./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-62.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/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_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-62.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/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_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/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 4f8957d243f60f3b1c8dd5ae8036bb47a7344420b54bde3f58916ec11256e152 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:49:12,950 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:49:13,068 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 11:49:13,079 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:49:13,080 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:49:13,116 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:49:13,118 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:49:13,119 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:49:13,120 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:49:13,125 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:49:13,125 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:49:13,127 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:49:13,128 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:49:13,129 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:49:13,130 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:49:13,131 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:49:13,131 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:49:13,131 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:49:13,132 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:49:13,132 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:49:13,133 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:49:13,134 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:49:13,134 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:49:13,135 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:49:13,135 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:49:13,136 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:49:13,136 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:49:13,152 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:49:13,152 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:49:13,153 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:49:13,154 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:49:13,155 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:49:13,155 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:49:13,155 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:49:13,156 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:49:13,156 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:49:13,157 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:49:13,157 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:49:13,157 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:49:13,157 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:49:13,158 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:49:13,158 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:49:13,158 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_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4f8957d243f60f3b1c8dd5ae8036bb47a7344420b54bde3f58916ec11256e152 [2023-11-26 11:49:13,441 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:49:13,466 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:49:13,469 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:49:13,470 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:49:13,471 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:49:13,472 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-62.i [2023-11-26 11:49:16,591 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:49:16,982 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:49:16,988 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-62.i [2023-11-26 11:49:17,011 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/data/22ead135e/15ea7d4af805476ab01f2107f8f685c2/FLAGf502d076d [2023-11-26 11:49:17,032 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/data/22ead135e/15ea7d4af805476ab01f2107f8f685c2 [2023-11-26 11:49:17,035 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:49:17,036 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:49:17,038 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:49:17,038 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:49:17,048 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:49:17,049 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:49:17" (1/1) ... [2023-11-26 11:49:17,050 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30f59477 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:17, skipping insertion in model container [2023-11-26 11:49:17,050 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:49:17" (1/1) ... [2023-11-26 11:49:17,160 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:49:17,338 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_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-62.i[916,929] [2023-11-26 11:49:17,636 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:49:17,666 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:49:17,685 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_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-62.i[916,929] [2023-11-26 11:49:17,932 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:49:17,956 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:49:17,957 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:17 WrapperNode [2023-11-26 11:49:17,957 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:49:17,959 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:49:17,959 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:49:17,959 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:49:17,968 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:17" (1/1) ... [2023-11-26 11:49:18,028 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:17" (1/1) ... [2023-11-26 11:49:18,187 INFO L138 Inliner]: procedures = 26, calls = 99, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 871 [2023-11-26 11:49:18,188 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:49:18,189 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:49:18,189 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:49:18,189 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:49:18,202 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:17" (1/1) ... [2023-11-26 11:49:18,202 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:17" (1/1) ... [2023-11-26 11:49:18,235 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:17" (1/1) ... [2023-11-26 11:49:18,314 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-26 11:49:18,314 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:17" (1/1) ... [2023-11-26 11:49:18,315 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:17" (1/1) ... [2023-11-26 11:49:18,417 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:17" (1/1) ... [2023-11-26 11:49:18,424 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:17" (1/1) ... [2023-11-26 11:49:18,435 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:17" (1/1) ... [2023-11-26 11:49:18,463 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:17" (1/1) ... [2023-11-26 11:49:18,517 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:49:18,519 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:49:18,519 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:49:18,519 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:49:18,520 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:17" (1/1) ... [2023-11-26 11:49:18,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:49:18,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:49:18,567 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:49:18,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:49:18,609 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:49:18,609 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-26 11:49:18,609 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-26 11:49:18,610 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:49:18,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:49:18,610 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:49:18,774 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:49:18,776 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:49:20,346 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:49:20,469 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:49:20,469 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 11:49:20,470 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:49:20 BoogieIcfgContainer [2023-11-26 11:49:20,470 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:49:20,474 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:49:20,474 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:49:20,479 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:49:20,479 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:49:17" (1/3) ... [2023-11-26 11:49:20,481 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55ee8f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:49:20, skipping insertion in model container [2023-11-26 11:49:20,481 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:49:17" (2/3) ... [2023-11-26 11:49:20,484 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55ee8f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:49:20, skipping insertion in model container [2023-11-26 11:49:20,485 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:49:20" (3/3) ... [2023-11-26 11:49:20,486 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount500_file-62.i [2023-11-26 11:49:20,510 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:49:20,510 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 11:49:20,599 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:49:20,608 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;@2494224e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:49:20,609 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 11:49:20,617 INFO L276 IsEmpty]: Start isEmpty. Operand has 327 states, 238 states have (on average 1.5756302521008403) internal successors, (375), 239 states have internal predecessors, (375), 86 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 86 states have call predecessors, (86), 86 states have call successors, (86) [2023-11-26 11:49:20,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 572 [2023-11-26 11:49:20,681 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:49:20,683 INFO L195 NwaCegarLoop]: trace histogram [86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:20,684 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:49:20,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:20,694 INFO L85 PathProgramCache]: Analyzing trace with hash 420240712, now seen corresponding path program 1 times [2023-11-26 11:49:20,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:20,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140613052] [2023-11-26 11:49:20,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:20,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:21,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:21,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:21,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140613052] [2023-11-26 11:49:21,198 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-26 11:49:21,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498192205] [2023-11-26 11:49:21,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:21,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:49:21,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:49:21,203 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:49:21,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:49:21,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:21,761 INFO L262 TraceCheckSpWp]: Trace formula consists of 1407 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-26 11:49:21,807 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:49:21,912 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 170 proven. 0 refuted. 0 times theorem prover too weak. 14450 trivial. 0 not checked. [2023-11-26 11:49:21,912 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:49:21,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498192205] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:49:21,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:49:21,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:49:21,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975088211] [2023-11-26 11:49:21,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:49:21,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 11:49:21,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:21,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 11:49:21,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:49:21,972 INFO L87 Difference]: Start difference. First operand has 327 states, 238 states have (on average 1.5756302521008403) internal successors, (375), 239 states have internal predecessors, (375), 86 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 86 states have call predecessors, (86), 86 states have call successors, (86) Second operand has 2 states, 2 states have (on average 73.0) internal successors, (146), 2 states have internal predecessors, (146), 2 states have call successors, (86), 2 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 2 states have call successors, (86) [2023-11-26 11:49:22,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:49:22,094 INFO L93 Difference]: Finished difference Result 651 states and 1178 transitions. [2023-11-26 11:49:22,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 11:49:22,107 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 73.0) internal successors, (146), 2 states have internal predecessors, (146), 2 states have call successors, (86), 2 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 2 states have call successors, (86) Word has length 571 [2023-11-26 11:49:22,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:49:22,124 INFO L225 Difference]: With dead ends: 651 [2023-11-26 11:49:22,124 INFO L226 Difference]: Without dead ends: 325 [2023-11-26 11:49:22,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 570 GetRequests, 570 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:49:22,139 INFO L413 NwaCegarLoop]: 539 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, 539 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:49:22,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 539 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:49:22,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2023-11-26 11:49:22,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 325. [2023-11-26 11:49:22,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 237 states have (on average 1.5611814345991561) internal successors, (370), 237 states have internal predecessors, (370), 86 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 86 states have call predecessors, (86), 86 states have call successors, (86) [2023-11-26 11:49:22,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 542 transitions. [2023-11-26 11:49:22,258 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 542 transitions. Word has length 571 [2023-11-26 11:49:22,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:49:22,260 INFO L495 AbstractCegarLoop]: Abstraction has 325 states and 542 transitions. [2023-11-26 11:49:22,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 73.0) internal successors, (146), 2 states have internal predecessors, (146), 2 states have call successors, (86), 2 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 2 states have call successors, (86) [2023-11-26 11:49:22,261 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 542 transitions. [2023-11-26 11:49:22,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 572 [2023-11-26 11:49:22,279 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:49:22,279 INFO L195 NwaCegarLoop]: trace histogram [86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:22,289 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-26 11:49:22,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-26 11:49:22,489 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:49:22,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:22,490 INFO L85 PathProgramCache]: Analyzing trace with hash -2082324960, now seen corresponding path program 1 times [2023-11-26 11:49:22,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:22,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642675726] [2023-11-26 11:49:22,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:22,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:22,662 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:49:22,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2050116472] [2023-11-26 11:49:22,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:22,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:49:22,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:49:22,664 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:49:22,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:49:23,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:23,210 INFO L262 TraceCheckSpWp]: Trace formula consists of 1407 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 11:49:23,230 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:49:23,723 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 7200 proven. 0 refuted. 0 times theorem prover too weak. 7420 trivial. 0 not checked. [2023-11-26 11:49:23,724 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:49:23,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:23,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642675726] [2023-11-26 11:49:23,724 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:49:23,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050116472] [2023-11-26 11:49:23,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050116472] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:49:23,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:49:23,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:49:23,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733944425] [2023-11-26 11:49:23,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:49:23,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:49:23,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:23,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:49:23,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:49:23,733 INFO L87 Difference]: Start difference. First operand 325 states and 542 transitions. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 2 states have call successors, (86), 2 states have call predecessors, (86), 2 states have return successors, (86), 2 states have call predecessors, (86), 2 states have call successors, (86) [2023-11-26 11:49:23,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:49:23,855 INFO L93 Difference]: Finished difference Result 649 states and 1083 transitions. [2023-11-26 11:49:23,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:49:23,857 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 2 states have call successors, (86), 2 states have call predecessors, (86), 2 states have return successors, (86), 2 states have call predecessors, (86), 2 states have call successors, (86) Word has length 571 [2023-11-26 11:49:23,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:49:23,864 INFO L225 Difference]: With dead ends: 649 [2023-11-26 11:49:23,864 INFO L226 Difference]: Without dead ends: 325 [2023-11-26 11:49:23,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 570 GetRequests, 569 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:49:23,867 INFO L413 NwaCegarLoop]: 521 mSDtfsCounter, 398 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:49:23,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [398 Valid, 521 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:49:23,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2023-11-26 11:49:23,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 325. [2023-11-26 11:49:23,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 237 states have (on average 1.5569620253164558) internal successors, (369), 237 states have internal predecessors, (369), 86 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 86 states have call predecessors, (86), 86 states have call successors, (86) [2023-11-26 11:49:23,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 541 transitions. [2023-11-26 11:49:23,923 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 541 transitions. Word has length 571 [2023-11-26 11:49:23,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:49:23,929 INFO L495 AbstractCegarLoop]: Abstraction has 325 states and 541 transitions. [2023-11-26 11:49:23,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 2 states have call successors, (86), 2 states have call predecessors, (86), 2 states have return successors, (86), 2 states have call predecessors, (86), 2 states have call successors, (86) [2023-11-26 11:49:23,929 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 541 transitions. [2023-11-26 11:49:23,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 572 [2023-11-26 11:49:23,947 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:49:23,947 INFO L195 NwaCegarLoop]: trace histogram [86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:23,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:49:24,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:49:24,157 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:49:24,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:24,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1834178466, now seen corresponding path program 1 times [2023-11-26 11:49:24,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:24,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060911158] [2023-11-26 11:49:24,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:24,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:24,321 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:49:24,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [160288703] [2023-11-26 11:49:24,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:24,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:49:24,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:49:24,326 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:49:24,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:49:24,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:24,804 INFO L262 TraceCheckSpWp]: Trace formula consists of 1405 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 11:49:24,817 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:49:24,929 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14620 trivial. 0 not checked. [2023-11-26 11:49:24,930 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:49:24,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:24,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060911158] [2023-11-26 11:49:24,930 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:49:24,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160288703] [2023-11-26 11:49:24,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160288703] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:49:24,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:49:24,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:49:24,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119984784] [2023-11-26 11:49:24,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:49:24,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:49:24,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:24,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:49:24,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:49:24,935 INFO L87 Difference]: Start difference. First operand 325 states and 541 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) [2023-11-26 11:49:25,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:49:25,101 INFO L93 Difference]: Finished difference Result 869 states and 1446 transitions. [2023-11-26 11:49:25,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:49:25,102 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) Word has length 571 [2023-11-26 11:49:25,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:49:25,109 INFO L225 Difference]: With dead ends: 869 [2023-11-26 11:49:25,109 INFO L226 Difference]: Without dead ends: 545 [2023-11-26 11:49:25,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 570 GetRequests, 569 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:49:25,112 INFO L413 NwaCegarLoop]: 603 mSDtfsCounter, 335 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 1113 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:49:25,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [335 Valid, 1113 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:49:25,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2023-11-26 11:49:25,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 542. [2023-11-26 11:49:25,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 425 states have (on average 1.576470588235294) internal successors, (670), 426 states have internal predecessors, (670), 114 states have call successors, (114), 2 states have call predecessors, (114), 2 states have return successors, (114), 113 states have call predecessors, (114), 114 states have call successors, (114) [2023-11-26 11:49:25,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 898 transitions. [2023-11-26 11:49:25,201 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 898 transitions. Word has length 571 [2023-11-26 11:49:25,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:49:25,203 INFO L495 AbstractCegarLoop]: Abstraction has 542 states and 898 transitions. [2023-11-26 11:49:25,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) [2023-11-26 11:49:25,204 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 898 transitions. [2023-11-26 11:49:25,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 572 [2023-11-26 11:49:25,213 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:49:25,214 INFO L195 NwaCegarLoop]: trace histogram [86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:25,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 11:49:25,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:49:25,423 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:49:25,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:25,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1388313442, now seen corresponding path program 1 times [2023-11-26 11:49:25,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:25,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711529951] [2023-11-26 11:49:25,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:25,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:25,575 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:49:25,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [785896132] [2023-11-26 11:49:25,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:25,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:49:25,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:49:25,577 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:49:25,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:49:26,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:26,068 INFO L262 TraceCheckSpWp]: Trace formula consists of 1407 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 11:49:26,089 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:49:26,144 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14620 trivial. 0 not checked. [2023-11-26 11:49:26,144 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:49:26,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:26,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711529951] [2023-11-26 11:49:26,145 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:49:26,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785896132] [2023-11-26 11:49:26,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785896132] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:49:26,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:49:26,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:49:26,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143471852] [2023-11-26 11:49:26,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:49:26,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:49:26,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:26,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:49:26,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:49:26,151 INFO L87 Difference]: Start difference. First operand 542 states and 898 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) [2023-11-26 11:49:26,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:49:26,235 INFO L93 Difference]: Finished difference Result 1369 states and 2274 transitions. [2023-11-26 11:49:26,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:49:26,236 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) Word has length 571 [2023-11-26 11:49:26,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:49:26,245 INFO L225 Difference]: With dead ends: 1369 [2023-11-26 11:49:26,245 INFO L226 Difference]: Without dead ends: 828 [2023-11-26 11:49:26,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 570 GetRequests, 569 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:49:26,250 INFO L413 NwaCegarLoop]: 775 mSDtfsCounter, 261 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 1289 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 11:49:26,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 1289 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:49:26,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2023-11-26 11:49:26,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 794. [2023-11-26 11:49:26,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 794 states, 677 states have (on average 1.6189069423929099) internal successors, (1096), 678 states have internal predecessors, (1096), 114 states have call successors, (114), 2 states have call predecessors, (114), 2 states have return successors, (114), 113 states have call predecessors, (114), 114 states have call successors, (114) [2023-11-26 11:49:26,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 1324 transitions. [2023-11-26 11:49:26,337 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 1324 transitions. Word has length 571 [2023-11-26 11:49:26,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:49:26,341 INFO L495 AbstractCegarLoop]: Abstraction has 794 states and 1324 transitions. [2023-11-26 11:49:26,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) [2023-11-26 11:49:26,342 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 1324 transitions. [2023-11-26 11:49:26,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 572 [2023-11-26 11:49:26,348 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:49:26,349 INFO L195 NwaCegarLoop]: trace histogram [86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:26,362 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-26 11:49:26,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:49:26,558 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:49:26,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:26,558 INFO L85 PathProgramCache]: Analyzing trace with hash -2067620192, now seen corresponding path program 1 times [2023-11-26 11:49:26,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:26,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125286706] [2023-11-26 11:49:26,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:26,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:26,685 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:49:26,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [929695592] [2023-11-26 11:49:26,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:26,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:49:26,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:49:26,687 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:49:26,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:49:27,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:27,188 INFO L262 TraceCheckSpWp]: Trace formula consists of 1408 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 11:49:27,201 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:49:27,252 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14620 trivial. 0 not checked. [2023-11-26 11:49:27,254 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:49:27,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:27,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125286706] [2023-11-26 11:49:27,257 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:49:27,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929695592] [2023-11-26 11:49:27,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929695592] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:49:27,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:49:27,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:49:27,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67026074] [2023-11-26 11:49:27,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:49:27,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:49:27,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:27,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:49:27,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:49:27,268 INFO L87 Difference]: Start difference. First operand 794 states and 1324 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) [2023-11-26 11:49:27,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:49:27,403 INFO L93 Difference]: Finished difference Result 2372 states and 3954 transitions. [2023-11-26 11:49:27,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:49:27,404 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) Word has length 571 [2023-11-26 11:49:27,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:49:27,417 INFO L225 Difference]: With dead ends: 2372 [2023-11-26 11:49:27,417 INFO L226 Difference]: Without dead ends: 1579 [2023-11-26 11:49:27,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 570 GetRequests, 569 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:49:27,420 INFO L413 NwaCegarLoop]: 686 mSDtfsCounter, 529 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 529 SdHoareTripleChecker+Valid, 1212 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:49:27,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [529 Valid, 1212 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:49:27,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1579 states. [2023-11-26 11:49:27,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1579 to 1577. [2023-11-26 11:49:27,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1577 states, 1344 states have (on average 1.6086309523809523) internal successors, (2162), 1346 states have internal predecessors, (2162), 228 states have call successors, (228), 4 states have call predecessors, (228), 4 states have return successors, (228), 226 states have call predecessors, (228), 228 states have call successors, (228) [2023-11-26 11:49:27,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1577 states to 1577 states and 2618 transitions. [2023-11-26 11:49:27,615 INFO L78 Accepts]: Start accepts. Automaton has 1577 states and 2618 transitions. Word has length 571 [2023-11-26 11:49:27,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:49:27,617 INFO L495 AbstractCegarLoop]: Abstraction has 1577 states and 2618 transitions. [2023-11-26 11:49:27,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) [2023-11-26 11:49:27,617 INFO L276 IsEmpty]: Start isEmpty. Operand 1577 states and 2618 transitions. [2023-11-26 11:49:27,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 572 [2023-11-26 11:49:27,624 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:49:27,625 INFO L195 NwaCegarLoop]: trace histogram [86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:27,637 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-26 11:49:27,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:49:27,834 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:49:27,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:27,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1725172192, now seen corresponding path program 1 times [2023-11-26 11:49:27,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:27,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701160863] [2023-11-26 11:49:27,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:27,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:27,953 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:49:27,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [355103785] [2023-11-26 11:49:27,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:27,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:49:27,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:49:27,958 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:49:27,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 11:49:28,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:28,468 INFO L262 TraceCheckSpWp]: Trace formula consists of 1411 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 11:49:28,482 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:49:30,493 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14620 trivial. 0 not checked. [2023-11-26 11:49:30,494 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:49:30,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:30,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701160863] [2023-11-26 11:49:30,494 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:49:30,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355103785] [2023-11-26 11:49:30,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355103785] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:49:30,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:49:30,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:49:30,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836280135] [2023-11-26 11:49:30,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:49:30,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:49:30,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:30,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:49:30,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:49:30,500 INFO L87 Difference]: Start difference. First operand 1577 states and 2618 transitions. Second operand has 5 states, 5 states have (on average 28.8) internal successors, (144), 4 states have internal predecessors, (144), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) [2023-11-26 11:49:31,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:49:31,552 INFO L93 Difference]: Finished difference Result 5389 states and 8946 transitions. [2023-11-26 11:49:31,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:49:31,553 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 4 states have internal predecessors, (144), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) Word has length 571 [2023-11-26 11:49:31,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:49:31,580 INFO L225 Difference]: With dead ends: 5389 [2023-11-26 11:49:31,580 INFO L226 Difference]: Without dead ends: 3813 [2023-11-26 11:49:31,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 571 GetRequests, 567 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:49:31,587 INFO L413 NwaCegarLoop]: 538 mSDtfsCounter, 1154 mSDsluCounter, 1223 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1154 SdHoareTripleChecker+Valid, 1761 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-26 11:49:31,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1154 Valid, 1761 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-26 11:49:31,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3813 states. [2023-11-26 11:49:31,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3813 to 3745. [2023-11-26 11:49:31,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3745 states, 3193 states have (on average 1.5956780457250235) internal successors, (5095), 3197 states have internal predecessors, (5095), 542 states have call successors, (542), 9 states have call predecessors, (542), 9 states have return successors, (542), 538 states have call predecessors, (542), 542 states have call successors, (542) [2023-11-26 11:49:32,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3745 states to 3745 states and 6179 transitions. [2023-11-26 11:49:32,028 INFO L78 Accepts]: Start accepts. Automaton has 3745 states and 6179 transitions. Word has length 571 [2023-11-26 11:49:32,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:49:32,030 INFO L495 AbstractCegarLoop]: Abstraction has 3745 states and 6179 transitions. [2023-11-26 11:49:32,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 4 states have internal predecessors, (144), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) [2023-11-26 11:49:32,030 INFO L276 IsEmpty]: Start isEmpty. Operand 3745 states and 6179 transitions. [2023-11-26 11:49:32,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 573 [2023-11-26 11:49:32,037 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:49:32,037 INFO L195 NwaCegarLoop]: trace histogram [86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:32,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 11:49:32,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:49:32,247 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:49:32,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:32,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1382127828, now seen corresponding path program 1 times [2023-11-26 11:49:32,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:32,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210227537] [2023-11-26 11:49:32,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:32,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:32,355 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:49:32,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1040459989] [2023-11-26 11:49:32,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:32,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:49:32,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:49:32,357 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:49:32,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 11:49:32,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:32,894 INFO L262 TraceCheckSpWp]: Trace formula consists of 1413 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 11:49:32,906 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:49:32,969 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14620 trivial. 0 not checked. [2023-11-26 11:49:32,969 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:49:32,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:32,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210227537] [2023-11-26 11:49:32,970 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:49:32,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040459989] [2023-11-26 11:49:32,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040459989] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:49:32,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:49:32,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:49:32,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23227306] [2023-11-26 11:49:32,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:49:32,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:49:32,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:32,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:49:32,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:49:32,974 INFO L87 Difference]: Start difference. First operand 3745 states and 6179 transitions. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) [2023-11-26 11:49:33,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:49:33,215 INFO L93 Difference]: Finished difference Result 9185 states and 15079 transitions. [2023-11-26 11:49:33,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:49:33,217 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) Word has length 572 [2023-11-26 11:49:33,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:49:33,256 INFO L225 Difference]: With dead ends: 9185 [2023-11-26 11:49:33,257 INFO L226 Difference]: Without dead ends: 5855 [2023-11-26 11:49:33,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 571 GetRequests, 570 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:49:33,267 INFO L413 NwaCegarLoop]: 712 mSDtfsCounter, 234 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 1237 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:49:33,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 1237 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:49:33,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5855 states. [2023-11-26 11:49:33,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5855 to 5845. [2023-11-26 11:49:33,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5845 states, 5077 states have (on average 1.5873547370494387) internal successors, (8059), 5089 states have internal predecessors, (8059), 750 states have call successors, (750), 17 states have call predecessors, (750), 17 states have return successors, (750), 738 states have call predecessors, (750), 750 states have call successors, (750) [2023-11-26 11:49:33,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5845 states to 5845 states and 9559 transitions. [2023-11-26 11:49:33,780 INFO L78 Accepts]: Start accepts. Automaton has 5845 states and 9559 transitions. Word has length 572 [2023-11-26 11:49:33,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:49:33,781 INFO L495 AbstractCegarLoop]: Abstraction has 5845 states and 9559 transitions. [2023-11-26 11:49:33,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) [2023-11-26 11:49:33,782 INFO L276 IsEmpty]: Start isEmpty. Operand 5845 states and 9559 transitions. [2023-11-26 11:49:33,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 573 [2023-11-26 11:49:33,789 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:49:33,789 INFO L195 NwaCegarLoop]: trace histogram [86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:33,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 11:49:33,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:49:33,999 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:49:34,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:34,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1541032170, now seen corresponding path program 1 times [2023-11-26 11:49:34,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:34,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678221463] [2023-11-26 11:49:34,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:34,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:34,084 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:49:34,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [33099279] [2023-11-26 11:49:34,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:34,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:49:34,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:49:34,086 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:49:34,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 11:49:34,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:34,590 INFO L262 TraceCheckSpWp]: Trace formula consists of 1412 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 11:49:34,609 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:49:34,724 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14620 trivial. 0 not checked. [2023-11-26 11:49:34,724 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:49:34,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:34,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678221463] [2023-11-26 11:49:34,725 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:49:34,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33099279] [2023-11-26 11:49:34,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33099279] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:49:34,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:49:34,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:49:34,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982220518] [2023-11-26 11:49:34,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:49:34,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:49:34,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:34,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:49:34,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:49:34,730 INFO L87 Difference]: Start difference. First operand 5845 states and 9559 transitions. Second operand has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) [2023-11-26 11:49:35,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:49:35,632 INFO L93 Difference]: Finished difference Result 15997 states and 26135 transitions. [2023-11-26 11:49:35,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:49:35,633 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) Word has length 572 [2023-11-26 11:49:35,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:49:35,707 INFO L225 Difference]: With dead ends: 15997 [2023-11-26 11:49:35,707 INFO L226 Difference]: Without dead ends: 10487 [2023-11-26 11:49:35,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 573 GetRequests, 570 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:49:35,724 INFO L413 NwaCegarLoop]: 879 mSDtfsCounter, 1366 mSDsluCounter, 1540 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1366 SdHoareTripleChecker+Valid, 2419 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 11:49:35,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1366 Valid, 2419 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 11:49:35,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10487 states. [2023-11-26 11:49:36,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10487 to 10447. [2023-11-26 11:49:36,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10447 states, 9055 states have (on average 1.5831032578685809) internal successors, (14335), 9083 states have internal predecessors, (14335), 1358 states have call successors, (1358), 33 states have call predecessors, (1358), 33 states have return successors, (1358), 1330 states have call predecessors, (1358), 1358 states have call successors, (1358) [2023-11-26 11:49:36,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10447 states to 10447 states and 17051 transitions. [2023-11-26 11:49:36,503 INFO L78 Accepts]: Start accepts. Automaton has 10447 states and 17051 transitions. Word has length 572 [2023-11-26 11:49:36,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:49:36,504 INFO L495 AbstractCegarLoop]: Abstraction has 10447 states and 17051 transitions. [2023-11-26 11:49:36,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) [2023-11-26 11:49:36,506 INFO L276 IsEmpty]: Start isEmpty. Operand 10447 states and 17051 transitions. [2023-11-26 11:49:36,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 573 [2023-11-26 11:49:36,513 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:49:36,514 INFO L195 NwaCegarLoop]: trace histogram [86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:36,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 11:49:36,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-26 11:49:36,724 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:49:36,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:36,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1581706920, now seen corresponding path program 1 times [2023-11-26 11:49:36,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:36,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726490258] [2023-11-26 11:49:36,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:36,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:36,855 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:49:36,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [387083043] [2023-11-26 11:49:36,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:36,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:49:36,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:49:36,858 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:49:36,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 11:49:37,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:37,405 INFO L262 TraceCheckSpWp]: Trace formula consists of 1413 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:49:37,428 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:49:38,224 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 6273 proven. 177 refuted. 0 times theorem prover too weak. 8170 trivial. 0 not checked. [2023-11-26 11:49:38,225 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:49:38,803 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 78 proven. 177 refuted. 0 times theorem prover too weak. 14365 trivial. 0 not checked. [2023-11-26 11:49:38,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:38,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726490258] [2023-11-26 11:49:38,803 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:49:38,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387083043] [2023-11-26 11:49:38,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387083043] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:49:38,804 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:49:38,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-26 11:49:38,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299751464] [2023-11-26 11:49:38,807 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:49:38,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:49:38,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:38,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:49:38,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:49:38,812 INFO L87 Difference]: Start difference. First operand 10447 states and 17051 transitions. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 2 states have call successors, (145), 2 states have call predecessors, (145), 4 states have return successors, (146), 2 states have call predecessors, (146), 2 states have call successors, (146) [2023-11-26 11:49:39,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:49:39,915 INFO L93 Difference]: Finished difference Result 16509 states and 26846 transitions. [2023-11-26 11:49:39,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:49:39,930 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 2 states have call successors, (145), 2 states have call predecessors, (145), 4 states have return successors, (146), 2 states have call predecessors, (146), 2 states have call successors, (146) Word has length 572 [2023-11-26 11:49:39,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:49:39,961 INFO L225 Difference]: With dead ends: 16509 [2023-11-26 11:49:39,961 INFO L226 Difference]: Without dead ends: 6583 [2023-11-26 11:49:40,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1146 GetRequests, 1136 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 11:49:40,012 INFO L413 NwaCegarLoop]: 489 mSDtfsCounter, 309 mSDsluCounter, 825 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 1314 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-26 11:49:40,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [335 Valid, 1314 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 729 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-26 11:49:40,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6583 states. [2023-11-26 11:49:40,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6583 to 6531. [2023-11-26 11:49:40,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6531 states, 5538 states have (on average 1.567172264355363) internal successors, (8679), 5550 states have internal predecessors, (8679), 942 states have call successors, (942), 50 states have call predecessors, (942), 50 states have return successors, (942), 930 states have call predecessors, (942), 942 states have call successors, (942) [2023-11-26 11:49:40,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6531 states to 6531 states and 10563 transitions. [2023-11-26 11:49:40,607 INFO L78 Accepts]: Start accepts. Automaton has 6531 states and 10563 transitions. Word has length 572 [2023-11-26 11:49:40,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:49:40,608 INFO L495 AbstractCegarLoop]: Abstraction has 6531 states and 10563 transitions. [2023-11-26 11:49:40,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 2 states have call successors, (145), 2 states have call predecessors, (145), 4 states have return successors, (146), 2 states have call predecessors, (146), 2 states have call successors, (146) [2023-11-26 11:49:40,609 INFO L276 IsEmpty]: Start isEmpty. Operand 6531 states and 10563 transitions. [2023-11-26 11:49:40,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 574 [2023-11-26 11:49:40,619 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:49:40,619 INFO L195 NwaCegarLoop]: trace histogram [86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:40,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 11:49:40,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:49:40,830 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:49:40,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:40,830 INFO L85 PathProgramCache]: Analyzing trace with hash -2141769963, now seen corresponding path program 1 times [2023-11-26 11:49:40,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:40,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287790653] [2023-11-26 11:49:40,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:40,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:40,942 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:49:40,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1381823860] [2023-11-26 11:49:40,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:40,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:49:40,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:49:40,945 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:49:40,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 11:49:41,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:41,493 INFO L262 TraceCheckSpWp]: Trace formula consists of 1414 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:49:41,505 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:49:42,150 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 6525 proven. 171 refuted. 0 times theorem prover too weak. 7924 trivial. 0 not checked. [2023-11-26 11:49:42,150 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:49:42,693 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 84 proven. 171 refuted. 0 times theorem prover too weak. 14365 trivial. 0 not checked. [2023-11-26 11:49:42,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:42,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287790653] [2023-11-26 11:49:42,694 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:49:42,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381823860] [2023-11-26 11:49:42,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381823860] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:49:42,694 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:49:42,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-26 11:49:42,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878384560] [2023-11-26 11:49:42,696 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:49:42,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:49:42,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:42,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:49:42,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:49:42,700 INFO L87 Difference]: Start difference. First operand 6531 states and 10563 transitions. Second operand has 7 states, 7 states have (on average 22.142857142857142) internal successors, (155), 7 states have internal predecessors, (155), 2 states have call successors, (143), 2 states have call predecessors, (143), 4 states have return successors, (144), 2 states have call predecessors, (144), 2 states have call successors, (144) [2023-11-26 11:49:43,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:49:43,520 INFO L93 Difference]: Finished difference Result 9829 states and 15887 transitions. [2023-11-26 11:49:43,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 11:49:43,521 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.142857142857142) internal successors, (155), 7 states have internal predecessors, (155), 2 states have call successors, (143), 2 states have call predecessors, (143), 4 states have return successors, (144), 2 states have call predecessors, (144), 2 states have call successors, (144) Word has length 573 [2023-11-26 11:49:43,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:49:43,538 INFO L225 Difference]: With dead ends: 9829 [2023-11-26 11:49:43,538 INFO L226 Difference]: Without dead ends: 3781 [2023-11-26 11:49:43,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1148 GetRequests, 1138 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:49:43,551 INFO L413 NwaCegarLoop]: 424 mSDtfsCounter, 673 mSDsluCounter, 673 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 701 SdHoareTripleChecker+Valid, 1097 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-26 11:49:43,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [701 Valid, 1097 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-26 11:49:43,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3781 states. [2023-11-26 11:49:43,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3781 to 3745. [2023-11-26 11:49:43,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3745 states, 2991 states have (on average 1.5215646940822467) internal successors, (4551), 2995 states have internal predecessors, (4551), 718 states have call successors, (718), 35 states have call predecessors, (718), 35 states have return successors, (718), 714 states have call predecessors, (718), 718 states have call successors, (718) [2023-11-26 11:49:44,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3745 states to 3745 states and 5987 transitions. [2023-11-26 11:49:44,009 INFO L78 Accepts]: Start accepts. Automaton has 3745 states and 5987 transitions. Word has length 573 [2023-11-26 11:49:44,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:49:44,010 INFO L495 AbstractCegarLoop]: Abstraction has 3745 states and 5987 transitions. [2023-11-26 11:49:44,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.142857142857142) internal successors, (155), 7 states have internal predecessors, (155), 2 states have call successors, (143), 2 states have call predecessors, (143), 4 states have return successors, (144), 2 states have call predecessors, (144), 2 states have call successors, (144) [2023-11-26 11:49:44,011 INFO L276 IsEmpty]: Start isEmpty. Operand 3745 states and 5987 transitions. [2023-11-26 11:49:44,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 577 [2023-11-26 11:49:44,017 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:49:44,017 INFO L195 NwaCegarLoop]: trace histogram [86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:44,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-26 11:49:44,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-26 11:49:44,227 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:49:44,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:44,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1851701686, now seen corresponding path program 1 times [2023-11-26 11:49:44,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:44,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671292881] [2023-11-26 11:49:44,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:44,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:44,311 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:49:44,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1930315663] [2023-11-26 11:49:44,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:44,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:49:44,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:49:44,313 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:49:44,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-26 11:49:44,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:44,870 INFO L262 TraceCheckSpWp]: Trace formula consists of 1414 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:49:44,882 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:49:45,111 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 3973 proven. 39 refuted. 0 times theorem prover too weak. 10608 trivial. 0 not checked. [2023-11-26 11:49:45,111 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:49:45,542 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 216 proven. 39 refuted. 0 times theorem prover too weak. 14365 trivial. 0 not checked. [2023-11-26 11:49:45,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:45,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671292881] [2023-11-26 11:49:45,543 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:49:45,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930315663] [2023-11-26 11:49:45,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930315663] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:49:45,544 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:49:45,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-26 11:49:45,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583184284] [2023-11-26 11:49:45,545 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:49:45,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:49:45,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:45,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:49:45,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:49:45,548 INFO L87 Difference]: Start difference. First operand 3745 states and 5987 transitions. Second operand has 7 states, 7 states have (on average 22.571428571428573) internal successors, (158), 7 states have internal predecessors, (158), 2 states have call successors, (99), 2 states have call predecessors, (99), 4 states have return successors, (100), 2 states have call predecessors, (100), 2 states have call successors, (100) [2023-11-26 11:49:46,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:49:46,816 INFO L93 Difference]: Finished difference Result 4705 states and 7493 transitions. [2023-11-26 11:49:46,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:49:46,816 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.571428571428573) internal successors, (158), 7 states have internal predecessors, (158), 2 states have call successors, (99), 2 states have call predecessors, (99), 4 states have return successors, (100), 2 states have call predecessors, (100), 2 states have call successors, (100) Word has length 576 [2023-11-26 11:49:46,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:49:46,823 INFO L225 Difference]: With dead ends: 4705 [2023-11-26 11:49:46,823 INFO L226 Difference]: Without dead ends: 1264 [2023-11-26 11:49:46,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1154 GetRequests, 1144 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 11:49:46,834 INFO L413 NwaCegarLoop]: 541 mSDtfsCounter, 682 mSDsluCounter, 806 mSDsCounter, 0 mSdLazyCounter, 966 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 754 SdHoareTripleChecker+Valid, 1347 SdHoareTripleChecker+Invalid, 1119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:49:46,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [754 Valid, 1347 Invalid, 1119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 966 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-26 11:49:46,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1264 states. [2023-11-26 11:49:46,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1264 to 1246. [2023-11-26 11:49:46,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 971 states have (on average 1.4933058702368691) internal successors, (1450), 971 states have internal predecessors, (1450), 258 states have call successors, (258), 16 states have call predecessors, (258), 16 states have return successors, (258), 258 states have call predecessors, (258), 258 states have call successors, (258) [2023-11-26 11:49:46,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 1966 transitions. [2023-11-26 11:49:46,986 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 1966 transitions. Word has length 576 [2023-11-26 11:49:46,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:49:46,987 INFO L495 AbstractCegarLoop]: Abstraction has 1246 states and 1966 transitions. [2023-11-26 11:49:46,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.571428571428573) internal successors, (158), 7 states have internal predecessors, (158), 2 states have call successors, (99), 2 states have call predecessors, (99), 4 states have return successors, (100), 2 states have call predecessors, (100), 2 states have call successors, (100) [2023-11-26 11:49:46,988 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 1966 transitions. [2023-11-26 11:49:46,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 578 [2023-11-26 11:49:46,993 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:49:46,994 INFO L195 NwaCegarLoop]: trace histogram [86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:47,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-26 11:49:47,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:49:47,203 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:49:47,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:47,204 INFO L85 PathProgramCache]: Analyzing trace with hash -474241532, now seen corresponding path program 1 times [2023-11-26 11:49:47,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:47,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453050480] [2023-11-26 11:49:47,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:47,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:47,343 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:49:47,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [18751201] [2023-11-26 11:49:47,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:47,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:49:47,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:49:47,355 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:49:47,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-26 11:49:47,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:47,898 INFO L262 TraceCheckSpWp]: Trace formula consists of 1412 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-26 11:49:47,911 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:49:49,770 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14620 trivial. 0 not checked. [2023-11-26 11:49:49,771 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:49:49,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:49,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453050480] [2023-11-26 11:49:49,771 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:49:49,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18751201] [2023-11-26 11:49:49,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18751201] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:49:49,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:49:49,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:49:49,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72268699] [2023-11-26 11:49:49,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:49:49,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:49:49,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:49,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:49:49,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:49:49,776 INFO L87 Difference]: Start difference. First operand 1246 states and 1966 transitions. Second operand has 5 states, 5 states have (on average 30.0) internal successors, (150), 4 states have internal predecessors, (150), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) [2023-11-26 11:49:50,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:49:50,393 INFO L93 Difference]: Finished difference Result 3322 states and 5245 transitions. [2023-11-26 11:49:50,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:49:50,394 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.0) internal successors, (150), 4 states have internal predecessors, (150), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) Word has length 577 [2023-11-26 11:49:50,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:49:50,405 INFO L225 Difference]: With dead ends: 3322 [2023-11-26 11:49:50,405 INFO L226 Difference]: Without dead ends: 2255 [2023-11-26 11:49:50,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 577 GetRequests, 573 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:49:50,410 INFO L413 NwaCegarLoop]: 513 mSDtfsCounter, 730 mSDsluCounter, 683 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 730 SdHoareTripleChecker+Valid, 1196 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 11:49:50,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [730 Valid, 1196 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 11:49:50,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2255 states. [2023-11-26 11:49:50,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2255 to 2253. [2023-11-26 11:49:50,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2253 states, 1794 states have (on average 1.4983277591973243) internal successors, (2688), 1794 states have internal predecessors, (2688), 430 states have call successors, (430), 28 states have call predecessors, (430), 28 states have return successors, (430), 430 states have call predecessors, (430), 430 states have call successors, (430) [2023-11-26 11:49:50,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2253 states to 2253 states and 3548 transitions. [2023-11-26 11:49:50,674 INFO L78 Accepts]: Start accepts. Automaton has 2253 states and 3548 transitions. Word has length 577 [2023-11-26 11:49:50,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:49:50,676 INFO L495 AbstractCegarLoop]: Abstraction has 2253 states and 3548 transitions. [2023-11-26 11:49:50,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.0) internal successors, (150), 4 states have internal predecessors, (150), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) [2023-11-26 11:49:50,676 INFO L276 IsEmpty]: Start isEmpty. Operand 2253 states and 3548 transitions. [2023-11-26 11:49:50,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 579 [2023-11-26 11:49:50,682 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:49:50,682 INFO L195 NwaCegarLoop]: trace histogram [86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:50,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-26 11:49:50,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:49:50,893 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:49:50,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:50,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1983868266, now seen corresponding path program 1 times [2023-11-26 11:49:50,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:50,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260497190] [2023-11-26 11:49:50,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:50,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:50,980 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:49:50,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [670646491] [2023-11-26 11:49:50,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:50,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:49:50,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:49:50,982 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:49:51,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-26 11:49:51,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:51,555 INFO L262 TraceCheckSpWp]: Trace formula consists of 1413 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:49:51,565 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:49:52,242 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 4945 proven. 201 refuted. 0 times theorem prover too weak. 9474 trivial. 0 not checked. [2023-11-26 11:49:52,242 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:49:52,725 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 54 proven. 201 refuted. 0 times theorem prover too weak. 14365 trivial. 0 not checked. [2023-11-26 11:49:52,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:52,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260497190] [2023-11-26 11:49:52,725 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:49:52,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670646491] [2023-11-26 11:49:52,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670646491] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:49:52,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:49:52,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-26 11:49:52,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994989004] [2023-11-26 11:49:52,727 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:49:52,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:49:52,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:52,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:49:52,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:49:52,731 INFO L87 Difference]: Start difference. First operand 2253 states and 3548 transitions. Second operand has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 states have internal predecessors, (160), 2 states have call successors, (153), 2 states have call predecessors, (153), 4 states have return successors, (154), 2 states have call predecessors, (154), 2 states have call successors, (154) [2023-11-26 11:49:53,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:49:53,465 INFO L93 Difference]: Finished difference Result 4377 states and 6857 transitions. [2023-11-26 11:49:53,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:49:53,466 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 states have internal predecessors, (160), 2 states have call successors, (153), 2 states have call predecessors, (153), 4 states have return successors, (154), 2 states have call predecessors, (154), 2 states have call successors, (154) Word has length 578 [2023-11-26 11:49:53,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:49:53,474 INFO L225 Difference]: With dead ends: 4377 [2023-11-26 11:49:53,475 INFO L226 Difference]: Without dead ends: 2313 [2023-11-26 11:49:53,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1158 GetRequests, 1148 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:49:53,481 INFO L413 NwaCegarLoop]: 423 mSDtfsCounter, 594 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 611 SdHoareTripleChecker+Valid, 1094 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 11:49:53,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [611 Valid, 1094 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 11:49:53,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2313 states. [2023-11-26 11:49:53,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2313 to 2273. [2023-11-26 11:49:53,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2273 states, 1809 states have (on average 1.4836926478717523) internal successors, (2684), 1809 states have internal predecessors, (2684), 430 states have call successors, (430), 33 states have call predecessors, (430), 33 states have return successors, (430), 430 states have call predecessors, (430), 430 states have call successors, (430) [2023-11-26 11:49:53,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2273 states to 2273 states and 3544 transitions. [2023-11-26 11:49:53,700 INFO L78 Accepts]: Start accepts. Automaton has 2273 states and 3544 transitions. Word has length 578 [2023-11-26 11:49:53,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:49:53,701 INFO L495 AbstractCegarLoop]: Abstraction has 2273 states and 3544 transitions. [2023-11-26 11:49:53,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 states have internal predecessors, (160), 2 states have call successors, (153), 2 states have call predecessors, (153), 4 states have return successors, (154), 2 states have call predecessors, (154), 2 states have call successors, (154) [2023-11-26 11:49:53,702 INFO L276 IsEmpty]: Start isEmpty. Operand 2273 states and 3544 transitions. [2023-11-26 11:49:53,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 580 [2023-11-26 11:49:53,707 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:49:53,708 INFO L195 NwaCegarLoop]: trace histogram [86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:53,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-26 11:49:53,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:49:53,917 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:49:53,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:53,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1276316582, now seen corresponding path program 1 times [2023-11-26 11:49:53,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:53,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242669811] [2023-11-26 11:49:53,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:53,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:53,994 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:49:53,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1031096759] [2023-11-26 11:49:53,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:53,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:49:53,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:49:53,996 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:49:54,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-26 11:49:54,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:54,565 INFO L262 TraceCheckSpWp]: Trace formula consists of 1416 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:49:54,576 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:49:55,194 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 5325 proven. 195 refuted. 0 times theorem prover too weak. 9100 trivial. 0 not checked. [2023-11-26 11:49:55,194 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:49:55,717 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 60 proven. 195 refuted. 0 times theorem prover too weak. 14365 trivial. 0 not checked. [2023-11-26 11:49:55,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:55,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242669811] [2023-11-26 11:49:55,718 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:49:55,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031096759] [2023-11-26 11:49:55,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031096759] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:49:55,720 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:49:55,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-26 11:49:55,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632162715] [2023-11-26 11:49:55,721 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:49:55,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:49:55,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:55,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:49:55,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:49:55,725 INFO L87 Difference]: Start difference. First operand 2273 states and 3544 transitions. Second operand has 7 states, 7 states have (on average 23.0) internal successors, (161), 7 states have internal predecessors, (161), 2 states have call successors, (151), 2 states have call predecessors, (151), 4 states have return successors, (152), 2 states have call predecessors, (152), 2 states have call successors, (152) [2023-11-26 11:49:56,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:49:56,564 INFO L93 Difference]: Finished difference Result 4408 states and 6830 transitions. [2023-11-26 11:49:56,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:49:56,565 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 7 states have internal predecessors, (161), 2 states have call successors, (151), 2 states have call predecessors, (151), 4 states have return successors, (152), 2 states have call predecessors, (152), 2 states have call successors, (152) Word has length 579 [2023-11-26 11:49:56,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:49:56,574 INFO L225 Difference]: With dead ends: 4408 [2023-11-26 11:49:56,575 INFO L226 Difference]: Without dead ends: 2334 [2023-11-26 11:49:56,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1160 GetRequests, 1150 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:49:56,582 INFO L413 NwaCegarLoop]: 417 mSDtfsCounter, 854 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 873 SdHoareTripleChecker+Valid, 1076 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-26 11:49:56,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [873 Valid, 1076 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-26 11:49:56,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2334 states. [2023-11-26 11:49:56,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2334 to 2284. [2023-11-26 11:49:56,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2284 states, 1815 states have (on average 1.4617079889807163) internal successors, (2653), 1815 states have internal predecessors, (2653), 430 states have call successors, (430), 38 states have call predecessors, (430), 38 states have return successors, (430), 430 states have call predecessors, (430), 430 states have call successors, (430) [2023-11-26 11:49:56,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2284 states to 2284 states and 3513 transitions. [2023-11-26 11:49:56,806 INFO L78 Accepts]: Start accepts. Automaton has 2284 states and 3513 transitions. Word has length 579 [2023-11-26 11:49:56,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:49:56,807 INFO L495 AbstractCegarLoop]: Abstraction has 2284 states and 3513 transitions. [2023-11-26 11:49:56,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 7 states have internal predecessors, (161), 2 states have call successors, (151), 2 states have call predecessors, (151), 4 states have return successors, (152), 2 states have call predecessors, (152), 2 states have call successors, (152) [2023-11-26 11:49:56,808 INFO L276 IsEmpty]: Start isEmpty. Operand 2284 states and 3513 transitions. [2023-11-26 11:49:56,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 581 [2023-11-26 11:49:56,813 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:49:56,814 INFO L195 NwaCegarLoop]: trace histogram [86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:56,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-26 11:49:57,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-26 11:49:57,024 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:49:57,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:57,025 INFO L85 PathProgramCache]: Analyzing trace with hash -324685526, now seen corresponding path program 1 times [2023-11-26 11:49:57,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:57,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982872316] [2023-11-26 11:49:57,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:57,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:57,101 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:49:57,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1614967770] [2023-11-26 11:49:57,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:57,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:49:57,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:49:57,103 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:49:57,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-26 11:49:57,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:57,714 INFO L262 TraceCheckSpWp]: Trace formula consists of 1417 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 11:49:57,726 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:49:57,788 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14620 trivial. 0 not checked. [2023-11-26 11:49:57,788 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:49:57,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:49:57,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982872316] [2023-11-26 11:49:57,789 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:49:57,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614967770] [2023-11-26 11:49:57,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614967770] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:49:57,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:49:57,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:49:57,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225833309] [2023-11-26 11:49:57,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:49:57,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:49:57,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:49:57,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:49:57,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:49:57,793 INFO L87 Difference]: Start difference. First operand 2284 states and 3513 transitions. Second operand has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) [2023-11-26 11:49:58,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:49:58,321 INFO L93 Difference]: Finished difference Result 6210 states and 9551 transitions. [2023-11-26 11:49:58,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:49:58,322 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) Word has length 580 [2023-11-26 11:49:58,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:49:58,335 INFO L225 Difference]: With dead ends: 6210 [2023-11-26 11:49:58,336 INFO L226 Difference]: Without dead ends: 4254 [2023-11-26 11:49:58,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 580 GetRequests, 577 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:49:58,346 INFO L413 NwaCegarLoop]: 905 mSDtfsCounter, 534 mSDsluCounter, 1367 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 534 SdHoareTripleChecker+Valid, 2272 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:49:58,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [534 Valid, 2272 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:49:58,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4254 states. [2023-11-26 11:49:58,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4254 to 4252. [2023-11-26 11:49:58,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4252 states, 3407 states have (on average 1.4628705606105077) internal successors, (4984), 3407 states have internal predecessors, (4984), 774 states have call successors, (774), 70 states have call predecessors, (774), 70 states have return successors, (774), 774 states have call predecessors, (774), 774 states have call successors, (774) [2023-11-26 11:49:58,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4252 states to 4252 states and 6532 transitions. [2023-11-26 11:49:58,798 INFO L78 Accepts]: Start accepts. Automaton has 4252 states and 6532 transitions. Word has length 580 [2023-11-26 11:49:58,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:49:58,799 INFO L495 AbstractCegarLoop]: Abstraction has 4252 states and 6532 transitions. [2023-11-26 11:49:58,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 1 states have call successors, (86), 1 states have call predecessors, (86), 1 states have return successors, (86), 1 states have call predecessors, (86), 1 states have call successors, (86) [2023-11-26 11:49:58,799 INFO L276 IsEmpty]: Start isEmpty. Operand 4252 states and 6532 transitions. [2023-11-26 11:49:58,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 581 [2023-11-26 11:49:58,808 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:49:58,808 INFO L195 NwaCegarLoop]: trace histogram [86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:49:58,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-26 11:49:59,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:49:59,018 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:49:59,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:49:59,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1345753880, now seen corresponding path program 1 times [2023-11-26 11:49:59,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:49:59,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437688883] [2023-11-26 11:49:59,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:59,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:49:59,106 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:49:59,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [820952542] [2023-11-26 11:49:59,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:49:59,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:49:59,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:49:59,108 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:49:59,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae6fa83f-1a70-47f9-ba34-d4e917dc5a11/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-26 11:49:59,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:49:59,801 INFO L262 TraceCheckSpWp]: Trace formula consists of 1417 conjuncts, 10 conjunts are in the unsatisfiable core