./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_variablewrapping_wrapper-ap_file-12.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/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_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_variablewrapping_wrapper-ap_file-12.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/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_9aee72d9-08df-4e30-ab9d-dc3170b9245a/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 6b3d37dbb1f844bbdab9795055d991e82d88af691e0e65987480a92814525937 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:51:56,508 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:51:56,584 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 11:51:56,591 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:51:56,592 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:51:56,621 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:51:56,622 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:51:56,623 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:51:56,624 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:51:56,624 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:51:56,625 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:51:56,626 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:51:56,627 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:51:56,628 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:51:56,628 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:51:56,629 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:51:56,630 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:51:56,630 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:51:56,631 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:51:56,631 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:51:56,632 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:51:56,633 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:51:56,633 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:51:56,634 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:51:56,634 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:51:56,635 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:51:56,635 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:51:56,636 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:51:56,636 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:51:56,637 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:51:56,637 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:51:56,638 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:51:56,638 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:51:56,639 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:51:56,639 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:51:56,640 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:51:56,640 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:51:56,640 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:51:56,641 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:51:56,641 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:51:56,642 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:51:56,643 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:51:56,643 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_9aee72d9-08df-4e30-ab9d-dc3170b9245a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6b3d37dbb1f844bbdab9795055d991e82d88af691e0e65987480a92814525937 [2023-11-26 11:51:56,952 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:51:56,990 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:51:56,993 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:51:56,995 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:51:56,995 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:51:56,998 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/hardness-nfm22/hardness_variablewrapping_wrapper-ap_file-12.i [2023-11-26 11:52:00,235 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:52:00,490 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:52:00,492 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/sv-benchmarks/c/hardness-nfm22/hardness_variablewrapping_wrapper-ap_file-12.i [2023-11-26 11:52:00,509 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/data/2429a994a/8fa373302a6e4078acd968f8151eac3f/FLAG11c19f4f2 [2023-11-26 11:52:00,526 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/data/2429a994a/8fa373302a6e4078acd968f8151eac3f [2023-11-26 11:52:00,535 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:52:00,538 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:52:00,543 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:52:00,543 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:52:00,549 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:52:00,553 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:52:00" (1/1) ... [2023-11-26 11:52:00,555 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@489512cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:00, skipping insertion in model container [2023-11-26 11:52:00,555 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:52:00" (1/1) ... [2023-11-26 11:52:00,605 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:52:00,787 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_9aee72d9-08df-4e30-ab9d-dc3170b9245a/sv-benchmarks/c/hardness-nfm22/hardness_variablewrapping_wrapper-ap_file-12.i[917,930] [2023-11-26 11:52:00,895 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:52:00,909 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:52:00,923 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_9aee72d9-08df-4e30-ab9d-dc3170b9245a/sv-benchmarks/c/hardness-nfm22/hardness_variablewrapping_wrapper-ap_file-12.i[917,930] [2023-11-26 11:52:00,977 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:52:01,019 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:52:01,019 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:01 WrapperNode [2023-11-26 11:52:01,020 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:52:01,021 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:52:01,022 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:52:01,022 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:52:01,030 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:01" (1/1) ... [2023-11-26 11:52:01,062 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:01" (1/1) ... [2023-11-26 11:52:01,123 INFO L138 Inliner]: procedures = 26, calls = 153, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 401 [2023-11-26 11:52:01,128 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:52:01,129 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:52:01,129 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:52:01,130 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:52:01,140 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:01" (1/1) ... [2023-11-26 11:52:01,140 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:01" (1/1) ... [2023-11-26 11:52:01,147 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:01" (1/1) ... [2023-11-26 11:52:01,185 INFO L175 MemorySlicer]: Split 123 memory accesses to 4 slices as follows [2, 38, 12, 71]. 58 percent of accesses are in the largest equivalence class. The 13 initializations are split as follows [2, 5, 2, 4]. The 14 writes are split as follows [0, 8, 2, 4]. [2023-11-26 11:52:01,187 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:01" (1/1) ... [2023-11-26 11:52:01,188 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:01" (1/1) ... [2023-11-26 11:52:01,221 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:01" (1/1) ... [2023-11-26 11:52:01,241 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:01" (1/1) ... [2023-11-26 11:52:01,244 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:01" (1/1) ... [2023-11-26 11:52:01,248 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:01" (1/1) ... [2023-11-26 11:52:01,269 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:52:01,270 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:52:01,271 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:52:01,271 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:52:01,272 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:01" (1/1) ... [2023-11-26 11:52:01,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:52:01,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:01,330 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:52:01,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:52:01,383 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:52:01,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 11:52:01,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 11:52:01,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 11:52:01,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-26 11:52:01,385 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 11:52:01,385 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 11:52:01,387 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 11:52:01,387 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-26 11:52:01,388 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-26 11:52:01,388 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-26 11:52:01,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:52:01,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 11:52:01,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 11:52:01,389 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-26 11:52:01,389 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:52:01,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:52:01,571 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:52:01,573 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:52:02,167 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:52:02,238 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:52:02,239 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 11:52:02,239 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:52:02 BoogieIcfgContainer [2023-11-26 11:52:02,239 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:52:02,243 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:52:02,243 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:52:02,247 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:52:02,247 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:52:00" (1/3) ... [2023-11-26 11:52:02,248 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d2f1e79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:52:02, skipping insertion in model container [2023-11-26 11:52:02,249 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:52:01" (2/3) ... [2023-11-26 11:52:02,249 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d2f1e79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:52:02, skipping insertion in model container [2023-11-26 11:52:02,249 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:52:02" (3/3) ... [2023-11-26 11:52:02,251 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_variablewrapping_wrapper-ap_file-12.i [2023-11-26 11:52:02,302 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:52:02,302 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 11:52:02,418 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:52:02,424 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;@2812501f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:52:02,425 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 11:52:02,429 INFO L276 IsEmpty]: Start isEmpty. Operand has 91 states, 72 states have (on average 1.4305555555555556) internal successors, (103), 73 states have internal predecessors, (103), 16 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-26 11:52:02,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-11-26 11:52:02,443 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:52:02,444 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:52:02,445 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:52:02,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:02,451 INFO L85 PathProgramCache]: Analyzing trace with hash 352771580, now seen corresponding path program 1 times [2023-11-26 11:52:02,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:02,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252380573] [2023-11-26 11:52:02,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:02,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:02,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:02,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:02,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252380573] [2023-11-26 11:52:02,676 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-26 11:52:02,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071222624] [2023-11-26 11:52:02,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:02,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:02,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:02,681 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:52:02,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:52:02,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:02,931 INFO L262 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-26 11:52:02,943 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:02,988 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2023-11-26 11:52:02,988 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:52:02,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071222624] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:52:02,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:52:02,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:52:02,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912754083] [2023-11-26 11:52:02,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:52:03,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 11:52:03,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:03,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 11:52:03,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:52:03,037 INFO L87 Difference]: Start difference. First operand has 91 states, 72 states have (on average 1.4305555555555556) internal successors, (103), 73 states have internal predecessors, (103), 16 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2023-11-26 11:52:03,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:52:03,106 INFO L93 Difference]: Finished difference Result 173 states and 274 transitions. [2023-11-26 11:52:03,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 11:52:03,108 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) Word has length 112 [2023-11-26 11:52:03,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:52:03,116 INFO L225 Difference]: With dead ends: 173 [2023-11-26 11:52:03,117 INFO L226 Difference]: Without dead ends: 83 [2023-11-26 11:52:03,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:52:03,125 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:52:03,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 114 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:52:03,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-11-26 11:52:03,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2023-11-26 11:52:03,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 65 states have (on average 1.323076923076923) internal successors, (86), 65 states have internal predecessors, (86), 16 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-26 11:52:03,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 118 transitions. [2023-11-26 11:52:03,175 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 118 transitions. Word has length 112 [2023-11-26 11:52:03,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:52:03,175 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 118 transitions. [2023-11-26 11:52:03,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) [2023-11-26 11:52:03,176 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 118 transitions. [2023-11-26 11:52:03,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-11-26 11:52:03,180 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:52:03,180 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:52:03,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 11:52:03,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-26 11:52:03,384 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:52:03,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:03,385 INFO L85 PathProgramCache]: Analyzing trace with hash 698291676, now seen corresponding path program 1 times [2023-11-26 11:52:03,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:03,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267043014] [2023-11-26 11:52:03,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:03,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:03,525 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:52:03,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1552055415] [2023-11-26 11:52:03,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:03,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:03,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:03,537 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:52:03,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:52:03,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:03,751 INFO L262 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 11:52:03,767 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:03,838 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-11-26 11:52:03,839 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:52:03,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:03,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267043014] [2023-11-26 11:52:03,840 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:52:03,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552055415] [2023-11-26 11:52:03,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552055415] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:52:03,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:52:03,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:52:03,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634621168] [2023-11-26 11:52:03,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:52:03,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:52:03,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:03,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:52:03,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:52:03,848 INFO L87 Difference]: Start difference. First operand 83 states and 118 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-26 11:52:03,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:52:03,911 INFO L93 Difference]: Finished difference Result 165 states and 235 transitions. [2023-11-26 11:52:03,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:52:03,911 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 112 [2023-11-26 11:52:03,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:52:03,914 INFO L225 Difference]: With dead ends: 165 [2023-11-26 11:52:03,914 INFO L226 Difference]: Without dead ends: 83 [2023-11-26 11:52:03,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:52:03,917 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 45 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:52:03,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 286 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:52:03,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-11-26 11:52:03,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2023-11-26 11:52:03,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 65 states have (on average 1.3076923076923077) internal successors, (85), 65 states have internal predecessors, (85), 16 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-26 11:52:03,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 117 transitions. [2023-11-26 11:52:03,931 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 117 transitions. Word has length 112 [2023-11-26 11:52:03,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:52:03,933 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 117 transitions. [2023-11-26 11:52:03,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-26 11:52:03,934 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 117 transitions. [2023-11-26 11:52:03,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-11-26 11:52:03,936 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:52:03,937 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:52:03,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:52:04,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:04,144 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:52:04,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:04,144 INFO L85 PathProgramCache]: Analyzing trace with hash 555057374, now seen corresponding path program 1 times [2023-11-26 11:52:04,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:04,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547978669] [2023-11-26 11:52:04,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:04,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:04,199 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:52:04,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [947503667] [2023-11-26 11:52:04,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:04,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:04,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:04,201 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:52:04,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:52:04,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:04,408 INFO L262 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 11:52:04,450 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:04,482 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-11-26 11:52:04,482 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:52:04,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:04,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547978669] [2023-11-26 11:52:04,483 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:52:04,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947503667] [2023-11-26 11:52:04,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947503667] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:52:04,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:52:04,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 11:52:04,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566381061] [2023-11-26 11:52:04,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:52:04,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:52:04,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:04,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:52:04,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:52:04,487 INFO L87 Difference]: Start difference. First operand 83 states and 117 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-26 11:52:04,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:52:04,552 INFO L93 Difference]: Finished difference Result 177 states and 250 transitions. [2023-11-26 11:52:04,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:52:04,553 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 114 [2023-11-26 11:52:04,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:52:04,556 INFO L225 Difference]: With dead ends: 177 [2023-11-26 11:52:04,556 INFO L226 Difference]: Without dead ends: 95 [2023-11-26 11:52:04,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:52:04,559 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 65 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:52:04,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 410 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:52:04,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-11-26 11:52:04,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 86. [2023-11-26 11:52:04,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 68 states have (on average 1.2941176470588236) internal successors, (88), 68 states have internal predecessors, (88), 16 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-26 11:52:04,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 120 transitions. [2023-11-26 11:52:04,572 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 120 transitions. Word has length 114 [2023-11-26 11:52:04,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:52:04,573 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 120 transitions. [2023-11-26 11:52:04,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-26 11:52:04,573 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 120 transitions. [2023-11-26 11:52:04,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-11-26 11:52:04,576 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:52:04,576 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:52:04,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 11:52:04,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:04,784 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:52:04,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:04,784 INFO L85 PathProgramCache]: Analyzing trace with hash -80309382, now seen corresponding path program 1 times [2023-11-26 11:52:04,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:04,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281818098] [2023-11-26 11:52:04,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:04,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:04,862 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:52:04,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1928774376] [2023-11-26 11:52:04,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:04,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:04,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:04,876 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:52:04,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:52:05,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:05,070 INFO L262 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-26 11:52:05,077 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:06,048 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 15 [2023-11-26 11:52:06,261 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:52:06,261 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 52 treesize of output 28 [2023-11-26 11:52:06,302 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-11-26 11:52:06,302 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:52:06,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:06,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281818098] [2023-11-26 11:52:06,303 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:52:06,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928774376] [2023-11-26 11:52:06,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928774376] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:52:06,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:52:06,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 11:52:06,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097939084] [2023-11-26 11:52:06,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:52:06,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 11:52:06,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:06,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 11:52:06,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:52:06,310 INFO L87 Difference]: Start difference. First operand 86 states and 120 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-26 11:52:06,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:52:06,628 INFO L93 Difference]: Finished difference Result 126 states and 170 transitions. [2023-11-26 11:52:06,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 11:52:06,628 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 116 [2023-11-26 11:52:06,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:52:06,631 INFO L225 Difference]: With dead ends: 126 [2023-11-26 11:52:06,631 INFO L226 Difference]: Without dead ends: 124 [2023-11-26 11:52:06,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-11-26 11:52:06,633 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 193 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:52:06,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 477 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 11:52:06,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-11-26 11:52:06,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 110. [2023-11-26 11:52:06,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 92 states have (on average 1.2934782608695652) internal successors, (119), 92 states have internal predecessors, (119), 16 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-26 11:52:06,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 151 transitions. [2023-11-26 11:52:06,649 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 151 transitions. Word has length 116 [2023-11-26 11:52:06,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:52:06,650 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 151 transitions. [2023-11-26 11:52:06,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-26 11:52:06,650 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 151 transitions. [2023-11-26 11:52:06,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-11-26 11:52:06,653 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:52:06,653 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:52:06,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 11:52:06,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:06,860 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:52:06,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:06,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1148274937, now seen corresponding path program 1 times [2023-11-26 11:52:06,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:06,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751066062] [2023-11-26 11:52:06,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:06,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:06,923 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:52:06,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [987057168] [2023-11-26 11:52:06,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:06,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:06,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:06,928 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:52:06,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:52:07,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:07,125 INFO L262 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 77 conjunts are in the unsatisfiable core [2023-11-26 11:52:07,166 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:07,247 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 1 [2023-11-26 11:52:07,936 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-26 11:52:08,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 25 [2023-11-26 11:52:11,077 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2023-11-26 11:52:11,566 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 24 proven. 192 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2023-11-26 11:52:11,566 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:52:12,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:12,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751066062] [2023-11-26 11:52:12,257 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:52:12,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987057168] [2023-11-26 11:52:12,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987057168] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:52:12,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:52:12,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2023-11-26 11:52:12,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558856088] [2023-11-26 11:52:12,258 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-26 11:52:12,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-26 11:52:12,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:12,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-26 11:52:12,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=982, Unknown=0, NotChecked=0, Total=1122 [2023-11-26 11:52:12,260 INFO L87 Difference]: Start difference. First operand 110 states and 151 transitions. Second operand has 26 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 5 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2023-11-26 11:52:14,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:52:14,505 INFO L93 Difference]: Finished difference Result 168 states and 215 transitions. [2023-11-26 11:52:14,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-26 11:52:14,506 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 5 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 117 [2023-11-26 11:52:14,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:52:14,508 INFO L225 Difference]: With dead ends: 168 [2023-11-26 11:52:14,508 INFO L226 Difference]: Without dead ends: 166 [2023-11-26 11:52:14,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=393, Invalid=2259, Unknown=0, NotChecked=0, Total=2652 [2023-11-26 11:52:14,510 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 371 mSDsluCounter, 1329 mSDsCounter, 0 mSdLazyCounter, 964 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 1446 SdHoareTripleChecker+Invalid, 1035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:52:14,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [387 Valid, 1446 Invalid, 1035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 964 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-26 11:52:14,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2023-11-26 11:52:14,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 126. [2023-11-26 11:52:14,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 104 states have (on average 1.2596153846153846) internal successors, (131), 104 states have internal predecessors, (131), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-26 11:52:14,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 163 transitions. [2023-11-26 11:52:14,530 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 163 transitions. Word has length 117 [2023-11-26 11:52:14,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:52:14,530 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 163 transitions. [2023-11-26 11:52:14,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 5 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2023-11-26 11:52:14,531 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 163 transitions. [2023-11-26 11:52:14,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-11-26 11:52:14,533 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:52:14,533 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:52:14,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 11:52:14,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:14,740 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:52:14,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:14,741 INFO L85 PathProgramCache]: Analyzing trace with hash 965098533, now seen corresponding path program 1 times [2023-11-26 11:52:14,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:14,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243703179] [2023-11-26 11:52:14,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:14,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:14,776 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:52:14,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [152384185] [2023-11-26 11:52:14,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:14,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:14,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:14,778 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:52:14,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 11:52:14,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:14,976 INFO L262 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 80 conjunts are in the unsatisfiable core [2023-11-26 11:52:14,984 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:15,059 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 1 [2023-11-26 11:52:15,675 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-26 11:52:16,552 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 25 [2023-11-26 11:52:18,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:52:18,515 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-26 11:52:18,516 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 32 [2023-11-26 11:52:19,078 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 24 proven. 192 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2023-11-26 11:52:19,078 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:52:19,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:19,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243703179] [2023-11-26 11:52:19,718 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:52:19,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152384185] [2023-11-26 11:52:19,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152384185] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:52:19,720 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:52:19,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2023-11-26 11:52:19,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701490689] [2023-11-26 11:52:19,721 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-26 11:52:19,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-26 11:52:19,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:19,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-26 11:52:19,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1115, Unknown=0, NotChecked=0, Total=1260 [2023-11-26 11:52:19,724 INFO L87 Difference]: Start difference. First operand 126 states and 163 transitions. Second operand has 27 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 5 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2023-11-26 11:52:21,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:52:21,886 INFO L93 Difference]: Finished difference Result 185 states and 235 transitions. [2023-11-26 11:52:21,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-26 11:52:21,887 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 5 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 118 [2023-11-26 11:52:21,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:52:21,889 INFO L225 Difference]: With dead ends: 185 [2023-11-26 11:52:21,889 INFO L226 Difference]: Without dead ends: 183 [2023-11-26 11:52:21,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 723 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=457, Invalid=2735, Unknown=0, NotChecked=0, Total=3192 [2023-11-26 11:52:21,892 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 624 mSDsluCounter, 1012 mSDsCounter, 0 mSdLazyCounter, 874 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 640 SdHoareTripleChecker+Valid, 1094 SdHoareTripleChecker+Invalid, 944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-26 11:52:21,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [640 Valid, 1094 Invalid, 944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 874 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-26 11:52:21,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2023-11-26 11:52:21,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 149. [2023-11-26 11:52:21,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 127 states have (on average 1.2755905511811023) internal successors, (162), 127 states have internal predecessors, (162), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-26 11:52:21,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 194 transitions. [2023-11-26 11:52:21,911 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 194 transitions. Word has length 118 [2023-11-26 11:52:21,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:52:21,912 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 194 transitions. [2023-11-26 11:52:21,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 5 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2023-11-26 11:52:21,912 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 194 transitions. [2023-11-26 11:52:21,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-11-26 11:52:21,914 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:52:21,914 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:52:21,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 11:52:22,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-26 11:52:22,115 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:52:22,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:22,116 INFO L85 PathProgramCache]: Analyzing trace with hash 926800935, now seen corresponding path program 1 times [2023-11-26 11:52:22,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:22,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768703461] [2023-11-26 11:52:22,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:22,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:22,154 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:52:22,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [386284686] [2023-11-26 11:52:22,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:22,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:22,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:22,156 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:52:22,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 11:52:22,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:22,341 INFO L262 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-26 11:52:22,345 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:22,382 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-26 11:52:22,383 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 26 treesize of output 10 [2023-11-26 11:52:22,390 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-11-26 11:52:22,390 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:52:22,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:22,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768703461] [2023-11-26 11:52:22,390 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:52:22,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386284686] [2023-11-26 11:52:22,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386284686] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:52:22,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:52:22,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 11:52:22,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582756741] [2023-11-26 11:52:22,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:52:22,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:52:22,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:22,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:52:22,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:52:22,393 INFO L87 Difference]: Start difference. First operand 149 states and 194 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-26 11:52:22,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:52:22,494 INFO L93 Difference]: Finished difference Result 402 states and 514 transitions. [2023-11-26 11:52:22,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:52:22,495 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 119 [2023-11-26 11:52:22,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:52:22,498 INFO L225 Difference]: With dead ends: 402 [2023-11-26 11:52:22,498 INFO L226 Difference]: Without dead ends: 254 [2023-11-26 11:52:22,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:52:22,500 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 83 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:52:22,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 474 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:52:22,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2023-11-26 11:52:22,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 236. [2023-11-26 11:52:22,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 203 states have (on average 1.2315270935960592) internal successors, (250), 204 states have internal predecessors, (250), 22 states have call successors, (22), 10 states have call predecessors, (22), 10 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2023-11-26 11:52:22,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 294 transitions. [2023-11-26 11:52:22,524 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 294 transitions. Word has length 119 [2023-11-26 11:52:22,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:52:22,524 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 294 transitions. [2023-11-26 11:52:22,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-26 11:52:22,525 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 294 transitions. [2023-11-26 11:52:22,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-11-26 11:52:22,527 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:52:22,527 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:52:22,538 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-26 11:52:22,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-26 11:52:22,734 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:52:22,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:22,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1084696468, now seen corresponding path program 1 times [2023-11-26 11:52:22,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:22,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710620153] [2023-11-26 11:52:22,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:22,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:22,765 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:52:22,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1447271194] [2023-11-26 11:52:22,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:22,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:22,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:22,767 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:52:22,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 11:52:22,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:22,957 INFO L262 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-26 11:52:22,962 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:23,113 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 1 [2023-11-26 11:52:23,434 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 35 treesize of output 23 [2023-11-26 11:52:23,445 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 10 proven. 250 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-11-26 11:52:23,445 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:52:23,737 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 31 treesize of output 27 [2023-11-26 11:52:23,820 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 15 proven. 30 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2023-11-26 11:52:23,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:23,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710620153] [2023-11-26 11:52:23,821 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:52:23,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447271194] [2023-11-26 11:52:23,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447271194] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:52:23,821 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:52:23,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2023-11-26 11:52:23,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597807670] [2023-11-26 11:52:23,822 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:52:23,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-26 11:52:23,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:23,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-26 11:52:23,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2023-11-26 11:52:23,824 INFO L87 Difference]: Start difference. First operand 236 states and 294 transitions. Second operand has 15 states, 13 states have (on average 5.846153846153846) internal successors, (76), 14 states have internal predecessors, (76), 7 states have call successors, (32), 4 states have call predecessors, (32), 5 states have return successors, (32), 5 states have call predecessors, (32), 7 states have call successors, (32) [2023-11-26 11:52:24,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:52:24,366 INFO L93 Difference]: Finished difference Result 506 states and 621 transitions. [2023-11-26 11:52:24,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-26 11:52:24,369 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 5.846153846153846) internal successors, (76), 14 states have internal predecessors, (76), 7 states have call successors, (32), 4 states have call predecessors, (32), 5 states have return successors, (32), 5 states have call predecessors, (32), 7 states have call successors, (32) Word has length 119 [2023-11-26 11:52:24,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:52:24,372 INFO L225 Difference]: With dead ends: 506 [2023-11-26 11:52:24,373 INFO L226 Difference]: Without dead ends: 271 [2023-11-26 11:52:24,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=171, Invalid=429, Unknown=0, NotChecked=0, Total=600 [2023-11-26 11:52:24,374 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 103 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 11:52:24,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 528 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 11:52:24,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2023-11-26 11:52:24,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 181. [2023-11-26 11:52:24,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 158 states have (on average 1.2341772151898733) internal successors, (195), 158 states have internal predecessors, (195), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-26 11:52:24,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 227 transitions. [2023-11-26 11:52:24,395 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 227 transitions. Word has length 119 [2023-11-26 11:52:24,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:52:24,395 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 227 transitions. [2023-11-26 11:52:24,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 5.846153846153846) internal successors, (76), 14 states have internal predecessors, (76), 7 states have call successors, (32), 4 states have call predecessors, (32), 5 states have return successors, (32), 5 states have call predecessors, (32), 7 states have call successors, (32) [2023-11-26 11:52:24,396 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 227 transitions. [2023-11-26 11:52:24,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-11-26 11:52:24,398 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:52:24,398 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:52:24,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 11:52:24,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-26 11:52:24,605 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:52:24,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:24,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1147383922, now seen corresponding path program 1 times [2023-11-26 11:52:24,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:24,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366149771] [2023-11-26 11:52:24,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:24,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:24,638 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:52:24,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [808483472] [2023-11-26 11:52:24,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:24,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:24,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:24,654 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:52:24,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 11:52:24,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:24,850 INFO L262 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-26 11:52:24,855 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:25,025 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 1 [2023-11-26 11:52:25,161 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 1 [2023-11-26 11:52:25,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:52:25,685 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 15 [2023-11-26 11:52:25,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:52:25,864 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:52:25,865 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 52 treesize of output 28 [2023-11-26 11:52:25,902 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 192 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2023-11-26 11:52:25,902 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:52:26,088 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-11-26 11:52:26,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:26,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366149771] [2023-11-26 11:52:26,089 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:52:26,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808483472] [2023-11-26 11:52:26,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808483472] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-26 11:52:26,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:52:26,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 17 [2023-11-26 11:52:26,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292670545] [2023-11-26 11:52:26,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:52:26,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 11:52:26,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:26,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 11:52:26,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2023-11-26 11:52:26,096 INFO L87 Difference]: Start difference. First operand 181 states and 227 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-26 11:52:26,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:52:26,324 INFO L93 Difference]: Finished difference Result 203 states and 252 transitions. [2023-11-26 11:52:26,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:52:26,325 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 119 [2023-11-26 11:52:26,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:52:26,327 INFO L225 Difference]: With dead ends: 203 [2023-11-26 11:52:26,327 INFO L226 Difference]: Without dead ends: 201 [2023-11-26 11:52:26,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2023-11-26 11:52:26,329 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 77 mSDsluCounter, 720 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 865 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:52:26,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 865 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:52:26,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2023-11-26 11:52:26,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 153. [2023-11-26 11:52:26,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 130 states have (on average 1.2307692307692308) internal successors, (160), 130 states have internal predecessors, (160), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-26 11:52:26,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 192 transitions. [2023-11-26 11:52:26,347 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 192 transitions. Word has length 119 [2023-11-26 11:52:26,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:52:26,348 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 192 transitions. [2023-11-26 11:52:26,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-26 11:52:26,348 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 192 transitions. [2023-11-26 11:52:26,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-11-26 11:52:26,350 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:52:26,350 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:52:26,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 11:52:26,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:26,556 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:52:26,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:26,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1212399850, now seen corresponding path program 1 times [2023-11-26 11:52:26,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:26,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456064426] [2023-11-26 11:52:26,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:26,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:26,587 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:52:26,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [475962436] [2023-11-26 11:52:26,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:26,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:26,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:26,589 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:52:26,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 11:52:26,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:26,790 INFO L262 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-26 11:52:26,795 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:27,174 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 1 [2023-11-26 11:52:28,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:52:28,102 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-26 11:52:28,193 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 35 treesize of output 23 [2023-11-26 11:52:28,209 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 10 proven. 250 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-11-26 11:52:28,209 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:52:28,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:28,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456064426] [2023-11-26 11:52:28,292 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:52:28,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475962436] [2023-11-26 11:52:28,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475962436] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:52:28,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:52:28,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-11-26 11:52:28,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287878064] [2023-11-26 11:52:28,293 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-26 11:52:28,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 11:52:28,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:28,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 11:52:28,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2023-11-26 11:52:28,294 INFO L87 Difference]: Start difference. First operand 153 states and 192 transitions. Second operand has 10 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2023-11-26 11:52:28,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:52:28,784 INFO L93 Difference]: Finished difference Result 309 states and 387 transitions. [2023-11-26 11:52:28,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-26 11:52:28,790 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) Word has length 120 [2023-11-26 11:52:28,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:52:28,792 INFO L225 Difference]: With dead ends: 309 [2023-11-26 11:52:28,792 INFO L226 Difference]: Without dead ends: 157 [2023-11-26 11:52:28,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2023-11-26 11:52:28,794 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 142 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:52:28,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 335 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 11:52:28,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2023-11-26 11:52:28,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 153. [2023-11-26 11:52:28,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 130 states have (on average 1.2230769230769232) internal successors, (159), 130 states have internal predecessors, (159), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-26 11:52:28,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 191 transitions. [2023-11-26 11:52:28,813 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 191 transitions. Word has length 120 [2023-11-26 11:52:28,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:52:28,813 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 191 transitions. [2023-11-26 11:52:28,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 2 states have call predecessors, (16), 3 states have call successors, (16) [2023-11-26 11:52:28,814 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 191 transitions. [2023-11-26 11:52:28,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-11-26 11:52:28,815 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:52:28,815 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:52:28,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-26 11:52:29,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:29,021 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:52:29,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:29,022 INFO L85 PathProgramCache]: Analyzing trace with hash 404790098, now seen corresponding path program 1 times [2023-11-26 11:52:29,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:29,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60085661] [2023-11-26 11:52:29,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:29,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:29,048 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:52:29,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1411297212] [2023-11-26 11:52:29,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:29,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:29,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:29,050 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:52:29,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-26 11:52:29,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:29,261 INFO L262 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-26 11:52:29,265 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:29,417 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:52:29,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 62 [2023-11-26 11:52:29,467 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-11-26 11:52:29,467 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:52:29,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:29,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60085661] [2023-11-26 11:52:29,468 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:52:29,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411297212] [2023-11-26 11:52:29,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411297212] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:52:29,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:52:29,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 11:52:29,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2266415] [2023-11-26 11:52:29,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:52:29,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:52:29,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:29,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:52:29,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:52:29,470 INFO L87 Difference]: Start difference. First operand 153 states and 191 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-26 11:52:29,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:52:29,761 INFO L93 Difference]: Finished difference Result 395 states and 484 transitions. [2023-11-26 11:52:29,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:52:29,762 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 121 [2023-11-26 11:52:29,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:52:29,764 INFO L225 Difference]: With dead ends: 395 [2023-11-26 11:52:29,764 INFO L226 Difference]: Without dead ends: 243 [2023-11-26 11:52:29,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:52:29,766 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 75 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:52:29,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 504 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 11:52:29,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2023-11-26 11:52:29,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 239. [2023-11-26 11:52:29,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 200 states have (on average 1.185) internal successors, (237), 201 states have internal predecessors, (237), 26 states have call successors, (26), 12 states have call predecessors, (26), 12 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-26 11:52:29,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 289 transitions. [2023-11-26 11:52:29,800 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 289 transitions. Word has length 121 [2023-11-26 11:52:29,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:52:29,801 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 289 transitions. [2023-11-26 11:52:29,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-26 11:52:29,801 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 289 transitions. [2023-11-26 11:52:29,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-11-26 11:52:29,809 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:52:29,809 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:52:29,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-26 11:52:30,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:30,016 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:52:30,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:30,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1323312016, now seen corresponding path program 1 times [2023-11-26 11:52:30,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:30,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682622156] [2023-11-26 11:52:30,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:30,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:30,044 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:52:30,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [807870278] [2023-11-26 11:52:30,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:30,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:30,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:30,046 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:52:30,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-26 11:52:30,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:30,321 INFO L262 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-26 11:52:30,326 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:30,428 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:52:30,428 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 64 [2023-11-26 11:52:30,466 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-11-26 11:52:30,467 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:52:30,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:30,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682622156] [2023-11-26 11:52:30,467 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:52:30,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807870278] [2023-11-26 11:52:30,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807870278] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:52:30,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:52:30,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 11:52:30,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969601978] [2023-11-26 11:52:30,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:52:30,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:52:30,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:30,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:52:30,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:52:30,470 INFO L87 Difference]: Start difference. First operand 239 states and 289 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-26 11:52:30,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:52:30,754 INFO L93 Difference]: Finished difference Result 476 states and 572 transitions. [2023-11-26 11:52:30,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:52:30,755 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 122 [2023-11-26 11:52:30,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:52:30,757 INFO L225 Difference]: With dead ends: 476 [2023-11-26 11:52:30,757 INFO L226 Difference]: Without dead ends: 238 [2023-11-26 11:52:30,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:52:30,759 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 57 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:52:30,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 331 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 11:52:30,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2023-11-26 11:52:30,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 185. [2023-11-26 11:52:30,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 161 states have (on average 1.204968944099379) internal successors, (194), 161 states have internal predecessors, (194), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-26 11:52:30,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 226 transitions. [2023-11-26 11:52:30,785 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 226 transitions. Word has length 122 [2023-11-26 11:52:30,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:52:30,785 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 226 transitions. [2023-11-26 11:52:30,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-26 11:52:30,786 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 226 transitions. [2023-11-26 11:52:30,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-11-26 11:52:30,787 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:52:30,787 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:52:30,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-26 11:52:30,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:30,994 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:52:30,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:30,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1005736451, now seen corresponding path program 1 times [2023-11-26 11:52:30,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:30,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642422973] [2023-11-26 11:52:30,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:30,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:31,023 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:52:31,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1273169865] [2023-11-26 11:52:31,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:31,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:31,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:31,025 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:52:31,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-26 11:52:31,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:31,294 INFO L262 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-26 11:52:31,298 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:31,955 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:52:31,956 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 56 treesize of output 40 [2023-11-26 11:52:31,992 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-11-26 11:52:31,992 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:52:31,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:31,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642422973] [2023-11-26 11:52:31,992 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:52:31,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273169865] [2023-11-26 11:52:31,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273169865] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:52:31,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:52:31,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 11:52:31,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782919253] [2023-11-26 11:52:31,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:52:31,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:52:31,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:31,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:52:31,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:52:31,994 INFO L87 Difference]: Start difference. First operand 185 states and 226 transitions. Second operand has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-26 11:52:36,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:52:36,249 INFO L93 Difference]: Finished difference Result 426 states and 513 transitions. [2023-11-26 11:52:36,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:52:36,250 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 123 [2023-11-26 11:52:36,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:52:36,251 INFO L225 Difference]: With dead ends: 426 [2023-11-26 11:52:36,251 INFO L226 Difference]: Without dead ends: 242 [2023-11-26 11:52:36,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:52:36,252 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 80 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:52:36,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 495 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-11-26 11:52:36,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2023-11-26 11:52:36,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 185. [2023-11-26 11:52:36,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 161 states have (on average 1.1987577639751552) internal successors, (193), 161 states have internal predecessors, (193), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-26 11:52:36,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 225 transitions. [2023-11-26 11:52:36,281 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 225 transitions. Word has length 123 [2023-11-26 11:52:36,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:52:36,282 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 225 transitions. [2023-11-26 11:52:36,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-26 11:52:36,282 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 225 transitions. [2023-11-26 11:52:36,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-11-26 11:52:36,284 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:52:36,284 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:52:36,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-26 11:52:36,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:36,491 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:52:36,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:36,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1818255933, now seen corresponding path program 1 times [2023-11-26 11:52:36,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:36,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299853020] [2023-11-26 11:52:36,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:36,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:36,516 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:52:36,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [827978490] [2023-11-26 11:52:36,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:36,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:36,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:36,518 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:52:36,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-26 11:52:36,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:36,774 INFO L262 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-26 11:52:36,778 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:36,871 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:52:36,872 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 56 treesize of output 40 [2023-11-26 11:52:36,904 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-11-26 11:52:36,904 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:52:36,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:36,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299853020] [2023-11-26 11:52:36,904 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:52:36,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827978490] [2023-11-26 11:52:36,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827978490] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:52:36,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:52:36,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 11:52:36,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327318100] [2023-11-26 11:52:36,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:52:36,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:52:36,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:36,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:52:36,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:52:36,908 INFO L87 Difference]: Start difference. First operand 185 states and 225 transitions. Second operand has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-26 11:52:39,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:52:39,563 INFO L93 Difference]: Finished difference Result 422 states and 506 transitions. [2023-11-26 11:52:39,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:52:39,566 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 123 [2023-11-26 11:52:39,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:52:39,569 INFO L225 Difference]: With dead ends: 422 [2023-11-26 11:52:39,570 INFO L226 Difference]: Without dead ends: 238 [2023-11-26 11:52:39,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:52:39,572 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 69 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-11-26 11:52:39,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 386 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-11-26 11:52:39,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2023-11-26 11:52:39,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 185. [2023-11-26 11:52:39,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 161 states have (on average 1.1925465838509317) internal successors, (192), 161 states have internal predecessors, (192), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-26 11:52:39,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 224 transitions. [2023-11-26 11:52:39,609 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 224 transitions. Word has length 123 [2023-11-26 11:52:39,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:52:39,610 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 224 transitions. [2023-11-26 11:52:39,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-26 11:52:39,610 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 224 transitions. [2023-11-26 11:52:39,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-11-26 11:52:39,612 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:52:39,612 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:52:39,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-26 11:52:39,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-26 11:52:39,821 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:52:39,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:39,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1363403663, now seen corresponding path program 1 times [2023-11-26 11:52:39,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:39,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319001843] [2023-11-26 11:52:39,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:39,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:39,852 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:52:39,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [371263700] [2023-11-26 11:52:39,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:39,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:39,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:39,854 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:52:39,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-26 11:52:40,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:40,103 INFO L262 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-26 11:52:40,107 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:40,145 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:52:40,145 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 30 treesize of output 26 [2023-11-26 11:52:40,160 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-11-26 11:52:40,160 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:52:40,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:40,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319001843] [2023-11-26 11:52:40,160 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:52:40,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371263700] [2023-11-26 11:52:40,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371263700] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:52:40,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:52:40,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 11:52:40,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863401268] [2023-11-26 11:52:40,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:52:40,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:52:40,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:40,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:52:40,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:52:40,164 INFO L87 Difference]: Start difference. First operand 185 states and 224 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-26 11:52:40,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:52:40,428 INFO L93 Difference]: Finished difference Result 423 states and 508 transitions. [2023-11-26 11:52:40,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:52:40,432 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 124 [2023-11-26 11:52:40,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:52:40,434 INFO L225 Difference]: With dead ends: 423 [2023-11-26 11:52:40,435 INFO L226 Difference]: Without dead ends: 239 [2023-11-26 11:52:40,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:52:40,436 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 60 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:52:40,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 340 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 11:52:40,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2023-11-26 11:52:40,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 187. [2023-11-26 11:52:40,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 163 states have (on average 1.196319018404908) internal successors, (195), 163 states have internal predecessors, (195), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-26 11:52:40,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 227 transitions. [2023-11-26 11:52:40,467 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 227 transitions. Word has length 124 [2023-11-26 11:52:40,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:52:40,468 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 227 transitions. [2023-11-26 11:52:40,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-26 11:52:40,469 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 227 transitions. [2023-11-26 11:52:40,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-11-26 11:52:40,470 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:52:40,470 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:52:40,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-26 11:52:40,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-26 11:52:40,677 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:52:40,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:40,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1126125299, now seen corresponding path program 1 times [2023-11-26 11:52:40,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:40,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630481260] [2023-11-26 11:52:40,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:40,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:40,723 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:52:40,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [355418688] [2023-11-26 11:52:40,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:40,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:40,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:40,730 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:52:40,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-26 11:52:40,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:40,966 INFO L262 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-26 11:52:40,973 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:42,586 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 1 [2023-11-26 11:52:42,896 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 24 [2023-11-26 11:52:43,132 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2023-11-26 11:52:43,132 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:52:43,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:43,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630481260] [2023-11-26 11:52:43,759 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:52:43,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355418688] [2023-11-26 11:52:43,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355418688] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:52:43,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:52:43,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-11-26 11:52:43,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696834259] [2023-11-26 11:52:43,759 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-26 11:52:43,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 11:52:43,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:43,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 11:52:43,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-11-26 11:52:43,761 INFO L87 Difference]: Start difference. First operand 187 states and 227 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2023-11-26 11:52:44,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:52:44,994 INFO L93 Difference]: Finished difference Result 561 states and 679 transitions. [2023-11-26 11:52:44,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:52:44,995 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 124 [2023-11-26 11:52:44,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:52:44,997 INFO L225 Difference]: With dead ends: 561 [2023-11-26 11:52:44,998 INFO L226 Difference]: Without dead ends: 375 [2023-11-26 11:52:44,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2023-11-26 11:52:44,999 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 336 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-26 11:52:44,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 629 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-26 11:52:45,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2023-11-26 11:52:45,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 223. [2023-11-26 11:52:45,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 199 states have (on average 1.2060301507537687) internal successors, (240), 199 states have internal predecessors, (240), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-26 11:52:45,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 272 transitions. [2023-11-26 11:52:45,038 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 272 transitions. Word has length 124 [2023-11-26 11:52:45,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:52:45,039 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 272 transitions. [2023-11-26 11:52:45,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2023-11-26 11:52:45,040 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 272 transitions. [2023-11-26 11:52:45,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-11-26 11:52:45,042 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:52:45,042 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:52:45,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-26 11:52:45,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-26 11:52:45,249 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:52:45,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:45,249 INFO L85 PathProgramCache]: Analyzing trace with hash -818423300, now seen corresponding path program 1 times [2023-11-26 11:52:45,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:45,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871243447] [2023-11-26 11:52:45,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:45,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:45,280 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:52:45,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1377221672] [2023-11-26 11:52:45,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:45,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:45,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:45,282 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:52:45,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-26 11:52:45,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:45,544 INFO L262 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-26 11:52:45,552 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:46,968 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 1 [2023-11-26 11:52:47,309 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-26 11:52:47,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:52:47,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:52:47,797 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 25 [2023-11-26 11:52:48,030 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 40 proven. 115 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2023-11-26 11:52:48,030 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:52:48,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:48,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871243447] [2023-11-26 11:52:48,211 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:52:48,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377221672] [2023-11-26 11:52:48,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377221672] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:52:48,211 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:52:48,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-11-26 11:52:48,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055026277] [2023-11-26 11:52:48,212 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-26 11:52:48,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-26 11:52:48,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:48,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-26 11:52:48,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2023-11-26 11:52:48,214 INFO L87 Difference]: Start difference. First operand 223 states and 272 transitions. Second operand has 15 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2023-11-26 11:52:49,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:52:49,502 INFO L93 Difference]: Finished difference Result 510 states and 617 transitions. [2023-11-26 11:52:49,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-26 11:52:49,503 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) Word has length 124 [2023-11-26 11:52:49,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:52:49,505 INFO L225 Difference]: With dead ends: 510 [2023-11-26 11:52:49,505 INFO L226 Difference]: Without dead ends: 285 [2023-11-26 11:52:49,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=180, Invalid=750, Unknown=0, NotChecked=0, Total=930 [2023-11-26 11:52:49,507 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 395 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 632 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-26 11:52:49,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [396 Valid, 632 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 649 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-26 11:52:49,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2023-11-26 11:52:49,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 231. [2023-11-26 11:52:49,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 205 states have (on average 1.1853658536585365) internal successors, (243), 205 states have internal predecessors, (243), 16 states have call successors, (16), 9 states have call predecessors, (16), 9 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-26 11:52:49,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 275 transitions. [2023-11-26 11:52:49,545 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 275 transitions. Word has length 124 [2023-11-26 11:52:49,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:52:49,545 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 275 transitions. [2023-11-26 11:52:49,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (16), 3 states have call predecessors, (16), 4 states have call successors, (16) [2023-11-26 11:52:49,546 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 275 transitions. [2023-11-26 11:52:49,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-11-26 11:52:49,547 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:52:49,547 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:52:49,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-26 11:52:49,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-26 11:52:49,754 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:52:49,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:49,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1827189877, now seen corresponding path program 1 times [2023-11-26 11:52:49,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:49,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831271186] [2023-11-26 11:52:49,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:49,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:49,778 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:52:49,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2004819593] [2023-11-26 11:52:49,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:49,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:49,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:49,780 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:52:49,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-26 11:52:50,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:50,014 INFO L262 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-26 11:52:50,018 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:50,050 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:52:50,053 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 30 treesize of output 26 [2023-11-26 11:52:50,065 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-11-26 11:52:50,065 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:52:50,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:50,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831271186] [2023-11-26 11:52:50,065 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:52:50,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004819593] [2023-11-26 11:52:50,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004819593] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:52:50,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:52:50,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 11:52:50,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665273003] [2023-11-26 11:52:50,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:52:50,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:52:50,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:50,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:52:50,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:52:50,071 INFO L87 Difference]: Start difference. First operand 231 states and 275 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-26 11:52:50,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:52:50,348 INFO L93 Difference]: Finished difference Result 616 states and 724 transitions. [2023-11-26 11:52:50,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:52:50,348 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 124 [2023-11-26 11:52:50,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:52:50,351 INFO L225 Difference]: With dead ends: 616 [2023-11-26 11:52:50,352 INFO L226 Difference]: Without dead ends: 386 [2023-11-26 11:52:50,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:52:50,353 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 174 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:52:50,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 395 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 11:52:50,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2023-11-26 11:52:50,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 234. [2023-11-26 11:52:50,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 208 states have (on average 1.1826923076923077) internal successors, (246), 208 states have internal predecessors, (246), 16 states have call successors, (16), 9 states have call predecessors, (16), 9 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-26 11:52:50,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 278 transitions. [2023-11-26 11:52:50,396 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 278 transitions. Word has length 124 [2023-11-26 11:52:50,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:52:50,396 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 278 transitions. [2023-11-26 11:52:50,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-26 11:52:50,397 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 278 transitions. [2023-11-26 11:52:50,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-11-26 11:52:50,398 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:52:50,398 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:52:50,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-26 11:52:50,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-26 11:52:50,605 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:52:50,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:50,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1787719049, now seen corresponding path program 1 times [2023-11-26 11:52:50,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:50,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817381082] [2023-11-26 11:52:50,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:50,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:50,633 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:52:50,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1936546088] [2023-11-26 11:52:50,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:50,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:52:50,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:52:50,635 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:52:50,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aee72d9-08df-4e30-ab9d-dc3170b9245a/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-26 11:52:50,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:50,881 INFO L262 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-26 11:52:50,885 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:52:52,409 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 1