./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-8.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_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/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_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-8.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/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_ad65b040-85bc-4c52-be68-1b255accbf3e/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 2197c4d14fd5af1bc627adef461bd5f05d36e421274b7d409fe23e38f5f15829 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:52:52,182 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:52:52,311 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 11:52:52,324 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:52:52,325 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:52:52,367 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:52:52,369 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:52:52,369 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:52:52,370 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:52:52,376 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:52:52,376 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:52:52,377 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:52:52,378 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:52:52,380 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:52:52,381 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:52:52,381 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:52:52,382 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:52:52,382 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:52:52,383 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:52:52,383 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:52:52,384 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:52:52,385 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:52:52,385 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:52:52,385 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:52:52,386 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:52:52,386 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:52:52,387 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:52:52,388 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:52:52,388 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:52:52,389 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:52:52,390 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:52:52,390 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:52:52,391 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:52:52,391 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:52:52,391 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:52:52,392 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:52:52,392 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:52:52,392 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:52:52,392 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:52:52,393 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:52:52,393 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:52:52,393 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:52:52,394 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_ad65b040-85bc-4c52-be68-1b255accbf3e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2197c4d14fd5af1bc627adef461bd5f05d36e421274b7d409fe23e38f5f15829 [2023-11-26 11:52:52,763 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:52:52,802 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:52:52,805 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:52:52,806 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:52:52,807 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:52:52,809 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-8.i [2023-11-26 11:52:55,992 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:52:56,401 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:52:56,402 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-8.i [2023-11-26 11:52:56,427 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/data/3aee4a2dc/aad770e96e85481982112b5cb30b5f72/FLAGff6387c25 [2023-11-26 11:52:56,443 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/data/3aee4a2dc/aad770e96e85481982112b5cb30b5f72 [2023-11-26 11:52:56,448 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:52:56,450 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:52:56,453 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:52:56,454 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:52:56,459 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:52:56,460 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:52:56" (1/1) ... [2023-11-26 11:52:56,461 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d550390 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:56, skipping insertion in model container [2023-11-26 11:52:56,461 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:52:56" (1/1) ... [2023-11-26 11:52:56,533 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:52:56,714 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_ad65b040-85bc-4c52-be68-1b255accbf3e/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-8.i[915,928] [2023-11-26 11:52:57,028 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:52:57,049 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:52:57,062 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_ad65b040-85bc-4c52-be68-1b255accbf3e/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-8.i[915,928] [2023-11-26 11:52:57,279 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:52:57,302 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:52:57,303 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:57 WrapperNode [2023-11-26 11:52:57,303 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:52:57,304 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:52:57,305 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:52:57,305 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:52:57,313 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:57" (1/1) ... [2023-11-26 11:52:57,345 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:57" (1/1) ... [2023-11-26 11:52:57,471 INFO L138 Inliner]: procedures = 26, calls = 91, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 803 [2023-11-26 11:52:57,471 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:52:57,472 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:52:57,472 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:52:57,473 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:52:57,494 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:57" (1/1) ... [2023-11-26 11:52:57,495 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:57" (1/1) ... [2023-11-26 11:52:57,523 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:57" (1/1) ... [2023-11-26 11:52:57,594 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 11:52:57,595 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:57" (1/1) ... [2023-11-26 11:52:57,595 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:57" (1/1) ... [2023-11-26 11:52:57,681 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:57" (1/1) ... [2023-11-26 11:52:57,705 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:57" (1/1) ... [2023-11-26 11:52:57,737 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:57" (1/1) ... [2023-11-26 11:52:57,749 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:57" (1/1) ... [2023-11-26 11:52:57,781 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:52:57,784 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:52:57,784 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:52:57,785 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:52:57,786 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:57" (1/1) ... [2023-11-26 11:52:57,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:52:57,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:57,822 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:52:57,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:52:57,866 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:52:57,867 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-26 11:52:57,867 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-26 11:52:57,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:52:57,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:52:57,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:52:58,051 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:52:58,054 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:52:59,554 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:52:59,651 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:52:59,651 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 11:52:59,652 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:52:59 BoogieIcfgContainer [2023-11-26 11:52:59,652 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:52:59,656 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:52:59,656 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:52:59,659 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:52:59,660 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:52:56" (1/3) ... [2023-11-26 11:52:59,661 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10037eab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:52:59, skipping insertion in model container [2023-11-26 11:52:59,661 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:57" (2/3) ... [2023-11-26 11:52:59,664 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10037eab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:52:59, skipping insertion in model container [2023-11-26 11:52:59,664 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:52:59" (3/3) ... [2023-11-26 11:52:59,666 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount500_file-8.i [2023-11-26 11:52:59,688 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:52:59,688 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 11:52:59,755 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:52:59,762 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;@54359cc9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:52:59,762 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 11:52:59,769 INFO L276 IsEmpty]: Start isEmpty. Operand has 309 states, 228 states have (on average 1.5657894736842106) internal successors, (357), 229 states have internal predecessors, (357), 78 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2023-11-26 11:52:59,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 552 [2023-11-26 11:52:59,840 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:52:59,841 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:52:59,842 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:52:59,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:59,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1464253359, now seen corresponding path program 1 times [2023-11-26 11:52:59,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:59,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610028639] [2023-11-26 11:52:59,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:59,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:00,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:00,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:00,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610028639] [2023-11-26 11:53:00,366 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-26 11:53:00,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648568423] [2023-11-26 11:53:00,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:00,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:00,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:00,370 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:53:00,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:53:00,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:00,926 INFO L262 TraceCheckSpWp]: Trace formula consists of 1388 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-26 11:53:00,986 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:01,104 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 11858 trivial. 0 not checked. [2023-11-26 11:53:01,104 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:53:01,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648568423] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:53:01,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:53:01,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:53:01,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74112804] [2023-11-26 11:53:01,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:53:01,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 11:53:01,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:01,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 11:53:01,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:53:01,177 INFO L87 Difference]: Start difference. First operand has 309 states, 228 states have (on average 1.5657894736842106) internal successors, (357), 229 states have internal predecessors, (357), 78 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) Second operand has 2 states, 2 states have (on average 83.0) internal successors, (166), 2 states have internal predecessors, (166), 2 states have call successors, (78), 2 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 2 states have call successors, (78) [2023-11-26 11:53:01,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:53:01,312 INFO L93 Difference]: Finished difference Result 615 states and 1102 transitions. [2023-11-26 11:53:01,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 11:53:01,316 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 83.0) internal successors, (166), 2 states have internal predecessors, (166), 2 states have call successors, (78), 2 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 2 states have call successors, (78) Word has length 551 [2023-11-26 11:53:01,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:53:01,337 INFO L225 Difference]: With dead ends: 615 [2023-11-26 11:53:01,338 INFO L226 Difference]: Without dead ends: 307 [2023-11-26 11:53:01,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 550 GetRequests, 550 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 11:53:01,353 INFO L413 NwaCegarLoop]: 502 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, 502 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 11:53:01,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 502 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:53:01,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2023-11-26 11:53:01,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 307. [2023-11-26 11:53:01,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 227 states have (on average 1.5374449339207048) internal successors, (349), 227 states have internal predecessors, (349), 78 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2023-11-26 11:53:01,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 505 transitions. [2023-11-26 11:53:01,474 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 505 transitions. Word has length 551 [2023-11-26 11:53:01,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:53:01,477 INFO L495 AbstractCegarLoop]: Abstraction has 307 states and 505 transitions. [2023-11-26 11:53:01,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 83.0) internal successors, (166), 2 states have internal predecessors, (166), 2 states have call successors, (78), 2 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 2 states have call successors, (78) [2023-11-26 11:53:01,477 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 505 transitions. [2023-11-26 11:53:01,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 552 [2023-11-26 11:53:01,497 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:53:01,498 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:53:01,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:01,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-26 11:53:01,707 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:53:01,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:01,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1945586509, now seen corresponding path program 1 times [2023-11-26 11:53:01,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:01,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165690498] [2023-11-26 11:53:01,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:01,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:01,888 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:53:01,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1408652025] [2023-11-26 11:53:01,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:01,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:01,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:01,891 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:53:01,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:53:02,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:02,362 INFO L262 TraceCheckSpWp]: Trace formula consists of 1388 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-26 11:53:02,377 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:03,436 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12012 trivial. 0 not checked. [2023-11-26 11:53:03,437 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:53:03,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:03,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165690498] [2023-11-26 11:53:03,437 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:53:03,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408652025] [2023-11-26 11:53:03,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408652025] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:53:03,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:53:03,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 11:53:03,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639651062] [2023-11-26 11:53:03,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:53:03,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 11:53:03,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:03,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 11:53:03,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:53:03,447 INFO L87 Difference]: Start difference. First operand 307 states and 505 transitions. Second operand has 9 states, 9 states have (on average 18.22222222222222) internal successors, (164), 8 states have internal predecessors, (164), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-11-26 11:53:05,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:53:05,021 INFO L93 Difference]: Finished difference Result 1348 states and 2223 transitions. [2023-11-26 11:53:05,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-26 11:53:05,023 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 18.22222222222222) internal successors, (164), 8 states have internal predecessors, (164), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) Word has length 551 [2023-11-26 11:53:05,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:53:05,035 INFO L225 Difference]: With dead ends: 1348 [2023-11-26 11:53:05,035 INFO L226 Difference]: Without dead ends: 1042 [2023-11-26 11:53:05,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 557 GetRequests, 543 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2023-11-26 11:53:05,039 INFO L413 NwaCegarLoop]: 935 mSDtfsCounter, 1620 mSDsluCounter, 4220 mSDsCounter, 0 mSdLazyCounter, 926 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1620 SdHoareTripleChecker+Valid, 5155 SdHoareTripleChecker+Invalid, 1083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:53:05,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1620 Valid, 5155 Invalid, 1083 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [157 Valid, 926 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-26 11:53:05,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2023-11-26 11:53:05,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 633. [2023-11-26 11:53:05,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 474 states have (on average 1.5443037974683544) internal successors, (732), 474 states have internal predecessors, (732), 156 states have call successors, (156), 2 states have call predecessors, (156), 2 states have return successors, (156), 156 states have call predecessors, (156), 156 states have call successors, (156) [2023-11-26 11:53:05,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 1044 transitions. [2023-11-26 11:53:05,160 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 1044 transitions. Word has length 551 [2023-11-26 11:53:05,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:53:05,163 INFO L495 AbstractCegarLoop]: Abstraction has 633 states and 1044 transitions. [2023-11-26 11:53:05,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.22222222222222) internal successors, (164), 8 states have internal predecessors, (164), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-11-26 11:53:05,164 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 1044 transitions. [2023-11-26 11:53:05,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 552 [2023-11-26 11:53:05,178 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:53:05,179 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:53:05,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:05,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:05,388 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:53:05,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:05,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1592498127, now seen corresponding path program 1 times [2023-11-26 11:53:05,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:05,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149200983] [2023-11-26 11:53:05,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:05,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:05,516 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:53:05,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [346650887] [2023-11-26 11:53:05,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:05,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:05,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:05,518 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:53:05,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:53:06,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:06,044 INFO L262 TraceCheckSpWp]: Trace formula consists of 1385 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 11:53:06,061 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:06,124 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12012 trivial. 0 not checked. [2023-11-26 11:53:06,124 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:53:06,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:06,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149200983] [2023-11-26 11:53:06,125 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:53:06,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346650887] [2023-11-26 11:53:06,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346650887] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:53:06,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:53:06,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:53:06,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874055199] [2023-11-26 11:53:06,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:53:06,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:53:06,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:06,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:53:06,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:53:06,131 INFO L87 Difference]: Start difference. First operand 633 states and 1044 transitions. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-11-26 11:53:06,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:53:06,253 INFO L93 Difference]: Finished difference Result 1679 states and 2758 transitions. [2023-11-26 11:53:06,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:53:06,254 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) Word has length 551 [2023-11-26 11:53:06,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:53:06,265 INFO L225 Difference]: With dead ends: 1679 [2023-11-26 11:53:06,265 INFO L226 Difference]: Without dead ends: 1047 [2023-11-26 11:53:06,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 550 GetRequests, 549 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 11:53:06,271 INFO L413 NwaCegarLoop]: 572 mSDtfsCounter, 309 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 1059 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:53:06,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 1059 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:53:06,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2023-11-26 11:53:06,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 1043. [2023-11-26 11:53:06,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1043 states, 826 states have (on average 1.5544794188861986) internal successors, (1284), 828 states have internal predecessors, (1284), 212 states have call successors, (212), 4 states have call predecessors, (212), 4 states have return successors, (212), 210 states have call predecessors, (212), 212 states have call successors, (212) [2023-11-26 11:53:06,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1043 states to 1043 states and 1708 transitions. [2023-11-26 11:53:06,401 INFO L78 Accepts]: Start accepts. Automaton has 1043 states and 1708 transitions. Word has length 551 [2023-11-26 11:53:06,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:53:06,406 INFO L495 AbstractCegarLoop]: Abstraction has 1043 states and 1708 transitions. [2023-11-26 11:53:06,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-11-26 11:53:06,407 INFO L276 IsEmpty]: Start isEmpty. Operand 1043 states and 1708 transitions. [2023-11-26 11:53:06,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 552 [2023-11-26 11:53:06,422 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:53:06,423 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:53:06,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:06,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:06,638 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:53:06,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:06,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1377612975, now seen corresponding path program 1 times [2023-11-26 11:53:06,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:06,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628923076] [2023-11-26 11:53:06,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:06,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:06,738 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:53:06,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1975351091] [2023-11-26 11:53:06,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:06,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:06,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:06,740 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:53:06,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:53:07,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:07,260 INFO L262 TraceCheckSpWp]: Trace formula consists of 1386 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 11:53:07,272 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:07,320 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12012 trivial. 0 not checked. [2023-11-26 11:53:07,320 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:53:07,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:07,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628923076] [2023-11-26 11:53:07,321 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:53:07,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975351091] [2023-11-26 11:53:07,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975351091] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:53:07,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:53:07,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:53:07,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068489592] [2023-11-26 11:53:07,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:53:07,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:53:07,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:07,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:53:07,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:53:07,325 INFO L87 Difference]: Start difference. First operand 1043 states and 1708 transitions. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-11-26 11:53:07,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:53:07,464 INFO L93 Difference]: Finished difference Result 2873 states and 4696 transitions. [2023-11-26 11:53:07,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:53:07,465 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) Word has length 551 [2023-11-26 11:53:07,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:53:07,479 INFO L225 Difference]: With dead ends: 2873 [2023-11-26 11:53:07,480 INFO L226 Difference]: Without dead ends: 1831 [2023-11-26 11:53:07,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 550 GetRequests, 549 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 11:53:07,484 INFO L413 NwaCegarLoop]: 566 mSDtfsCounter, 305 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 1050 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:53:07,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 1050 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:53:07,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1831 states. [2023-11-26 11:53:07,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1831 to 1825. [2023-11-26 11:53:07,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1825 states, 1500 states have (on average 1.5586666666666666) internal successors, (2338), 1506 states have internal predecessors, (2338), 316 states have call successors, (316), 8 states have call predecessors, (316), 8 states have return successors, (316), 310 states have call predecessors, (316), 316 states have call successors, (316) [2023-11-26 11:53:07,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1825 states to 1825 states and 2970 transitions. [2023-11-26 11:53:07,657 INFO L78 Accepts]: Start accepts. Automaton has 1825 states and 2970 transitions. Word has length 551 [2023-11-26 11:53:07,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:53:07,658 INFO L495 AbstractCegarLoop]: Abstraction has 1825 states and 2970 transitions. [2023-11-26 11:53:07,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-11-26 11:53:07,659 INFO L276 IsEmpty]: Start isEmpty. Operand 1825 states and 2970 transitions. [2023-11-26 11:53:07,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 552 [2023-11-26 11:53:07,676 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:53:07,676 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:53:07,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:07,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:07,886 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:53:07,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:07,887 INFO L85 PathProgramCache]: Analyzing trace with hash -2095503605, now seen corresponding path program 1 times [2023-11-26 11:53:07,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:07,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39894057] [2023-11-26 11:53:07,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:07,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:07,988 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:53:07,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1610900545] [2023-11-26 11:53:07,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:07,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:07,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:07,990 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:53:07,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:53:08,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:08,524 INFO L262 TraceCheckSpWp]: Trace formula consists of 1383 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-26 11:53:08,543 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:11,359 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12012 trivial. 0 not checked. [2023-11-26 11:53:11,360 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:53:11,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:11,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39894057] [2023-11-26 11:53:11,360 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:53:11,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610900545] [2023-11-26 11:53:11,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610900545] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:53:11,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:53:11,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:53:11,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3253930] [2023-11-26 11:53:11,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:53:11,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:53:11,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:11,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:53:11,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:53:11,365 INFO L87 Difference]: Start difference. First operand 1825 states and 2970 transitions. Second operand has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-11-26 11:53:11,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:53:11,923 INFO L93 Difference]: Finished difference Result 4910 states and 8013 transitions. [2023-11-26 11:53:11,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:53:11,925 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) Word has length 551 [2023-11-26 11:53:11,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:53:11,947 INFO L225 Difference]: With dead ends: 4910 [2023-11-26 11:53:11,947 INFO L226 Difference]: Without dead ends: 3086 [2023-11-26 11:53:11,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 551 GetRequests, 548 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 11:53:11,956 INFO L413 NwaCegarLoop]: 499 mSDtfsCounter, 368 mSDsluCounter, 968 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 1467 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 11:53:11,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 1467 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 11:53:11,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3086 states. [2023-11-26 11:53:12,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3086 to 1972. [2023-11-26 11:53:12,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1972 states, 1568 states have (on average 1.5440051020408163) internal successors, (2421), 1574 states have internal predecessors, (2421), 394 states have call successors, (394), 9 states have call predecessors, (394), 9 states have return successors, (394), 388 states have call predecessors, (394), 394 states have call successors, (394) [2023-11-26 11:53:12,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1972 states to 1972 states and 3209 transitions. [2023-11-26 11:53:12,284 INFO L78 Accepts]: Start accepts. Automaton has 1972 states and 3209 transitions. Word has length 551 [2023-11-26 11:53:12,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:53:12,287 INFO L495 AbstractCegarLoop]: Abstraction has 1972 states and 3209 transitions. [2023-11-26 11:53:12,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-11-26 11:53:12,287 INFO L276 IsEmpty]: Start isEmpty. Operand 1972 states and 3209 transitions. [2023-11-26 11:53:12,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 553 [2023-11-26 11:53:12,295 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:53:12,295 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:53:12,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:12,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:12,505 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:53:12,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:12,506 INFO L85 PathProgramCache]: Analyzing trace with hash -525807221, now seen corresponding path program 1 times [2023-11-26 11:53:12,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:12,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809092904] [2023-11-26 11:53:12,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:12,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:12,596 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:53:12,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [690740805] [2023-11-26 11:53:12,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:12,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:12,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:12,598 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:53:12,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 11:53:13,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:13,091 INFO L262 TraceCheckSpWp]: Trace formula consists of 1385 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:53:13,103 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:13,610 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 5621 proven. 147 refuted. 0 times theorem prover too weak. 6244 trivial. 0 not checked. [2023-11-26 11:53:13,610 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:53:14,099 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 84 proven. 147 refuted. 0 times theorem prover too weak. 11781 trivial. 0 not checked. [2023-11-26 11:53:14,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:14,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809092904] [2023-11-26 11:53:14,099 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:53:14,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690740805] [2023-11-26 11:53:14,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690740805] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:53:14,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:53:14,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-26 11:53:14,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843980404] [2023-11-26 11:53:14,101 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:53:14,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:53:14,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:14,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:53:14,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:53:14,105 INFO L87 Difference]: Start difference. First operand 1972 states and 3209 transitions. Second operand has 7 states, 7 states have (on average 24.857142857142858) internal successors, (174), 7 states have internal predecessors, (174), 2 states have call successors, (127), 2 states have call predecessors, (127), 4 states have return successors, (128), 2 states have call predecessors, (128), 2 states have call successors, (128) [2023-11-26 11:53:14,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:53:14,693 INFO L93 Difference]: Finished difference Result 3020 states and 4909 transitions. [2023-11-26 11:53:14,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 11:53:14,694 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.857142857142858) internal successors, (174), 7 states have internal predecessors, (174), 2 states have call successors, (127), 2 states have call predecessors, (127), 4 states have return successors, (128), 2 states have call predecessors, (128), 2 states have call successors, (128) Word has length 552 [2023-11-26 11:53:14,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:53:14,704 INFO L225 Difference]: With dead ends: 3020 [2023-11-26 11:53:14,704 INFO L226 Difference]: Without dead ends: 1196 [2023-11-26 11:53:14,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1106 GetRequests, 1096 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 11:53:14,711 INFO L413 NwaCegarLoop]: 411 mSDtfsCounter, 322 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 1075 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 11:53:14,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [350 Valid, 1075 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 11:53:14,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2023-11-26 11:53:14,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 1186. [2023-11-26 11:53:14,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1186 states, 891 states have (on average 1.5129068462401796) internal successors, (1348), 893 states have internal predecessors, (1348), 286 states have call successors, (286), 8 states have call predecessors, (286), 8 states have return successors, (286), 284 states have call predecessors, (286), 286 states have call successors, (286) [2023-11-26 11:53:14,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1186 states to 1186 states and 1920 transitions. [2023-11-26 11:53:14,979 INFO L78 Accepts]: Start accepts. Automaton has 1186 states and 1920 transitions. Word has length 552 [2023-11-26 11:53:14,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:53:14,985 INFO L495 AbstractCegarLoop]: Abstraction has 1186 states and 1920 transitions. [2023-11-26 11:53:14,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.857142857142858) internal successors, (174), 7 states have internal predecessors, (174), 2 states have call successors, (127), 2 states have call predecessors, (127), 4 states have return successors, (128), 2 states have call predecessors, (128), 2 states have call successors, (128) [2023-11-26 11:53:14,985 INFO L276 IsEmpty]: Start isEmpty. Operand 1186 states and 1920 transitions. [2023-11-26 11:53:15,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 553 [2023-11-26 11:53:15,006 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:53:15,006 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:53:15,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:15,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:15,216 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:53:15,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:15,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1932174971, now seen corresponding path program 1 times [2023-11-26 11:53:15,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:15,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394488160] [2023-11-26 11:53:15,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:15,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:15,301 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:53:15,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1740586118] [2023-11-26 11:53:15,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:15,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:15,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:15,303 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:53:15,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 11:53:15,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:15,847 INFO L262 TraceCheckSpWp]: Trace formula consists of 1381 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 11:53:15,858 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:15,897 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12012 trivial. 0 not checked. [2023-11-26 11:53:15,898 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:53:15,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:15,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394488160] [2023-11-26 11:53:15,898 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:53:15,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740586118] [2023-11-26 11:53:15,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740586118] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:53:15,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:53:15,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:53:15,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575340565] [2023-11-26 11:53:15,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:53:15,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:53:15,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:15,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:53:15,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:53:15,905 INFO L87 Difference]: Start difference. First operand 1186 states and 1920 transitions. Second operand has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-11-26 11:53:16,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:53:16,067 INFO L93 Difference]: Finished difference Result 2236 states and 3609 transitions. [2023-11-26 11:53:16,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:53:16,069 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) Word has length 552 [2023-11-26 11:53:16,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:53:16,080 INFO L225 Difference]: With dead ends: 2236 [2023-11-26 11:53:16,080 INFO L226 Difference]: Without dead ends: 1202 [2023-11-26 11:53:16,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 551 GetRequests, 550 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 11:53:16,089 INFO L413 NwaCegarLoop]: 490 mSDtfsCounter, 297 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 972 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:53:16,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 972 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:53:16,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1202 states. [2023-11-26 11:53:16,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1202 to 850. [2023-11-26 11:53:16,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 606 states have (on average 1.4702970297029703) internal successors, (891), 606 states have internal predecessors, (891), 234 states have call successors, (234), 9 states have call predecessors, (234), 9 states have return successors, (234), 234 states have call predecessors, (234), 234 states have call successors, (234) [2023-11-26 11:53:16,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 1359 transitions. [2023-11-26 11:53:16,217 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 1359 transitions. Word has length 552 [2023-11-26 11:53:16,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:53:16,218 INFO L495 AbstractCegarLoop]: Abstraction has 850 states and 1359 transitions. [2023-11-26 11:53:16,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-11-26 11:53:16,219 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 1359 transitions. [2023-11-26 11:53:16,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 553 [2023-11-26 11:53:16,225 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:53:16,225 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:53:16,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:16,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:16,436 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:53:16,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:16,438 INFO L85 PathProgramCache]: Analyzing trace with hash -73307887, now seen corresponding path program 1 times [2023-11-26 11:53:16,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:16,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154186379] [2023-11-26 11:53:16,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:16,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:16,544 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:53:16,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [931087516] [2023-11-26 11:53:16,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:16,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:16,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:16,546 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:53:16,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 11:53:17,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:17,046 INFO L262 TraceCheckSpWp]: Trace formula consists of 1383 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 11:53:17,058 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:17,159 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12012 trivial. 0 not checked. [2023-11-26 11:53:17,160 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:53:17,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:17,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154186379] [2023-11-26 11:53:17,160 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:53:17,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931087516] [2023-11-26 11:53:17,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931087516] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:53:17,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:53:17,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:53:17,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523637853] [2023-11-26 11:53:17,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:53:17,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:53:17,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:17,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:53:17,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:53:17,165 INFO L87 Difference]: Start difference. First operand 850 states and 1359 transitions. Second operand has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-11-26 11:53:17,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:53:17,344 INFO L93 Difference]: Finished difference Result 2004 states and 3188 transitions. [2023-11-26 11:53:17,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:53:17,345 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) Word has length 552 [2023-11-26 11:53:17,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:53:17,357 INFO L225 Difference]: With dead ends: 2004 [2023-11-26 11:53:17,357 INFO L226 Difference]: Without dead ends: 1310 [2023-11-26 11:53:17,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 551 GetRequests, 550 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 11:53:17,363 INFO L413 NwaCegarLoop]: 492 mSDtfsCounter, 289 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 974 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:53:17,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 974 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:53:17,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1310 states. [2023-11-26 11:53:17,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1310 to 1276. [2023-11-26 11:53:17,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1276 states, 965 states have (on average 1.4818652849740932) internal successors, (1430), 967 states have internal predecessors, (1430), 294 states have call successors, (294), 16 states have call predecessors, (294), 16 states have return successors, (294), 292 states have call predecessors, (294), 294 states have call successors, (294) [2023-11-26 11:53:17,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1276 states to 1276 states and 2018 transitions. [2023-11-26 11:53:17,543 INFO L78 Accepts]: Start accepts. Automaton has 1276 states and 2018 transitions. Word has length 552 [2023-11-26 11:53:17,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:53:17,544 INFO L495 AbstractCegarLoop]: Abstraction has 1276 states and 2018 transitions. [2023-11-26 11:53:17,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-11-26 11:53:17,545 INFO L276 IsEmpty]: Start isEmpty. Operand 1276 states and 2018 transitions. [2023-11-26 11:53:17,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 553 [2023-11-26 11:53:17,552 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:53:17,552 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:53:17,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:17,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:17,762 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:53:17,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:17,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1545193993, now seen corresponding path program 1 times [2023-11-26 11:53:17,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:17,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762547964] [2023-11-26 11:53:17,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:17,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:17,846 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:53:17,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [69127906] [2023-11-26 11:53:17,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:17,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:17,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:17,848 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:53:17,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 11:53:18,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:18,384 INFO L262 TraceCheckSpWp]: Trace formula consists of 1379 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 11:53:18,396 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:18,459 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12012 trivial. 0 not checked. [2023-11-26 11:53:18,460 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:53:18,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:18,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762547964] [2023-11-26 11:53:18,460 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:53:18,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69127906] [2023-11-26 11:53:18,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69127906] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:53:18,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:53:18,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:53:18,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989347637] [2023-11-26 11:53:18,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:53:18,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:53:18,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:18,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:53:18,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:53:18,464 INFO L87 Difference]: Start difference. First operand 1276 states and 2018 transitions. Second operand has 4 states, 4 states have (on average 41.25) internal successors, (165), 4 states have internal predecessors, (165), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-11-26 11:53:19,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:53:19,153 INFO L93 Difference]: Finished difference Result 4774 states and 7609 transitions. [2023-11-26 11:53:19,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:53:19,154 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.25) internal successors, (165), 4 states have internal predecessors, (165), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) Word has length 552 [2023-11-26 11:53:19,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:53:19,179 INFO L225 Difference]: With dead ends: 4774 [2023-11-26 11:53:19,179 INFO L226 Difference]: Without dead ends: 3657 [2023-11-26 11:53:19,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 553 GetRequests, 550 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 11:53:19,184 INFO L413 NwaCegarLoop]: 554 mSDtfsCounter, 1164 mSDsluCounter, 1197 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1164 SdHoareTripleChecker+Valid, 1751 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 11:53:19,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1164 Valid, 1751 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 11:53:19,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3657 states. [2023-11-26 11:53:19,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3657 to 1591. [2023-11-26 11:53:19,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1591 states, 1280 states have (on average 1.48671875) internal successors, (1903), 1282 states have internal predecessors, (1903), 294 states have call successors, (294), 16 states have call predecessors, (294), 16 states have return successors, (294), 292 states have call predecessors, (294), 294 states have call successors, (294) [2023-11-26 11:53:19,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1591 states to 1591 states and 2491 transitions. [2023-11-26 11:53:19,402 INFO L78 Accepts]: Start accepts. Automaton has 1591 states and 2491 transitions. Word has length 552 [2023-11-26 11:53:19,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:53:19,403 INFO L495 AbstractCegarLoop]: Abstraction has 1591 states and 2491 transitions. [2023-11-26 11:53:19,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.25) internal successors, (165), 4 states have internal predecessors, (165), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-11-26 11:53:19,404 INFO L276 IsEmpty]: Start isEmpty. Operand 1591 states and 2491 transitions. [2023-11-26 11:53:19,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 553 [2023-11-26 11:53:19,413 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:53:19,413 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:53:19,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:19,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:19,629 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:53:19,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:19,630 INFO L85 PathProgramCache]: Analyzing trace with hash 26399815, now seen corresponding path program 1 times [2023-11-26 11:53:19,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:19,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783353130] [2023-11-26 11:53:19,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:19,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:19,712 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:53:19,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [526154649] [2023-11-26 11:53:19,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:19,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:19,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:19,714 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:53:19,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 11:53:20,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:20,243 INFO L262 TraceCheckSpWp]: Trace formula consists of 1382 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:53:20,256 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:20,828 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 5531 proven. 150 refuted. 0 times theorem prover too weak. 6331 trivial. 0 not checked. [2023-11-26 11:53:20,829 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:53:21,326 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 81 proven. 150 refuted. 0 times theorem prover too weak. 11781 trivial. 0 not checked. [2023-11-26 11:53:21,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:21,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783353130] [2023-11-26 11:53:21,326 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:53:21,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526154649] [2023-11-26 11:53:21,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526154649] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:53:21,327 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:53:21,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-26 11:53:21,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879512771] [2023-11-26 11:53:21,328 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:53:21,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:53:21,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:21,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:53:21,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:53:21,332 INFO L87 Difference]: Start difference. First operand 1591 states and 2491 transitions. Second operand has 7 states, 7 states have (on average 24.857142857142858) internal successors, (174), 7 states have internal predecessors, (174), 2 states have call successors, (128), 2 states have call predecessors, (128), 4 states have return successors, (129), 2 states have call predecessors, (129), 2 states have call successors, (129) [2023-11-26 11:53:22,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:53:22,072 INFO L93 Difference]: Finished difference Result 2939 states and 4595 transitions. [2023-11-26 11:53:22,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:53:22,073 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.857142857142858) internal successors, (174), 7 states have internal predecessors, (174), 2 states have call successors, (128), 2 states have call predecessors, (128), 4 states have return successors, (129), 2 states have call predecessors, (129), 2 states have call successors, (129) Word has length 552 [2023-11-26 11:53:22,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:53:22,085 INFO L225 Difference]: With dead ends: 2939 [2023-11-26 11:53:22,085 INFO L226 Difference]: Without dead ends: 1471 [2023-11-26 11:53:22,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1106 GetRequests, 1096 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 11:53:22,090 INFO L413 NwaCegarLoop]: 405 mSDtfsCounter, 877 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 903 SdHoareTripleChecker+Valid, 1055 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 11:53:22,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [903 Valid, 1055 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 11:53:22,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1471 states. [2023-11-26 11:53:22,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1471 to 1445. [2023-11-26 11:53:22,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1445 states, 1129 states have (on average 1.4809565987599647) internal successors, (1672), 1131 states have internal predecessors, (1672), 294 states have call successors, (294), 21 states have call predecessors, (294), 21 states have return successors, (294), 292 states have call predecessors, (294), 294 states have call successors, (294) [2023-11-26 11:53:22,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1445 states to 1445 states and 2260 transitions. [2023-11-26 11:53:22,249 INFO L78 Accepts]: Start accepts. Automaton has 1445 states and 2260 transitions. Word has length 552 [2023-11-26 11:53:22,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:53:22,250 INFO L495 AbstractCegarLoop]: Abstraction has 1445 states and 2260 transitions. [2023-11-26 11:53:22,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.857142857142858) internal successors, (174), 7 states have internal predecessors, (174), 2 states have call successors, (128), 2 states have call predecessors, (128), 4 states have return successors, (129), 2 states have call predecessors, (129), 2 states have call successors, (129) [2023-11-26 11:53:22,251 INFO L276 IsEmpty]: Start isEmpty. Operand 1445 states and 2260 transitions. [2023-11-26 11:53:22,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 553 [2023-11-26 11:53:22,257 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:53:22,258 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:53:22,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:22,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-26 11:53:22,468 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:53:22,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:22,468 INFO L85 PathProgramCache]: Analyzing trace with hash 901093961, now seen corresponding path program 1 times [2023-11-26 11:53:22,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:22,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305456470] [2023-11-26 11:53:22,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:22,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:22,553 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:53:22,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1745751774] [2023-11-26 11:53:22,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:22,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:22,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:22,555 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:53:22,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-26 11:53:23,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:23,146 INFO L262 TraceCheckSpWp]: Trace formula consists of 1381 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-26 11:53:23,159 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:24,792 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 6011 proven. 102 refuted. 0 times theorem prover too weak. 5899 trivial. 0 not checked. [2023-11-26 11:53:24,793 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:53:25,979 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 129 proven. 102 refuted. 0 times theorem prover too weak. 11781 trivial. 0 not checked. [2023-11-26 11:53:25,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:25,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305456470] [2023-11-26 11:53:25,980 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:53:25,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745751774] [2023-11-26 11:53:25,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745751774] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:53:25,981 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:53:25,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 24 [2023-11-26 11:53:25,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170467038] [2023-11-26 11:53:25,982 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:53:25,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-26 11:53:25,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:25,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-26 11:53:25,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2023-11-26 11:53:25,988 INFO L87 Difference]: Start difference. First operand 1445 states and 2260 transitions. Second operand has 24 states, 24 states have (on average 12.791666666666666) internal successors, (307), 24 states have internal predecessors, (307), 4 states have call successors, (156), 3 states have call predecessors, (156), 5 states have return successors, (156), 4 states have call predecessors, (156), 4 states have call successors, (156) [2023-11-26 11:53:33,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:53:33,147 INFO L93 Difference]: Finished difference Result 10681 states and 16944 transitions. [2023-11-26 11:53:33,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-11-26 11:53:33,148 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 12.791666666666666) internal successors, (307), 24 states have internal predecessors, (307), 4 states have call successors, (156), 3 states have call predecessors, (156), 5 states have return successors, (156), 4 states have call predecessors, (156), 4 states have call successors, (156) Word has length 552 [2023-11-26 11:53:33,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:53:33,208 INFO L225 Difference]: With dead ends: 10681 [2023-11-26 11:53:33,208 INFO L226 Difference]: Without dead ends: 9403 [2023-11-26 11:53:33,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1156 GetRequests, 1088 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1287 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=876, Invalid=3954, Unknown=0, NotChecked=0, Total=4830 [2023-11-26 11:53:33,216 INFO L413 NwaCegarLoop]: 658 mSDtfsCounter, 7743 mSDsluCounter, 8316 mSDsCounter, 0 mSdLazyCounter, 4128 mSolverCounterSat, 2003 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7820 SdHoareTripleChecker+Valid, 8974 SdHoareTripleChecker+Invalid, 6131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2003 IncrementalHoareTripleChecker+Valid, 4128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:53:33,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7820 Valid, 8974 Invalid, 6131 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2003 Valid, 4128 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2023-11-26 11:53:33,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9403 states. [2023-11-26 11:53:33,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9403 to 3895. [2023-11-26 11:53:33,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3895 states, 3194 states have (on average 1.4987476518472136) internal successors, (4787), 3202 states have internal predecessors, (4787), 644 states have call successors, (644), 56 states have call predecessors, (644), 56 states have return successors, (644), 636 states have call predecessors, (644), 644 states have call successors, (644) [2023-11-26 11:53:33,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3895 states to 3895 states and 6075 transitions. [2023-11-26 11:53:33,830 INFO L78 Accepts]: Start accepts. Automaton has 3895 states and 6075 transitions. Word has length 552 [2023-11-26 11:53:33,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:53:33,831 INFO L495 AbstractCegarLoop]: Abstraction has 3895 states and 6075 transitions. [2023-11-26 11:53:33,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 12.791666666666666) internal successors, (307), 24 states have internal predecessors, (307), 4 states have call successors, (156), 3 states have call predecessors, (156), 5 states have return successors, (156), 4 states have call predecessors, (156), 4 states have call successors, (156) [2023-11-26 11:53:33,833 INFO L276 IsEmpty]: Start isEmpty. Operand 3895 states and 6075 transitions. [2023-11-26 11:53:33,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 553 [2023-11-26 11:53:33,842 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:53:33,842 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:53:33,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:34,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-26 11:53:34,057 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:53:34,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:34,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1866185025, now seen corresponding path program 1 times [2023-11-26 11:53:34,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:34,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482540725] [2023-11-26 11:53:34,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:34,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:34,132 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:53:34,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1015994390] [2023-11-26 11:53:34,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:34,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:34,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:34,134 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:53:34,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-26 11:53:34,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:34,653 INFO L262 TraceCheckSpWp]: Trace formula consists of 1381 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 11:53:34,663 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:34,703 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12012 trivial. 0 not checked. [2023-11-26 11:53:34,703 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:53:34,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:34,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482540725] [2023-11-26 11:53:34,703 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:53:34,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015994390] [2023-11-26 11:53:34,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015994390] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:53:34,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:53:34,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:53:34,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913858841] [2023-11-26 11:53:34,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:53:34,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:53:34,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:34,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:53:34,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:53:34,708 INFO L87 Difference]: Start difference. First operand 3895 states and 6075 transitions. Second operand has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-11-26 11:53:35,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:53:35,191 INFO L93 Difference]: Finished difference Result 9013 states and 14111 transitions. [2023-11-26 11:53:35,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:53:35,192 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) Word has length 552 [2023-11-26 11:53:35,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:53:35,215 INFO L225 Difference]: With dead ends: 9013 [2023-11-26 11:53:35,216 INFO L226 Difference]: Without dead ends: 5289 [2023-11-26 11:53:35,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 551 GetRequests, 550 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 11:53:35,226 INFO L413 NwaCegarLoop]: 525 mSDtfsCounter, 152 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 990 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:53:35,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 990 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:53:35,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5289 states. [2023-11-26 11:53:35,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5289 to 5275. [2023-11-26 11:53:35,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5275 states, 4406 states have (on average 1.5054471175669542) internal successors, (6633), 4426 states have internal predecessors, (6633), 800 states have call successors, (800), 68 states have call predecessors, (800), 68 states have return successors, (800), 780 states have call predecessors, (800), 800 states have call successors, (800) [2023-11-26 11:53:35,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5275 states to 5275 states and 8233 transitions. [2023-11-26 11:53:35,746 INFO L78 Accepts]: Start accepts. Automaton has 5275 states and 8233 transitions. Word has length 552 [2023-11-26 11:53:35,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:53:35,747 INFO L495 AbstractCegarLoop]: Abstraction has 5275 states and 8233 transitions. [2023-11-26 11:53:35,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-11-26 11:53:35,748 INFO L276 IsEmpty]: Start isEmpty. Operand 5275 states and 8233 transitions. [2023-11-26 11:53:35,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 553 [2023-11-26 11:53:35,759 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:53:35,760 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:53:35,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:35,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-26 11:53:35,977 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:53:35,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:35,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1560625483, now seen corresponding path program 1 times [2023-11-26 11:53:35,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:35,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430623846] [2023-11-26 11:53:35,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:35,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:36,074 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:53:36,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [839713033] [2023-11-26 11:53:36,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:36,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:36,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:36,081 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:53:36,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-26 11:53:36,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:36,621 INFO L262 TraceCheckSpWp]: Trace formula consists of 1381 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-26 11:53:36,631 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:37,233 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12012 trivial. 0 not checked. [2023-11-26 11:53:37,233 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:53:37,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:37,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430623846] [2023-11-26 11:53:37,233 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:53:37,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839713033] [2023-11-26 11:53:37,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839713033] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:53:37,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:53:37,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:53:37,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500163895] [2023-11-26 11:53:37,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:53:37,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:53:37,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:37,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:53:37,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:53:37,237 INFO L87 Difference]: Start difference. First operand 5275 states and 8233 transitions. Second operand has 4 states, 4 states have (on average 41.25) internal successors, (165), 3 states have internal predecessors, (165), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-11-26 11:53:38,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:53:38,154 INFO L93 Difference]: Finished difference Result 15483 states and 24183 transitions. [2023-11-26 11:53:38,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:53:38,165 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.25) internal successors, (165), 3 states have internal predecessors, (165), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) Word has length 552 [2023-11-26 11:53:38,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:53:38,195 INFO L225 Difference]: With dead ends: 15483 [2023-11-26 11:53:38,195 INFO L226 Difference]: Without dead ends: 10379 [2023-11-26 11:53:38,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 551 GetRequests, 549 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 11:53:38,209 INFO L413 NwaCegarLoop]: 481 mSDtfsCounter, 273 mSDsluCounter, 802 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 1283 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:53:38,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 1283 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 11:53:38,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10379 states. [2023-11-26 11:53:39,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10379 to 10377. [2023-11-26 11:53:39,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10377 states, 8724 states have (on average 1.507450710683173) internal successors, (13151), 8764 states have internal predecessors, (13151), 1522 states have call successors, (1522), 130 states have call predecessors, (1522), 130 states have return successors, (1522), 1482 states have call predecessors, (1522), 1522 states have call successors, (1522) [2023-11-26 11:53:39,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10377 states to 10377 states and 16195 transitions. [2023-11-26 11:53:39,144 INFO L78 Accepts]: Start accepts. Automaton has 10377 states and 16195 transitions. Word has length 552 [2023-11-26 11:53:39,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:53:39,145 INFO L495 AbstractCegarLoop]: Abstraction has 10377 states and 16195 transitions. [2023-11-26 11:53:39,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.25) internal successors, (165), 3 states have internal predecessors, (165), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-11-26 11:53:39,146 INFO L276 IsEmpty]: Start isEmpty. Operand 10377 states and 16195 transitions. [2023-11-26 11:53:39,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 553 [2023-11-26 11:53:39,164 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:53:39,164 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:53:39,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:39,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-26 11:53:39,373 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:53:39,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:39,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1133270707, now seen corresponding path program 1 times [2023-11-26 11:53:39,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:39,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513909255] [2023-11-26 11:53:39,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:39,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:39,452 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:53:39,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1262259112] [2023-11-26 11:53:39,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:39,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:39,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:39,454 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:53:39,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad65b040-85bc-4c52-be68-1b255accbf3e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process