./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/s52if.c --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_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/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_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/s52if.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/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_710833fa-42e4-4094-a44e-12356f1e6630/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 adec1fb94d6967416fde705f346e339b2564f221f40b7d50198f8ed5e502aa54 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 12:06:34,288 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 12:06:34,381 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 12:06:34,386 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 12:06:34,387 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 12:06:34,415 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 12:06:34,415 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 12:06:34,416 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 12:06:34,417 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 12:06:34,418 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 12:06:34,418 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 12:06:34,419 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 12:06:34,420 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 12:06:34,421 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 12:06:34,421 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 12:06:34,422 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 12:06:34,423 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 12:06:34,423 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 12:06:34,424 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 12:06:34,424 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 12:06:34,425 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 12:06:34,425 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 12:06:34,426 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 12:06:34,426 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 12:06:34,427 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 12:06:34,427 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 12:06:34,428 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 12:06:34,429 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 12:06:34,429 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 12:06:34,430 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 12:06:34,430 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 12:06:34,431 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 12:06:34,431 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 12:06:34,432 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 12:06:34,432 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 12:06:34,433 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 12:06:34,433 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 12:06:34,434 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 12:06:34,434 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 12:06:34,435 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 12:06:34,435 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 12:06:34,436 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 12:06:34,436 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_710833fa-42e4-4094-a44e-12356f1e6630/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> adec1fb94d6967416fde705f346e339b2564f221f40b7d50198f8ed5e502aa54 [2023-11-26 12:06:34,683 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 12:06:34,718 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 12:06:34,721 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 12:06:34,724 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 12:06:34,724 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 12:06:34,725 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/array-fpi/s52if.c [2023-11-26 12:06:37,899 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 12:06:38,108 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 12:06:38,108 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/sv-benchmarks/c/array-fpi/s52if.c [2023-11-26 12:06:38,117 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/data/a899c231e/80182a2fe4fd403fb58a23dc09659253/FLAGf871078c6 [2023-11-26 12:06:38,133 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/data/a899c231e/80182a2fe4fd403fb58a23dc09659253 [2023-11-26 12:06:38,136 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 12:06:38,138 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 12:06:38,140 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 12:06:38,140 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 12:06:38,147 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 12:06:38,148 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:06:38" (1/1) ... [2023-11-26 12:06:38,149 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ebdbd0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:06:38, skipping insertion in model container [2023-11-26 12:06:38,150 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:06:38" (1/1) ... [2023-11-26 12:06:38,178 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 12:06:38,334 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_710833fa-42e4-4094-a44e-12356f1e6630/sv-benchmarks/c/array-fpi/s52if.c[588,601] [2023-11-26 12:06:38,359 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 12:06:38,370 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 12:06:38,385 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_710833fa-42e4-4094-a44e-12356f1e6630/sv-benchmarks/c/array-fpi/s52if.c[588,601] [2023-11-26 12:06:38,396 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 12:06:38,410 INFO L206 MainTranslator]: Completed translation [2023-11-26 12:06:38,411 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:06:38 WrapperNode [2023-11-26 12:06:38,411 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 12:06:38,412 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 12:06:38,413 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 12:06:38,413 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 12:06:38,421 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:06:38" (1/1) ... [2023-11-26 12:06:38,429 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:06:38" (1/1) ... [2023-11-26 12:06:38,456 INFO L138 Inliner]: procedures = 17, calls = 36, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 98 [2023-11-26 12:06:38,456 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 12:06:38,457 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 12:06:38,457 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 12:06:38,458 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 12:06:38,470 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:06:38" (1/1) ... [2023-11-26 12:06:38,471 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:06:38" (1/1) ... [2023-11-26 12:06:38,474 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:06:38" (1/1) ... [2023-11-26 12:06:38,491 INFO L175 MemorySlicer]: Split 25 memory accesses to 4 slices as follows [2, 8, 6, 9]. 36 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0, 0]. The 6 writes are split as follows [0, 0, 3, 3]. [2023-11-26 12:06:38,491 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:06:38" (1/1) ... [2023-11-26 12:06:38,491 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:06:38" (1/1) ... [2023-11-26 12:06:38,506 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:06:38" (1/1) ... [2023-11-26 12:06:38,510 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:06:38" (1/1) ... [2023-11-26 12:06:38,512 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:06:38" (1/1) ... [2023-11-26 12:06:38,517 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:06:38" (1/1) ... [2023-11-26 12:06:38,520 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 12:06:38,533 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 12:06:38,533 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 12:06:38,533 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 12:06:38,534 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:06:38" (1/1) ... [2023-11-26 12:06:38,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 12:06:38,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:06:38,568 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 12:06:38,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 12:06:38,615 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 12:06:38,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 12:06:38,617 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 12:06:38,617 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 12:06:38,617 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-26 12:06:38,617 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 12:06:38,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 12:06:38,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 12:06:38,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 12:06:38,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-26 12:06:38,621 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-26 12:06:38,621 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 12:06:38,621 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 12:06:38,621 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 12:06:38,621 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 12:06:38,621 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 12:06:38,622 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-26 12:06:38,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 12:06:38,754 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 12:06:38,764 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 12:06:39,005 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 12:06:39,045 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 12:06:39,045 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-26 12:06:39,046 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:06:39 BoogieIcfgContainer [2023-11-26 12:06:39,046 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 12:06:39,061 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 12:06:39,061 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 12:06:39,065 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 12:06:39,065 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:06:38" (1/3) ... [2023-11-26 12:06:39,067 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cef862d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:06:39, skipping insertion in model container [2023-11-26 12:06:39,067 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:06:38" (2/3) ... [2023-11-26 12:06:39,069 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cef862d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:06:39, skipping insertion in model container [2023-11-26 12:06:39,069 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:06:39" (3/3) ... [2023-11-26 12:06:39,070 INFO L112 eAbstractionObserver]: Analyzing ICFG s52if.c [2023-11-26 12:06:39,096 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 12:06:39,096 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 12:06:39,191 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 12:06:39,199 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;@540f9ee8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 12:06:39,199 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 12:06:39,204 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:06:39,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-26 12:06:39,211 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:06:39,211 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:06:39,212 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:06:39,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:06:39,218 INFO L85 PathProgramCache]: Analyzing trace with hash 845365045, now seen corresponding path program 1 times [2023-11-26 12:06:39,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:06:39,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916819031] [2023-11-26 12:06:39,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:06:39,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:06:39,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:06:39,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:06:39,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:06:39,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916819031] [2023-11-26 12:06:39,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916819031] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:06:39,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:06:39,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 12:06:39,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250904922] [2023-11-26 12:06:39,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:06:39,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 12:06:39,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:06:39,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 12:06:39,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 12:06:39,479 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:06:39,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:06:39,503 INFO L93 Difference]: Finished difference Result 37 states and 55 transitions. [2023-11-26 12:06:39,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 12:06:39,510 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-26 12:06:39,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:06:39,519 INFO L225 Difference]: With dead ends: 37 [2023-11-26 12:06:39,520 INFO L226 Difference]: Without dead ends: 17 [2023-11-26 12:06:39,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 12:06:39,526 INFO L413 NwaCegarLoop]: 22 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, 22 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 12:06:39,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 12:06:39,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-26 12:06:39,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-11-26 12:06:39,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:06:39,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2023-11-26 12:06:39,563 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 12 [2023-11-26 12:06:39,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:06:39,563 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2023-11-26 12:06:39,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:06:39,564 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2023-11-26 12:06:39,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-26 12:06:39,565 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:06:39,565 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:06:39,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 12:06:39,566 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:06:39,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:06:39,567 INFO L85 PathProgramCache]: Analyzing trace with hash 452010334, now seen corresponding path program 1 times [2023-11-26 12:06:39,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:06:39,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237154257] [2023-11-26 12:06:39,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:06:39,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:06:39,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:06:39,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:06:39,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:06:39,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237154257] [2023-11-26 12:06:39,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237154257] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:06:39,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:06:39,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 12:06:39,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069998582] [2023-11-26 12:06:39,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:06:39,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 12:06:39,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:06:39,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 12:06:39,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 12:06:39,815 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:06:39,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:06:39,903 INFO L93 Difference]: Finished difference Result 36 states and 48 transitions. [2023-11-26 12:06:39,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 12:06:39,904 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-26 12:06:39,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:06:39,905 INFO L225 Difference]: With dead ends: 36 [2023-11-26 12:06:39,905 INFO L226 Difference]: Without dead ends: 24 [2023-11-26 12:06:39,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 12:06:39,907 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 32 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 12:06:39,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 9 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 12:06:39,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-26 12:06:39,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2023-11-26 12:06:39,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:06:39,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2023-11-26 12:06:39,916 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 12 [2023-11-26 12:06:39,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:06:39,916 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2023-11-26 12:06:39,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:06:39,917 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2023-11-26 12:06:39,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-26 12:06:39,918 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:06:39,918 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:06:39,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 12:06:39,919 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:06:39,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:06:39,920 INFO L85 PathProgramCache]: Analyzing trace with hash 678183220, now seen corresponding path program 1 times [2023-11-26 12:06:39,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:06:39,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579747689] [2023-11-26 12:06:39,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:06:39,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:06:40,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:06:40,665 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 12:06:40,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:06:40,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579747689] [2023-11-26 12:06:40,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579747689] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:06:40,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016852957] [2023-11-26 12:06:40,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:06:40,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:06:40,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:06:40,672 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:06:40,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 12:06:40,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:06:40,834 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-26 12:06:40,843 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:06:41,073 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-26 12:06:41,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-26 12:06:41,318 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 12:06:41,318 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:06:41,522 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 12:06:41,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016852957] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:06:41,523 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:06:41,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2023-11-26 12:06:41,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609111773] [2023-11-26 12:06:41,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:06:41,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-26 12:06:41,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:06:41,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-26 12:06:41,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2023-11-26 12:06:41,528 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:06:42,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:06:42,053 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2023-11-26 12:06:42,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-26 12:06:42,054 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-26 12:06:42,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:06:42,055 INFO L225 Difference]: With dead ends: 47 [2023-11-26 12:06:42,055 INFO L226 Difference]: Without dead ends: 43 [2023-11-26 12:06:42,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=227, Invalid=765, Unknown=0, NotChecked=0, Total=992 [2023-11-26 12:06:42,057 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 125 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 12:06:42,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 37 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 12:06:42,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-11-26 12:06:42,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2023-11-26 12:06:42,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 31 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:06:42,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2023-11-26 12:06:42,068 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 19 [2023-11-26 12:06:42,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:06:42,069 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2023-11-26 12:06:42,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:06:42,069 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2023-11-26 12:06:42,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-26 12:06:42,070 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:06:42,070 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:06:42,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 12:06:42,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:06:42,279 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:06:42,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:06:42,280 INFO L85 PathProgramCache]: Analyzing trace with hash 735441522, now seen corresponding path program 1 times [2023-11-26 12:06:42,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:06:42,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999001338] [2023-11-26 12:06:42,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:06:42,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:06:42,300 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:06:42,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [816832544] [2023-11-26 12:06:42,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:06:42,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:06:42,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:06:42,302 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:06:42,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 12:06:42,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:06:42,392 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-26 12:06:42,396 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:06:42,462 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-26 12:06:42,528 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 12:06:42,529 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:06:42,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2023-11-26 12:06:42,628 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-26 12:06:42,629 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 16 [2023-11-26 12:06:42,641 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 12:06:42,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:06:42,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999001338] [2023-11-26 12:06:42,644 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:06:42,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816832544] [2023-11-26 12:06:42,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816832544] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:06:42,644 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 12:06:42,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-11-26 12:06:42,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910625584] [2023-11-26 12:06:42,645 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 12:06:42,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-26 12:06:42,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:06:42,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-26 12:06:42,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-11-26 12:06:42,649 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:06:42,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:06:42,848 INFO L93 Difference]: Finished difference Result 89 states and 115 transitions. [2023-11-26 12:06:42,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 12:06:42,849 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-26 12:06:42,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:06:42,851 INFO L225 Difference]: With dead ends: 89 [2023-11-26 12:06:42,851 INFO L226 Difference]: Without dead ends: 77 [2023-11-26 12:06:42,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-11-26 12:06:42,854 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 90 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 12:06:42,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 70 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 12:06:42,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-11-26 12:06:42,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 44. [2023-11-26 12:06:42,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:06:42,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 57 transitions. [2023-11-26 12:06:42,884 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 57 transitions. Word has length 19 [2023-11-26 12:06:42,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:06:42,884 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 57 transitions. [2023-11-26 12:06:42,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:06:42,887 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 57 transitions. [2023-11-26 12:06:42,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-26 12:06:42,888 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:06:42,888 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:06:42,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 12:06:43,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:06:43,095 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:06:43,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:06:43,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1436506100, now seen corresponding path program 1 times [2023-11-26 12:06:43,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:06:43,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392504277] [2023-11-26 12:06:43,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:06:43,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:06:43,109 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:06:43,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1456781622] [2023-11-26 12:06:43,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:06:43,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:06:43,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:06:43,111 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:06:43,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 12:06:43,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:06:43,198 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-26 12:06:43,201 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:06:43,217 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-26 12:06:43,257 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 12:06:43,257 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:06:43,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-11-26 12:06:43,295 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-11-26 12:06:43,305 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 12:06:43,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:06:43,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392504277] [2023-11-26 12:06:43,305 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:06:43,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456781622] [2023-11-26 12:06:43,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456781622] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:06:43,306 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 12:06:43,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2023-11-26 12:06:43,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383966680] [2023-11-26 12:06:43,306 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 12:06:43,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 12:06:43,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:06:43,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 12:06:43,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-26 12:06:43,308 INFO L87 Difference]: Start difference. First operand 44 states and 57 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:06:43,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:06:43,400 INFO L93 Difference]: Finished difference Result 75 states and 99 transitions. [2023-11-26 12:06:43,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 12:06:43,403 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-26 12:06:43,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:06:43,404 INFO L225 Difference]: With dead ends: 75 [2023-11-26 12:06:43,404 INFO L226 Difference]: Without dead ends: 54 [2023-11-26 12:06:43,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-11-26 12:06:43,405 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 6 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 12:06:43,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 48 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 12:06:43,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-11-26 12:06:43,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2023-11-26 12:06:43,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 45 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:06:43,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 59 transitions. [2023-11-26 12:06:43,417 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 59 transitions. Word has length 19 [2023-11-26 12:06:43,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:06:43,417 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 59 transitions. [2023-11-26 12:06:43,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:06:43,418 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 59 transitions. [2023-11-26 12:06:43,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-26 12:06:43,418 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:06:43,419 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:06:43,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 12:06:43,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:06:43,626 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:06:43,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:06:43,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1950697993, now seen corresponding path program 2 times [2023-11-26 12:06:43,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:06:43,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496921308] [2023-11-26 12:06:43,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:06:43,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:06:43,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:06:43,742 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 12:06:43,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:06:43,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496921308] [2023-11-26 12:06:43,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496921308] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:06:43,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139238839] [2023-11-26 12:06:43,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 12:06:43,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:06:43,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:06:43,744 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:06:43,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 12:06:43,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 12:06:43,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 12:06:43,839 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 12:06:43,841 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:06:43,894 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 12:06:43,894 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:06:43,951 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 12:06:43,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139238839] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:06:43,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:06:43,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-11-26 12:06:43,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603104569] [2023-11-26 12:06:43,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:06:43,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-26 12:06:43,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:06:43,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-26 12:06:43,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-11-26 12:06:43,954 INFO L87 Difference]: Start difference. First operand 46 states and 59 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:06:44,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:06:44,124 INFO L93 Difference]: Finished difference Result 82 states and 105 transitions. [2023-11-26 12:06:44,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 12:06:44,125 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-26 12:06:44,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:06:44,127 INFO L225 Difference]: With dead ends: 82 [2023-11-26 12:06:44,127 INFO L226 Difference]: Without dead ends: 72 [2023-11-26 12:06:44,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2023-11-26 12:06:44,129 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 67 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 12:06:44,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 19 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 12:06:44,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-11-26 12:06:44,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2023-11-26 12:06:44,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.3265306122448979) internal successors, (65), 49 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:06:44,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 65 transitions. [2023-11-26 12:06:44,152 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 65 transitions. Word has length 20 [2023-11-26 12:06:44,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:06:44,152 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 65 transitions. [2023-11-26 12:06:44,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:06:44,153 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 65 transitions. [2023-11-26 12:06:44,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-26 12:06:44,154 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:06:44,154 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:06:44,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 12:06:44,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-26 12:06:44,361 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:06:44,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:06:44,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1769185541, now seen corresponding path program 3 times [2023-11-26 12:06:44,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:06:44,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428259600] [2023-11-26 12:06:44,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:06:44,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:06:44,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:06:44,486 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 12:06:44,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:06:44,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428259600] [2023-11-26 12:06:44,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428259600] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:06:44,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361050665] [2023-11-26 12:06:44,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 12:06:44,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:06:44,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:06:44,503 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:06:44,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 12:06:44,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-26 12:06:44,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 12:06:44,603 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 12:06:44,605 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:06:44,671 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 12:06:44,671 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:06:44,717 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 12:06:44,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361050665] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:06:44,718 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:06:44,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-11-26 12:06:44,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975342531] [2023-11-26 12:06:44,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:06:44,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-26 12:06:44,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:06:44,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-26 12:06:44,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-11-26 12:06:44,724 INFO L87 Difference]: Start difference. First operand 50 states and 65 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:06:44,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:06:44,843 INFO L93 Difference]: Finished difference Result 74 states and 93 transitions. [2023-11-26 12:06:44,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 12:06:44,844 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-11-26 12:06:44,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:06:44,851 INFO L225 Difference]: With dead ends: 74 [2023-11-26 12:06:44,852 INFO L226 Difference]: Without dead ends: 38 [2023-11-26 12:06:44,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2023-11-26 12:06:44,854 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 27 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 12:06:44,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 18 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 12:06:44,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-11-26 12:06:44,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2023-11-26 12:06:44,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.25) internal successors, (40), 32 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:06:44,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2023-11-26 12:06:44,867 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 22 [2023-11-26 12:06:44,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:06:44,868 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2023-11-26 12:06:44,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:06:44,868 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2023-11-26 12:06:44,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-26 12:06:44,871 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:06:44,871 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:06:44,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 12:06:45,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-26 12:06:45,078 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:06:45,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:06:45,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1237862050, now seen corresponding path program 4 times [2023-11-26 12:06:45,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:06:45,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080303732] [2023-11-26 12:06:45,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:06:45,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:06:45,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:06:45,689 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-26 12:06:45,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:06:45,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080303732] [2023-11-26 12:06:45,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080303732] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:06:45,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729629600] [2023-11-26 12:06:45,690 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-26 12:06:45,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:06:45,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:06:45,693 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:06:45,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 12:06:45,814 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-26 12:06:45,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 12:06:45,816 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-26 12:06:45,820 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:06:45,832 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-26 12:06:46,093 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-26 12:06:46,211 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-26 12:06:46,275 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:06:46,275 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:06:46,872 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:06:46,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729629600] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:06:46,872 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:06:46,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 33 [2023-11-26 12:06:46,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103324548] [2023-11-26 12:06:46,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:06:46,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-26 12:06:46,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:06:46,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-26 12:06:46,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2023-11-26 12:06:46,878 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 33 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:06:47,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:06:47,943 INFO L93 Difference]: Finished difference Result 89 states and 109 transitions. [2023-11-26 12:06:47,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-26 12:06:47,944 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 33 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-11-26 12:06:47,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:06:47,944 INFO L225 Difference]: With dead ends: 89 [2023-11-26 12:06:47,945 INFO L226 Difference]: Without dead ends: 80 [2023-11-26 12:06:47,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=335, Invalid=2017, Unknown=0, NotChecked=0, Total=2352 [2023-11-26 12:06:47,947 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-26 12:06:47,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 125 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-26 12:06:47,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-11-26 12:06:47,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 61. [2023-11-26 12:06:47,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.2833333333333334) internal successors, (77), 60 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:06:47,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 77 transitions. [2023-11-26 12:06:47,967 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 77 transitions. Word has length 26 [2023-11-26 12:06:47,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:06:47,967 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 77 transitions. [2023-11-26 12:06:47,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 33 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:06:47,968 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 77 transitions. [2023-11-26 12:06:47,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-26 12:06:47,968 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:06:47,969 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:06:47,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 12:06:48,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-26 12:06:48,180 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:06:48,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:06:48,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1180603748, now seen corresponding path program 1 times [2023-11-26 12:06:48,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:06:48,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46699755] [2023-11-26 12:06:48,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:06:48,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:06:48,195 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:06:48,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [325663631] [2023-11-26 12:06:48,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:06:48,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:06:48,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:06:48,197 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:06:48,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 12:06:48,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:06:48,288 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-26 12:06:48,290 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:06:48,363 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-26 12:06:48,461 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 12:06:48,461 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:06:48,545 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2023-11-26 12:06:48,551 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-26 12:06:48,552 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2023-11-26 12:06:48,584 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 12:06:48,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:06:48,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46699755] [2023-11-26 12:06:48,584 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:06:48,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325663631] [2023-11-26 12:06:48,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325663631] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:06:48,585 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 12:06:48,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2023-11-26 12:06:48,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961525186] [2023-11-26 12:06:48,585 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 12:06:48,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-26 12:06:48,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:06:48,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-26 12:06:48,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2023-11-26 12:06:48,587 INFO L87 Difference]: Start difference. First operand 61 states and 77 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:06:48,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:06:48,852 INFO L93 Difference]: Finished difference Result 108 states and 135 transitions. [2023-11-26 12:06:48,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-26 12:06:48,853 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-11-26 12:06:48,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:06:48,854 INFO L225 Difference]: With dead ends: 108 [2023-11-26 12:06:48,854 INFO L226 Difference]: Without dead ends: 101 [2023-11-26 12:06:48,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2023-11-26 12:06:48,855 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 92 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 12:06:48,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 86 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 12:06:48,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-11-26 12:06:48,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2023-11-26 12:06:48,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.2575757575757576) internal successors, (83), 66 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:06:48,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 83 transitions. [2023-11-26 12:06:48,878 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 83 transitions. Word has length 26 [2023-11-26 12:06:48,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:06:48,879 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 83 transitions. [2023-11-26 12:06:48,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:06:48,879 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 83 transitions. [2023-11-26 12:06:48,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-26 12:06:48,880 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:06:48,880 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:06:48,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 12:06:49,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:06:49,093 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:06:49,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:06:49,093 INFO L85 PathProgramCache]: Analyzing trace with hash 2103246298, now seen corresponding path program 1 times [2023-11-26 12:06:49,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:06:49,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989093945] [2023-11-26 12:06:49,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:06:49,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:06:49,108 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:06:49,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1170472393] [2023-11-26 12:06:49,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:06:49,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:06:49,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:06:49,110 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:06:49,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 12:06:49,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:06:49,205 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-26 12:06:49,207 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:06:49,230 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-26 12:06:49,278 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 12:06:49,278 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 20 [2023-11-26 12:06:49,313 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-26 12:06:49,313 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:06:49,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-11-26 12:06:49,374 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-26 12:06:49,397 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-26 12:06:49,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:06:49,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989093945] [2023-11-26 12:06:49,398 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:06:49,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170472393] [2023-11-26 12:06:49,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170472393] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:06:49,398 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 12:06:49,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2023-11-26 12:06:49,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652847892] [2023-11-26 12:06:49,399 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 12:06:49,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-26 12:06:49,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:06:49,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-26 12:06:49,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-11-26 12:06:49,400 INFO L87 Difference]: Start difference. First operand 67 states and 83 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:06:49,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:06:49,551 INFO L93 Difference]: Finished difference Result 109 states and 139 transitions. [2023-11-26 12:06:49,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 12:06:49,552 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-11-26 12:06:49,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:06:49,554 INFO L225 Difference]: With dead ends: 109 [2023-11-26 12:06:49,554 INFO L226 Difference]: Without dead ends: 78 [2023-11-26 12:06:49,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-11-26 12:06:49,555 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 12:06:49,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 51 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 12:06:49,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-11-26 12:06:49,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 69. [2023-11-26 12:06:49,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.25) internal successors, (85), 68 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:06:49,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 85 transitions. [2023-11-26 12:06:49,581 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 85 transitions. Word has length 26 [2023-11-26 12:06:49,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:06:49,581 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 85 transitions. [2023-11-26 12:06:49,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:06:49,581 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 85 transitions. [2023-11-26 12:06:49,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-26 12:06:49,582 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:06:49,583 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:06:49,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 12:06:49,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-26 12:06:49,789 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:06:49,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:06:49,790 INFO L85 PathProgramCache]: Analyzing trace with hash -939265221, now seen corresponding path program 5 times [2023-11-26 12:06:49,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:06:49,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008114847] [2023-11-26 12:06:49,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:06:49,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:06:49,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:06:49,932 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-26 12:06:49,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:06:49,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008114847] [2023-11-26 12:06:49,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008114847] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:06:49,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458369128] [2023-11-26 12:06:49,933 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-26 12:06:49,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:06:49,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:06:49,934 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:06:49,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 12:06:50,055 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-26 12:06:50,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 12:06:50,057 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 12:06:50,059 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:06:50,157 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-26 12:06:50,157 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:06:50,238 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-26 12:06:50,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458369128] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:06:50,239 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:06:50,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-11-26 12:06:50,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526557878] [2023-11-26 12:06:50,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:06:50,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-26 12:06:50,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:06:50,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-26 12:06:50,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-26 12:06:50,241 INFO L87 Difference]: Start difference. First operand 69 states and 85 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:06:50,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:06:50,534 INFO L93 Difference]: Finished difference Result 112 states and 138 transitions. [2023-11-26 12:06:50,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-26 12:06:50,535 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-11-26 12:06:50,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:06:50,536 INFO L225 Difference]: With dead ends: 112 [2023-11-26 12:06:50,536 INFO L226 Difference]: Without dead ends: 97 [2023-11-26 12:06:50,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 43 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2023-11-26 12:06:50,537 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 57 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 12:06:50,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 23 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 12:06:50,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-11-26 12:06:50,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 68. [2023-11-26 12:06:50,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.2537313432835822) internal successors, (84), 67 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:06:50,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 84 transitions. [2023-11-26 12:06:50,556 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 84 transitions. Word has length 27 [2023-11-26 12:06:50,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:06:50,557 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 84 transitions. [2023-11-26 12:06:50,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:06:50,557 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 84 transitions. [2023-11-26 12:06:50,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-26 12:06:50,558 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:06:50,558 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:06:50,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 12:06:50,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:06:50,764 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:06:50,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:06:50,765 INFO L85 PathProgramCache]: Analyzing trace with hash 979910811, now seen corresponding path program 6 times [2023-11-26 12:06:50,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:06:50,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219676325] [2023-11-26 12:06:50,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:06:50,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:06:50,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:06:50,942 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-26 12:06:50,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:06:50,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219676325] [2023-11-26 12:06:50,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219676325] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:06:50,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063295240] [2023-11-26 12:06:50,942 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-26 12:06:50,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:06:50,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:06:50,944 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:06:50,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 12:06:51,061 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-26 12:06:51,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 12:06:51,063 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 12:06:51,065 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:06:51,165 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-26 12:06:51,166 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:06:51,240 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-26 12:06:51,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063295240] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:06:51,240 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:06:51,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-11-26 12:06:51,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858712438] [2023-11-26 12:06:51,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:06:51,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-26 12:06:51,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:06:51,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-26 12:06:51,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-26 12:06:51,243 INFO L87 Difference]: Start difference. First operand 68 states and 84 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:06:51,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:06:51,424 INFO L93 Difference]: Finished difference Result 101 states and 122 transitions. [2023-11-26 12:06:51,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 12:06:51,424 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-11-26 12:06:51,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:06:51,425 INFO L225 Difference]: With dead ends: 101 [2023-11-26 12:06:51,425 INFO L226 Difference]: Without dead ends: 48 [2023-11-26 12:06:51,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2023-11-26 12:06:51,427 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 55 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 12:06:51,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 22 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 12:06:51,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-11-26 12:06:51,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 43. [2023-11-26 12:06:51,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 42 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:06:51,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2023-11-26 12:06:51,439 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 29 [2023-11-26 12:06:51,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:06:51,439 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2023-11-26 12:06:51,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:06:51,439 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2023-11-26 12:06:51,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-26 12:06:51,440 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:06:51,440 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:06:51,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-26 12:06:51,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:06:51,647 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:06:51,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:06:51,647 INFO L85 PathProgramCache]: Analyzing trace with hash -2065802316, now seen corresponding path program 7 times [2023-11-26 12:06:51,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:06:51,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298661093] [2023-11-26 12:06:51,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:06:51,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:06:51,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:06:52,413 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-26 12:06:52,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:06:52,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298661093] [2023-11-26 12:06:52,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298661093] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:06:52,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663971880] [2023-11-26 12:06:52,413 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-26 12:06:52,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:06:52,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:06:52,420 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:06:52,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-26 12:06:52,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:06:52,520 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-26 12:06:52,530 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:06:52,536 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-26 12:06:52,650 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-26 12:06:52,751 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-26 12:06:52,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-26 12:06:52,955 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-26 12:06:52,955 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:06:54,033 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-26 12:06:54,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663971880] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:06:54,033 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:06:54,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 33 [2023-11-26 12:06:54,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906525778] [2023-11-26 12:06:54,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:06:54,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-26 12:06:54,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:06:54,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-26 12:06:54,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=951, Unknown=1, NotChecked=0, Total=1056 [2023-11-26 12:06:54,036 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 33 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:06:55,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:06:55,879 INFO L93 Difference]: Finished difference Result 142 states and 169 transitions. [2023-11-26 12:06:55,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-26 12:06:55,880 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 33 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2023-11-26 12:06:55,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:06:55,881 INFO L225 Difference]: With dead ends: 142 [2023-11-26 12:06:55,881 INFO L226 Difference]: Without dead ends: 133 [2023-11-26 12:06:55,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=381, Invalid=3158, Unknown=1, NotChecked=0, Total=3540 [2023-11-26 12:06:55,884 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 107 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 1083 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 1155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-26 12:06:55,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 196 Invalid, 1155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1083 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-26 12:06:55,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2023-11-26 12:06:55,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 92. [2023-11-26 12:06:55,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.2747252747252746) internal successors, (116), 91 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:06:55,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 116 transitions. [2023-11-26 12:06:55,914 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 116 transitions. Word has length 33 [2023-11-26 12:06:55,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:06:55,915 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 116 transitions. [2023-11-26 12:06:55,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 33 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:06:55,915 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 116 transitions. [2023-11-26 12:06:55,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-26 12:06:55,916 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:06:55,916 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:06:55,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-26 12:06:56,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:06:56,123 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:06:56,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:06:56,123 INFO L85 PathProgramCache]: Analyzing trace with hash -2008544014, now seen corresponding path program 2 times [2023-11-26 12:06:56,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:06:56,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504404119] [2023-11-26 12:06:56,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:06:56,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:06:56,138 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:06:56,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [752224517] [2023-11-26 12:06:56,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 12:06:56,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:06:56,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:06:56,139 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:06:56,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-26 12:06:56,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 12:06:56,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 12:06:56,262 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-26 12:06:56,264 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:06:56,389 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-26 12:06:56,509 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 12:06:56,509 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:06:56,610 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2023-11-26 12:06:56,615 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-26 12:06:56,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2023-11-26 12:06:56,658 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-26 12:06:56,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:06:56,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504404119] [2023-11-26 12:06:56,660 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:06:56,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752224517] [2023-11-26 12:06:56,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752224517] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:06:56,660 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 12:06:56,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2023-11-26 12:06:56,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257005017] [2023-11-26 12:06:56,660 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 12:06:56,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-26 12:06:56,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:06:56,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-26 12:06:56,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2023-11-26 12:06:56,662 INFO L87 Difference]: Start difference. First operand 92 states and 116 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:06:57,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:06:57,062 INFO L93 Difference]: Finished difference Result 139 states and 174 transitions. [2023-11-26 12:06:57,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-26 12:06:57,063 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2023-11-26 12:06:57,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:06:57,066 INFO L225 Difference]: With dead ends: 139 [2023-11-26 12:06:57,066 INFO L226 Difference]: Without dead ends: 132 [2023-11-26 12:06:57,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2023-11-26 12:06:57,069 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 84 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 15 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 12:06:57,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 110 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 405 Invalid, 1 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 12:06:57,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-11-26 12:06:57,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 98. [2023-11-26 12:06:57,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.2577319587628866) internal successors, (122), 97 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:06:57,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 122 transitions. [2023-11-26 12:06:57,108 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 122 transitions. Word has length 33 [2023-11-26 12:06:57,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:06:57,108 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 122 transitions. [2023-11-26 12:06:57,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:06:57,109 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 122 transitions. [2023-11-26 12:06:57,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-26 12:06:57,110 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:06:57,110 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:06:57,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-26 12:06:57,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:06:57,317 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:06:57,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:06:57,317 INFO L85 PathProgramCache]: Analyzing trace with hash 698075380, now seen corresponding path program 2 times [2023-11-26 12:06:57,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:06:57,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572057127] [2023-11-26 12:06:57,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:06:57,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:06:57,354 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:06:57,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1302459858] [2023-11-26 12:06:57,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 12:06:57,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:06:57,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:06:57,360 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:06:57,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-26 12:06:57,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 12:06:57,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 12:06:57,470 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-26 12:06:57,472 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:06:57,524 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-26 12:06:57,577 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 12:06:57,577 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 20 [2023-11-26 12:06:57,626 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 12:06:57,627 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 20 [2023-11-26 12:06:57,660 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-26 12:06:57,661 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:06:57,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-11-26 12:06:57,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-26 12:06:57,781 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-26 12:06:57,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:06:57,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572057127] [2023-11-26 12:06:57,781 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:06:57,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302459858] [2023-11-26 12:06:57,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302459858] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:06:57,782 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 12:06:57,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2023-11-26 12:06:57,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655279568] [2023-11-26 12:06:57,782 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 12:06:57,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-26 12:06:57,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:06:57,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-26 12:06:57,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2023-11-26 12:06:57,784 INFO L87 Difference]: Start difference. First operand 98 states and 122 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:06:58,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:06:58,025 INFO L93 Difference]: Finished difference Result 158 states and 204 transitions. [2023-11-26 12:06:58,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-26 12:06:58,025 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2023-11-26 12:06:58,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:06:58,027 INFO L225 Difference]: With dead ends: 158 [2023-11-26 12:06:58,027 INFO L226 Difference]: Without dead ends: 109 [2023-11-26 12:06:58,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2023-11-26 12:06:58,028 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 12:06:58,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 66 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 12:06:58,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-11-26 12:06:58,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 100. [2023-11-26 12:06:58,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.2525252525252526) internal successors, (124), 99 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:06:58,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 124 transitions. [2023-11-26 12:06:58,059 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 124 transitions. Word has length 33 [2023-11-26 12:06:58,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:06:58,060 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 124 transitions. [2023-11-26 12:06:58,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:06:58,060 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 124 transitions. [2023-11-26 12:06:58,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-26 12:06:58,061 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:06:58,061 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:06:58,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-26 12:06:58,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-26 12:06:58,268 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:06:58,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:06:58,268 INFO L85 PathProgramCache]: Analyzing trace with hash -437010633, now seen corresponding path program 8 times [2023-11-26 12:06:58,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:06:58,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060945676] [2023-11-26 12:06:58,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:06:58,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:06:58,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:06:58,453 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-26 12:06:58,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:06:58,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060945676] [2023-11-26 12:06:58,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060945676] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:06:58,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640318167] [2023-11-26 12:06:58,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 12:06:58,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:06:58,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:06:58,455 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:06:58,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-26 12:06:58,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 12:06:58,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 12:06:58,577 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-26 12:06:58,578 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:06:58,682 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-26 12:06:58,683 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:06:58,772 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-26 12:06:58,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640318167] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:06:58,773 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:06:58,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-11-26 12:06:58,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883928473] [2023-11-26 12:06:58,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:06:58,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-26 12:06:58,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:06:58,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-26 12:06:58,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-11-26 12:06:58,775 INFO L87 Difference]: Start difference. First operand 100 states and 124 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:06:59,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:06:59,157 INFO L93 Difference]: Finished difference Result 149 states and 183 transitions. [2023-11-26 12:06:59,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-26 12:06:59,158 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-11-26 12:06:59,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:06:59,159 INFO L225 Difference]: With dead ends: 149 [2023-11-26 12:06:59,159 INFO L226 Difference]: Without dead ends: 131 [2023-11-26 12:06:59,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 54 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2023-11-26 12:06:59,161 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 102 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 12:06:59,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 22 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 12:06:59,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-11-26 12:06:59,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 91. [2023-11-26 12:06:59,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.2555555555555555) internal successors, (113), 90 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:06:59,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 113 transitions. [2023-11-26 12:06:59,187 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 113 transitions. Word has length 34 [2023-11-26 12:06:59,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:06:59,187 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 113 transitions. [2023-11-26 12:06:59,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:06:59,188 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 113 transitions. [2023-11-26 12:06:59,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-26 12:06:59,188 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:06:59,188 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:06:59,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-26 12:06:59,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-26 12:06:59,389 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:06:59,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:06:59,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1808627333, now seen corresponding path program 9 times [2023-11-26 12:06:59,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:06:59,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50315018] [2023-11-26 12:06:59,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:06:59,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:06:59,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:06:59,550 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-26 12:06:59,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:06:59,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50315018] [2023-11-26 12:06:59,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50315018] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:06:59,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146571678] [2023-11-26 12:06:59,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 12:06:59,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:06:59,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:06:59,553 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:06:59,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-26 12:06:59,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-26 12:06:59,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 12:06:59,715 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-26 12:06:59,717 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:06:59,853 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 29 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-26 12:06:59,853 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:06:59,976 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-26 12:06:59,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146571678] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:06:59,977 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:06:59,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 21 [2023-11-26 12:06:59,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006795881] [2023-11-26 12:06:59,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:06:59,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-26 12:06:59,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:06:59,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-26 12:06:59,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=305, Unknown=0, NotChecked=0, Total=420 [2023-11-26 12:06:59,981 INFO L87 Difference]: Start difference. First operand 91 states and 113 transitions. Second operand has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:07:00,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:07:00,259 INFO L93 Difference]: Finished difference Result 133 states and 161 transitions. [2023-11-26 12:07:00,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-26 12:07:00,260 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2023-11-26 12:07:00,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:07:00,261 INFO L225 Difference]: With dead ends: 133 [2023-11-26 12:07:00,261 INFO L226 Difference]: Without dead ends: 58 [2023-11-26 12:07:00,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 54 SyntacticMatches, 8 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=214, Invalid=542, Unknown=0, NotChecked=0, Total=756 [2023-11-26 12:07:00,262 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 105 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 12:07:00,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 15 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 12:07:00,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-11-26 12:07:00,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2023-11-26 12:07:00,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.1923076923076923) internal successors, (62), 52 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:07:00,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2023-11-26 12:07:00,278 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 36 [2023-11-26 12:07:00,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:07:00,279 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2023-11-26 12:07:00,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:07:00,279 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2023-11-26 12:07:00,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-26 12:07:00,279 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:07:00,280 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:07:00,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-26 12:07:00,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-26 12:07:00,494 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:07:00,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:07:00,494 INFO L85 PathProgramCache]: Analyzing trace with hash 524550494, now seen corresponding path program 10 times [2023-11-26 12:07:00,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:07:00,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501196442] [2023-11-26 12:07:00,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:07:00,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:07:00,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:07:01,644 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-26 12:07:01,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:07:01,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501196442] [2023-11-26 12:07:01,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501196442] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:07:01,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169920362] [2023-11-26 12:07:01,644 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-26 12:07:01,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:07:01,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:07:01,646 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:07:01,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-26 12:07:01,817 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-26 12:07:01,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 12:07:01,820 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 55 conjunts are in the unsatisfiable core [2023-11-26 12:07:01,824 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:07:01,829 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-26 12:07:01,973 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-26 12:07:02,101 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-26 12:07:02,252 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-26 12:07:02,441 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-26 12:07:02,526 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-26 12:07:02,526 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:07:03,962 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-26 12:07:03,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169920362] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:07:03,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:07:03,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17, 17] total 42 [2023-11-26 12:07:03,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393135642] [2023-11-26 12:07:03,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:07:03,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-26 12:07:03,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:07:03,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-26 12:07:03,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1585, Unknown=1, NotChecked=0, Total=1722 [2023-11-26 12:07:03,966 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 42 states, 42 states have (on average 1.6428571428571428) internal successors, (69), 42 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:07:07,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:07:07,331 INFO L93 Difference]: Finished difference Result 184 states and 217 transitions. [2023-11-26 12:07:07,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-11-26 12:07:07,332 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.6428571428571428) internal successors, (69), 42 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-11-26 12:07:07,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:07:07,333 INFO L225 Difference]: With dead ends: 184 [2023-11-26 12:07:07,333 INFO L226 Difference]: Without dead ends: 175 [2023-11-26 12:07:07,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1533 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=565, Invalid=6076, Unknown=1, NotChecked=0, Total=6642 [2023-11-26 12:07:07,337 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 136 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 1941 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 2059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 1941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-26 12:07:07,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 302 Invalid, 2059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 1941 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-26 12:07:07,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2023-11-26 12:07:07,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 120. [2023-11-26 12:07:07,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.2605042016806722) internal successors, (150), 119 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:07:07,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 150 transitions. [2023-11-26 12:07:07,379 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 150 transitions. Word has length 40 [2023-11-26 12:07:07,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:07:07,379 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 150 transitions. [2023-11-26 12:07:07,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.6428571428571428) internal successors, (69), 42 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:07:07,380 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 150 transitions. [2023-11-26 12:07:07,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-26 12:07:07,381 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:07:07,381 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:07:07,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-26 12:07:07,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-26 12:07:07,588 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:07:07,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:07:07,588 INFO L85 PathProgramCache]: Analyzing trace with hash 581808796, now seen corresponding path program 3 times [2023-11-26 12:07:07,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:07:07,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489739922] [2023-11-26 12:07:07,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:07:07,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:07:07,608 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:07:07,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [424790453] [2023-11-26 12:07:07,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 12:07:07,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:07:07,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:07:07,610 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:07:07,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-26 12:07:07,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-26 12:07:07,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 12:07:07,789 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-26 12:07:07,790 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:07:07,813 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-11-26 12:07:07,899 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 12:07:07,900 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 17 [2023-11-26 12:07:07,955 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-11-26 12:07:07,956 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:07:08,110 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-11-26 12:07:08,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:07:08,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489739922] [2023-11-26 12:07:08,110 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:07:08,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424790453] [2023-11-26 12:07:08,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424790453] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:07:08,110 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 12:07:08,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2023-11-26 12:07:08,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166992070] [2023-11-26 12:07:08,111 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 12:07:08,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-26 12:07:08,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:07:08,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-26 12:07:08,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2023-11-26 12:07:08,114 INFO L87 Difference]: Start difference. First operand 120 states and 150 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:07:08,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:07:08,490 INFO L93 Difference]: Finished difference Result 196 states and 250 transitions. [2023-11-26 12:07:08,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-26 12:07:08,491 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-11-26 12:07:08,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:07:08,492 INFO L225 Difference]: With dead ends: 196 [2023-11-26 12:07:08,492 INFO L226 Difference]: Without dead ends: 192 [2023-11-26 12:07:08,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2023-11-26 12:07:08,494 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 25 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 12:07:08,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 39 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 12:07:08,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2023-11-26 12:07:08,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 173. [2023-11-26 12:07:08,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.302325581395349) internal successors, (224), 172 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:07:08,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 224 transitions. [2023-11-26 12:07:08,562 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 224 transitions. Word has length 40 [2023-11-26 12:07:08,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:07:08,562 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 224 transitions. [2023-11-26 12:07:08,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:07:08,563 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 224 transitions. [2023-11-26 12:07:08,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-26 12:07:08,563 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:07:08,564 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:07:08,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-26 12:07:08,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:07:08,770 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:07:08,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:07:08,770 INFO L85 PathProgramCache]: Analyzing trace with hash -235839654, now seen corresponding path program 3 times [2023-11-26 12:07:08,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:07:08,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720794224] [2023-11-26 12:07:08,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:07:08,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:07:08,789 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:07:08,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2124097880] [2023-11-26 12:07:08,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 12:07:08,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:07:08,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:07:08,791 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:07:08,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_710833fa-42e4-4094-a44e-12356f1e6630/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-26 12:07:09,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-26 12:07:09,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 12:07:09,027 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-26 12:07:09,030 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:07:09,057 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-26 12:07:09,142 INFO L349 Elim1Store]: treesize reduction 38, result has 24.0 percent of original size [2023-11-26 12:07:09,143 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 29 [2023-11-26 12:07:09,200 INFO L349 Elim1Store]: treesize reduction 38, result has 24.0 percent of original size [2023-11-26 12:07:09,200 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 29 [2023-11-26 12:07:09,241 INFO L349 Elim1Store]: treesize reduction 21, result has 58.0 percent of original size [2023-11-26 12:07:09,241 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 45 [2023-11-26 12:07:09,383 INFO L349 Elim1Store]: treesize reduction 31, result has 38.0 percent of original size [2023-11-26 12:07:09,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 39 [2023-11-26 12:07:09,503 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-26 12:07:09,503 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:07:13,795 WARN L854 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_258| Int)) (or (< (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_258|) (forall ((|v_ULTIMATE.start_main_~i~0#1_257| Int)) (or (= (select (let ((.cse0 (let ((.cse2 (select |c_#memory_int#3| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse3 (+ (* |v_ULTIMATE.start_main_~i~0#1_258| 4) |c_ULTIMATE.start_main_~a~0#1.offset|))) (store .cse2 .cse3 (+ 5 (select .cse2 .cse3))))) (.cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_257| 4)))) (store .cse0 .cse1 (+ (select .cse0 .cse1) 5))) (+ (* c_~N~0 4) (- 4) |c_ULTIMATE.start_main_~a~0#1.offset|)) 1) (< c_~N~0 (+ 2 |v_ULTIMATE.start_main_~i~0#1_257|)))))) is different from false