./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-44.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/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_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-44.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/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_d018f095-4b8d-440e-ad7a-14ecc485b565/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 220ce7b7c26744c9904e5fd461259f8f4f4bb30e1410a3523238b4cddd16ae20 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 12:03:27,623 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 12:03:27,749 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 12:03:27,757 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 12:03:27,758 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 12:03:27,815 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 12:03:27,815 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 12:03:27,816 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 12:03:27,817 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 12:03:27,822 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 12:03:27,822 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 12:03:27,823 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 12:03:27,823 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 12:03:27,825 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 12:03:27,825 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 12:03:27,826 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 12:03:27,826 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 12:03:27,827 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 12:03:27,827 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 12:03:27,827 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 12:03:27,828 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 12:03:27,828 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 12:03:27,829 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 12:03:27,829 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 12:03:27,829 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 12:03:27,830 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 12:03:27,830 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 12:03:27,831 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 12:03:27,832 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 12:03:27,840 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 12:03:27,841 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 12:03:27,841 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 12:03:27,841 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 12:03:27,842 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 12:03:27,842 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 12:03:27,842 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 12:03:27,842 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 12:03:27,843 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 12:03:27,843 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 12:03:27,843 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 12:03:27,843 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 12:03:27,843 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 12:03:27,844 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_d018f095-4b8d-440e-ad7a-14ecc485b565/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 220ce7b7c26744c9904e5fd461259f8f4f4bb30e1410a3523238b4cddd16ae20 [2023-11-26 12:03:28,191 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 12:03:28,220 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 12:03:28,222 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 12:03:28,224 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 12:03:28,224 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 12:03:28,226 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-44.i [2023-11-26 12:03:31,337 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 12:03:31,738 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 12:03:31,739 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-44.i [2023-11-26 12:03:31,768 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/data/b02246c88/86008432a8244e2699994b1d5236fcb7/FLAG9d12a501e [2023-11-26 12:03:31,787 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/data/b02246c88/86008432a8244e2699994b1d5236fcb7 [2023-11-26 12:03:31,789 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 12:03:31,795 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 12:03:31,799 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 12:03:31,799 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 12:03:31,805 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 12:03:31,806 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:03:31" (1/1) ... [2023-11-26 12:03:31,807 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2062d5ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:31, skipping insertion in model container [2023-11-26 12:03:31,807 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:03:31" (1/1) ... [2023-11-26 12:03:31,881 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 12:03:32,052 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_d018f095-4b8d-440e-ad7a-14ecc485b565/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-44.i[916,929] [2023-11-26 12:03:32,339 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 12:03:32,381 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 12:03:32,393 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_d018f095-4b8d-440e-ad7a-14ecc485b565/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-44.i[916,929] [2023-11-26 12:03:32,551 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 12:03:32,573 INFO L206 MainTranslator]: Completed translation [2023-11-26 12:03:32,574 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:32 WrapperNode [2023-11-26 12:03:32,574 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 12:03:32,575 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 12:03:32,575 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 12:03:32,576 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 12:03:32,586 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:32" (1/1) ... [2023-11-26 12:03:32,632 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:32" (1/1) ... [2023-11-26 12:03:32,750 INFO L138 Inliner]: procedures = 26, calls = 64, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 736 [2023-11-26 12:03:32,750 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 12:03:32,751 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 12:03:32,751 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 12:03:32,752 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 12:03:32,773 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:32" (1/1) ... [2023-11-26 12:03:32,773 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:32" (1/1) ... [2023-11-26 12:03:32,793 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:32" (1/1) ... [2023-11-26 12:03:32,869 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 12:03:32,870 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:32" (1/1) ... [2023-11-26 12:03:32,892 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:32" (1/1) ... [2023-11-26 12:03:32,948 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:32" (1/1) ... [2023-11-26 12:03:32,956 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:32" (1/1) ... [2023-11-26 12:03:32,992 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:32" (1/1) ... [2023-11-26 12:03:33,015 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:32" (1/1) ... [2023-11-26 12:03:33,032 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 12:03:33,033 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 12:03:33,034 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 12:03:33,034 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 12:03:33,034 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:32" (1/1) ... [2023-11-26 12:03:33,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 12:03:33,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:03:33,072 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 12:03:33,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 12:03:33,116 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 12:03:33,116 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-26 12:03:33,117 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-26 12:03:33,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 12:03:33,118 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 12:03:33,118 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 12:03:33,296 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 12:03:33,298 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 12:03:34,740 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 12:03:34,861 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 12:03:34,862 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 12:03:34,862 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:03:34 BoogieIcfgContainer [2023-11-26 12:03:34,863 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 12:03:34,865 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 12:03:34,865 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 12:03:34,869 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 12:03:34,869 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:03:31" (1/3) ... [2023-11-26 12:03:34,870 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4646211f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:03:34, skipping insertion in model container [2023-11-26 12:03:34,871 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:32" (2/3) ... [2023-11-26 12:03:34,872 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4646211f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:03:34, skipping insertion in model container [2023-11-26 12:03:34,873 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:03:34" (3/3) ... [2023-11-26 12:03:34,877 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount500_file-44.i [2023-11-26 12:03:34,896 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 12:03:34,897 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 12:03:34,966 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 12:03:34,975 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;@fe5e747, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 12:03:34,975 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 12:03:34,983 INFO L276 IsEmpty]: Start isEmpty. Operand has 267 states, 213 states have (on average 1.6338028169014085) internal successors, (348), 214 states have internal predecessors, (348), 51 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2023-11-26 12:03:35,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2023-11-26 12:03:35,037 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:03:35,038 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:03:35,039 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:03:35,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:03:35,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1549695900, now seen corresponding path program 1 times [2023-11-26 12:03:35,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:03:35,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824328094] [2023-11-26 12:03:35,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:35,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:03:35,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:35,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:03:35,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824328094] [2023-11-26 12:03:35,521 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-26 12:03:35,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471573524] [2023-11-26 12:03:35,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:35,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:03:35,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:03:35,525 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:03:35,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 12:03:35,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:35,979 INFO L262 TraceCheckSpWp]: Trace formula consists of 1054 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-26 12:03:36,003 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:03:36,075 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 5000 trivial. 0 not checked. [2023-11-26 12:03:36,075 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 12:03:36,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471573524] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:03:36,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:03:36,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 12:03:36,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866267853] [2023-11-26 12:03:36,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:03:36,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 12:03:36,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:03:36,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 12:03:36,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 12:03:36,132 INFO L87 Difference]: Start difference. First operand has 267 states, 213 states have (on average 1.6338028169014085) internal successors, (348), 214 states have internal predecessors, (348), 51 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) Second operand has 2 states, 2 states have (on average 59.5) internal successors, (119), 2 states have internal predecessors, (119), 2 states have call successors, (51), 2 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 2 states have call successors, (51) [2023-11-26 12:03:36,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:03:36,242 INFO L93 Difference]: Finished difference Result 525 states and 938 transitions. [2023-11-26 12:03:36,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 12:03:36,246 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 59.5) internal successors, (119), 2 states have internal predecessors, (119), 2 states have call successors, (51), 2 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 2 states have call successors, (51) Word has length 369 [2023-11-26 12:03:36,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:03:36,257 INFO L225 Difference]: With dead ends: 525 [2023-11-26 12:03:36,257 INFO L226 Difference]: Without dead ends: 259 [2023-11-26 12:03:36,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 368 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 12:03:36,267 INFO L413 NwaCegarLoop]: 429 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, 429 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 12:03:36,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 429 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 12:03:36,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2023-11-26 12:03:36,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2023-11-26 12:03:36,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 206 states have (on average 1.6019417475728155) internal successors, (330), 206 states have internal predecessors, (330), 51 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2023-11-26 12:03:36,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 432 transitions. [2023-11-26 12:03:36,361 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 432 transitions. Word has length 369 [2023-11-26 12:03:36,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:03:36,362 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 432 transitions. [2023-11-26 12:03:36,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 59.5) internal successors, (119), 2 states have internal predecessors, (119), 2 states have call successors, (51), 2 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 2 states have call successors, (51) [2023-11-26 12:03:36,365 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 432 transitions. [2023-11-26 12:03:36,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2023-11-26 12:03:36,376 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:03:36,377 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:03:36,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 12:03:36,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:03:36,584 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:03:36,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:03:36,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1886104034, now seen corresponding path program 1 times [2023-11-26 12:03:36,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:03:36,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215057133] [2023-11-26 12:03:36,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:36,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:03:36,779 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:03:36,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [634547770] [2023-11-26 12:03:36,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:36,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:03:36,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:03:36,787 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:03:36,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 12:03:37,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:37,201 INFO L262 TraceCheckSpWp]: Trace formula consists of 1054 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 12:03:37,213 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:03:37,298 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5100 trivial. 0 not checked. [2023-11-26 12:03:37,299 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 12:03:37,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:03:37,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215057133] [2023-11-26 12:03:37,300 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:03:37,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634547770] [2023-11-26 12:03:37,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634547770] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:03:37,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:03:37,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 12:03:37,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183772830] [2023-11-26 12:03:37,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:03:37,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:03:37,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:03:37,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:03:37,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:03:37,309 INFO L87 Difference]: Start difference. First operand 259 states and 432 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2023-11-26 12:03:37,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:03:37,496 INFO L93 Difference]: Finished difference Result 706 states and 1178 transitions. [2023-11-26 12:03:37,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 12:03:37,497 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) Word has length 369 [2023-11-26 12:03:37,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:03:37,510 INFO L225 Difference]: With dead ends: 706 [2023-11-26 12:03:37,510 INFO L226 Difference]: Without dead ends: 448 [2023-11-26 12:03:37,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 367 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 12:03:37,516 INFO L413 NwaCegarLoop]: 450 mSDtfsCounter, 312 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 855 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 12:03:37,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 855 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 12:03:37,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2023-11-26 12:03:37,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 445. [2023-11-26 12:03:37,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 380 states have (on average 1.6263157894736842) internal successors, (618), 381 states have internal predecessors, (618), 62 states have call successors, (62), 2 states have call predecessors, (62), 2 states have return successors, (62), 61 states have call predecessors, (62), 62 states have call successors, (62) [2023-11-26 12:03:37,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 742 transitions. [2023-11-26 12:03:37,583 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 742 transitions. Word has length 369 [2023-11-26 12:03:37,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:03:37,589 INFO L495 AbstractCegarLoop]: Abstraction has 445 states and 742 transitions. [2023-11-26 12:03:37,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2023-11-26 12:03:37,590 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 742 transitions. [2023-11-26 12:03:37,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2023-11-26 12:03:37,600 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:03:37,600 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:03:37,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 12:03:37,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:03:37,810 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:03:37,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:03:37,811 INFO L85 PathProgramCache]: Analyzing trace with hash -661279078, now seen corresponding path program 1 times [2023-11-26 12:03:37,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:03:37,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849877312] [2023-11-26 12:03:37,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:37,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:03:37,977 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:03:37,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [22341676] [2023-11-26 12:03:37,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:37,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:03:37,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:03:37,987 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:03:38,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 12:03:38,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:38,424 INFO L262 TraceCheckSpWp]: Trace formula consists of 1052 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 12:03:38,433 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:03:38,470 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5100 trivial. 0 not checked. [2023-11-26 12:03:38,470 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 12:03:38,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:03:38,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849877312] [2023-11-26 12:03:38,471 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:03:38,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22341676] [2023-11-26 12:03:38,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22341676] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:03:38,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:03:38,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 12:03:38,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144743671] [2023-11-26 12:03:38,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:03:38,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:03:38,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:03:38,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:03:38,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:03:38,475 INFO L87 Difference]: Start difference. First operand 445 states and 742 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2023-11-26 12:03:38,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:03:38,572 INFO L93 Difference]: Finished difference Result 1331 states and 2220 transitions. [2023-11-26 12:03:38,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 12:03:38,574 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) Word has length 369 [2023-11-26 12:03:38,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:03:38,583 INFO L225 Difference]: With dead ends: 1331 [2023-11-26 12:03:38,584 INFO L226 Difference]: Without dead ends: 887 [2023-11-26 12:03:38,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 367 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 12:03:38,587 INFO L413 NwaCegarLoop]: 613 mSDtfsCounter, 424 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 1034 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 12:03:38,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [424 Valid, 1034 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 12:03:38,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 887 states. [2023-11-26 12:03:38,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 887 to 479. [2023-11-26 12:03:38,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 414 states have (on average 1.6207729468599035) internal successors, (671), 415 states have internal predecessors, (671), 62 states have call successors, (62), 2 states have call predecessors, (62), 2 states have return successors, (62), 61 states have call predecessors, (62), 62 states have call successors, (62) [2023-11-26 12:03:38,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 795 transitions. [2023-11-26 12:03:38,642 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 795 transitions. Word has length 369 [2023-11-26 12:03:38,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:03:38,644 INFO L495 AbstractCegarLoop]: Abstraction has 479 states and 795 transitions. [2023-11-26 12:03:38,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2023-11-26 12:03:38,644 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 795 transitions. [2023-11-26 12:03:38,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2023-11-26 12:03:38,653 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:03:38,654 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:03:38,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 12:03:38,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-26 12:03:38,876 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:03:38,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:03:38,877 INFO L85 PathProgramCache]: Analyzing trace with hash -634775010, now seen corresponding path program 1 times [2023-11-26 12:03:38,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:03:38,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059858308] [2023-11-26 12:03:38,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:38,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:03:38,971 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:03:38,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1996851003] [2023-11-26 12:03:38,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:38,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:03:38,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:03:38,973 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:03:39,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 12:03:39,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:39,470 INFO L262 TraceCheckSpWp]: Trace formula consists of 1054 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 12:03:39,481 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:03:39,522 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5100 trivial. 0 not checked. [2023-11-26 12:03:39,523 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 12:03:39,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:03:39,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059858308] [2023-11-26 12:03:39,523 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:03:39,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996851003] [2023-11-26 12:03:39,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996851003] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:03:39,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:03:39,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 12:03:39,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622805900] [2023-11-26 12:03:39,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:03:39,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:03:39,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:03:39,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:03:39,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:03:39,529 INFO L87 Difference]: Start difference. First operand 479 states and 795 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2023-11-26 12:03:39,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:03:39,652 INFO L93 Difference]: Finished difference Result 1395 states and 2317 transitions. [2023-11-26 12:03:39,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 12:03:39,653 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) Word has length 369 [2023-11-26 12:03:39,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:03:39,666 INFO L225 Difference]: With dead ends: 1395 [2023-11-26 12:03:39,666 INFO L226 Difference]: Without dead ends: 917 [2023-11-26 12:03:39,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 367 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 12:03:39,671 INFO L413 NwaCegarLoop]: 637 mSDtfsCounter, 399 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 1059 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 12:03:39,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [399 Valid, 1059 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 12:03:39,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 917 states. [2023-11-26 12:03:39,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 917 to 487. [2023-11-26 12:03:39,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 422 states have (on average 1.6184834123222749) internal successors, (683), 423 states have internal predecessors, (683), 62 states have call successors, (62), 2 states have call predecessors, (62), 2 states have return successors, (62), 61 states have call predecessors, (62), 62 states have call successors, (62) [2023-11-26 12:03:39,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 807 transitions. [2023-11-26 12:03:39,737 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 807 transitions. Word has length 369 [2023-11-26 12:03:39,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:03:39,743 INFO L495 AbstractCegarLoop]: Abstraction has 487 states and 807 transitions. [2023-11-26 12:03:39,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2023-11-26 12:03:39,743 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 807 transitions. [2023-11-26 12:03:39,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2023-11-26 12:03:39,752 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:03:39,753 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:03:39,771 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-26 12:03:39,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:03:39,962 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:03:39,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:03:39,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1058421732, now seen corresponding path program 1 times [2023-11-26 12:03:39,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:03:39,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093797005] [2023-11-26 12:03:39,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:39,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:03:40,049 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:03:40,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1318962203] [2023-11-26 12:03:40,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:40,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:03:40,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:03:40,052 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:03:40,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 12:03:40,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:40,497 INFO L262 TraceCheckSpWp]: Trace formula consists of 1053 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 12:03:40,505 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:03:40,566 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5100 trivial. 0 not checked. [2023-11-26 12:03:40,569 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 12:03:40,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:03:40,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093797005] [2023-11-26 12:03:40,571 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:03:40,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318962203] [2023-11-26 12:03:40,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318962203] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:03:40,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:03:40,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 12:03:40,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634736127] [2023-11-26 12:03:40,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:03:40,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:03:40,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:03:40,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:03:40,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:03:40,580 INFO L87 Difference]: Start difference. First operand 487 states and 807 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2023-11-26 12:03:44,681 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-26 12:03:44,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:03:44,724 INFO L93 Difference]: Finished difference Result 1447 states and 2395 transitions. [2023-11-26 12:03:44,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 12:03:44,725 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) Word has length 369 [2023-11-26 12:03:44,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:03:44,733 INFO L225 Difference]: With dead ends: 1447 [2023-11-26 12:03:44,733 INFO L226 Difference]: Without dead ends: 961 [2023-11-26 12:03:44,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 367 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 12:03:44,736 INFO L413 NwaCegarLoop]: 422 mSDtfsCounter, 408 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 828 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-11-26 12:03:44,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [408 Valid, 828 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 23 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2023-11-26 12:03:44,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 961 states. [2023-11-26 12:03:44,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 961 to 577. [2023-11-26 12:03:44,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 512 states have (on average 1.6484375) internal successors, (844), 513 states have internal predecessors, (844), 62 states have call successors, (62), 2 states have call predecessors, (62), 2 states have return successors, (62), 61 states have call predecessors, (62), 62 states have call successors, (62) [2023-11-26 12:03:44,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 968 transitions. [2023-11-26 12:03:44,786 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 968 transitions. Word has length 369 [2023-11-26 12:03:44,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:03:44,787 INFO L495 AbstractCegarLoop]: Abstraction has 577 states and 968 transitions. [2023-11-26 12:03:44,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2023-11-26 12:03:44,788 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 968 transitions. [2023-11-26 12:03:44,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2023-11-26 12:03:44,792 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:03:44,792 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:03:44,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 12:03:45,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:03:45,001 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:03:45,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:03:45,002 INFO L85 PathProgramCache]: Analyzing trace with hash 795027270, now seen corresponding path program 1 times [2023-11-26 12:03:45,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:03:45,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86264450] [2023-11-26 12:03:45,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:45,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:03:45,095 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:03:45,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [865951461] [2023-11-26 12:03:45,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:45,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:03:45,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:03:45,097 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:03:45,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 12:03:45,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:45,518 INFO L262 TraceCheckSpWp]: Trace formula consists of 1057 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 12:03:45,527 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:03:45,601 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5100 trivial. 0 not checked. [2023-11-26 12:03:45,601 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 12:03:45,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:03:45,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86264450] [2023-11-26 12:03:45,602 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:03:45,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865951461] [2023-11-26 12:03:45,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865951461] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:03:45,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:03:45,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 12:03:45,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480404389] [2023-11-26 12:03:45,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:03:45,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:03:45,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:03:45,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:03:45,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:03:45,606 INFO L87 Difference]: Start difference. First operand 577 states and 968 transitions. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2023-11-26 12:03:45,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:03:45,815 INFO L93 Difference]: Finished difference Result 1379 states and 2314 transitions. [2023-11-26 12:03:45,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 12:03:45,816 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) Word has length 370 [2023-11-26 12:03:45,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:03:45,822 INFO L225 Difference]: With dead ends: 1379 [2023-11-26 12:03:45,822 INFO L226 Difference]: Without dead ends: 803 [2023-11-26 12:03:45,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 368 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 12:03:45,825 INFO L413 NwaCegarLoop]: 464 mSDtfsCounter, 137 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 873 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 12:03:45,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 873 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 12:03:45,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2023-11-26 12:03:45,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 675. [2023-11-26 12:03:45,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 610 states have (on average 1.6688524590163933) internal successors, (1018), 611 states have internal predecessors, (1018), 62 states have call successors, (62), 2 states have call predecessors, (62), 2 states have return successors, (62), 61 states have call predecessors, (62), 62 states have call successors, (62) [2023-11-26 12:03:45,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 1142 transitions. [2023-11-26 12:03:45,861 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 1142 transitions. Word has length 370 [2023-11-26 12:03:45,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:03:45,862 INFO L495 AbstractCegarLoop]: Abstraction has 675 states and 1142 transitions. [2023-11-26 12:03:45,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2023-11-26 12:03:45,863 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 1142 transitions. [2023-11-26 12:03:45,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2023-11-26 12:03:45,867 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:03:45,867 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:03:45,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 12:03:46,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:03:46,077 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:03:46,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:03:46,078 INFO L85 PathProgramCache]: Analyzing trace with hash -793320632, now seen corresponding path program 1 times [2023-11-26 12:03:46,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:03:46,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368812631] [2023-11-26 12:03:46,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:46,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:03:46,170 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:03:46,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1322717708] [2023-11-26 12:03:46,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:46,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:03:46,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:03:46,172 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:03:46,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 12:03:46,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:46,638 INFO L262 TraceCheckSpWp]: Trace formula consists of 1058 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 12:03:46,660 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:03:46,720 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5100 trivial. 0 not checked. [2023-11-26 12:03:46,721 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 12:03:46,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:03:46,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368812631] [2023-11-26 12:03:46,721 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:03:46,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322717708] [2023-11-26 12:03:46,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322717708] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:03:46,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:03:46,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 12:03:46,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125354512] [2023-11-26 12:03:46,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:03:46,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 12:03:46,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:03:46,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 12:03:46,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 12:03:46,730 INFO L87 Difference]: Start difference. First operand 675 states and 1142 transitions. Second operand has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2023-11-26 12:03:47,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:03:47,072 INFO L93 Difference]: Finished difference Result 2995 states and 5068 transitions. [2023-11-26 12:03:47,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 12:03:47,073 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) Word has length 370 [2023-11-26 12:03:47,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:03:47,089 INFO L225 Difference]: With dead ends: 2995 [2023-11-26 12:03:47,090 INFO L226 Difference]: Without dead ends: 2321 [2023-11-26 12:03:47,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 368 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 12:03:47,092 INFO L413 NwaCegarLoop]: 450 mSDtfsCounter, 1081 mSDsluCounter, 1035 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1081 SdHoareTripleChecker+Valid, 1485 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 12:03:47,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1081 Valid, 1485 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 12:03:47,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2321 states. [2023-11-26 12:03:47,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2321 to 1233. [2023-11-26 12:03:47,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1233 states, 1158 states have (on average 1.6683937823834196) internal successors, (1932), 1161 states have internal predecessors, (1932), 70 states have call successors, (70), 4 states have call predecessors, (70), 4 states have return successors, (70), 67 states have call predecessors, (70), 70 states have call successors, (70) [2023-11-26 12:03:47,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1233 states to 1233 states and 2072 transitions. [2023-11-26 12:03:47,164 INFO L78 Accepts]: Start accepts. Automaton has 1233 states and 2072 transitions. Word has length 370 [2023-11-26 12:03:47,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:03:47,165 INFO L495 AbstractCegarLoop]: Abstraction has 1233 states and 2072 transitions. [2023-11-26 12:03:47,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2023-11-26 12:03:47,166 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states and 2072 transitions. [2023-11-26 12:03:47,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2023-11-26 12:03:47,172 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:03:47,172 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:03:47,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 12:03:47,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:03:47,382 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:03:47,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:03:47,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1383098564, now seen corresponding path program 1 times [2023-11-26 12:03:47,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:03:47,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258549539] [2023-11-26 12:03:47,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:47,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:03:47,487 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:03:47,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1406375457] [2023-11-26 12:03:47,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:47,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:03:47,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:03:47,494 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:03:47,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 12:03:47,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:47,954 INFO L262 TraceCheckSpWp]: Trace formula consists of 1060 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 12:03:47,964 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:03:48,722 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 50 proven. 150 refuted. 0 times theorem prover too weak. 4900 trivial. 0 not checked. [2023-11-26 12:03:48,722 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:03:49,242 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 4950 trivial. 0 not checked. [2023-11-26 12:03:49,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:03:49,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258549539] [2023-11-26 12:03:49,243 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:03:49,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406375457] [2023-11-26 12:03:49,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406375457] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:03:49,243 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 12:03:49,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-26 12:03:49,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037156811] [2023-11-26 12:03:49,244 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 12:03:49,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 12:03:49,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:03:49,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 12:03:49,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 12:03:49,247 INFO L87 Difference]: Start difference. First operand 1233 states and 2072 transitions. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 2 states have call successors, (101), 2 states have call predecessors, (101), 4 states have return successors, (102), 1 states have call predecessors, (102), 2 states have call successors, (102) [2023-11-26 12:03:49,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:03:49,778 INFO L93 Difference]: Finished difference Result 2293 states and 3815 transitions. [2023-11-26 12:03:49,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 12:03:49,780 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 2 states have call successors, (101), 2 states have call predecessors, (101), 4 states have return successors, (102), 1 states have call predecessors, (102), 2 states have call successors, (102) Word has length 370 [2023-11-26 12:03:49,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:03:49,788 INFO L225 Difference]: With dead ends: 2293 [2023-11-26 12:03:49,788 INFO L226 Difference]: Without dead ends: 1061 [2023-11-26 12:03:49,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 742 GetRequests, 732 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-26 12:03:49,793 INFO L413 NwaCegarLoop]: 361 mSDtfsCounter, 693 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 693 SdHoareTripleChecker+Valid, 974 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 12:03:49,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [693 Valid, 974 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 12:03:49,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1061 states. [2023-11-26 12:03:49,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1061 to 1053. [2023-11-26 12:03:49,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1053 states, 974 states have (on average 1.6180698151950719) internal successors, (1576), 977 states have internal predecessors, (1576), 70 states have call successors, (70), 8 states have call predecessors, (70), 8 states have return successors, (70), 67 states have call predecessors, (70), 70 states have call successors, (70) [2023-11-26 12:03:49,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1053 states to 1053 states and 1716 transitions. [2023-11-26 12:03:49,850 INFO L78 Accepts]: Start accepts. Automaton has 1053 states and 1716 transitions. Word has length 370 [2023-11-26 12:03:49,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:03:49,851 INFO L495 AbstractCegarLoop]: Abstraction has 1053 states and 1716 transitions. [2023-11-26 12:03:49,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 2 states have call successors, (101), 2 states have call predecessors, (101), 4 states have return successors, (102), 1 states have call predecessors, (102), 2 states have call successors, (102) [2023-11-26 12:03:49,851 INFO L276 IsEmpty]: Start isEmpty. Operand 1053 states and 1716 transitions. [2023-11-26 12:03:49,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2023-11-26 12:03:49,856 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:03:49,857 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:03:49,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 12:03:50,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:03:50,066 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:03:50,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:03:50,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1752153599, now seen corresponding path program 1 times [2023-11-26 12:03:50,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:03:50,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880828689] [2023-11-26 12:03:50,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:50,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:03:50,146 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:03:50,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [563507620] [2023-11-26 12:03:50,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:50,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:03:50,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:03:50,157 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:03:50,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 12:03:50,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:50,684 INFO L262 TraceCheckSpWp]: Trace formula consists of 1054 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 12:03:50,699 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:03:51,282 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 794 proven. 138 refuted. 0 times theorem prover too weak. 4168 trivial. 0 not checked. [2023-11-26 12:03:51,282 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:03:51,720 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 12 proven. 138 refuted. 0 times theorem prover too weak. 4950 trivial. 0 not checked. [2023-11-26 12:03:51,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:03:51,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880828689] [2023-11-26 12:03:51,720 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:03:51,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563507620] [2023-11-26 12:03:51,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563507620] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:03:51,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 12:03:51,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-26 12:03:51,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605158294] [2023-11-26 12:03:51,722 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 12:03:51,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 12:03:51,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:03:51,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 12:03:51,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 12:03:51,725 INFO L87 Difference]: Start difference. First operand 1053 states and 1716 transitions. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 2 states have call successors, (97), 2 states have call predecessors, (97), 4 states have return successors, (98), 2 states have call predecessors, (98), 2 states have call successors, (98) [2023-11-26 12:03:52,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:03:52,254 INFO L93 Difference]: Finished difference Result 1666 states and 2706 transitions. [2023-11-26 12:03:52,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 12:03:52,255 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 2 states have call successors, (97), 2 states have call predecessors, (97), 4 states have return successors, (98), 2 states have call predecessors, (98), 2 states have call successors, (98) Word has length 370 [2023-11-26 12:03:52,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:03:52,260 INFO L225 Difference]: With dead ends: 1666 [2023-11-26 12:03:52,260 INFO L226 Difference]: Without dead ends: 614 [2023-11-26 12:03:52,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 742 GetRequests, 732 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-26 12:03:52,263 INFO L413 NwaCegarLoop]: 364 mSDtfsCounter, 275 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 979 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 12:03:52,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 979 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 12:03:52,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2023-11-26 12:03:52,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 607. [2023-11-26 12:03:52,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 532 states have (on average 1.586466165413534) internal successors, (844), 534 states have internal predecessors, (844), 66 states have call successors, (66), 8 states have call predecessors, (66), 8 states have return successors, (66), 64 states have call predecessors, (66), 66 states have call successors, (66) [2023-11-26 12:03:52,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 976 transitions. [2023-11-26 12:03:52,300 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 976 transitions. Word has length 370 [2023-11-26 12:03:52,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:03:52,301 INFO L495 AbstractCegarLoop]: Abstraction has 607 states and 976 transitions. [2023-11-26 12:03:52,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 2 states have call successors, (97), 2 states have call predecessors, (97), 4 states have return successors, (98), 2 states have call predecessors, (98), 2 states have call successors, (98) [2023-11-26 12:03:52,302 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 976 transitions. [2023-11-26 12:03:52,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2023-11-26 12:03:52,306 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:03:52,306 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:03:52,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 12:03:52,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:03:52,516 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:03:52,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:03:52,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1212050055, now seen corresponding path program 1 times [2023-11-26 12:03:52,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:03:52,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075472679] [2023-11-26 12:03:52,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:52,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:03:52,618 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:03:52,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1436576428] [2023-11-26 12:03:52,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:52,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:03:52,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:03:52,623 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:03:52,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 12:03:53,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:53,106 INFO L262 TraceCheckSpWp]: Trace formula consists of 1052 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 12:03:53,115 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:03:53,591 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 2580 proven. 81 refuted. 0 times theorem prover too weak. 2439 trivial. 0 not checked. [2023-11-26 12:03:53,591 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:03:54,038 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 69 proven. 81 refuted. 0 times theorem prover too weak. 4950 trivial. 0 not checked. [2023-11-26 12:03:54,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:03:54,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075472679] [2023-11-26 12:03:54,038 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:03:54,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436576428] [2023-11-26 12:03:54,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436576428] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:03:54,039 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 12:03:54,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-26 12:03:54,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121317593] [2023-11-26 12:03:54,040 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 12:03:54,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 12:03:54,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:03:54,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 12:03:54,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-26 12:03:54,044 INFO L87 Difference]: Start difference. First operand 607 states and 976 transitions. Second operand has 8 states, 8 states have (on average 26.625) internal successors, (213), 8 states have internal predecessors, (213), 3 states have call successors, (78), 2 states have call predecessors, (78), 4 states have return successors, (79), 3 states have call predecessors, (79), 3 states have call successors, (79) [2023-11-26 12:03:54,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:03:54,600 INFO L93 Difference]: Finished difference Result 1209 states and 1944 transitions. [2023-11-26 12:03:54,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 12:03:54,601 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 26.625) internal successors, (213), 8 states have internal predecessors, (213), 3 states have call successors, (78), 2 states have call predecessors, (78), 4 states have return successors, (79), 3 states have call predecessors, (79), 3 states have call successors, (79) Word has length 371 [2023-11-26 12:03:54,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:03:54,606 INFO L225 Difference]: With dead ends: 1209 [2023-11-26 12:03:54,607 INFO L226 Difference]: Without dead ends: 617 [2023-11-26 12:03:54,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 744 GetRequests, 734 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-26 12:03:54,609 INFO L413 NwaCegarLoop]: 349 mSDtfsCounter, 496 mSDsluCounter, 593 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 519 SdHoareTripleChecker+Valid, 942 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 12:03:54,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [519 Valid, 942 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 12:03:54,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2023-11-26 12:03:54,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 611. [2023-11-26 12:03:54,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 611 states, 535 states have (on average 1.5794392523364487) internal successors, (845), 537 states have internal predecessors, (845), 66 states have call successors, (66), 9 states have call predecessors, (66), 9 states have return successors, (66), 64 states have call predecessors, (66), 66 states have call successors, (66) [2023-11-26 12:03:54,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 977 transitions. [2023-11-26 12:03:54,647 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 977 transitions. Word has length 371 [2023-11-26 12:03:54,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:03:54,648 INFO L495 AbstractCegarLoop]: Abstraction has 611 states and 977 transitions. [2023-11-26 12:03:54,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 26.625) internal successors, (213), 8 states have internal predecessors, (213), 3 states have call successors, (78), 2 states have call predecessors, (78), 4 states have return successors, (79), 3 states have call predecessors, (79), 3 states have call successors, (79) [2023-11-26 12:03:54,648 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 977 transitions. [2023-11-26 12:03:54,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2023-11-26 12:03:54,652 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:03:54,652 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:03:54,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-26 12:03:54,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-26 12:03:54,870 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:03:54,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:03:54,871 INFO L85 PathProgramCache]: Analyzing trace with hash 200932805, now seen corresponding path program 1 times [2023-11-26 12:03:54,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:03:54,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879515994] [2023-11-26 12:03:54,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:54,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:03:55,008 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:03:55,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [879259669] [2023-11-26 12:03:55,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:55,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:03:55,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:03:55,010 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:03:55,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-26 12:03:55,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:55,477 INFO L262 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-26 12:03:55,487 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:03:55,947 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5100 trivial. 0 not checked. [2023-11-26 12:03:55,948 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 12:03:55,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:03:55,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879515994] [2023-11-26 12:03:55,948 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:03:55,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879259669] [2023-11-26 12:03:55,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879259669] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:03:55,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:03:55,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 12:03:55,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082887926] [2023-11-26 12:03:55,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:03:55,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 12:03:55,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:03:55,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 12:03:55,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-26 12:03:55,952 INFO L87 Difference]: Start difference. First operand 611 states and 977 transitions. Second operand has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 6 states have internal predecessors, (119), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2023-11-26 12:03:56,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:03:56,622 INFO L93 Difference]: Finished difference Result 1758 states and 2845 transitions. [2023-11-26 12:03:56,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 12:03:56,623 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 6 states have internal predecessors, (119), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) Word has length 371 [2023-11-26 12:03:56,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:03:56,634 INFO L225 Difference]: With dead ends: 1758 [2023-11-26 12:03:56,634 INFO L226 Difference]: Without dead ends: 1158 [2023-11-26 12:03:56,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-11-26 12:03:56,636 INFO L413 NwaCegarLoop]: 562 mSDtfsCounter, 1428 mSDsluCounter, 1297 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1428 SdHoareTripleChecker+Valid, 1859 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 12:03:56,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1428 Valid, 1859 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 12:03:56,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1158 states. [2023-11-26 12:03:56,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1158 to 734. [2023-11-26 12:03:56,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 658 states have (on average 1.5972644376899696) internal successors, (1051), 660 states have internal predecessors, (1051), 66 states have call successors, (66), 9 states have call predecessors, (66), 9 states have return successors, (66), 64 states have call predecessors, (66), 66 states have call successors, (66) [2023-11-26 12:03:56,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 1183 transitions. [2023-11-26 12:03:56,689 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 1183 transitions. Word has length 371 [2023-11-26 12:03:56,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:03:56,690 INFO L495 AbstractCegarLoop]: Abstraction has 734 states and 1183 transitions. [2023-11-26 12:03:56,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 6 states have internal predecessors, (119), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2023-11-26 12:03:56,690 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 1183 transitions. [2023-11-26 12:03:56,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2023-11-26 12:03:56,695 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:03:56,695 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:03:56,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-26 12:03:56,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-26 12:03:56,905 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:03:56,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:03:56,906 INFO L85 PathProgramCache]: Analyzing trace with hash 57153479, now seen corresponding path program 1 times [2023-11-26 12:03:56,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:03:56,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935950278] [2023-11-26 12:03:56,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:56,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:03:56,981 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:03:56,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [761781806] [2023-11-26 12:03:56,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:56,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:03:56,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:03:56,983 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:03:57,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-26 12:03:57,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:57,457 INFO L262 TraceCheckSpWp]: Trace formula consists of 1049 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 12:03:57,467 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:03:57,868 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 2600 proven. 75 refuted. 0 times theorem prover too weak. 2425 trivial. 0 not checked. [2023-11-26 12:03:57,868 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:03:58,223 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 75 proven. 75 refuted. 0 times theorem prover too weak. 4950 trivial. 0 not checked. [2023-11-26 12:03:58,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:03:58,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935950278] [2023-11-26 12:03:58,224 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:03:58,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761781806] [2023-11-26 12:03:58,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761781806] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:03:58,224 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 12:03:58,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-26 12:03:58,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785070143] [2023-11-26 12:03:58,225 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 12:03:58,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 12:03:58,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:03:58,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 12:03:58,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-26 12:03:58,229 INFO L87 Difference]: Start difference. First operand 734 states and 1183 transitions. Second operand has 10 states, 10 states have (on average 19.4) internal successors, (194), 10 states have internal predecessors, (194), 3 states have call successors, (76), 2 states have call predecessors, (76), 4 states have return successors, (77), 3 states have call predecessors, (77), 3 states have call successors, (77) [2023-11-26 12:03:59,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:03:59,452 INFO L93 Difference]: Finished difference Result 2190 states and 3531 transitions. [2023-11-26 12:03:59,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-26 12:03:59,453 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 19.4) internal successors, (194), 10 states have internal predecessors, (194), 3 states have call successors, (76), 2 states have call predecessors, (76), 4 states have return successors, (77), 3 states have call predecessors, (77), 3 states have call successors, (77) Word has length 371 [2023-11-26 12:03:59,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:03:59,463 INFO L225 Difference]: With dead ends: 2190 [2023-11-26 12:03:59,463 INFO L226 Difference]: Without dead ends: 1471 [2023-11-26 12:03:59,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 751 GetRequests, 733 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2023-11-26 12:03:59,466 INFO L413 NwaCegarLoop]: 663 mSDtfsCounter, 628 mSDsluCounter, 1778 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 654 SdHoareTripleChecker+Valid, 2441 SdHoareTripleChecker+Invalid, 985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-26 12:03:59,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [654 Valid, 2441 Invalid, 985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 880 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-26 12:03:59,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1471 states. [2023-11-26 12:03:59,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1471 to 1056. [2023-11-26 12:03:59,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1056 states, 979 states have (on average 1.6210418794688457) internal successors, (1587), 981 states have internal predecessors, (1587), 66 states have call successors, (66), 10 states have call predecessors, (66), 10 states have return successors, (66), 64 states have call predecessors, (66), 66 states have call successors, (66) [2023-11-26 12:03:59,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1056 states to 1056 states and 1719 transitions. [2023-11-26 12:03:59,542 INFO L78 Accepts]: Start accepts. Automaton has 1056 states and 1719 transitions. Word has length 371 [2023-11-26 12:03:59,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:03:59,543 INFO L495 AbstractCegarLoop]: Abstraction has 1056 states and 1719 transitions. [2023-11-26 12:03:59,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 19.4) internal successors, (194), 10 states have internal predecessors, (194), 3 states have call successors, (76), 2 states have call predecessors, (76), 4 states have return successors, (77), 3 states have call predecessors, (77), 3 states have call successors, (77) [2023-11-26 12:03:59,543 INFO L276 IsEmpty]: Start isEmpty. Operand 1056 states and 1719 transitions. [2023-11-26 12:03:59,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2023-11-26 12:03:59,548 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:03:59,549 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:03:59,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-26 12:03:59,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-26 12:03:59,759 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:03:59,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:03:59,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1314653819, now seen corresponding path program 1 times [2023-11-26 12:03:59,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:03:59,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186057947] [2023-11-26 12:03:59,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:59,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:03:59,853 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:03:59,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1028522430] [2023-11-26 12:03:59,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:59,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:03:59,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:03:59,856 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:03:59,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-26 12:04:00,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:00,390 INFO L262 TraceCheckSpWp]: Trace formula consists of 1049 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 12:04:00,401 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:04:00,964 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 620 proven. 141 refuted. 0 times theorem prover too weak. 4339 trivial. 0 not checked. [2023-11-26 12:04:00,964 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:04:01,374 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 9 proven. 141 refuted. 0 times theorem prover too weak. 4950 trivial. 0 not checked. [2023-11-26 12:04:01,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:04:01,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186057947] [2023-11-26 12:04:01,374 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:04:01,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028522430] [2023-11-26 12:04:01,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028522430] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:04:01,375 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 12:04:01,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-26 12:04:01,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377741478] [2023-11-26 12:04:01,375 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 12:04:01,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 12:04:01,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:04:01,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 12:04:01,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 12:04:01,378 INFO L87 Difference]: Start difference. First operand 1056 states and 1719 transitions. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 2 states have call successors, (98), 2 states have call predecessors, (98), 4 states have return successors, (99), 2 states have call predecessors, (99), 2 states have call successors, (99) [2023-11-26 12:04:01,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:04:01,820 INFO L93 Difference]: Finished difference Result 2113 states and 3432 transitions. [2023-11-26 12:04:01,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 12:04:01,821 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 2 states have call successors, (98), 2 states have call predecessors, (98), 4 states have return successors, (99), 2 states have call predecessors, (99), 2 states have call successors, (99) Word has length 371 [2023-11-26 12:04:01,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:04:01,829 INFO L225 Difference]: With dead ends: 2113 [2023-11-26 12:04:01,829 INFO L226 Difference]: Without dead ends: 1072 [2023-11-26 12:04:01,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 743 GetRequests, 734 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2023-11-26 12:04:01,832 INFO L413 NwaCegarLoop]: 353 mSDtfsCounter, 507 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 953 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 12:04:01,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [509 Valid, 953 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 12:04:01,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2023-11-26 12:04:01,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 1059. [2023-11-26 12:04:01,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1059 states, 982 states have (on average 1.609979633401222) internal successors, (1581), 984 states have internal predecessors, (1581), 64 states have call successors, (64), 12 states have call predecessors, (64), 12 states have return successors, (64), 62 states have call predecessors, (64), 64 states have call successors, (64) [2023-11-26 12:04:01,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1059 states to 1059 states and 1709 transitions. [2023-11-26 12:04:01,889 INFO L78 Accepts]: Start accepts. Automaton has 1059 states and 1709 transitions. Word has length 371 [2023-11-26 12:04:01,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:04:01,890 INFO L495 AbstractCegarLoop]: Abstraction has 1059 states and 1709 transitions. [2023-11-26 12:04:01,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 2 states have call successors, (98), 2 states have call predecessors, (98), 4 states have return successors, (99), 2 states have call predecessors, (99), 2 states have call successors, (99) [2023-11-26 12:04:01,891 INFO L276 IsEmpty]: Start isEmpty. Operand 1059 states and 1709 transitions. [2023-11-26 12:04:01,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2023-11-26 12:04:01,896 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:04:01,896 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:04:01,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-26 12:04:02,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-26 12:04:02,111 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:04:02,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:04:02,111 INFO L85 PathProgramCache]: Analyzing trace with hash 671742085, now seen corresponding path program 1 times [2023-11-26 12:04:02,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:04:02,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138741834] [2023-11-26 12:04:02,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:04:02,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:04:02,205 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:04:02,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1900021255] [2023-11-26 12:04:02,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:04:02,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:04:02,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:04:02,211 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:04:02,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-26 12:04:02,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:02,709 INFO L262 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 12:04:02,717 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:04:02,818 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5100 trivial. 0 not checked. [2023-11-26 12:04:02,818 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 12:04:02,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:04:02,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138741834] [2023-11-26 12:04:02,819 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:04:02,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900021255] [2023-11-26 12:04:02,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900021255] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:04:02,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:04:02,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 12:04:02,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845116951] [2023-11-26 12:04:02,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:04:02,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 12:04:02,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:04:02,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 12:04:02,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 12:04:02,822 INFO L87 Difference]: Start difference. First operand 1059 states and 1709 transitions. Second operand has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2023-11-26 12:04:03,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:04:03,110 INFO L93 Difference]: Finished difference Result 2106 states and 3404 transitions. [2023-11-26 12:04:03,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 12:04:03,112 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) Word has length 371 [2023-11-26 12:04:03,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:04:03,119 INFO L225 Difference]: With dead ends: 2106 [2023-11-26 12:04:03,120 INFO L226 Difference]: Without dead ends: 1059 [2023-11-26 12:04:03,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 369 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 12:04:03,123 INFO L413 NwaCegarLoop]: 404 mSDtfsCounter, 568 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 568 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 12:04:03,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [568 Valid, 514 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 12:04:03,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1059 states. [2023-11-26 12:04:03,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1059 to 946. [2023-11-26 12:04:03,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 946 states, 871 states have (on average 1.598163030998852) internal successors, (1392), 872 states have internal predecessors, (1392), 62 states have call successors, (62), 12 states have call predecessors, (62), 12 states have return successors, (62), 61 states have call predecessors, (62), 62 states have call successors, (62) [2023-11-26 12:04:03,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 946 states to 946 states and 1516 transitions. [2023-11-26 12:04:03,180 INFO L78 Accepts]: Start accepts. Automaton has 946 states and 1516 transitions. Word has length 371 [2023-11-26 12:04:03,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:04:03,181 INFO L495 AbstractCegarLoop]: Abstraction has 946 states and 1516 transitions. [2023-11-26 12:04:03,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2023-11-26 12:04:03,182 INFO L276 IsEmpty]: Start isEmpty. Operand 946 states and 1516 transitions. [2023-11-26 12:04:03,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2023-11-26 12:04:03,186 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:04:03,187 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:04:03,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-26 12:04:03,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-26 12:04:03,396 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:04:03,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:04:03,397 INFO L85 PathProgramCache]: Analyzing trace with hash -714640592, now seen corresponding path program 1 times [2023-11-26 12:04:03,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:04:03,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638353877] [2023-11-26 12:04:03,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:04:03,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:04:03,464 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:04:03,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1465368496] [2023-11-26 12:04:03,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:04:03,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:04:03,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:04:03,466 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:04:03,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-26 12:04:04,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:04,007 INFO L262 TraceCheckSpWp]: Trace formula consists of 1051 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-26 12:04:04,017 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:04:04,661 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 50 proven. 150 refuted. 0 times theorem prover too weak. 4900 trivial. 0 not checked. [2023-11-26 12:04:04,661 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:04:05,173 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 4950 trivial. 0 not checked. [2023-11-26 12:04:05,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:04:05,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638353877] [2023-11-26 12:04:05,173 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:04:05,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465368496] [2023-11-26 12:04:05,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465368496] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:04:05,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 12:04:05,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2023-11-26 12:04:05,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913182389] [2023-11-26 12:04:05,175 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 12:04:05,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-26 12:04:05,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:04:05,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-26 12:04:05,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2023-11-26 12:04:05,182 INFO L87 Difference]: Start difference. First operand 946 states and 1516 transitions. Second operand has 13 states, 13 states have (on average 11.615384615384615) internal successors, (151), 13 states have internal predecessors, (151), 2 states have call successors, (101), 2 states have call predecessors, (101), 4 states have return successors, (102), 1 states have call predecessors, (102), 2 states have call successors, (102) [2023-11-26 12:04:07,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:04:07,081 INFO L93 Difference]: Finished difference Result 2563 states and 4084 transitions. [2023-11-26 12:04:07,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-26 12:04:07,082 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 11.615384615384615) internal successors, (151), 13 states have internal predecessors, (151), 2 states have call successors, (101), 2 states have call predecessors, (101), 4 states have return successors, (102), 1 states have call predecessors, (102), 2 states have call successors, (102) Word has length 372 [2023-11-26 12:04:07,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:04:07,093 INFO L225 Difference]: With dead ends: 2563 [2023-11-26 12:04:07,094 INFO L226 Difference]: Without dead ends: 1618 [2023-11-26 12:04:07,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 773 GetRequests, 735 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=404, Invalid=1078, Unknown=0, NotChecked=0, Total=1482 [2023-11-26 12:04:07,097 INFO L413 NwaCegarLoop]: 509 mSDtfsCounter, 1573 mSDsluCounter, 2164 mSDsCounter, 0 mSdLazyCounter, 816 mSolverCounterSat, 723 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1574 SdHoareTripleChecker+Valid, 2673 SdHoareTripleChecker+Invalid, 1539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 723 IncrementalHoareTripleChecker+Valid, 816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-26 12:04:07,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1574 Valid, 2673 Invalid, 1539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [723 Valid, 816 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-26 12:04:07,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1618 states. [2023-11-26 12:04:07,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1618 to 805. [2023-11-26 12:04:07,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 805 states, 730 states have (on average 1.5863013698630137) internal successors, (1158), 731 states have internal predecessors, (1158), 62 states have call successors, (62), 12 states have call predecessors, (62), 12 states have return successors, (62), 61 states have call predecessors, (62), 62 states have call successors, (62) [2023-11-26 12:04:07,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 1282 transitions. [2023-11-26 12:04:07,168 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 1282 transitions. Word has length 372 [2023-11-26 12:04:07,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:04:07,168 INFO L495 AbstractCegarLoop]: Abstraction has 805 states and 1282 transitions. [2023-11-26 12:04:07,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 11.615384615384615) internal successors, (151), 13 states have internal predecessors, (151), 2 states have call successors, (101), 2 states have call predecessors, (101), 4 states have return successors, (102), 1 states have call predecessors, (102), 2 states have call successors, (102) [2023-11-26 12:04:07,169 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 1282 transitions. [2023-11-26 12:04:07,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2023-11-26 12:04:07,173 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:04:07,174 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:04:07,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-26 12:04:07,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-26 12:04:07,382 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:04:07,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:04:07,383 INFO L85 PathProgramCache]: Analyzing trace with hash -876832402, now seen corresponding path program 1 times [2023-11-26 12:04:07,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:04:07,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100397974] [2023-11-26 12:04:07,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:04:07,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:04:07,451 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:04:07,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [967614325] [2023-11-26 12:04:07,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:04:07,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:04:07,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:04:07,453 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:04:07,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-26 12:04:08,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:08,009 INFO L262 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-26 12:04:08,018 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:04:08,797 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 50 proven. 150 refuted. 0 times theorem prover too weak. 4900 trivial. 0 not checked. [2023-11-26 12:04:08,798 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:04:09,199 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5100 trivial. 0 not checked. [2023-11-26 12:04:09,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:04:09,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100397974] [2023-11-26 12:04:09,200 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:04:09,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967614325] [2023-11-26 12:04:09,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967614325] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-26 12:04:09,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 12:04:09,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 15 [2023-11-26 12:04:09,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706616846] [2023-11-26 12:04:09,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:04:09,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 12:04:09,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:04:09,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 12:04:09,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2023-11-26 12:04:09,204 INFO L87 Difference]: Start difference. First operand 805 states and 1282 transitions. Second operand has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2023-11-26 12:04:09,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:04:09,615 INFO L93 Difference]: Finished difference Result 2899 states and 4663 transitions. [2023-11-26 12:04:09,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 12:04:09,616 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) Word has length 372 [2023-11-26 12:04:09,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:04:09,629 INFO L225 Difference]: With dead ends: 2899 [2023-11-26 12:04:09,629 INFO L226 Difference]: Without dead ends: 2095 [2023-11-26 12:04:09,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 742 GetRequests, 729 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2023-11-26 12:04:09,633 INFO L413 NwaCegarLoop]: 407 mSDtfsCounter, 762 mSDsluCounter, 929 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 762 SdHoareTripleChecker+Valid, 1336 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 12:04:09,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [762 Valid, 1336 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 12:04:09,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2095 states. [2023-11-26 12:04:09,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2095 to 1607. [2023-11-26 12:04:09,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1607 states, 1458 states have (on average 1.5816186556927299) internal successors, (2306), 1460 states have internal predecessors, (2306), 124 states have call successors, (124), 24 states have call predecessors, (124), 24 states have return successors, (124), 122 states have call predecessors, (124), 124 states have call successors, (124) [2023-11-26 12:04:09,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1607 states to 1607 states and 2554 transitions. [2023-11-26 12:04:09,770 INFO L78 Accepts]: Start accepts. Automaton has 1607 states and 2554 transitions. Word has length 372 [2023-11-26 12:04:09,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:04:09,770 INFO L495 AbstractCegarLoop]: Abstraction has 1607 states and 2554 transitions. [2023-11-26 12:04:09,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2023-11-26 12:04:09,771 INFO L276 IsEmpty]: Start isEmpty. Operand 1607 states and 2554 transitions. [2023-11-26 12:04:09,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2023-11-26 12:04:09,777 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:04:09,777 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:04:09,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-26 12:04:09,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-26 12:04:09,986 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:04:09,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:04:09,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1897900756, now seen corresponding path program 1 times [2023-11-26 12:04:09,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:04:09,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212338793] [2023-11-26 12:04:09,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:04:09,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:04:10,053 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:04:10,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [233060539] [2023-11-26 12:04:10,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:04:10,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:04:10,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:04:10,055 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:04:10,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-26 12:04:10,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:10,614 INFO L262 TraceCheckSpWp]: Trace formula consists of 1051 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-26 12:04:10,629 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:04:11,684 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5100 trivial. 0 not checked. [2023-11-26 12:04:11,685 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 12:04:11,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:04:11,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212338793] [2023-11-26 12:04:11,685 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:04:11,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233060539] [2023-11-26 12:04:11,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233060539] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:04:11,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:04:11,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 12:04:11,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364037766] [2023-11-26 12:04:11,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:04:11,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 12:04:11,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:04:11,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 12:04:11,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-26 12:04:11,691 INFO L87 Difference]: Start difference. First operand 1607 states and 2554 transitions. Second operand has 6 states, 6 states have (on average 20.0) internal successors, (120), 5 states have internal predecessors, (120), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2023-11-26 12:04:16,321 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-26 12:04:20,324 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-26 12:04:20,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:04:20,657 INFO L93 Difference]: Finished difference Result 4767 states and 7607 transitions. [2023-11-26 12:04:20,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 12:04:20,660 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 5 states have internal predecessors, (120), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) Word has length 372 [2023-11-26 12:04:20,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:04:20,679 INFO L225 Difference]: With dead ends: 4767 [2023-11-26 12:04:20,679 INFO L226 Difference]: Without dead ends: 3161 [2023-11-26 12:04:20,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 367 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2023-11-26 12:04:20,683 INFO L413 NwaCegarLoop]: 396 mSDtfsCounter, 1075 mSDsluCounter, 1327 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 207 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1075 SdHoareTripleChecker+Valid, 1723 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2023-11-26 12:04:20,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1075 Valid, 1723 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 190 Invalid, 2 Unknown, 0 Unchecked, 8.7s Time] [2023-11-26 12:04:20,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3161 states. [2023-11-26 12:04:20,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3161 to 1760. [2023-11-26 12:04:20,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1760 states, 1553 states have (on average 1.5647134578235673) internal successors, (2430), 1555 states have internal predecessors, (2430), 175 states have call successors, (175), 31 states have call predecessors, (175), 31 states have return successors, (175), 173 states have call predecessors, (175), 175 states have call successors, (175) [2023-11-26 12:04:20,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1760 states to 1760 states and 2780 transitions. [2023-11-26 12:04:20,852 INFO L78 Accepts]: Start accepts. Automaton has 1760 states and 2780 transitions. Word has length 372 [2023-11-26 12:04:20,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:04:20,853 INFO L495 AbstractCegarLoop]: Abstraction has 1760 states and 2780 transitions. [2023-11-26 12:04:20,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 5 states have internal predecessors, (120), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2023-11-26 12:04:20,853 INFO L276 IsEmpty]: Start isEmpty. Operand 1760 states and 2780 transitions. [2023-11-26 12:04:20,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2023-11-26 12:04:20,859 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:04:20,860 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:04:20,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-26 12:04:21,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-26 12:04:21,068 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:04:21,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:04:21,069 INFO L85 PathProgramCache]: Analyzing trace with hash 486023982, now seen corresponding path program 1 times [2023-11-26 12:04:21,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:04:21,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732793185] [2023-11-26 12:04:21,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:04:21,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:04:21,134 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:04:21,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2143727392] [2023-11-26 12:04:21,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:04:21,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:04:21,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:04:21,136 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:04:21,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d018f095-4b8d-440e-ad7a-14ecc485b565/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process