./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-36.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-36.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl --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 c7e974c6e5fec01354043338f8cc30b791da3683a39f1bcafe943125c6faad54 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:30:25,111 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:30:25,196 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:30:25,208 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:30:25,209 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:30:25,250 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:30:25,251 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:30:25,252 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:30:25,253 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:30:25,258 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:30:25,259 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:30:25,259 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:30:25,260 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:30:25,261 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:30:25,262 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:30:25,262 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:30:25,263 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:30:25,263 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:30:25,264 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:30:25,264 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:30:25,264 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:30:25,265 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:30:25,265 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:30:25,266 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:30:25,266 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:30:25,267 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:30:25,267 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:30:25,268 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:30:25,268 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:30:25,269 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:30:25,270 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:30:25,270 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:30:25,271 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:30:25,271 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:30:25,271 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:30:25,271 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:30:25,272 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:30:25,272 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:30:25,272 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:30:25,272 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_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c7e974c6e5fec01354043338f8cc30b791da3683a39f1bcafe943125c6faad54 [2023-11-12 02:30:25,600 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:30:25,633 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:30:25,635 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:30:25,637 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:30:25,641 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:30:25,642 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-36.i [2023-11-12 02:30:28,996 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:30:29,376 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:30:29,376 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-36.i [2023-11-12 02:30:29,397 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/data/7097ccc5f/3782305dccd9412aadd9eb346e092df4/FLAG72276e667 [2023-11-12 02:30:29,414 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/data/7097ccc5f/3782305dccd9412aadd9eb346e092df4 [2023-11-12 02:30:29,417 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:30:29,419 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:30:29,421 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:30:29,421 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:30:29,427 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:30:29,428 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:30:29" (1/1) ... [2023-11-12 02:30:29,430 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4645c5ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:30:29, skipping insertion in model container [2023-11-12 02:30:29,430 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:30:29" (1/1) ... [2023-11-12 02:30:29,492 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:30:29,709 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_30bcb9da-1960-48f9-9129-1c2c6f81e77e/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-36.i[916,929] [2023-11-12 02:30:29,908 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:30:29,930 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:30:29,948 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_30bcb9da-1960-48f9-9129-1c2c6f81e77e/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-36.i[916,929] [2023-11-12 02:30:30,100 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:30:30,131 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:30:30,132 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:30:30 WrapperNode [2023-11-12 02:30:30,132 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:30:30,134 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:30:30,134 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:30:30,134 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:30:30,143 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:30:30" (1/1) ... [2023-11-12 02:30:30,180 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:30:30" (1/1) ... [2023-11-12 02:30:30,347 INFO L138 Inliner]: procedures = 26, calls = 69, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 484 [2023-11-12 02:30:30,348 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:30:30,349 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:30:30,350 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:30:30,350 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:30:30,361 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:30:30" (1/1) ... [2023-11-12 02:30:30,361 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:30:30" (1/1) ... [2023-11-12 02:30:30,380 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:30:30" (1/1) ... [2023-11-12 02:30:30,381 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:30:30" (1/1) ... [2023-11-12 02:30:30,422 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:30:30" (1/1) ... [2023-11-12 02:30:30,429 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:30:30" (1/1) ... [2023-11-12 02:30:30,439 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:30:30" (1/1) ... [2023-11-12 02:30:30,446 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:30:30" (1/1) ... [2023-11-12 02:30:30,480 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:30:30,481 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:30:30,481 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:30:30,481 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:30:30,482 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:30:30" (1/1) ... [2023-11-12 02:30:30,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:30:30,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:30:30,517 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:30:30,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:30:30,564 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:30:30,565 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 02:30:30,565 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 02:30:30,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:30:30,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:30:30,566 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:30:30,699 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:30:30,701 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:30:31,923 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:30:31,938 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:30:31,939 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 02:30:31,942 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:30:31 BoogieIcfgContainer [2023-11-12 02:30:31,942 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:30:31,948 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:30:31,949 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:30:31,953 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:30:31,953 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:30:29" (1/3) ... [2023-11-12 02:30:31,954 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@253db170 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:30:31, skipping insertion in model container [2023-11-12 02:30:31,954 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:30:30" (2/3) ... [2023-11-12 02:30:31,956 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@253db170 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:30:31, skipping insertion in model container [2023-11-12 02:30:31,956 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:30:31" (3/3) ... [2023-11-12 02:30:31,957 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount250_file-36.i [2023-11-12 02:30:31,980 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:30:31,981 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:30:32,069 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:30:32,079 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;@2f72ed5b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:30:32,079 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 02:30:32,086 INFO L276 IsEmpty]: Start isEmpty. Operand has 197 states, 138 states have (on average 1.5) internal successors, (207), 139 states have internal predecessors, (207), 56 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) [2023-11-12 02:30:32,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2023-11-12 02:30:32,122 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:30:32,123 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:30:32,124 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:30:32,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:30:32,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1923556289, now seen corresponding path program 1 times [2023-11-12 02:30:32,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:30:32,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642623679] [2023-11-12 02:30:32,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:32,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:30:32,452 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:30:32,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [587597011] [2023-11-12 02:30:32,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:32,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:30:32,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:30:32,457 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:30:32,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:30:32,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:30:32,933 INFO L262 TraceCheckSpWp]: Trace formula consists of 911 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:30:32,957 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:30:33,142 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6160 trivial. 0 not checked. [2023-11-12 02:30:33,142 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:30:33,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:30:33,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642623679] [2023-11-12 02:30:33,143 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:30:33,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587597011] [2023-11-12 02:30:33,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587597011] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:30:33,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:30:33,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:30:33,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496769769] [2023-11-12 02:30:33,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:30:33,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:30:33,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:30:33,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:30:33,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:30:33,204 INFO L87 Difference]: Start difference. First operand has 197 states, 138 states have (on average 1.5) internal successors, (207), 139 states have internal predecessors, (207), 56 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-12 02:30:33,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:30:33,361 INFO L93 Difference]: Finished difference Result 574 states and 1051 transitions. [2023-11-12 02:30:33,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:30:33,364 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) Word has length 370 [2023-11-12 02:30:33,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:30:33,382 INFO L225 Difference]: With dead ends: 574 [2023-11-12 02:30:33,382 INFO L226 Difference]: Without dead ends: 380 [2023-11-12 02:30:33,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 368 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:30:33,394 INFO L413 NwaCegarLoop]: 479 mSDtfsCounter, 275 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 778 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:30:33,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 778 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:30:33,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2023-11-12 02:30:33,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 226. [2023-11-12 02:30:33,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 168 states have (on average 1.5238095238095237) internal successors, (256), 168 states have internal predecessors, (256), 56 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) [2023-11-12 02:30:33,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 368 transitions. [2023-11-12 02:30:33,489 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 368 transitions. Word has length 370 [2023-11-12 02:30:33,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:30:33,515 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 368 transitions. [2023-11-12 02:30:33,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-12 02:30:33,516 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 368 transitions. [2023-11-12 02:30:33,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2023-11-12 02:30:33,527 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:30:33,528 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:30:33,536 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-12 02:30:33,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-12 02:30:33,736 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:30:33,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:30:33,737 INFO L85 PathProgramCache]: Analyzing trace with hash 234612547, now seen corresponding path program 1 times [2023-11-12 02:30:33,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:30:33,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415788767] [2023-11-12 02:30:33,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:33,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:30:33,872 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:30:33,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1456303024] [2023-11-12 02:30:33,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:33,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:30:33,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:30:33,875 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:30:33,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:30:34,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:30:34,234 INFO L262 TraceCheckSpWp]: Trace formula consists of 910 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-12 02:30:34,249 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:30:34,848 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6160 trivial. 0 not checked. [2023-11-12 02:30:34,848 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:30:34,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:30:34,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415788767] [2023-11-12 02:30:34,849 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:30:34,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456303024] [2023-11-12 02:30:34,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456303024] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:30:34,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:30:34,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:30:34,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497883065] [2023-11-12 02:30:34,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:30:34,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:30:34,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:30:34,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:30:34,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:30:34,856 INFO L87 Difference]: Start difference. First operand 226 states and 368 transitions. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-12 02:30:35,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:30:35,267 INFO L93 Difference]: Finished difference Result 672 states and 1097 transitions. [2023-11-12 02:30:35,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:30:35,268 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) Word has length 370 [2023-11-12 02:30:35,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:30:35,275 INFO L225 Difference]: With dead ends: 672 [2023-11-12 02:30:35,275 INFO L226 Difference]: Without dead ends: 449 [2023-11-12 02:30:35,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 367 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:30:35,282 INFO L413 NwaCegarLoop]: 307 mSDtfsCounter, 289 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 1171 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 02:30:35,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 1171 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 02:30:35,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2023-11-12 02:30:35,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 321. [2023-11-12 02:30:35,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 206 states have (on average 1.4174757281553398) internal successors, (292), 206 states have internal predecessors, (292), 112 states have call successors, (112), 2 states have call predecessors, (112), 2 states have return successors, (112), 112 states have call predecessors, (112), 112 states have call successors, (112) [2023-11-12 02:30:35,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 516 transitions. [2023-11-12 02:30:35,372 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 516 transitions. Word has length 370 [2023-11-12 02:30:35,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:30:35,378 INFO L495 AbstractCegarLoop]: Abstraction has 321 states and 516 transitions. [2023-11-12 02:30:35,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-12 02:30:35,380 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 516 transitions. [2023-11-12 02:30:35,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2023-11-12 02:30:35,393 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:30:35,394 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:30:35,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:30:35,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:30:35,604 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:30:35,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:30:35,604 INFO L85 PathProgramCache]: Analyzing trace with hash 94063937, now seen corresponding path program 1 times [2023-11-12 02:30:35,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:30:35,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903865377] [2023-11-12 02:30:35,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:35,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:30:35,697 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:30:35,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [141400847] [2023-11-12 02:30:35,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:35,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:30:35,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:30:35,699 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:30:35,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:30:36,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:30:36,008 INFO L262 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-12 02:30:36,019 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:30:37,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6160 trivial. 0 not checked. [2023-11-12 02:30:37,533 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:30:37,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:30:37,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903865377] [2023-11-12 02:30:37,534 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:30:37,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141400847] [2023-11-12 02:30:37,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141400847] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:30:37,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:30:37,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:30:37,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100243587] [2023-11-12 02:30:37,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:30:37,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:30:37,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:30:37,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:30:37,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:30:37,538 INFO L87 Difference]: Start difference. First operand 321 states and 516 transitions. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-12 02:30:37,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:30:37,881 INFO L93 Difference]: Finished difference Result 672 states and 1090 transitions. [2023-11-12 02:30:37,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:30:37,882 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) Word has length 370 [2023-11-12 02:30:37,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:30:37,887 INFO L225 Difference]: With dead ends: 672 [2023-11-12 02:30:37,887 INFO L226 Difference]: Without dead ends: 449 [2023-11-12 02:30:37,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:30:37,889 INFO L413 NwaCegarLoop]: 305 mSDtfsCounter, 210 mSDsluCounter, 883 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 1188 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 02:30:37,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 1188 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 02:30:37,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2023-11-12 02:30:37,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 423. [2023-11-12 02:30:37,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 308 states have (on average 1.5064935064935066) internal successors, (464), 308 states have internal predecessors, (464), 112 states have call successors, (112), 2 states have call predecessors, (112), 2 states have return successors, (112), 112 states have call predecessors, (112), 112 states have call successors, (112) [2023-11-12 02:30:37,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 688 transitions. [2023-11-12 02:30:37,936 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 688 transitions. Word has length 370 [2023-11-12 02:30:37,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:30:37,938 INFO L495 AbstractCegarLoop]: Abstraction has 423 states and 688 transitions. [2023-11-12 02:30:37,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-12 02:30:37,938 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 688 transitions. [2023-11-12 02:30:37,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2023-11-12 02:30:37,946 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:30:37,947 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:30:37,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:30:38,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:30:38,156 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:30:38,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:30:38,157 INFO L85 PathProgramCache]: Analyzing trace with hash 2110775538, now seen corresponding path program 1 times [2023-11-12 02:30:38,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:30:38,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312572796] [2023-11-12 02:30:38,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:38,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:30:38,290 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:30:38,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [967301678] [2023-11-12 02:30:38,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:38,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:30:38,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:30:38,303 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:30:38,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:30:38,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:30:38,630 INFO L262 TraceCheckSpWp]: Trace formula consists of 905 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 02:30:38,667 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:30:38,786 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6160 trivial. 0 not checked. [2023-11-12 02:30:38,786 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:30:38,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:30:38,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312572796] [2023-11-12 02:30:38,786 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:30:38,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967301678] [2023-11-12 02:30:38,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967301678] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:30:38,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:30:38,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:30:38,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846058598] [2023-11-12 02:30:38,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:30:38,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:30:38,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:30:38,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:30:38,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:30:38,790 INFO L87 Difference]: Start difference. First operand 423 states and 688 transitions. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-12 02:30:39,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:30:39,254 INFO L93 Difference]: Finished difference Result 903 states and 1466 transitions. [2023-11-12 02:30:39,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:30:39,257 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) Word has length 372 [2023-11-12 02:30:39,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:30:39,263 INFO L225 Difference]: With dead ends: 903 [2023-11-12 02:30:39,263 INFO L226 Difference]: Without dead ends: 667 [2023-11-12 02:30:39,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 368 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:30:39,265 INFO L413 NwaCegarLoop]: 402 mSDtfsCounter, 182 mSDsluCounter, 997 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 1399 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 02:30:39,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 1399 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 02:30:39,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2023-11-12 02:30:39,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 664. [2023-11-12 02:30:39,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 520 states have (on average 1.5288461538461537) internal successors, (795), 521 states have internal predecessors, (795), 140 states have call successors, (140), 3 states have call predecessors, (140), 3 states have return successors, (140), 139 states have call predecessors, (140), 140 states have call successors, (140) [2023-11-12 02:30:39,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 1075 transitions. [2023-11-12 02:30:39,334 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 1075 transitions. Word has length 372 [2023-11-12 02:30:39,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:30:39,335 INFO L495 AbstractCegarLoop]: Abstraction has 664 states and 1075 transitions. [2023-11-12 02:30:39,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-12 02:30:39,336 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 1075 transitions. [2023-11-12 02:30:39,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2023-11-12 02:30:39,340 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:30:39,341 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:30:39,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:30:39,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:30:39,550 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:30:39,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:30:39,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1394926704, now seen corresponding path program 1 times [2023-11-12 02:30:39,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:30:39,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58137835] [2023-11-12 02:30:39,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:39,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:30:39,636 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:30:39,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [566563478] [2023-11-12 02:30:39,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:39,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:30:39,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:30:39,639 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:30:39,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:30:39,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:30:39,969 INFO L262 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:30:39,978 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:30:40,036 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6160 trivial. 0 not checked. [2023-11-12 02:30:40,036 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:30:40,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:30:40,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58137835] [2023-11-12 02:30:40,037 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:30:40,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566563478] [2023-11-12 02:30:40,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566563478] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:30:40,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:30:40,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:30:40,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180036799] [2023-11-12 02:30:40,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:30:40,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:30:40,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:30:40,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:30:40,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:30:40,040 INFO L87 Difference]: Start difference. First operand 664 states and 1075 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-12 02:30:40,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:30:40,121 INFO L93 Difference]: Finished difference Result 1557 states and 2509 transitions. [2023-11-12 02:30:40,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:30:40,122 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) Word has length 373 [2023-11-12 02:30:40,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:30:40,131 INFO L225 Difference]: With dead ends: 1557 [2023-11-12 02:30:40,131 INFO L226 Difference]: Without dead ends: 1121 [2023-11-12 02:30:40,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 371 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:30:40,134 INFO L413 NwaCegarLoop]: 598 mSDtfsCounter, 272 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 894 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:30:40,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 894 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:30:40,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1121 states. [2023-11-12 02:30:40,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1121 to 892. [2023-11-12 02:30:40,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 748 states have (on average 1.554812834224599) internal successors, (1163), 749 states have internal predecessors, (1163), 140 states have call successors, (140), 3 states have call predecessors, (140), 3 states have return successors, (140), 139 states have call predecessors, (140), 140 states have call successors, (140) [2023-11-12 02:30:40,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 1443 transitions. [2023-11-12 02:30:40,219 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 1443 transitions. Word has length 373 [2023-11-12 02:30:40,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:30:40,220 INFO L495 AbstractCegarLoop]: Abstraction has 892 states and 1443 transitions. [2023-11-12 02:30:40,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-12 02:30:40,220 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 1443 transitions. [2023-11-12 02:30:40,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2023-11-12 02:30:40,224 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:30:40,224 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:30:40,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 02:30:40,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:30:40,432 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:30:40,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:30:40,433 INFO L85 PathProgramCache]: Analyzing trace with hash -501440366, now seen corresponding path program 1 times [2023-11-12 02:30:40,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:30:40,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829474278] [2023-11-12 02:30:40,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:40,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:30:40,511 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:30:40,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [173770405] [2023-11-12 02:30:40,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:40,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:30:40,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:30:40,513 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:30:40,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:30:40,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:30:40,845 INFO L262 TraceCheckSpWp]: Trace formula consists of 904 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-12 02:30:40,877 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:30:41,434 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6160 trivial. 0 not checked. [2023-11-12 02:30:41,435 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:30:41,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:30:41,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829474278] [2023-11-12 02:30:41,435 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:30:41,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173770405] [2023-11-12 02:30:41,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173770405] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:30:41,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:30:41,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 02:30:41,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065580871] [2023-11-12 02:30:41,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:30:41,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:30:41,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:30:41,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:30:41,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:30:41,439 INFO L87 Difference]: Start difference. First operand 892 states and 1443 transitions. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-12 02:30:42,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:30:42,282 INFO L93 Difference]: Finished difference Result 3115 states and 5014 transitions. [2023-11-12 02:30:42,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 02:30:42,283 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) Word has length 373 [2023-11-12 02:30:42,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:30:42,299 INFO L225 Difference]: With dead ends: 3115 [2023-11-12 02:30:42,299 INFO L226 Difference]: Without dead ends: 2440 [2023-11-12 02:30:42,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 369 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:30:42,303 INFO L413 NwaCegarLoop]: 528 mSDtfsCounter, 1202 mSDsluCounter, 1109 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 398 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1202 SdHoareTripleChecker+Valid, 1637 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 398 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-12 02:30:42,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1202 Valid, 1637 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [398 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-12 02:30:42,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2440 states. [2023-11-12 02:30:42,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2440 to 1739. [2023-11-12 02:30:42,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1739 states, 1443 states have (on average 1.5273735273735274) internal successors, (2204), 1447 states have internal predecessors, (2204), 286 states have call successors, (286), 9 states have call predecessors, (286), 9 states have return successors, (286), 282 states have call predecessors, (286), 286 states have call successors, (286) [2023-11-12 02:30:42,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1739 states to 1739 states and 2776 transitions. [2023-11-12 02:30:42,486 INFO L78 Accepts]: Start accepts. Automaton has 1739 states and 2776 transitions. Word has length 373 [2023-11-12 02:30:42,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:30:42,487 INFO L495 AbstractCegarLoop]: Abstraction has 1739 states and 2776 transitions. [2023-11-12 02:30:42,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-12 02:30:42,488 INFO L276 IsEmpty]: Start isEmpty. Operand 1739 states and 2776 transitions. [2023-11-12 02:30:42,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2023-11-12 02:30:42,492 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:30:42,492 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:30:42,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 02:30:42,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-12 02:30:42,701 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:30:42,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:30:42,702 INFO L85 PathProgramCache]: Analyzing trace with hash -253293872, now seen corresponding path program 1 times [2023-11-12 02:30:42,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:30:42,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313487085] [2023-11-12 02:30:42,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:42,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:30:42,761 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:30:42,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [997598458] [2023-11-12 02:30:42,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:42,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:30:42,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:30:42,764 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:30:42,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 02:30:43,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:30:43,095 INFO L262 TraceCheckSpWp]: Trace formula consists of 905 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:30:43,104 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:30:43,178 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6160 trivial. 0 not checked. [2023-11-12 02:30:43,178 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:30:43,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:30:43,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313487085] [2023-11-12 02:30:43,179 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:30:43,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997598458] [2023-11-12 02:30:43,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997598458] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:30:43,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:30:43,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:30:43,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551025747] [2023-11-12 02:30:43,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:30:43,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:30:43,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:30:43,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:30:43,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:30:43,182 INFO L87 Difference]: Start difference. First operand 1739 states and 2776 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-12 02:30:43,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:30:43,360 INFO L93 Difference]: Finished difference Result 3379 states and 5398 transitions. [2023-11-12 02:30:43,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:30:43,361 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) Word has length 373 [2023-11-12 02:30:43,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:30:43,374 INFO L225 Difference]: With dead ends: 3379 [2023-11-12 02:30:43,374 INFO L226 Difference]: Without dead ends: 1742 [2023-11-12 02:30:43,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:30:43,379 INFO L413 NwaCegarLoop]: 305 mSDtfsCounter, 209 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 903 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:30:43,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 903 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:30:43,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1742 states. [2023-11-12 02:30:43,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1742 to 1739. [2023-11-12 02:30:43,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1739 states, 1443 states have (on average 1.5162855162855162) internal successors, (2188), 1447 states have internal predecessors, (2188), 286 states have call successors, (286), 9 states have call predecessors, (286), 9 states have return successors, (286), 282 states have call predecessors, (286), 286 states have call successors, (286) [2023-11-12 02:30:43,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1739 states to 1739 states and 2760 transitions. [2023-11-12 02:30:43,521 INFO L78 Accepts]: Start accepts. Automaton has 1739 states and 2760 transitions. Word has length 373 [2023-11-12 02:30:43,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:30:43,522 INFO L495 AbstractCegarLoop]: Abstraction has 1739 states and 2760 transitions. [2023-11-12 02:30:43,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-12 02:30:43,522 INFO L276 IsEmpty]: Start isEmpty. Operand 1739 states and 2760 transitions. [2023-11-12 02:30:43,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2023-11-12 02:30:43,526 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:30:43,527 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:30:43,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 02:30:43,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:30:43,735 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:30:43,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:30:43,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1274362226, now seen corresponding path program 1 times [2023-11-12 02:30:43,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:30:43,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476642719] [2023-11-12 02:30:43,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:43,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:30:43,793 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:30:43,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [177953118] [2023-11-12 02:30:43,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:43,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:30:43,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:30:43,795 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:30:43,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 02:30:44,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:30:44,137 INFO L262 TraceCheckSpWp]: Trace formula consists of 904 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-12 02:30:44,148 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:30:44,680 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6160 trivial. 0 not checked. [2023-11-12 02:30:44,681 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:30:44,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:30:44,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476642719] [2023-11-12 02:30:44,681 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:30:44,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177953118] [2023-11-12 02:30:44,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177953118] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:30:44,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:30:44,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 02:30:44,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366767334] [2023-11-12 02:30:44,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:30:44,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:30:44,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:30:44,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:30:44,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:30:44,685 INFO L87 Difference]: Start difference. First operand 1739 states and 2760 transitions. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-12 02:30:46,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:30:46,363 INFO L93 Difference]: Finished difference Result 8899 states and 13926 transitions. [2023-11-12 02:30:46,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 02:30:46,364 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) Word has length 373 [2023-11-12 02:30:46,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:30:46,408 INFO L225 Difference]: With dead ends: 8899 [2023-11-12 02:30:46,408 INFO L226 Difference]: Without dead ends: 7262 [2023-11-12 02:30:46,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2023-11-12 02:30:46,415 INFO L413 NwaCegarLoop]: 1039 mSDtfsCounter, 1352 mSDsluCounter, 1766 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1352 SdHoareTripleChecker+Valid, 2805 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:30:46,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1352 Valid, 2805 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-12 02:30:46,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7262 states. [2023-11-12 02:30:46,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7262 to 3604. [2023-11-12 02:30:46,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3604 states, 3067 states have (on average 1.5119008803390936) internal successors, (4637), 3075 states have internal predecessors, (4637), 516 states have call successors, (516), 20 states have call predecessors, (516), 20 states have return successors, (516), 508 states have call predecessors, (516), 516 states have call successors, (516) [2023-11-12 02:30:46,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3604 states to 3604 states and 5669 transitions. [2023-11-12 02:30:46,791 INFO L78 Accepts]: Start accepts. Automaton has 3604 states and 5669 transitions. Word has length 373 [2023-11-12 02:30:46,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:30:46,792 INFO L495 AbstractCegarLoop]: Abstraction has 3604 states and 5669 transitions. [2023-11-12 02:30:46,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-12 02:30:46,792 INFO L276 IsEmpty]: Start isEmpty. Operand 3604 states and 5669 transitions. [2023-11-12 02:30:46,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2023-11-12 02:30:46,797 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:30:46,798 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:30:46,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 02:30:47,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:30:47,005 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:30:47,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:30:47,006 INFO L85 PathProgramCache]: Analyzing trace with hash 664799820, now seen corresponding path program 1 times [2023-11-12 02:30:47,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:30:47,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724560754] [2023-11-12 02:30:47,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:47,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:30:47,063 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:30:47,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [596602763] [2023-11-12 02:30:47,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:47,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:30:47,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:30:47,065 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:30:47,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 02:30:47,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:30:47,411 INFO L262 TraceCheckSpWp]: Trace formula consists of 903 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:30:47,419 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:30:47,614 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 2715 proven. 51 refuted. 0 times theorem prover too weak. 3394 trivial. 0 not checked. [2023-11-12 02:30:47,614 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:30:47,887 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 114 proven. 51 refuted. 0 times theorem prover too weak. 5995 trivial. 0 not checked. [2023-11-12 02:30:47,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:30:47,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724560754] [2023-11-12 02:30:47,888 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:30:47,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596602763] [2023-11-12 02:30:47,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596602763] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:30:47,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:30:47,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-12 02:30:47,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561201274] [2023-11-12 02:30:47,891 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:30:47,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:30:47,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:30:47,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:30:47,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:30:47,895 INFO L87 Difference]: Start difference. First operand 3604 states and 5669 transitions. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 2 states have call successors, (73), 2 states have call predecessors, (73), 4 states have return successors, (74), 2 states have call predecessors, (74), 2 states have call successors, (74) [2023-11-12 02:30:48,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:30:48,522 INFO L93 Difference]: Finished difference Result 6066 states and 9437 transitions. [2023-11-12 02:30:48,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 02:30:48,523 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 2 states have call successors, (73), 2 states have call predecessors, (73), 4 states have return successors, (74), 2 states have call predecessors, (74), 2 states have call successors, (74) Word has length 373 [2023-11-12 02:30:48,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:30:48,543 INFO L225 Difference]: With dead ends: 6066 [2023-11-12 02:30:48,543 INFO L226 Difference]: Without dead ends: 2564 [2023-11-12 02:30:48,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 748 GetRequests, 738 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:30:48,554 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 213 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 605 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 02:30:48,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 605 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 02:30:48,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2564 states. [2023-11-12 02:30:48,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2564 to 2532. [2023-11-12 02:30:48,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2532 states, 1990 states have (on average 1.4351758793969849) internal successors, (2856), 1998 states have internal predecessors, (2856), 516 states have call successors, (516), 25 states have call predecessors, (516), 25 states have return successors, (516), 508 states have call predecessors, (516), 516 states have call successors, (516) [2023-11-12 02:30:48,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2532 states to 2532 states and 3888 transitions. [2023-11-12 02:30:48,885 INFO L78 Accepts]: Start accepts. Automaton has 2532 states and 3888 transitions. Word has length 373 [2023-11-12 02:30:48,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:30:48,886 INFO L495 AbstractCegarLoop]: Abstraction has 2532 states and 3888 transitions. [2023-11-12 02:30:48,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 2 states have call successors, (73), 2 states have call predecessors, (73), 4 states have return successors, (74), 2 states have call predecessors, (74), 2 states have call successors, (74) [2023-11-12 02:30:48,887 INFO L276 IsEmpty]: Start isEmpty. Operand 2532 states and 3888 transitions. [2023-11-12 02:30:48,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2023-11-12 02:30:48,891 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:30:48,892 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:30:48,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-12 02:30:49,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:30:49,101 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:30:49,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:30:49,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1813648357, now seen corresponding path program 1 times [2023-11-12 02:30:49,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:30:49,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413097292] [2023-11-12 02:30:49,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:49,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:30:49,163 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:30:49,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1778543941] [2023-11-12 02:30:49,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:49,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:30:49,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:30:49,165 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:30:49,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-12 02:30:49,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:30:49,541 INFO L262 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:30:49,551 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:30:49,939 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 2673 proven. 114 refuted. 0 times theorem prover too weak. 3373 trivial. 0 not checked. [2023-11-12 02:30:49,939 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:30:50,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 51 proven. 114 refuted. 0 times theorem prover too weak. 5995 trivial. 0 not checked. [2023-11-12 02:30:50,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:30:50,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413097292] [2023-11-12 02:30:50,256 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:30:50,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778543941] [2023-11-12 02:30:50,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778543941] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:30:50,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:30:50,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-12 02:30:50,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561977517] [2023-11-12 02:30:50,258 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:30:50,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 02:30:50,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:30:50,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:30:50,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:30:50,261 INFO L87 Difference]: Start difference. First operand 2532 states and 3888 transitions. Second operand has 8 states, 8 states have (on average 17.25) internal successors, (138), 8 states have internal predecessors, (138), 3 states have call successors, (94), 2 states have call predecessors, (94), 4 states have return successors, (95), 3 states have call predecessors, (95), 3 states have call successors, (95) [2023-11-12 02:30:50,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:30:50,951 INFO L93 Difference]: Finished difference Result 3978 states and 6038 transitions. [2023-11-12 02:30:50,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 02:30:50,952 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 17.25) internal successors, (138), 8 states have internal predecessors, (138), 3 states have call successors, (94), 2 states have call predecessors, (94), 4 states have return successors, (95), 3 states have call predecessors, (95), 3 states have call successors, (95) Word has length 374 [2023-11-12 02:30:50,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:30:50,968 INFO L225 Difference]: With dead ends: 3978 [2023-11-12 02:30:50,969 INFO L226 Difference]: Without dead ends: 1552 [2023-11-12 02:30:50,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 750 GetRequests, 740 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:30:50,978 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 174 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 02:30:50,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 584 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 02:30:50,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1552 states. [2023-11-12 02:30:51,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1552 to 1520. [2023-11-12 02:30:51,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1520 states, 1139 states have (on average 1.3810359964881476) internal successors, (1573), 1141 states have internal predecessors, (1573), 348 states have call successors, (348), 32 states have call predecessors, (348), 32 states have return successors, (348), 346 states have call predecessors, (348), 348 states have call successors, (348) [2023-11-12 02:30:51,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1520 states to 1520 states and 2269 transitions. [2023-11-12 02:30:51,151 INFO L78 Accepts]: Start accepts. Automaton has 1520 states and 2269 transitions. Word has length 374 [2023-11-12 02:30:51,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:30:51,152 INFO L495 AbstractCegarLoop]: Abstraction has 1520 states and 2269 transitions. [2023-11-12 02:30:51,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.25) internal successors, (138), 8 states have internal predecessors, (138), 3 states have call successors, (94), 2 states have call predecessors, (94), 4 states have return successors, (95), 3 states have call predecessors, (95), 3 states have call successors, (95) [2023-11-12 02:30:51,153 INFO L276 IsEmpty]: Start isEmpty. Operand 1520 states and 2269 transitions. [2023-11-12 02:30:51,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2023-11-12 02:30:51,156 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:30:51,157 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:30:51,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-12 02:30:51,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-12 02:30:51,369 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:30:51,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:30:51,370 INFO L85 PathProgramCache]: Analyzing trace with hash 756967948, now seen corresponding path program 1 times [2023-11-12 02:30:51,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:30:51,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273469848] [2023-11-12 02:30:51,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:51,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:30:51,434 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:30:51,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [734905532] [2023-11-12 02:30:51,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:51,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:30:51,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:30:51,437 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:30:51,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-12 02:30:51,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:30:51,878 INFO L262 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 02:30:51,886 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:30:53,017 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 3115 proven. 75 refuted. 0 times theorem prover too weak. 2970 trivial. 0 not checked. [2023-11-12 02:30:53,017 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:30:53,512 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 90 proven. 75 refuted. 0 times theorem prover too weak. 5995 trivial. 0 not checked. [2023-11-12 02:30:53,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:30:53,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273469848] [2023-11-12 02:30:53,512 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:30:53,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734905532] [2023-11-12 02:30:53,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734905532] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:30:53,513 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:30:53,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2023-11-12 02:30:53,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961346961] [2023-11-12 02:30:53,513 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:30:53,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 02:30:53,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:30:53,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 02:30:53,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:30:53,516 INFO L87 Difference]: Start difference. First operand 1520 states and 2269 transitions. Second operand has 12 states, 12 states have (on average 15.916666666666666) internal successors, (191), 12 states have internal predecessors, (191), 4 states have call successors, (112), 3 states have call predecessors, (112), 5 states have return successors, (112), 4 states have call predecessors, (112), 4 states have call successors, (112) [2023-11-12 02:30:55,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:30:55,127 INFO L93 Difference]: Finished difference Result 5495 states and 8185 transitions. [2023-11-12 02:30:55,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-12 02:30:55,128 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 15.916666666666666) internal successors, (191), 12 states have internal predecessors, (191), 4 states have call successors, (112), 3 states have call predecessors, (112), 5 states have return successors, (112), 4 states have call predecessors, (112), 4 states have call successors, (112) Word has length 374 [2023-11-12 02:30:55,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:30:55,167 INFO L225 Difference]: With dead ends: 5495 [2023-11-12 02:30:55,168 INFO L226 Difference]: Without dead ends: 4085 [2023-11-12 02:30:55,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 752 GetRequests, 736 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2023-11-12 02:30:55,176 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 773 mSDsluCounter, 1348 mSDsCounter, 0 mSdLazyCounter, 1005 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 858 SdHoareTripleChecker+Valid, 1581 SdHoareTripleChecker+Invalid, 1219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 1005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:30:55,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [858 Valid, 1581 Invalid, 1219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 1005 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-12 02:30:55,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4085 states. [2023-11-12 02:30:55,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4085 to 2954. [2023-11-12 02:30:55,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2954 states, 2246 states have (on average 1.3802315227070348) internal successors, (3100), 2250 states have internal predecessors, (3100), 640 states have call successors, (640), 67 states have call predecessors, (640), 67 states have return successors, (640), 636 states have call predecessors, (640), 640 states have call successors, (640) [2023-11-12 02:30:55,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2954 states to 2954 states and 4380 transitions. [2023-11-12 02:30:55,584 INFO L78 Accepts]: Start accepts. Automaton has 2954 states and 4380 transitions. Word has length 374 [2023-11-12 02:30:55,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:30:55,585 INFO L495 AbstractCegarLoop]: Abstraction has 2954 states and 4380 transitions. [2023-11-12 02:30:55,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 15.916666666666666) internal successors, (191), 12 states have internal predecessors, (191), 4 states have call successors, (112), 3 states have call predecessors, (112), 5 states have return successors, (112), 4 states have call predecessors, (112), 4 states have call successors, (112) [2023-11-12 02:30:55,586 INFO L276 IsEmpty]: Start isEmpty. Operand 2954 states and 4380 transitions. [2023-11-12 02:30:55,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2023-11-12 02:30:55,590 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:30:55,590 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:30:55,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-12 02:30:55,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-12 02:30:55,798 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:30:55,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:30:55,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1195667519, now seen corresponding path program 1 times [2023-11-12 02:30:55,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:30:55,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075497785] [2023-11-12 02:30:55,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:55,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:30:55,872 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:30:55,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1982130966] [2023-11-12 02:30:55,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:55,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:30:55,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:30:55,874 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:30:55,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-12 02:30:56,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:30:56,282 INFO L262 TraceCheckSpWp]: Trace formula consists of 909 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:30:56,289 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:30:56,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 2013 proven. 132 refuted. 0 times theorem prover too weak. 4015 trivial. 0 not checked. [2023-11-12 02:30:56,790 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:30:57,169 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 33 proven. 132 refuted. 0 times theorem prover too weak. 5995 trivial. 0 not checked. [2023-11-12 02:30:57,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:30:57,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075497785] [2023-11-12 02:30:57,170 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:30:57,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982130966] [2023-11-12 02:30:57,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982130966] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:30:57,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:30:57,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-12 02:30:57,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739476446] [2023-11-12 02:30:57,171 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:30:57,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 02:30:57,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:30:57,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:30:57,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:30:57,175 INFO L87 Difference]: Start difference. First operand 2954 states and 4380 transitions. Second operand has 8 states, 8 states have (on average 19.375) internal successors, (155), 8 states have internal predecessors, (155), 3 states have call successors, (100), 2 states have call predecessors, (100), 4 states have return successors, (101), 3 states have call predecessors, (101), 3 states have call successors, (101) [2023-11-12 02:30:57,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:30:57,929 INFO L93 Difference]: Finished difference Result 5906 states and 8694 transitions. [2023-11-12 02:30:57,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 02:30:57,930 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 19.375) internal successors, (155), 8 states have internal predecessors, (155), 3 states have call successors, (100), 2 states have call predecessors, (100), 4 states have return successors, (101), 3 states have call predecessors, (101), 3 states have call successors, (101) Word has length 376 [2023-11-12 02:30:57,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:30:57,953 INFO L225 Difference]: With dead ends: 5906 [2023-11-12 02:30:57,954 INFO L226 Difference]: Without dead ends: 3066 [2023-11-12 02:30:57,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 754 GetRequests, 744 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:30:57,962 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 286 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 02:30:57,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 597 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 02:30:57,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3066 states. [2023-11-12 02:30:58,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3066 to 3006. [2023-11-12 02:30:58,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3006 states, 2285 states have (on average 1.3527352297592998) internal successors, (3091), 2289 states have internal predecessors, (3091), 640 states have call successors, (640), 80 states have call predecessors, (640), 80 states have return successors, (640), 636 states have call predecessors, (640), 640 states have call successors, (640) [2023-11-12 02:30:58,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3006 states to 3006 states and 4371 transitions. [2023-11-12 02:30:58,379 INFO L78 Accepts]: Start accepts. Automaton has 3006 states and 4371 transitions. Word has length 376 [2023-11-12 02:30:58,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:30:58,381 INFO L495 AbstractCegarLoop]: Abstraction has 3006 states and 4371 transitions. [2023-11-12 02:30:58,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.375) internal successors, (155), 8 states have internal predecessors, (155), 3 states have call successors, (100), 2 states have call predecessors, (100), 4 states have return successors, (101), 3 states have call predecessors, (101), 3 states have call successors, (101) [2023-11-12 02:30:58,381 INFO L276 IsEmpty]: Start isEmpty. Operand 3006 states and 4371 transitions. [2023-11-12 02:30:58,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2023-11-12 02:30:58,387 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:30:58,387 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:30:58,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-12 02:30:58,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-12 02:30:58,596 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:30:58,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:30:58,597 INFO L85 PathProgramCache]: Analyzing trace with hash 2069940479, now seen corresponding path program 1 times [2023-11-12 02:30:58,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:30:58,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39882988] [2023-11-12 02:30:58,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:58,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:30:58,668 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:30:58,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [631426318] [2023-11-12 02:30:58,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:30:58,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:30:58,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:30:58,671 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:30:58,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-12 02:30:59,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:30:59,092 INFO L262 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-12 02:30:59,102 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:30:59,583 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6160 trivial. 0 not checked. [2023-11-12 02:30:59,584 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:30:59,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:30:59,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39882988] [2023-11-12 02:30:59,584 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:30:59,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631426318] [2023-11-12 02:30:59,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631426318] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:30:59,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:30:59,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 02:30:59,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864816741] [2023-11-12 02:30:59,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:30:59,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:30:59,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:30:59,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:30:59,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:30:59,588 INFO L87 Difference]: Start difference. First operand 3006 states and 4371 transitions. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-12 02:31:00,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:31:00,617 INFO L93 Difference]: Finished difference Result 7762 states and 11288 transitions. [2023-11-12 02:31:00,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 02:31:00,618 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) Word has length 376 [2023-11-12 02:31:00,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:31:00,658 INFO L225 Difference]: With dead ends: 7762 [2023-11-12 02:31:00,658 INFO L226 Difference]: Without dead ends: 4874 [2023-11-12 02:31:00,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 372 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:31:00,666 INFO L413 NwaCegarLoop]: 487 mSDtfsCounter, 1364 mSDsluCounter, 1430 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1364 SdHoareTripleChecker+Valid, 1917 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 02:31:00,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1364 Valid, 1917 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 02:31:00,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4874 states. [2023-11-12 02:31:01,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4874 to 4444. [2023-11-12 02:31:01,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4444 states, 3394 states have (on average 1.357100766057749) internal successors, (4606), 3400 states have internal predecessors, (4606), 932 states have call successors, (932), 117 states have call predecessors, (932), 117 states have return successors, (932), 926 states have call predecessors, (932), 932 states have call successors, (932) [2023-11-12 02:31:01,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4444 states to 4444 states and 6470 transitions. [2023-11-12 02:31:01,299 INFO L78 Accepts]: Start accepts. Automaton has 4444 states and 6470 transitions. Word has length 376 [2023-11-12 02:31:01,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:31:01,300 INFO L495 AbstractCegarLoop]: Abstraction has 4444 states and 6470 transitions. [2023-11-12 02:31:01,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2023-11-12 02:31:01,301 INFO L276 IsEmpty]: Start isEmpty. Operand 4444 states and 6470 transitions. [2023-11-12 02:31:01,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2023-11-12 02:31:01,305 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:31:01,305 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:31:01,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-12 02:31:01,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-12 02:31:01,513 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:31:01,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:31:01,514 INFO L85 PathProgramCache]: Analyzing trace with hash -392514367, now seen corresponding path program 1 times [2023-11-12 02:31:01,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:31:01,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728263298] [2023-11-12 02:31:01,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:31:01,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:31:01,599 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:31:01,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2033876675] [2023-11-12 02:31:01,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:31:01,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:31:01,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:31:01,625 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:31:01,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-12 02:31:02,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:02,090 INFO L262 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-12 02:31:02,099 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:31:03,195 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 2156 proven. 60 refuted. 0 times theorem prover too weak. 3944 trivial. 0 not checked. [2023-11-12 02:31:03,195 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:31:04,440 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 264 proven. 63 refuted. 0 times theorem prover too weak. 5833 trivial. 0 not checked. [2023-11-12 02:31:04,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:31:04,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728263298] [2023-11-12 02:31:04,441 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:31:04,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033876675] [2023-11-12 02:31:04,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033876675] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:31:04,441 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:31:04,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2023-11-12 02:31:04,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154476063] [2023-11-12 02:31:04,442 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:31:04,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-12 02:31:04,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:31:04,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-12 02:31:04,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2023-11-12 02:31:04,446 INFO L87 Difference]: Start difference. First operand 4444 states and 6470 transitions. Second operand has 24 states, 23 states have (on average 7.0) internal successors, (161), 22 states have internal predecessors, (161), 7 states have call successors, (112), 5 states have call predecessors, (112), 8 states have return successors, (112), 7 states have call predecessors, (112), 7 states have call successors, (112) [2023-11-12 02:31:09,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:31:09,720 INFO L93 Difference]: Finished difference Result 17253 states and 25008 transitions. [2023-11-12 02:31:09,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-12 02:31:09,721 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 7.0) internal successors, (161), 22 states have internal predecessors, (161), 7 states have call successors, (112), 5 states have call predecessors, (112), 8 states have return successors, (112), 7 states have call predecessors, (112), 7 states have call successors, (112) Word has length 376 [2023-11-12 02:31:09,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:31:09,768 INFO L225 Difference]: With dead ends: 17253 [2023-11-12 02:31:09,768 INFO L226 Difference]: Without dead ends: 12927 [2023-11-12 02:31:09,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 794 GetRequests, 733 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 974 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=961, Invalid=2699, Unknown=0, NotChecked=0, Total=3660 [2023-11-12 02:31:09,783 INFO L413 NwaCegarLoop]: 327 mSDtfsCounter, 1851 mSDsluCounter, 1848 mSDsCounter, 0 mSdLazyCounter, 2347 mSolverCounterSat, 675 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1852 SdHoareTripleChecker+Valid, 2175 SdHoareTripleChecker+Invalid, 3022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 675 IncrementalHoareTripleChecker+Valid, 2347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-11-12 02:31:09,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1852 Valid, 2175 Invalid, 3022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [675 Valid, 2347 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-11-12 02:31:09,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12927 states. [2023-11-12 02:31:11,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12927 to 9032. [2023-11-12 02:31:11,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9032 states, 6956 states have (on average 1.3484761357101782) internal successors, (9380), 6968 states have internal predecessors, (9380), 1808 states have call successors, (1808), 267 states have call predecessors, (1808), 267 states have return successors, (1808), 1796 states have call predecessors, (1808), 1808 states have call successors, (1808) [2023-11-12 02:31:11,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9032 states to 9032 states and 12996 transitions. [2023-11-12 02:31:11,459 INFO L78 Accepts]: Start accepts. Automaton has 9032 states and 12996 transitions. Word has length 376 [2023-11-12 02:31:11,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:31:11,460 INFO L495 AbstractCegarLoop]: Abstraction has 9032 states and 12996 transitions. [2023-11-12 02:31:11,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 7.0) internal successors, (161), 22 states have internal predecessors, (161), 7 states have call successors, (112), 5 states have call predecessors, (112), 8 states have return successors, (112), 7 states have call predecessors, (112), 7 states have call successors, (112) [2023-11-12 02:31:11,461 INFO L276 IsEmpty]: Start isEmpty. Operand 9032 states and 12996 transitions. [2023-11-12 02:31:11,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2023-11-12 02:31:11,465 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:31:11,466 INFO L195 NwaCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:31:11,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-12 02:31:11,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-12 02:31:11,675 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:31:11,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:31:11,675 INFO L85 PathProgramCache]: Analyzing trace with hash -251965757, now seen corresponding path program 1 times [2023-11-12 02:31:11,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:31:11,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227880308] [2023-11-12 02:31:11,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:31:11,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:31:11,736 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:31:11,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [971928556] [2023-11-12 02:31:11,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:31:11,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:31:11,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:31:11,738 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:31:11,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bcb9da-1960-48f9-9129-1c2c6f81e77e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-12 02:31:12,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:31:12,143 INFO L262 TraceCheckSpWp]: Trace formula consists of 905 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:31:12,151 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:31:12,638 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6160 trivial. 0 not checked. [2023-11-12 02:31:12,638 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:31:12,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:31:12,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227880308] [2023-11-12 02:31:12,638 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:31:12,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971928556] [2023-11-12 02:31:12,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971928556] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:31:12,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:31:12,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:31:12,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417649164] [2023-11-12 02:31:12,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:31:12,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:31:12,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:31:12,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:31:12,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:31:12,645 INFO L87 Difference]: Start difference. First operand 9032 states and 12996 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (56), 1 states have call predecessors, (56), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56)