./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-49.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02d3b7ea-83bb-48c9-ae4e-c0646e45c4bd/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02d3b7ea-83bb-48c9-ae4e-c0646e45c4bd/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_02d3b7ea-83bb-48c9-ae4e-c0646e45c4bd/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02d3b7ea-83bb-48c9-ae4e-c0646e45c4bd/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-49.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02d3b7ea-83bb-48c9-ae4e-c0646e45c4bd/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_02d3b7ea-83bb-48c9-ae4e-c0646e45c4bd/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 0b9a87edc0e2ef9f5552ad3736d39cb387cb877c3654428f4c042b4d54eecb01 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:57:42,122 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:57:42,234 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02d3b7ea-83bb-48c9-ae4e-c0646e45c4bd/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 11:57:42,249 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:57:42,252 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:57:42,281 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:57:42,281 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:57:42,282 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:57:42,283 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:57:42,283 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:57:42,284 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:57:42,284 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:57:42,285 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:57:42,286 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:57:42,287 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:57:42,287 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:57:42,288 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:57:42,288 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:57:42,289 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:57:42,289 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:57:42,290 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:57:42,293 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:57:42,294 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:57:42,294 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:57:42,295 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:57:42,295 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:57:42,296 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:57:42,296 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:57:42,297 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:57:42,297 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:57:42,298 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:57:42,299 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:57:42,300 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:57:42,300 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:57:42,300 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:57:42,300 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:57:42,301 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:57:42,301 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:57:42,301 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:57:42,301 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:57:42,302 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:57:42,302 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:57:42,302 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_02d3b7ea-83bb-48c9-ae4e-c0646e45c4bd/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02d3b7ea-83bb-48c9-ae4e-c0646e45c4bd/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0b9a87edc0e2ef9f5552ad3736d39cb387cb877c3654428f4c042b4d54eecb01 [2023-11-26 11:57:42,570 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:57:42,592 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:57:42,595 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:57:42,597 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:57:42,597 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:57:42,598 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02d3b7ea-83bb-48c9-ae4e-c0646e45c4bd/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-49.i [2023-11-26 11:57:45,763 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:57:46,100 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:57:46,101 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02d3b7ea-83bb-48c9-ae4e-c0646e45c4bd/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-49.i [2023-11-26 11:57:46,131 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02d3b7ea-83bb-48c9-ae4e-c0646e45c4bd/bin/uautomizer-verify-VRDe98Ueme/data/df30b8e22/2e97f2fc9a8e434387b9cc5cca9a8943/FLAGc8fff66b9 [2023-11-26 11:57:46,150 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02d3b7ea-83bb-48c9-ae4e-c0646e45c4bd/bin/uautomizer-verify-VRDe98Ueme/data/df30b8e22/2e97f2fc9a8e434387b9cc5cca9a8943 [2023-11-26 11:57:46,153 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:57:46,155 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:57:46,156 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:57:46,156 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:57:46,162 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:57:46,163 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:57:46" (1/1) ... [2023-11-26 11:57:46,164 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d07899c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:46, skipping insertion in model container [2023-11-26 11:57:46,164 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:57:46" (1/1) ... [2023-11-26 11:57:46,230 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:57:46,376 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_02d3b7ea-83bb-48c9-ae4e-c0646e45c4bd/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-49.i[916,929] [2023-11-26 11:57:46,551 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:57:46,572 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:57:46,585 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_02d3b7ea-83bb-48c9-ae4e-c0646e45c4bd/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-49.i[916,929] [2023-11-26 11:57:46,662 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:57:46,693 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:57:46,694 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:46 WrapperNode [2023-11-26 11:57:46,694 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:57:46,695 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:57:46,696 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:57:46,696 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:57:46,705 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:46" (1/1) ... [2023-11-26 11:57:46,737 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:46" (1/1) ... [2023-11-26 11:57:46,830 INFO L138 Inliner]: procedures = 26, calls = 92, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 537 [2023-11-26 11:57:46,831 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:57:46,831 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:57:46,832 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:57:46,832 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:57:46,844 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:46" (1/1) ... [2023-11-26 11:57:46,848 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:46" (1/1) ... [2023-11-26 11:57:46,866 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:46" (1/1) ... [2023-11-26 11:57:46,915 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 11:57:46,915 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:46" (1/1) ... [2023-11-26 11:57:46,915 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:46" (1/1) ... [2023-11-26 11:57:46,942 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:46" (1/1) ... [2023-11-26 11:57:46,949 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:46" (1/1) ... [2023-11-26 11:57:46,959 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:46" (1/1) ... [2023-11-26 11:57:46,966 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:46" (1/1) ... [2023-11-26 11:57:46,982 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:57:46,983 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:57:46,983 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:57:46,984 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:57:46,984 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:46" (1/1) ... [2023-11-26 11:57:46,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:57:47,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02d3b7ea-83bb-48c9-ae4e-c0646e45c4bd/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:47,021 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02d3b7ea-83bb-48c9-ae4e-c0646e45c4bd/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:57:47,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02d3b7ea-83bb-48c9-ae4e-c0646e45c4bd/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:57:47,068 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:57:47,068 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-26 11:57:47,069 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-26 11:57:47,070 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:57:47,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:57:47,070 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:57:47,253 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:57:47,256 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:57:48,443 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:57:48,505 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:57:48,506 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 11:57:48,506 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:57:48 BoogieIcfgContainer [2023-11-26 11:57:48,506 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:57:48,509 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:57:48,509 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:57:48,513 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:57:48,513 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:57:46" (1/3) ... [2023-11-26 11:57:48,514 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@819634a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:57:48, skipping insertion in model container [2023-11-26 11:57:48,514 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:46" (2/3) ... [2023-11-26 11:57:48,514 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@819634a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:57:48, skipping insertion in model container [2023-11-26 11:57:48,514 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:57:48" (3/3) ... [2023-11-26 11:57:48,516 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-250_file-49.i [2023-11-26 11:57:48,538 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:57:48,538 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 11:57:48,616 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:57:48,624 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;@4e2c430b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:57:48,624 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 11:57:48,633 INFO L276 IsEmpty]: Start isEmpty. Operand has 213 states, 131 states have (on average 1.5725190839694656) internal successors, (206), 132 states have internal predecessors, (206), 79 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2023-11-26 11:57:48,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2023-11-26 11:57:48,702 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:48,703 INFO L195 NwaCegarLoop]: trace histogram [79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:57:48,704 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:57:48,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:48,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1380714339, now seen corresponding path program 1 times [2023-11-26 11:57:48,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:48,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972788525] [2023-11-26 11:57:48,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:48,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:49,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:49,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:49,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972788525] [2023-11-26 11:57:49,283 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-26 11:57:49,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014241432] [2023-11-26 11:57:49,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:49,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:49,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02d3b7ea-83bb-48c9-ae4e-c0646e45c4bd/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:49,289 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02d3b7ea-83bb-48c9-ae4e-c0646e45c4bd/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:57:49,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02d3b7ea-83bb-48c9-ae4e-c0646e45c4bd/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:57:49,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:49,720 INFO L262 TraceCheckSpWp]: Trace formula consists of 1096 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-26 11:57:49,799 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:49,957 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 156 proven. 0 refuted. 0 times theorem prover too weak. 12168 trivial. 0 not checked. [2023-11-26 11:57:49,958 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:57:49,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014241432] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:57:49,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:57:49,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:57:49,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904862438] [2023-11-26 11:57:49,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:57:49,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 11:57:49,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:50,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 11:57:50,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:57:50,039 INFO L87 Difference]: Start difference. First operand has 213 states, 131 states have (on average 1.5725190839694656) internal successors, (206), 132 states have internal predecessors, (206), 79 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) Second operand has 2 states, 2 states have (on average 50.0) internal successors, (100), 2 states have internal predecessors, (100), 2 states have call successors, (79), 2 states have call predecessors, (79), 1 states have return successors, (79), 1 states have call predecessors, (79), 2 states have call successors, (79) [2023-11-26 11:57:50,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:50,177 INFO L93 Difference]: Finished difference Result 422 states and 803 transitions. [2023-11-26 11:57:50,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 11:57:50,181 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 50.0) internal successors, (100), 2 states have internal predecessors, (100), 2 states have call successors, (79), 2 states have call predecessors, (79), 1 states have return successors, (79), 1 states have call predecessors, (79), 2 states have call successors, (79) Word has length 490 [2023-11-26 11:57:50,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:50,201 INFO L225 Difference]: With dead ends: 422 [2023-11-26 11:57:50,201 INFO L226 Difference]: Without dead ends: 210 [2023-11-26 11:57:50,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 489 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 11:57:50,223 INFO L413 NwaCegarLoop]: 351 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, 351 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 11:57:50,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 351 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:57:50,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2023-11-26 11:57:50,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2023-11-26 11:57:50,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 129 states have (on average 1.5193798449612403) internal successors, (196), 129 states have internal predecessors, (196), 79 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2023-11-26 11:57:50,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 354 transitions. [2023-11-26 11:57:50,355 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 354 transitions. Word has length 490 [2023-11-26 11:57:50,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:50,358 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 354 transitions. [2023-11-26 11:57:50,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 50.0) internal successors, (100), 2 states have internal predecessors, (100), 2 states have call successors, (79), 2 states have call predecessors, (79), 1 states have return successors, (79), 1 states have call predecessors, (79), 2 states have call successors, (79) [2023-11-26 11:57:50,359 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 354 transitions. [2023-11-26 11:57:50,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2023-11-26 11:57:50,380 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:50,381 INFO L195 NwaCegarLoop]: trace histogram [79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:57:50,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02d3b7ea-83bb-48c9-ae4e-c0646e45c4bd/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 11:57:50,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02d3b7ea-83bb-48c9-ae4e-c0646e45c4bd/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:50,593 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:57:50,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:50,596 INFO L85 PathProgramCache]: Analyzing trace with hash -498030948, now seen corresponding path program 1 times [2023-11-26 11:57:50,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:50,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979845682] [2023-11-26 11:57:50,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:50,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:50,772 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:57:50,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1685509788] [2023-11-26 11:57:50,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:50,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:50,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02d3b7ea-83bb-48c9-ae4e-c0646e45c4bd/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:50,775 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02d3b7ea-83bb-48c9-ae4e-c0646e45c4bd/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:57:50,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02d3b7ea-83bb-48c9-ae4e-c0646e45c4bd/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:57:51,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:51,201 INFO L262 TraceCheckSpWp]: Trace formula consists of 1098 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 11:57:51,216 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:51,322 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12324 trivial. 0 not checked. [2023-11-26 11:57:51,323 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:57:51,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:51,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979845682] [2023-11-26 11:57:51,323 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:57:51,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685509788] [2023-11-26 11:57:51,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685509788] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:57:51,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:57:51,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:57:51,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798604337] [2023-11-26 11:57:51,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:57:51,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:57:51,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:51,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:57:51,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:57:51,335 INFO L87 Difference]: Start difference. First operand 210 states and 354 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 1 states have call predecessors, (79), 1 states have call successors, (79) [2023-11-26 11:57:51,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:51,511 INFO L93 Difference]: Finished difference Result 550 states and 928 transitions. [2023-11-26 11:57:51,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:57:51,512 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 1 states have call predecessors, (79), 1 states have call successors, (79) Word has length 491 [2023-11-26 11:57:51,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:51,519 INFO L225 Difference]: With dead ends: 550 [2023-11-26 11:57:51,519 INFO L226 Difference]: Without dead ends: 341 [2023-11-26 11:57:51,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 489 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 11:57:51,522 INFO L413 NwaCegarLoop]: 453 mSDtfsCounter, 216 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 773 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:51,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 773 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:57:51,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2023-11-26 11:57:51,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 338. [2023-11-26 11:57:51,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 219 states have (on average 1.5251141552511416) internal successors, (334), 220 states have internal predecessors, (334), 116 states have call successors, (116), 2 states have call predecessors, (116), 2 states have return successors, (116), 115 states have call predecessors, (116), 116 states have call successors, (116) [2023-11-26 11:57:51,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 566 transitions. [2023-11-26 11:57:51,585 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 566 transitions. Word has length 491 [2023-11-26 11:57:51,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:51,588 INFO L495 AbstractCegarLoop]: Abstraction has 338 states and 566 transitions. [2023-11-26 11:57:51,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 1 states have call predecessors, (79), 1 states have call successors, (79) [2023-11-26 11:57:51,589 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 566 transitions. [2023-11-26 11:57:51,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2023-11-26 11:57:51,594 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:51,594 INFO L195 NwaCegarLoop]: trace histogram [79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:57:51,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02d3b7ea-83bb-48c9-ae4e-c0646e45c4bd/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:57:51,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02d3b7ea-83bb-48c9-ae4e-c0646e45c4bd/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:51,804 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:57:51,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:51,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1634889186, now seen corresponding path program 1 times [2023-11-26 11:57:51,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:51,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139010198] [2023-11-26 11:57:51,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:51,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:51,913 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:57:51,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1862575448] [2023-11-26 11:57:51,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:51,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:51,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02d3b7ea-83bb-48c9-ae4e-c0646e45c4bd/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:51,926 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02d3b7ea-83bb-48c9-ae4e-c0646e45c4bd/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:57:51,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02d3b7ea-83bb-48c9-ae4e-c0646e45c4bd/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:57:52,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:52,284 INFO L262 TraceCheckSpWp]: Trace formula consists of 1097 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 11:57:52,295 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:52,338 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12324 trivial. 0 not checked. [2023-11-26 11:57:52,338 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:57:52,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:52,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139010198] [2023-11-26 11:57:52,339 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:57:52,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862575448] [2023-11-26 11:57:52,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862575448] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:57:52,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:57:52,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:57:52,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739444167] [2023-11-26 11:57:52,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:57:52,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:57:52,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:52,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:57:52,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:57:52,345 INFO L87 Difference]: Start difference. First operand 338 states and 566 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 1 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 1 states have call predecessors, (79), 1 states have call successors, (79) [2023-11-26 11:57:52,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:52,411 INFO L93 Difference]: Finished difference Result 677 states and 1135 transitions. [2023-11-26 11:57:52,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:57:52,412 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 1 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 1 states have call predecessors, (79), 1 states have call successors, (79) Word has length 492 [2023-11-26 11:57:52,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:52,423 INFO L225 Difference]: With dead ends: 677 [2023-11-26 11:57:52,423 INFO L226 Difference]: Without dead ends: 340 [2023-11-26 11:57:52,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 490 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 11:57:52,429 INFO L413 NwaCegarLoop]: 350 mSDtfsCounter, 0 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 694 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:52,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 694 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:57:52,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2023-11-26 11:57:52,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 340. [2023-11-26 11:57:52,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 221 states have (on average 1.5203619909502262) internal successors, (336), 222 states have internal predecessors, (336), 116 states have call successors, (116), 2 states have call predecessors, (116), 2 states have return successors, (116), 115 states have call predecessors, (116), 116 states have call successors, (116) [2023-11-26 11:57:52,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 568 transitions. [2023-11-26 11:57:52,519 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 568 transitions. Word has length 492 [2023-11-26 11:57:52,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:52,530 INFO L495 AbstractCegarLoop]: Abstraction has 340 states and 568 transitions. [2023-11-26 11:57:52,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 1 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 1 states have call predecessors, (79), 1 states have call successors, (79) [2023-11-26 11:57:52,530 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 568 transitions. [2023-11-26 11:57:52,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2023-11-26 11:57:52,537 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:52,538 INFO L195 NwaCegarLoop]: trace histogram [79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:57:52,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02d3b7ea-83bb-48c9-ae4e-c0646e45c4bd/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 11:57:52,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02d3b7ea-83bb-48c9-ae4e-c0646e45c4bd/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:52,753 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:57:52,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:52,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1958478236, now seen corresponding path program 1 times [2023-11-26 11:57:52,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:52,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073626125] [2023-11-26 11:57:52,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:52,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:52,843 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:57:52,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1572376956] [2023-11-26 11:57:52,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:52,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:52,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02d3b7ea-83bb-48c9-ae4e-c0646e45c4bd/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:52,845 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02d3b7ea-83bb-48c9-ae4e-c0646e45c4bd/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:57:52,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02d3b7ea-83bb-48c9-ae4e-c0646e45c4bd/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:57:53,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:53,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 1095 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:57:53,216 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:53,415 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 1950 proven. 18 refuted. 0 times theorem prover too weak. 10356 trivial. 0 not checked. [2023-11-26 11:57:53,416 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:57:53,883 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 216 proven. 18 refuted. 0 times theorem prover too weak. 12090 trivial. 0 not checked. [2023-11-26 11:57:53,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:53,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073626125] [2023-11-26 11:57:53,886 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:57:53,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572376956] [2023-11-26 11:57:53,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572376956] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:57:53,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:57:53,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-26 11:57:53,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248640350] [2023-11-26 11:57:53,888 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:57:53,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:57:53,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:53,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:57:53,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:57:53,893 INFO L87 Difference]: Start difference. First operand 340 states and 568 transitions. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 2 states have call successors, (85), 2 states have call predecessors, (85), 4 states have return successors, (86), 2 states have call predecessors, (86), 2 states have call successors, (86) [2023-11-26 11:57:54,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:54,661 INFO L93 Difference]: Finished difference Result 689 states and 1144 transitions. [2023-11-26 11:57:54,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:57:54,663 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 2 states have call successors, (85), 2 states have call predecessors, (85), 4 states have return successors, (86), 2 states have call predecessors, (86), 2 states have call successors, (86) Word has length 492 [2023-11-26 11:57:54,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:54,667 INFO L225 Difference]: With dead ends: 689 [2023-11-26 11:57:54,668 INFO L226 Difference]: Without dead ends: 350 [2023-11-26 11:57:54,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 986 GetRequests, 976 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 11:57:54,671 INFO L413 NwaCegarLoop]: 268 mSDtfsCounter, 380 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 643 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:54,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [451 Valid, 643 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-26 11:57:54,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2023-11-26 11:57:54,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 344. [2023-11-26 11:57:54,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 224 states have (on average 1.5044642857142858) internal successors, (337), 225 states have internal predecessors, (337), 116 states have call successors, (116), 3 states have call predecessors, (116), 3 states have return successors, (116), 115 states have call predecessors, (116), 116 states have call successors, (116) [2023-11-26 11:57:54,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 569 transitions. [2023-11-26 11:57:54,721 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 569 transitions. Word has length 492 [2023-11-26 11:57:54,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:54,722 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 569 transitions. [2023-11-26 11:57:54,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 2 states have call successors, (85), 2 states have call predecessors, (85), 4 states have return successors, (86), 2 states have call predecessors, (86), 2 states have call successors, (86) [2023-11-26 11:57:54,723 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 569 transitions. [2023-11-26 11:57:54,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2023-11-26 11:57:54,729 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:54,729 INFO L195 NwaCegarLoop]: trace histogram [79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:57:54,741 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02d3b7ea-83bb-48c9-ae4e-c0646e45c4bd/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-26 11:57:54,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02d3b7ea-83bb-48c9-ae4e-c0646e45c4bd/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-11-26 11:57:54,941 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:57:54,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:54,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1056625382, now seen corresponding path program 1 times [2023-11-26 11:57:54,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:54,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941243655] [2023-11-26 11:57:54,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:54,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:55,027 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:57:55,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1060670989] [2023-11-26 11:57:55,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:55,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:55,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02d3b7ea-83bb-48c9-ae4e-c0646e45c4bd/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:55,030 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02d3b7ea-83bb-48c9-ae4e-c0646e45c4bd/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:57:55,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02d3b7ea-83bb-48c9-ae4e-c0646e45c4bd/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:57:55,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:55,440 INFO L262 TraceCheckSpWp]: Trace formula consists of 1094 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 11:57:55,456 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:56,468 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 1818 proven. 216 refuted. 0 times theorem prover too weak. 10290 trivial. 0 not checked. [2023-11-26 11:57:56,469 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:57:57,141 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 18 proven. 216 refuted. 0 times theorem prover too weak. 12090 trivial. 0 not checked. [2023-11-26 11:57:57,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:57,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941243655] [2023-11-26 11:57:57,142 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:57:57,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060670989] [2023-11-26 11:57:57,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060670989] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:57:57,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:57:57,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-11-26 11:57:57,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500562427] [2023-11-26 11:57:57,149 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:57:57,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 11:57:57,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:57,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 11:57:57,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:57:57,153 INFO L87 Difference]: Start difference. First operand 344 states and 569 transitions. Second operand has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 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 11:57:57,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:57,860 INFO L93 Difference]: Finished difference Result 739 states and 1208 transitions. [2023-11-26 11:57:57,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:57:57,861 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 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 492 [2023-11-26 11:57:57,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:57,866 INFO L225 Difference]: With dead ends: 739 [2023-11-26 11:57:57,866 INFO L226 Difference]: Without dead ends: 396 [2023-11-26 11:57:57,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 986 GetRequests, 974 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2023-11-26 11:57:57,869 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 151 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 865 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:57,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 865 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-26 11:57:57,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2023-11-26 11:57:57,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 354. [2023-11-26 11:57:57,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 232 states have (on average 1.4870689655172413) internal successors, (345), 233 states have internal predecessors, (345), 116 states have call successors, (116), 5 states have call predecessors, (116), 5 states have return successors, (116), 115 states have call predecessors, (116), 116 states have call successors, (116) [2023-11-26 11:57:57,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 577 transitions. [2023-11-26 11:57:57,922 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 577 transitions. Word has length 492 [2023-11-26 11:57:57,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:57,924 INFO L495 AbstractCegarLoop]: Abstraction has 354 states and 577 transitions. [2023-11-26 11:57:57,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 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 11:57:57,925 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 577 transitions. [2023-11-26 11:57:57,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2023-11-26 11:57:57,929 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:57,931 INFO L195 NwaCegarLoop]: trace histogram [79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:57:57,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02d3b7ea-83bb-48c9-ae4e-c0646e45c4bd/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 11:57:58,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02d3b7ea-83bb-48c9-ae4e-c0646e45c4bd/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:58,140 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:57:58,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:58,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1298550719, now seen corresponding path program 1 times [2023-11-26 11:57:58,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:58,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640952917] [2023-11-26 11:57:58,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:58,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:58,216 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:57:58,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1728923967] [2023-11-26 11:57:58,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:58,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:58,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02d3b7ea-83bb-48c9-ae4e-c0646e45c4bd/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:58,237 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02d3b7ea-83bb-48c9-ae4e-c0646e45c4bd/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:57:58,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02d3b7ea-83bb-48c9-ae4e-c0646e45c4bd/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 11:57:58,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:58,600 INFO L262 TraceCheckSpWp]: Trace formula consists of 1096 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-26 11:57:58,612 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:58:02,077 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 690 proven. 228 refuted. 0 times theorem prover too weak. 11406 trivial. 0 not checked. [2023-11-26 11:58:02,078 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:58:03,997 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 6 proven. 228 refuted. 0 times theorem prover too weak. 12090 trivial. 0 not checked. [2023-11-26 11:58:03,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:58:03,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640952917] [2023-11-26 11:58:03,999 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:58:03,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728923967] [2023-11-26 11:58:03,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728923967] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:58:03,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:58:04,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-11-26 11:58:04,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488731023] [2023-11-26 11:58:04,000 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:58:04,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-26 11:58:04,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:58:04,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-26 11:58:04,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2023-11-26 11:58:04,004 INFO L87 Difference]: Start difference. First operand 354 states and 577 transitions. Second operand has 14 states, 14 states have (on average 14.642857142857142) internal successors, (205), 14 states have internal predecessors, (205), 4 states have call successors, (158), 3 states have call predecessors, (158), 5 states have return successors, (158), 4 states have call predecessors, (158), 4 states have call successors, (158) [2023-11-26 11:58:07,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:58:07,305 INFO L93 Difference]: Finished difference Result 1601 states and 2559 transitions. [2023-11-26 11:58:07,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-26 11:58:07,306 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 14.642857142857142) internal successors, (205), 14 states have internal predecessors, (205), 4 states have call successors, (158), 3 states have call predecessors, (158), 5 states have return successors, (158), 4 states have call predecessors, (158), 4 states have call successors, (158) Word has length 493 [2023-11-26 11:58:07,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:58:07,319 INFO L225 Difference]: With dead ends: 1601 [2023-11-26 11:58:07,319 INFO L226 Difference]: Without dead ends: 1248 [2023-11-26 11:58:07,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1000 GetRequests, 976 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=237, Invalid=413, Unknown=0, NotChecked=0, Total=650 [2023-11-26 11:58:07,323 INFO L413 NwaCegarLoop]: 297 mSDtfsCounter, 1343 mSDsluCounter, 1730 mSDsCounter, 0 mSdLazyCounter, 1789 mSolverCounterSat, 756 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1419 SdHoareTripleChecker+Valid, 2027 SdHoareTripleChecker+Invalid, 2545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 756 IncrementalHoareTripleChecker+Valid, 1789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-11-26 11:58:07,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1419 Valid, 2027 Invalid, 2545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [756 Valid, 1789 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-11-26 11:58:07,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2023-11-26 11:58:07,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 1134. [2023-11-26 11:58:07,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1134 states, 760 states have (on average 1.4539473684210527) internal successors, (1105), 765 states have internal predecessors, (1105), 352 states have call successors, (352), 21 states have call predecessors, (352), 21 states have return successors, (352), 347 states have call predecessors, (352), 352 states have call successors, (352) [2023-11-26 11:58:07,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1134 states to 1134 states and 1809 transitions. [2023-11-26 11:58:07,529 INFO L78 Accepts]: Start accepts. Automaton has 1134 states and 1809 transitions. Word has length 493 [2023-11-26 11:58:07,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:58:07,530 INFO L495 AbstractCegarLoop]: Abstraction has 1134 states and 1809 transitions. [2023-11-26 11:58:07,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 14.642857142857142) internal successors, (205), 14 states have internal predecessors, (205), 4 states have call successors, (158), 3 states have call predecessors, (158), 5 states have return successors, (158), 4 states have call predecessors, (158), 4 states have call successors, (158) [2023-11-26 11:58:07,531 INFO L276 IsEmpty]: Start isEmpty. Operand 1134 states and 1809 transitions. [2023-11-26 11:58:07,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2023-11-26 11:58:07,536 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:58:07,536 INFO L195 NwaCegarLoop]: trace histogram [79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:58:07,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02d3b7ea-83bb-48c9-ae4e-c0646e45c4bd/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 11:58:07,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02d3b7ea-83bb-48c9-ae4e-c0646e45c4bd/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:58:07,744 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:58:07,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:58:07,745 INFO L85 PathProgramCache]: Analyzing trace with hash 507893337, now seen corresponding path program 1 times [2023-11-26 11:58:07,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:58:07,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747754662] [2023-11-26 11:58:07,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:07,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:58:07,820 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:58:07,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [784031885] [2023-11-26 11:58:07,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:07,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:58:07,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02d3b7ea-83bb-48c9-ae4e-c0646e45c4bd/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:58:07,822 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02d3b7ea-83bb-48c9-ae4e-c0646e45c4bd/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:58:07,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02d3b7ea-83bb-48c9-ae4e-c0646e45c4bd/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 11:58:08,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:58:08,197 INFO L262 TraceCheckSpWp]: Trace formula consists of 1098 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 11:58:08,207 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:58:08,941 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12324 trivial. 0 not checked. [2023-11-26 11:58:08,942 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:58:08,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:58:08,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747754662] [2023-11-26 11:58:08,942 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:58:08,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784031885] [2023-11-26 11:58:08,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784031885] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:58:08,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:58:08,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:58:08,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293070495] [2023-11-26 11:58:08,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:58:08,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:58:08,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:58:08,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:58:08,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:58:08,950 INFO L87 Difference]: Start difference. First operand 1134 states and 1809 transitions. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 3 states have internal predecessors, (101), 1 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 1 states have call predecessors, (79), 1 states have call successors, (79) [2023-11-26 11:58:09,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:58:09,453 INFO L93 Difference]: Finished difference Result 2211 states and 3528 transitions. [2023-11-26 11:58:09,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:58:09,454 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 3 states have internal predecessors, (101), 1 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 1 states have call predecessors, (79), 1 states have call successors, (79) Word has length 493 [2023-11-26 11:58:09,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:58:09,473 INFO L225 Difference]: With dead ends: 2211 [2023-11-26 11:58:09,473 INFO L226 Difference]: Without dead ends: 1459 [2023-11-26 11:58:09,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 490 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 11:58:09,480 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 269 mSDsluCounter, 690 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 1037 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:58:09,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 1037 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 11:58:09,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1459 states. [2023-11-26 11:58:09,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1459 to 1389. [2023-11-26 11:58:09,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1389 states, 932 states have (on average 1.463519313304721) internal successors, (1364), 937 states have internal predecessors, (1364), 431 states have call successors, (431), 25 states have call predecessors, (431), 25 states have return successors, (431), 426 states have call predecessors, (431), 431 states have call successors, (431) [2023-11-26 11:58:09,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1389 states to 1389 states and 2226 transitions. [2023-11-26 11:58:09,769 INFO L78 Accepts]: Start accepts. Automaton has 1389 states and 2226 transitions. Word has length 493 [2023-11-26 11:58:09,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:58:09,771 INFO L495 AbstractCegarLoop]: Abstraction has 1389 states and 2226 transitions. [2023-11-26 11:58:09,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 3 states have internal predecessors, (101), 1 states have call successors, (79), 1 states have call predecessors, (79), 1 states have return successors, (79), 1 states have call predecessors, (79), 1 states have call successors, (79) [2023-11-26 11:58:09,771 INFO L276 IsEmpty]: Start isEmpty. Operand 1389 states and 2226 transitions. [2023-11-26 11:58:09,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2023-11-26 11:58:09,775 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:58:09,776 INFO L195 NwaCegarLoop]: trace histogram [79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:58:09,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02d3b7ea-83bb-48c9-ae4e-c0646e45c4bd/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 11:58:09,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02d3b7ea-83bb-48c9-ae4e-c0646e45c4bd/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:58:09,984 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:58:09,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:58:09,985 INFO L85 PathProgramCache]: Analyzing trace with hash 887354881, now seen corresponding path program 1 times [2023-11-26 11:58:09,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:58:09,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863403995] [2023-11-26 11:58:09,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:09,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:58:10,049 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:58:10,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [998828653] [2023-11-26 11:58:10,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:10,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:58:10,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02d3b7ea-83bb-48c9-ae4e-c0646e45c4bd/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:58:10,051 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02d3b7ea-83bb-48c9-ae4e-c0646e45c4bd/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:58:10,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02d3b7ea-83bb-48c9-ae4e-c0646e45c4bd/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 11:58:10,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:58:10,459 INFO L262 TraceCheckSpWp]: Trace formula consists of 1098 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-26 11:58:10,470 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:58:12,326 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 5536 proven. 324 refuted. 0 times theorem prover too weak. 6464 trivial. 0 not checked. [2023-11-26 11:58:12,327 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:58:13,292 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 75 proven. 159 refuted. 0 times theorem prover too weak. 12090 trivial. 0 not checked. [2023-11-26 11:58:13,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:58:13,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863403995] [2023-11-26 11:58:13,293 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:58:13,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998828653] [2023-11-26 11:58:13,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998828653] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:58:13,293 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:58:13,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2023-11-26 11:58:13,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170342747] [2023-11-26 11:58:13,294 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:58:13,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-26 11:58:13,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:58:13,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-26 11:58:13,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2023-11-26 11:58:13,298 INFO L87 Difference]: Start difference. First operand 1389 states and 2226 transitions. Second operand has 17 states, 17 states have (on average 9.352941176470589) internal successors, (159), 17 states have internal predecessors, (159), 4 states have call successors, (135), 3 states have call predecessors, (135), 6 states have return successors, (136), 4 states have call predecessors, (136), 4 states have call successors, (136) [2023-11-26 11:58:30,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:58:30,080 INFO L93 Difference]: Finished difference Result 6343 states and 9845 transitions. [2023-11-26 11:58:30,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-11-26 11:58:30,081 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 9.352941176470589) internal successors, (159), 17 states have internal predecessors, (159), 4 states have call successors, (135), 3 states have call predecessors, (135), 6 states have return successors, (136), 4 states have call predecessors, (136), 4 states have call successors, (136) Word has length 494 [2023-11-26 11:58:30,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:58:30,118 INFO L225 Difference]: With dead ends: 6343 [2023-11-26 11:58:30,119 INFO L226 Difference]: Without dead ends: 5115 [2023-11-26 11:58:30,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1049 GetRequests, 976 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1938 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=1277, Invalid=4273, Unknown=0, NotChecked=0, Total=5550 [2023-11-26 11:58:30,129 INFO L413 NwaCegarLoop]: 407 mSDtfsCounter, 1498 mSDsluCounter, 1655 mSDsCounter, 0 mSdLazyCounter, 2114 mSolverCounterSat, 946 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1521 SdHoareTripleChecker+Valid, 2062 SdHoareTripleChecker+Invalid, 3060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 946 IncrementalHoareTripleChecker+Valid, 2114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:58:30,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1521 Valid, 2062 Invalid, 3060 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [946 Valid, 2114 Invalid, 0 Unknown, 0 Unchecked, 10.2s Time] [2023-11-26 11:58:30,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5115 states. [2023-11-26 11:58:30,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5115 to 1545. [2023-11-26 11:58:30,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1545 states, 1067 states have (on average 1.4348641049671977) internal successors, (1531), 1072 states have internal predecessors, (1531), 431 states have call successors, (431), 46 states have call predecessors, (431), 46 states have return successors, (431), 426 states have call predecessors, (431), 431 states have call successors, (431) [2023-11-26 11:58:30,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1545 states to 1545 states and 2393 transitions. [2023-11-26 11:58:30,711 INFO L78 Accepts]: Start accepts. Automaton has 1545 states and 2393 transitions. Word has length 494 [2023-11-26 11:58:30,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:58:30,713 INFO L495 AbstractCegarLoop]: Abstraction has 1545 states and 2393 transitions. [2023-11-26 11:58:30,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 9.352941176470589) internal successors, (159), 17 states have internal predecessors, (159), 4 states have call successors, (135), 3 states have call predecessors, (135), 6 states have return successors, (136), 4 states have call predecessors, (136), 4 states have call successors, (136) [2023-11-26 11:58:30,714 INFO L276 IsEmpty]: Start isEmpty. Operand 1545 states and 2393 transitions. [2023-11-26 11:58:30,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2023-11-26 11:58:30,718 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:58:30,719 INFO L195 NwaCegarLoop]: trace histogram [79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:58:30,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02d3b7ea-83bb-48c9-ae4e-c0646e45c4bd/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 11:58:30,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02d3b7ea-83bb-48c9-ae4e-c0646e45c4bd/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:58:30,928 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:58:30,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:58:30,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1468450369, now seen corresponding path program 1 times [2023-11-26 11:58:30,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:58:30,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974059524] [2023-11-26 11:58:30,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:30,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:58:31,024 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:58:31,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1147610866] [2023-11-26 11:58:31,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:31,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:58:31,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02d3b7ea-83bb-48c9-ae4e-c0646e45c4bd/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:58:31,045 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02d3b7ea-83bb-48c9-ae4e-c0646e45c4bd/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:58:31,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02d3b7ea-83bb-48c9-ae4e-c0646e45c4bd/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 11:58:31,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:58:31,514 INFO L262 TraceCheckSpWp]: Trace formula consists of 1096 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-26 11:58:31,529 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:58:33,295 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 5428 proven. 159 refuted. 0 times theorem prover too weak. 6737 trivial. 0 not checked. [2023-11-26 11:58:33,295 INFO L327 TraceCheckSpWp]: Computing backward predicates...