 947 transitions. [2023-11-26 11:51:38,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 562 [2023-11-26 11:51:38,510 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:51:38,510 INFO L195 NwaCegarLoop]: trace histogram [86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:51:38,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 11:51:38,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:38,720 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:51:38,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:38,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1933147466, now seen corresponding path program 1 times [2023-11-26 11:51:38,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:38,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452225144] [2023-11-26 11:51:38,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:38,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:38,826 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:51:38,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [409681581] [2023-11-26 11:51:38,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:38,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:38,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:51:38,828 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:51:38,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:51:39,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:39,358 INFO L262 TraceCheckSpWp]: Trace formula consists of 1355 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:51:39,380 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:51:40,362 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14620 trivial. 0 not checked. [2023-11-26 11:51:40,362 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:51:40,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:40,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452225144] [2023-11-26 11:51:40,366 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:51:40,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409681581] [2023-11-26 11:51:40,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409681581] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:51:40,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:51:40,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:51:40,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445266157] [2023-11-26 11:51:40,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:51:40,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:51:40,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:40,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:51:40,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:51:40,371 INFO L87 Difference]: Start difference. First operand 570 states and 947 transitions. Second operand has 4 states, 4 states have (on average 33.5) internal successors, (134), 3 states have internal predecessors, (134), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) [2023-11-26 11:51:40,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:51:40,963 INFO L93 Difference]: Finished difference Result 2277 states and 3785 transitions. [2023-11-26 11:51:40,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:51:40,964 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 3 states have internal predecessors, (134), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) Word has length 561 [2023-11-26 11:51:40,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:51:40,982 INFO L225 Difference]: With dead ends: 2277 [2023-11-26 11:51:40,982 INFO L226 Difference]: Without dead ends: 1708 [2023-11-26 11:51:40,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 560 GetRequests, 558 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:51:40,989 INFO L413 NwaCegarLoop]: 709 mSDtfsCounter, 847 mSDsluCounter, 716 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 847 SdHoareTripleChecker+Valid, 1425 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 11:51:40,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [847 Valid, 1425 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 11:51:40,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1708 states. [2023-11-26 11:51:41,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1708 to 1166. [2023-11-26 11:51:41,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1166 states, 847 states have (on average 1.5430932703659976) internal successors, (1307), 849 states have internal predecessors, (1307), 314 states have call successors, (314), 4 states have call predecessors, (314), 4 states have return successors, (314), 312 states have call predecessors, (314), 314 states have call successors, (314) [2023-11-26 11:51:41,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1166 states to 1166 states and 1935 transitions. [2023-11-26 11:51:41,287 INFO L78 Accepts]: Start accepts. Automaton has 1166 states and 1935 transitions. Word has length 561 [2023-11-26 11:51:41,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:51:41,289 INFO L495 AbstractCegarLoop]: Abstraction has 1166 states and 1935 transitions. [2023-11-26 11:51:41,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 3 states have internal predecessors, (134), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) [2023-11-26 11:51:41,290 INFO L276 IsEmpty]: Start isEmpty. Operand 1166 states and 1935 transitions. [2023-11-26 11:51:41,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 562 [2023-11-26 11:51:41,297 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:51:41,298 INFO L195 NwaCegarLoop]: trace histogram [86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:51:41,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 11:51:41,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:41,508 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:51:41,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:41,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1100902580, now seen corresponding path program 1 times [2023-11-26 11:51:41,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:41,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128535636] [2023-11-26 11:51:41,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:41,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:41,609 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:51:41,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [811387040] [2023-11-26 11:51:41,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:41,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:41,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:51:41,611 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:51:41,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:51:42,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:42,083 INFO L262 TraceCheckSpWp]: Trace formula consists of 1354 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:51:42,099 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:51:42,924 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14620 trivial. 0 not checked. [2023-11-26 11:51:42,928 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:51:42,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:42,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128535636] [2023-11-26 11:51:42,930 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:51:42,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811387040] [2023-11-26 11:51:42,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811387040] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:51:42,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:51:42,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:51:42,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437906858] [2023-11-26 11:51:42,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:51:42,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:51:42,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:42,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:51:42,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:51:42,939 INFO L87 Difference]: Start difference. First operand 1166 states and 1935 transitions. Second operand has 4 states, 4 states have (on average 33.5) internal successors, (134), 3 states have internal predecessors, (134), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) [2023-11-26 11:51:43,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:51:43,441 INFO L93 Difference]: Finished difference Result 2337 states and 3878 transitions. [2023-11-26 11:51:43,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:51:43,442 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 3 states have internal predecessors, (134), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) Word has length 561 [2023-11-26 11:51:43,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:51:43,453 INFO L225 Difference]: With dead ends: 2337 [2023-11-26 11:51:43,453 INFO L226 Difference]: Without dead ends: 1172 [2023-11-26 11:51:43,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 560 GetRequests, 558 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:51:43,458 INFO L413 NwaCegarLoop]: 451 mSDtfsCounter, 185 mSDsluCounter, 719 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 1170 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 11:51:43,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 1170 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 11:51:43,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1172 states. [2023-11-26 11:51:43,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1172 to 1166. [2023-11-26 11:51:43,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1166 states, 847 states have (on average 1.5407319952774499) internal successors, (1305), 849 states have internal predecessors, (1305), 314 states have call successors, (314), 4 states have call predecessors, (314), 4 states have return successors, (314), 312 states have call predecessors, (314), 314 states have call successors, (314) [2023-11-26 11:51:43,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1166 states to 1166 states and 1933 transitions. [2023-11-26 11:51:43,626 INFO L78 Accepts]: Start accepts. Automaton has 1166 states and 1933 transitions. Word has length 561 [2023-11-26 11:51:43,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:51:43,627 INFO L495 AbstractCegarLoop]: Abstraction has 1166 states and 1933 transitions. [2023-11-26 11:51:43,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 3 states have internal predecessors, (134), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) [2023-11-26 11:51:43,628 INFO L276 IsEmpty]: Start isEmpty. Operand 1166 states and 1933 transitions. [2023-11-26 11:51:43,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 563 [2023-11-26 11:51:43,634 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:51:43,635 INFO L195 NwaCegarLoop]: trace histogram [86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:51:43,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 11:51:43,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:43,844 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:51:43,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:43,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1662532441, now seen corresponding path program 1 times [2023-11-26 11:51:43,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:43,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503859788] [2023-11-26 11:51:43,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:43,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:43,935 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:51:43,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1131784447] [2023-11-26 11:51:43,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:43,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:43,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:51:43,937 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:51:43,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 11:51:44,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:44,475 INFO L262 TraceCheckSpWp]: Trace formula consists of 1354 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 11:51:44,498 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:51:44,546 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14620 trivial. 0 not checked. [2023-11-26 11:51:44,546 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:51:44,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:44,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503859788] [2023-11-26 11:51:44,547 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:51:44,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131784447] [2023-11-26 11:51:44,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131784447] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:51:44,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:51:44,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:51:44,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536958249] [2023-11-26 11:51:44,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:51:44,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:51:44,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:44,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:51:44,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:51:44,551 INFO L87 Difference]: Start difference. First operand 1166 states and 1933 transitions. Second operand has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) [2023-11-26 11:51:45,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:51:45,552 INFO L93 Difference]: Finished difference Result 3351 states and 5529 transitions. [2023-11-26 11:51:45,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:51:45,553 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) Word has length 562 [2023-11-26 11:51:45,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:51:45,571 INFO L225 Difference]: With dead ends: 3351 [2023-11-26 11:51:45,572 INFO L226 Difference]: Without dead ends: 2186 [2023-11-26 11:51:45,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 563 GetRequests, 560 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:51:45,578 INFO L413 NwaCegarLoop]: 716 mSDtfsCounter, 916 mSDsluCounter, 804 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 916 SdHoareTripleChecker+Valid, 1520 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 328 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-26 11:51:45,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [916 Valid, 1520 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [328 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-26 11:51:45,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2186 states. [2023-11-26 11:51:45,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2186 to 1717. [2023-11-26 11:51:45,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1717 states, 1154 states have (on average 1.4731369150779896) internal successors, (1700), 1159 states have internal predecessors, (1700), 552 states have call successors, (552), 10 states have call predecessors, (552), 10 states have return successors, (552), 547 states have call predecessors, (552), 552 states have call successors, (552) [2023-11-26 11:51:45,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1717 states to 1717 states and 2804 transitions. [2023-11-26 11:51:45,877 INFO L78 Accepts]: Start accepts. Automaton has 1717 states and 2804 transitions. Word has length 562 [2023-11-26 11:51:45,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:51:45,878 INFO L495 AbstractCegarLoop]: Abstraction has 1717 states and 2804 transitions. [2023-11-26 11:51:45,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) [2023-11-26 11:51:45,879 INFO L276 IsEmpty]: Start isEmpty. Operand 1717 states and 2804 transitions. [2023-11-26 11:51:45,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 563 [2023-11-26 11:51:45,886 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:51:45,886 INFO L195 NwaCegarLoop]: trace histogram [86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:51:45,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 11:51:46,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:46,101 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:51:46,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:46,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1931420763, now seen corresponding path program 1 times [2023-11-26 11:51:46,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:46,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935840906] [2023-11-26 11:51:46,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:46,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:46,206 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:51:46,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1467348926] [2023-11-26 11:51:46,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:46,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:46,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:51:46,208 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:51:46,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 11:51:46,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:46,695 INFO L262 TraceCheckSpWp]: Trace formula consists of 1351 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:51:46,710 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:51:46,938 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 4425 proven. 45 refuted. 0 times theorem prover too weak. 10150 trivial. 0 not checked. [2023-11-26 11:51:46,939 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:51:47,363 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 210 proven. 45 refuted. 0 times theorem prover too weak. 14365 trivial. 0 not checked. [2023-11-26 11:51:47,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:47,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935840906] [2023-11-26 11:51:47,364 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:51:47,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467348926] [2023-11-26 11:51:47,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467348926] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:51:47,364 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:51:47,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-26 11:51:47,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864798365] [2023-11-26 11:51:47,365 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:51:47,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:51:47,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:47,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:51:47,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:51:47,372 INFO L87 Difference]: Start difference. First operand 1717 states and 2804 transitions. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 2 states have call successors, (101), 2 states have call predecessors, (101), 4 states have return successors, (102), 2 states have call predecessors, (102), 2 states have call successors, (102) [2023-11-26 11:51:48,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:51:48,254 INFO L93 Difference]: Finished difference Result 3365 states and 5452 transitions. [2023-11-26 11:51:48,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:51:48,255 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 2 states have call successors, (101), 2 states have call predecessors, (101), 4 states have return successors, (102), 2 states have call predecessors, (102), 2 states have call successors, (102) Word has length 562 [2023-11-26 11:51:48,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:51:48,275 INFO L225 Difference]: With dead ends: 3365 [2023-11-26 11:51:48,276 INFO L226 Difference]: Without dead ends: 1779 [2023-11-26 11:51:48,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1126 GetRequests, 1116 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:51:48,285 INFO L413 NwaCegarLoop]: 365 mSDtfsCounter, 581 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 650 SdHoareTripleChecker+Valid, 920 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-26 11:51:48,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [650 Valid, 920 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-26 11:51:48,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1779 states. [2023-11-26 11:51:48,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1779 to 1724. [2023-11-26 11:51:48,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1724 states, 1163 states have (on average 1.4582975064488393) internal successors, (1696), 1168 states have internal predecessors, (1696), 546 states have call successors, (546), 14 states have call predecessors, (546), 14 states have return successors, (546), 541 states have call predecessors, (546), 546 states have call successors, (546) [2023-11-26 11:51:48,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1724 states to 1724 states and 2788 transitions. [2023-11-26 11:51:48,542 INFO L78 Accepts]: Start accepts. Automaton has 1724 states and 2788 transitions. Word has length 562 [2023-11-26 11:51:48,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:51:48,543 INFO L495 AbstractCegarLoop]: Abstraction has 1724 states and 2788 transitions. [2023-11-26 11:51:48,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 2 states have call successors, (101), 2 states have call predecessors, (101), 4 states have return successors, (102), 2 states have call predecessors, (102), 2 states have call successors, (102) [2023-11-26 11:51:48,544 INFO L276 IsEmpty]: Start isEmpty. Operand 1724 states and 2788 transitions. [2023-11-26 11:51:48,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 563 [2023-11-26 11:51:48,550 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:51:48,551 INFO L195 NwaCegarLoop]: trace histogram [86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:51:48,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 11:51:48,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:48,761 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:51:48,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:48,761 INFO L85 PathProgramCache]: Analyzing trace with hash 2133244697, now seen corresponding path program 1 times [2023-11-26 11:51:48,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:48,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958680478] [2023-11-26 11:51:48,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:48,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:48,884 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:51:48,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1134496372] [2023-11-26 11:51:48,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:48,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:48,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:51:48,886 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:51:48,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 11:51:49,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:49,412 INFO L262 TraceCheckSpWp]: Trace formula consists of 1350 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 11:51:49,423 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:51:49,714 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 4845 proven. 51 refuted. 0 times theorem prover too weak. 9724 trivial. 0 not checked. [2023-11-26 11:51:49,714 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:51:50,143 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 204 proven. 51 refuted. 0 times theorem prover too weak. 14365 trivial. 0 not checked. [2023-11-26 11:51:50,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:50,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958680478] [2023-11-26 11:51:50,143 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:51:50,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134496372] [2023-11-26 11:51:50,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134496372] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:51:50,144 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:51:50,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-11-26 11:51:50,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010058843] [2023-11-26 11:51:50,145 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:51:50,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 11:51:50,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:50,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 11:51:50,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:51:50,148 INFO L87 Difference]: Start difference. First operand 1724 states and 2788 transitions. Second operand has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 2 states have call successors, (103), 2 states have call predecessors, (103), 4 states have return successors, (104), 2 states have call predecessors, (104), 2 states have call successors, (104) [2023-11-26 11:51:51,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:51:51,919 INFO L93 Difference]: Finished difference Result 5028 states and 8045 transitions. [2023-11-26 11:51:51,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-26 11:51:51,920 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 2 states have call successors, (103), 2 states have call predecessors, (103), 4 states have return successors, (104), 2 states have call predecessors, (104), 2 states have call successors, (104) Word has length 562 [2023-11-26 11:51:51,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:51:51,950 INFO L225 Difference]: With dead ends: 5028 [2023-11-26 11:51:51,950 INFO L226 Difference]: Without dead ends: 3439 [2023-11-26 11:51:51,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1134 GetRequests, 1115 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2023-11-26 11:51:51,959 INFO L413 NwaCegarLoop]: 356 mSDtfsCounter, 1670 mSDsluCounter, 892 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 848 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1739 SdHoareTripleChecker+Valid, 1248 SdHoareTripleChecker+Invalid, 1424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 848 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:51:51,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1739 Valid, 1248 Invalid, 1424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [848 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-26 11:51:51,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3439 states. [2023-11-26 11:51:52,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3439 to 1791. [2023-11-26 11:51:52,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1791 states, 1232 states have (on average 1.468344155844156) internal successors, (1809), 1237 states have internal predecessors, (1809), 540 states have call successors, (540), 18 states have call predecessors, (540), 18 states have return successors, (540), 535 states have call predecessors, (540), 540 states have call successors, (540) [2023-11-26 11:51:52,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1791 states to 1791 states and 2889 transitions. [2023-11-26 11:51:52,342 INFO L78 Accepts]: Start accepts. Automaton has 1791 states and 2889 transitions. Word has length 562 [2023-11-26 11:51:52,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:51:52,343 INFO L495 AbstractCegarLoop]: Abstraction has 1791 states and 2889 transitions. [2023-11-26 11:51:52,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 2 states have call successors, (103), 2 states have call predecessors, (103), 4 states have return successors, (104), 2 states have call predecessors, (104), 2 states have call successors, (104) [2023-11-26 11:51:52,344 INFO L276 IsEmpty]: Start isEmpty. Operand 1791 states and 2889 transitions. [2023-11-26 11:51:52,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 563 [2023-11-26 11:51:52,350 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:51:52,351 INFO L195 NwaCegarLoop]: trace histogram [86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:51:52,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 11:51:52,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:52,565 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:51:52,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:52,565 INFO L85 PathProgramCache]: Analyzing trace with hash -2099682985, now seen corresponding path program 1 times [2023-11-26 11:51:52,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:52,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834703814] [2023-11-26 11:51:52,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:52,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:52,719 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:51:52,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1895007485] [2023-11-26 11:51:52,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:52,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:52,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:51:52,729 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:51:52,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 11:51:53,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:53,479 INFO L262 TraceCheckSpWp]: Trace formula consists of 1349 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-26 11:51:53,504 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:51:55,315 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14620 trivial. 0 not checked. [2023-11-26 11:51:55,315 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:51:55,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:55,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834703814] [2023-11-26 11:51:55,316 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:51:55,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895007485] [2023-11-26 11:51:55,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895007485] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:51:55,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:51:55,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:51:55,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21124992] [2023-11-26 11:51:55,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:51:55,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:51:55,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:55,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:51:55,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:51:55,320 INFO L87 Difference]: Start difference. First operand 1791 states and 2889 transitions. Second operand has 4 states, 4 states have (on average 33.75) internal successors, (135), 3 states have internal predecessors, (135), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) [2023-11-26 11:51:55,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:51:55,855 INFO L93 Difference]: Finished difference Result 2734 states and 4426 transitions. [2023-11-26 11:51:55,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:51:55,856 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 3 states have internal predecessors, (135), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) Word has length 562 [2023-11-26 11:51:55,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:51:55,865 INFO L225 Difference]: With dead ends: 2734 [2023-11-26 11:51:55,865 INFO L226 Difference]: Without dead ends: 1082 [2023-11-26 11:51:55,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 562 GetRequests, 559 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:51:55,872 INFO L413 NwaCegarLoop]: 450 mSDtfsCounter, 397 mSDsluCounter, 897 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 1347 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 11:51:55,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [397 Valid, 1347 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 11:51:55,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2023-11-26 11:51:55,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 755. [2023-11-26 11:51:55,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 506 states have (on average 1.4505928853754941) internal successors, (734), 507 states have internal predecessors, (734), 239 states have call successors, (239), 9 states have call predecessors, (239), 9 states have return successors, (239), 238 states have call predecessors, (239), 239 states have call successors, (239) [2023-11-26 11:51:55,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 1212 transitions. [2023-11-26 11:51:55,993 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 1212 transitions. Word has length 562 [2023-11-26 11:51:55,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:51:55,994 INFO L495 AbstractCegarLoop]: Abstraction has 755 states and 1212 transitions. [2023-11-26 11:51:55,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 3 states have internal predecessors, (135), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) [2023-11-26 11:51:55,995 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 1212 transitions. [2023-11-26 11:51:56,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 563 [2023-11-26 11:51:56,000 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:51:56,000 INFO L195 NwaCegarLoop]: trace histogram [86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:51:56,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 11:51:56,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:56,212 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:51:56,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:56,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1081927886, now seen corresponding path program 1 times [2023-11-26 11:51:56,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:56,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820014508] [2023-11-26 11:51:56,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:56,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:56,332 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:51:56,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2111602784] [2023-11-26 11:51:56,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:56,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:56,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:51:56,334 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:51:56,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 11:51:56,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:56,889 INFO L262 TraceCheckSpWp]: Trace formula consists of 1353 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 11:51:56,901 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:51:56,972 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14620 trivial. 0 not checked. [2023-11-26 11:51:56,972 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:51:56,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:56,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820014508] [2023-11-26 11:51:56,972 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:51:56,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111602784] [2023-11-26 11:51:56,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111602784] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:51:56,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:51:56,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:51:56,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427267667] [2023-11-26 11:51:56,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:51:56,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:51:56,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:56,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:51:56,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:51:56,977 INFO L87 Difference]: Start difference. First operand 755 states and 1212 transitions. Second operand has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) [2023-11-26 11:51:57,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:51:57,556 INFO L93 Difference]: Finished difference Result 1941 states and 3134 transitions. [2023-11-26 11:51:57,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:51:57,557 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) Word has length 562 [2023-11-26 11:51:57,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:51:57,570 INFO L225 Difference]: With dead ends: 1941 [2023-11-26 11:51:57,570 INFO L226 Difference]: Without dead ends: 1347 [2023-11-26 11:51:57,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 562 GetRequests, 559 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:51:57,573 INFO L413 NwaCegarLoop]: 783 mSDtfsCounter, 595 mSDsluCounter, 952 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 595 SdHoareTripleChecker+Valid, 1735 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 11:51:57,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [595 Valid, 1735 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 11:51:57,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1347 states. [2023-11-26 11:51:57,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1347 to 1341. [2023-11-26 11:51:57,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1341 states, 934 states have (on average 1.474304068522484) internal successors, (1377), 936 states have internal predecessors, (1377), 392 states have call successors, (392), 14 states have call predecessors, (392), 14 states have return successors, (392), 390 states have call predecessors, (392), 392 states have call successors, (392) [2023-11-26 11:51:57,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1341 states to 1341 states and 2161 transitions. [2023-11-26 11:51:57,814 INFO L78 Accepts]: Start accepts. Automaton has 1341 states and 2161 transitions. Word has length 562 [2023-11-26 11:51:57,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:51:57,815 INFO L495 AbstractCegarLoop]: Abstraction has 1341 states and 2161 transitions. [2023-11-26 11:51:57,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) [2023-11-26 11:51:57,816 INFO L276 IsEmpty]: Start isEmpty. Operand 1341 states and 2161 transitions. [2023-11-26 11:51:57,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 563 [2023-11-26 11:51:57,822 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:51:57,823 INFO L195 NwaCegarLoop]: trace histogram [86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:51:57,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-26 11:51:58,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-26 11:51:58,033 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:51:58,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:58,033 INFO L85 PathProgramCache]: Analyzing trace with hash 77183924, now seen corresponding path program 1 times [2023-11-26 11:51:58,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:58,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134439964] [2023-11-26 11:51:58,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:58,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:58,140 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:51:58,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [915779324] [2023-11-26 11:51:58,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:58,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:51:58,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:51:58,142 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:51:58,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-26 11:51:58,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:58,679 INFO L262 TraceCheckSpWp]: Trace formula consists of 1348 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 11:51:58,690 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:51:59,177 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 7305 proven. 141 refuted. 0 times theorem prover too weak. 7174 trivial. 0 not checked. [2023-11-26 11:51:59,177 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:51:59,606 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 114 proven. 141 refuted. 0 times theorem prover too weak. 14365 trivial. 0 not checked. [2023-11-26 11:51:59,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:59,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134439964] [2023-11-26 11:51:59,607 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:51:59,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915779324] [2023-11-26 11:51:59,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915779324] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:51:59,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:51:59,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-26 11:51:59,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586192546] [2023-11-26 11:51:59,608 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:51:59,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 11:51:59,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:59,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 11:51:59,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:51:59,612 INFO L87 Difference]: Start difference. First operand 1341 states and 2161 transitions. Second operand has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 3 states have call successors, (133), 2 states have call predecessors, (133), 4 states have return successors, (134), 3 states have call predecessors, (134), 3 states have call successors, (134) [2023-11-26 11:52:00,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:52:00,575 INFO L93 Difference]: Finished difference Result 2569 states and 4116 transitions. [2023-11-26 11:52:00,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:52:00,578 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 3 states have call successors, (133), 2 states have call predecessors, (133), 4 states have return successors, (134), 3 states have call predecessors, (134), 3 states have call successors, (134) Word has length 562 [2023-11-26 11:52:00,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:52:00,590 INFO L225 Difference]: With dead ends: 2569 [2023-11-26 11:52:00,590 INFO L226 Difference]: Without dead ends: 1389 [2023-11-26 11:52:00,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1127 GetRequests, 1114 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2023-11-26 11:52:00,595 INFO L413 NwaCegarLoop]: 358 mSDtfsCounter, 1163 mSDsluCounter, 716 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1201 SdHoareTripleChecker+Valid, 1074 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-26 11:52:00,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1201 Valid, 1074 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-26 11:52:00,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1389 states. [2023-11-26 11:52:00,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1389 to 1361. [2023-11-26 11:52:00,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1361 states, 949 states have (on average 1.4657534246575343) internal successors, (1391), 951 states have internal predecessors, (1391), 392 states have call successors, (392), 19 states have call predecessors, (392), 19 states have return successors, (392), 390 states have call predecessors, (392), 392 states have call successors, (392) [2023-11-26 11:52:00,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1361 states to 1361 states and 2175 transitions. [2023-11-26 11:52:00,901 INFO L78 Accepts]: Start accepts. Automaton has 1361 states and 2175 transitions. Word has length 562 [2023-11-26 11:52:00,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:52:00,902 INFO L495 AbstractCegarLoop]: Abstraction has 1361 states and 2175 transitions. [2023-11-26 11:52:00,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.6) internal successors, (176), 10 states have internal predecessors, (176), 3 states have call successors, (133), 2 states have call predecessors, (133), 4 states have return successors, (134), 3 states have call predecessors, (134), 3 states have call successors, (134) [2023-11-26 11:52:00,903 INFO L276 IsEmpty]: Start isEmpty. Operand 1361 states and 2175 transitions. [2023-11-26 11:52:00,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 564 [2023-11-26 11:52:00,910 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:52:00,910 INFO L195 NwaCegarLoop]: trace histogram [86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:52:00,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-26 11:52:01,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-26 11:52:01,121 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:52:01,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:01,121 INFO L85 PathProgramCache]: Analyzing trace with hash -245093261, now seen corresponding path program 1 times [2023-11-26 11:52:01,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:01,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334524876] [2023-11-26 11:52:01,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:01,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:01,215 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:52:01,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1407656627] [2023-11-26 11:52:01,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:01,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:01,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:01,217 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:52:01,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-26 11:52:01,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:01,808 INFO L262 TraceCheckSpWp]: Trace formula consists of 1349 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-26 11:52:01,821 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:03,005 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14620 trivial. 0 not checked. [2023-11-26 11:52:03,005 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:52:03,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:03,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334524876] [2023-11-26 11:52:03,006 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:52:03,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407656627] [2023-11-26 11:52:03,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407656627] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:52:03,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:52:03,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-26 11:52:03,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8751651] [2023-11-26 11:52:03,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:52:03,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 11:52:03,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:03,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 11:52:03,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:52:03,010 INFO L87 Difference]: Start difference. First operand 1361 states and 2175 transitions. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 9 states have internal predecessors, (136), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) [2023-11-26 11:52:07,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:52:07,423 INFO L93 Difference]: Finished difference Result 10297 states and 16562 transitions. [2023-11-26 11:52:07,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-26 11:52:07,424 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 9 states have internal predecessors, (136), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) Word has length 563 [2023-11-26 11:52:07,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:52:07,490 INFO L225 Difference]: With dead ends: 10297 [2023-11-26 11:52:07,490 INFO L226 Difference]: Without dead ends: 9101 [2023-11-26 11:52:07,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 590 GetRequests, 554 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=350, Invalid=1056, Unknown=0, NotChecked=0, Total=1406 [2023-11-26 11:52:07,497 INFO L413 NwaCegarLoop]: 787 mSDtfsCounter, 5357 mSDsluCounter, 4924 mSDsCounter, 0 mSdLazyCounter, 734 mSolverCounterSat, 1757 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5357 SdHoareTripleChecker+Valid, 5711 SdHoareTripleChecker+Invalid, 2491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1757 IncrementalHoareTripleChecker+Valid, 734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-11-26 11:52:07,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5357 Valid, 5711 Invalid, 2491 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1757 Valid, 734 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-11-26 11:52:07,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9101 states. [2023-11-26 11:52:08,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9101 to 4345. [2023-11-26 11:52:08,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4345 states, 3092 states have (on average 1.4851228978007762) internal successors, (4592), 3104 states have internal predecessors, (4592), 1202 states have call successors, (1202), 50 states have call predecessors, (1202), 50 states have return successors, (1202), 1190 states have call predecessors, (1202), 1202 states have call successors, (1202) [2023-11-26 11:52:08,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4345 states to 4345 states and 6996 transitions. [2023-11-26 11:52:08,624 INFO L78 Accepts]: Start accepts. Automaton has 4345 states and 6996 transitions. Word has length 563 [2023-11-26 11:52:08,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:52:08,625 INFO L495 AbstractCegarLoop]: Abstraction has 4345 states and 6996 transitions. [2023-11-26 11:52:08,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 9 states have internal predecessors, (136), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) [2023-11-26 11:52:08,626 INFO L276 IsEmpty]: Start isEmpty. Operand 4345 states and 6996 transitions. [2023-11-26 11:52:08,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 564 [2023-11-26 11:52:08,633 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:52:08,633 INFO L195 NwaCegarLoop]: trace histogram [86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:52:08,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-26 11:52:08,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-26 11:52:08,844 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:52:08,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:08,845 INFO L85 PathProgramCache]: Analyzing trace with hash 414438261, now seen corresponding path program 1 times [2023-11-26 11:52:08,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:08,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325215895] [2023-11-26 11:52:08,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:08,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:08,927 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:52:08,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1434928777] [2023-11-26 11:52:08,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:08,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:08,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:08,930 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:52:08,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-26 11:52:09,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:09,668 INFO L262 TraceCheckSpWp]: Trace formula consists of 1351 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-26 11:52:09,682 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:10,383 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14620 trivial. 0 not checked. [2023-11-26 11:52:10,383 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:52:10,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:10,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325215895] [2023-11-26 11:52:10,383 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:52:10,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434928777] [2023-11-26 11:52:10,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434928777] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:52:10,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:52:10,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 11:52:10,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337354777] [2023-11-26 11:52:10,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:52:10,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:52:10,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:10,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:52:10,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:52:10,389 INFO L87 Difference]: Start difference. First operand 4345 states and 6996 transitions. Second operand has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) [2023-11-26 11:52:11,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:52:11,811 INFO L93 Difference]: Finished difference Result 14995 states and 24314 transitions. [2023-11-26 11:52:11,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:52:11,811 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) Word has length 563 [2023-11-26 11:52:11,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:52:11,863 INFO L225 Difference]: With dead ends: 14995 [2023-11-26 11:52:11,863 INFO L226 Difference]: Without dead ends: 10819 [2023-11-26 11:52:11,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 564 GetRequests, 559 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:52:11,880 INFO L413 NwaCegarLoop]: 702 mSDtfsCounter, 1115 mSDsluCounter, 1505 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1115 SdHoareTripleChecker+Valid, 2207 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 11:52:11,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1115 Valid, 2207 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 11:52:11,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10819 states. [2023-11-26 11:52:13,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10819 to 4567. [2023-11-26 11:52:13,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4567 states, 3314 states have (on average 1.4779722389861194) internal successors, (4898), 3326 states have internal predecessors, (4898), 1202 states have call successors, (1202), 50 states have call predecessors, (1202), 50 states have return successors, (1202), 1190 states have call predecessors, (1202), 1202 states have call successors, (1202) [2023-11-26 11:52:13,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4567 states to 4567 states and 7302 transitions. [2023-11-26 11:52:13,087 INFO L78 Accepts]: Start accepts. Automaton has 4567 states and 7302 transitions. Word has length 563 [2023-11-26 11:52:13,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:52:13,088 INFO L495 AbstractCegarLoop]: Abstraction has 4567 states and 7302 transitions. [2023-11-26 11:52:13,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) [2023-11-26 11:52:13,089 INFO L276 IsEmpty]: Start isEmpty. Operand 4567 states and 7302 transitions. [2023-11-26 11:52:13,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 564 [2023-11-26 11:52:13,096 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:52:13,096 INFO L195 NwaCegarLoop]: trace histogram [86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:52:13,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b786ca9-e20b-4e23-85c5-b0af274b6077/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0