./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_50-1loop_file-28.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_52c8aedc-69c5-4c09-aa8c-849e4902abc0/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c8aedc-69c5-4c09-aa8c-849e4902abc0/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_52c8aedc-69c5-4c09-aa8c-849e4902abc0/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c8aedc-69c5-4c09-aa8c-849e4902abc0/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_50-1loop_file-28.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c8aedc-69c5-4c09-aa8c-849e4902abc0/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_52c8aedc-69c5-4c09-aa8c-849e4902abc0/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 eb9514c110f30441b6230f99cfb64804f1f8af1bad5cb610cf0e2a87b7fd20e1 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:06:35,423 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:06:35,552 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c8aedc-69c5-4c09-aa8c-849e4902abc0/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:06:35,565 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:06:35,565 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:06:35,608 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:06:35,609 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:06:35,610 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:06:35,611 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:06:35,616 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:06:35,617 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:06:35,617 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:06:35,618 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:06:35,620 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:06:35,620 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:06:35,621 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:06:35,621 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:06:35,622 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:06:35,622 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:06:35,623 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:06:35,623 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:06:35,624 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:06:35,625 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:06:35,625 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:06:35,625 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:06:35,626 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:06:35,627 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:06:35,627 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:06:35,628 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:06:35,628 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:06:35,630 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:06:35,630 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:06:35,630 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:06:35,631 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:06:35,631 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:06:35,631 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:06:35,631 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:06:35,632 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:06:35,632 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:06:35,632 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_52c8aedc-69c5-4c09-aa8c-849e4902abc0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c8aedc-69c5-4c09-aa8c-849e4902abc0/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eb9514c110f30441b6230f99cfb64804f1f8af1bad5cb610cf0e2a87b7fd20e1 [2023-11-12 02:06:35,924 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:06:35,976 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:06:35,978 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:06:35,980 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:06:35,981 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:06:35,982 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c8aedc-69c5-4c09-aa8c-849e4902abc0/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_50-1loop_file-28.i [2023-11-12 02:06:39,064 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:06:39,345 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:06:39,346 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c8aedc-69c5-4c09-aa8c-849e4902abc0/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_50-1loop_file-28.i [2023-11-12 02:06:39,355 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c8aedc-69c5-4c09-aa8c-849e4902abc0/bin/uautomizer-verify-uTZkv6EMXl/data/54f5ac5d4/6415e9c14e1b405fbfa2b506dacbdf44/FLAGcad6a534b [2023-11-12 02:06:39,636 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c8aedc-69c5-4c09-aa8c-849e4902abc0/bin/uautomizer-verify-uTZkv6EMXl/data/54f5ac5d4/6415e9c14e1b405fbfa2b506dacbdf44 [2023-11-12 02:06:39,638 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:06:39,640 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:06:39,641 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:06:39,642 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:06:39,651 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:06:39,652 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:06:39" (1/1) ... [2023-11-12 02:06:39,653 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59ca96cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:06:39, skipping insertion in model container [2023-11-12 02:06:39,653 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:06:39" (1/1) ... [2023-11-12 02:06:39,687 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:06:39,836 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_52c8aedc-69c5-4c09-aa8c-849e4902abc0/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_50-1loop_file-28.i[915,928] [2023-11-12 02:06:39,945 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:06:39,955 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:06:39,967 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_52c8aedc-69c5-4c09-aa8c-849e4902abc0/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_50-1loop_file-28.i[915,928] [2023-11-12 02:06:40,004 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:06:40,022 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:06:40,023 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:06:40 WrapperNode [2023-11-12 02:06:40,023 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:06:40,025 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:06:40,025 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:06:40,025 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:06:40,033 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:06:40" (1/1) ... [2023-11-12 02:06:40,056 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:06:40" (1/1) ... [2023-11-12 02:06:40,124 INFO L138 Inliner]: procedures = 26, calls = 35, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 171 [2023-11-12 02:06:40,124 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:06:40,125 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:06:40,125 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:06:40,126 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:06:40,135 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:06:40" (1/1) ... [2023-11-12 02:06:40,136 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:06:40" (1/1) ... [2023-11-12 02:06:40,140 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:06:40" (1/1) ... [2023-11-12 02:06:40,141 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:06:40" (1/1) ... [2023-11-12 02:06:40,166 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:06:40" (1/1) ... [2023-11-12 02:06:40,170 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:06:40" (1/1) ... [2023-11-12 02:06:40,173 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:06:40" (1/1) ... [2023-11-12 02:06:40,177 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:06:40" (1/1) ... [2023-11-12 02:06:40,182 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:06:40,183 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:06:40,183 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:06:40,184 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:06:40,185 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:06:40" (1/1) ... [2023-11-12 02:06:40,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:06:40,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c8aedc-69c5-4c09-aa8c-849e4902abc0/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:06:40,222 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c8aedc-69c5-4c09-aa8c-849e4902abc0/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:06:40,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c8aedc-69c5-4c09-aa8c-849e4902abc0/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:06:40,266 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:06:40,266 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 02:06:40,266 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 02:06:40,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:06:40,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:06:40,267 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:06:40,403 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:06:40,405 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:06:40,899 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:06:40,909 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:06:40,915 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 02:06:40,918 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:06:40 BoogieIcfgContainer [2023-11-12 02:06:40,918 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:06:40,923 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:06:40,926 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:06:40,930 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:06:40,930 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:06:39" (1/3) ... [2023-11-12 02:06:40,931 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e253ab8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:06:40, skipping insertion in model container [2023-11-12 02:06:40,932 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:06:40" (2/3) ... [2023-11-12 02:06:40,932 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e253ab8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:06:40, skipping insertion in model container [2023-11-12 02:06:40,932 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:06:40" (3/3) ... [2023-11-12 02:06:40,934 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_loopvsstraightlinecode_50-1loop_file-28.i [2023-11-12 02:06:40,956 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:06:40,957 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:06:41,028 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:06:41,036 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;@4371ff6b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:06:41,037 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 02:06:41,043 INFO L276 IsEmpty]: Start isEmpty. Operand has 76 states, 51 states have (on average 1.3725490196078431) internal successors, (70), 52 states have internal predecessors, (70), 22 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-11-12 02:06:41,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-11-12 02:06:41,064 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:06:41,065 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:06:41,066 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:06:41,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:06:41,074 INFO L85 PathProgramCache]: Analyzing trace with hash -888934187, now seen corresponding path program 1 times [2023-11-12 02:06:41,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:06:41,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759318200] [2023-11-12 02:06:41,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:06:41,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:06:41,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:06:41,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:06:41,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759318200] [2023-11-12 02:06:41,406 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-12 02:06:41,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983607493] [2023-11-12 02:06:41,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:06:41,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:06:41,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c8aedc-69c5-4c09-aa8c-849e4902abc0/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:06:41,411 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c8aedc-69c5-4c09-aa8c-849e4902abc0/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:06:41,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c8aedc-69c5-4c09-aa8c-849e4902abc0/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:06:41,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:06:41,671 INFO L262 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-12 02:06:41,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:06:41,741 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 882 trivial. 0 not checked. [2023-11-12 02:06:41,741 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:06:41,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983607493] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:06:41,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:06:41,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:06:41,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58193957] [2023-11-12 02:06:41,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:06:41,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 02:06:41,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:06:41,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 02:06:41,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:06:41,791 INFO L87 Difference]: Start difference. First operand has 76 states, 51 states have (on average 1.3725490196078431) internal successors, (70), 52 states have internal predecessors, (70), 22 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Second operand has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 2 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 2 states have call successors, (22) [2023-11-12 02:06:41,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:06:41,827 INFO L93 Difference]: Finished difference Result 149 states and 247 transitions. [2023-11-12 02:06:41,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 02:06:41,829 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 2 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 2 states have call successors, (22) Word has length 146 [2023-11-12 02:06:41,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:06:41,837 INFO L225 Difference]: With dead ends: 149 [2023-11-12 02:06:41,838 INFO L226 Difference]: Without dead ends: 72 [2023-11-12 02:06:41,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:06:41,846 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:06:41,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:06:41,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-11-12 02:06:41,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2023-11-12 02:06:41,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 48 states have (on average 1.3125) internal successors, (63), 48 states have internal predecessors, (63), 22 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-11-12 02:06:41,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 107 transitions. [2023-11-12 02:06:41,904 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 107 transitions. Word has length 146 [2023-11-12 02:06:41,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:06:41,904 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 107 transitions. [2023-11-12 02:06:41,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 2 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 2 states have call successors, (22) [2023-11-12 02:06:41,905 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 107 transitions. [2023-11-12 02:06:41,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-11-12 02:06:41,909 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:06:41,910 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:06:41,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c8aedc-69c5-4c09-aa8c-849e4902abc0/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:06:42,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c8aedc-69c5-4c09-aa8c-849e4902abc0/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:06:42,116 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:06:42,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:06:42,117 INFO L85 PathProgramCache]: Analyzing trace with hash -42396275, now seen corresponding path program 1 times [2023-11-12 02:06:42,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:06:42,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091091159] [2023-11-12 02:06:42,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:06:42,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:06:42,237 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:06:42,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [602224529] [2023-11-12 02:06:42,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:06:42,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:06:42,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c8aedc-69c5-4c09-aa8c-849e4902abc0/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:06:42,251 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c8aedc-69c5-4c09-aa8c-849e4902abc0/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:06:42,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c8aedc-69c5-4c09-aa8c-849e4902abc0/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:06:42,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:06:42,463 INFO L262 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 02:06:42,485 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:06:42,882 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2023-11-12 02:06:42,882 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:06:42,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:06:42,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091091159] [2023-11-12 02:06:42,887 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:06:42,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602224529] [2023-11-12 02:06:42,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602224529] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:06:42,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:06:42,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:06:42,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661754791] [2023-11-12 02:06:42,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:06:42,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:06:42,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:06:42,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:06:42,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:06:42,896 INFO L87 Difference]: Start difference. First operand 72 states and 107 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 4 states have internal predecessors, (39), 1 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) [2023-11-12 02:06:43,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:06:43,303 INFO L93 Difference]: Finished difference Result 316 states and 474 transitions. [2023-11-12 02:06:43,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:06:43,304 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 4 states have internal predecessors, (39), 1 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) Word has length 146 [2023-11-12 02:06:43,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:06:43,316 INFO L225 Difference]: With dead ends: 316 [2023-11-12 02:06:43,317 INFO L226 Difference]: Without dead ends: 247 [2023-11-12 02:06:43,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:06:43,323 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 307 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:06:43,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 388 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 02:06:43,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2023-11-12 02:06:43,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 143. [2023-11-12 02:06:43,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 96 states have (on average 1.3125) internal successors, (126), 96 states have internal predecessors, (126), 44 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2023-11-12 02:06:43,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 214 transitions. [2023-11-12 02:06:43,407 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 214 transitions. Word has length 146 [2023-11-12 02:06:43,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:06:43,410 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 214 transitions. [2023-11-12 02:06:43,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 4 states have internal predecessors, (39), 1 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) [2023-11-12 02:06:43,411 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 214 transitions. [2023-11-12 02:06:43,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-11-12 02:06:43,422 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:06:43,423 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:06:43,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c8aedc-69c5-4c09-aa8c-849e4902abc0/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:06:43,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c8aedc-69c5-4c09-aa8c-849e4902abc0/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:06:43,630 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:06:43,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:06:43,631 INFO L85 PathProgramCache]: Analyzing trace with hash -851742901, now seen corresponding path program 1 times [2023-11-12 02:06:43,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:06:43,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568269007] [2023-11-12 02:06:43,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:06:43,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:06:43,680 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:06:43,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1577396018] [2023-11-12 02:06:43,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:06:43,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:06:43,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c8aedc-69c5-4c09-aa8c-849e4902abc0/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:06:43,683 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c8aedc-69c5-4c09-aa8c-849e4902abc0/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:06:43,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c8aedc-69c5-4c09-aa8c-849e4902abc0/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:06:43,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:06:43,898 INFO L262 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-12 02:06:43,907 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:06:57,972 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2023-11-12 02:06:57,973 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:06:57,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:06:57,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568269007] [2023-11-12 02:06:57,974 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:06:57,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577396018] [2023-11-12 02:06:57,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577396018] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:06:57,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:06:57,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-12 02:06:57,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421978680] [2023-11-12 02:06:57,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:06:57,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 02:06:57,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:06:57,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 02:06:57,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:06:57,978 INFO L87 Difference]: Start difference. First operand 143 states and 214 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 1 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) [2023-11-12 02:07:00,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:07:00,009 INFO L93 Difference]: Finished difference Result 398 states and 582 transitions. [2023-11-12 02:07:00,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-12 02:07:00,012 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 1 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) Word has length 146 [2023-11-12 02:07:00,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:07:00,015 INFO L225 Difference]: With dead ends: 398 [2023-11-12 02:07:00,018 INFO L226 Difference]: Without dead ends: 258 [2023-11-12 02:07:00,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2023-11-12 02:07:00,023 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 448 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-12 02:07:00,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [448 Valid, 593 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-12 02:07:00,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2023-11-12 02:07:00,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 174. [2023-11-12 02:07:00,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 118 states have (on average 1.2966101694915255) internal successors, (153), 119 states have internal predecessors, (153), 52 states have call successors, (52), 3 states have call predecessors, (52), 3 states have return successors, (52), 51 states have call predecessors, (52), 52 states have call successors, (52) [2023-11-12 02:07:00,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 257 transitions. [2023-11-12 02:07:00,088 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 257 transitions. Word has length 146 [2023-11-12 02:07:00,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:07:00,089 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 257 transitions. [2023-11-12 02:07:00,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 1 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) [2023-11-12 02:07:00,090 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 257 transitions. [2023-11-12 02:07:00,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-11-12 02:07:00,095 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:07:00,096 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:07:00,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c8aedc-69c5-4c09-aa8c-849e4902abc0/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:07:00,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c8aedc-69c5-4c09-aa8c-849e4902abc0/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-12 02:07:00,304 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:07:00,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:07:00,304 INFO L85 PathProgramCache]: Analyzing trace with hash 350630735, now seen corresponding path program 1 times [2023-11-12 02:07:00,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:07:00,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614843344] [2023-11-12 02:07:00,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:07:00,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:07:00,352 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:07:00,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [181999786] [2023-11-12 02:07:00,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:07:00,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:07:00,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c8aedc-69c5-4c09-aa8c-849e4902abc0/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:07:00,354 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c8aedc-69c5-4c09-aa8c-849e4902abc0/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:07:00,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c8aedc-69c5-4c09-aa8c-849e4902abc0/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:07:00,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:07:00,533 INFO L262 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-12 02:07:00,539 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:07:12,053 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2023-11-12 02:07:12,054 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:07:12,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:07:12,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614843344] [2023-11-12 02:07:12,054 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:07:12,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181999786] [2023-11-12 02:07:12,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181999786] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:07:12,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:07:12,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-12 02:07:12,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148992779] [2023-11-12 02:07:12,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:07:12,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 02:07:12,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:07:12,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 02:07:12,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:07:12,058 INFO L87 Difference]: Start difference. First operand 174 states and 257 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 1 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) [2023-11-12 02:07:13,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:07:13,964 INFO L93 Difference]: Finished difference Result 416 states and 600 transitions. [2023-11-12 02:07:13,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-12 02:07:13,967 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 1 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) Word has length 146 [2023-11-12 02:07:13,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:07:13,971 INFO L225 Difference]: With dead ends: 416 [2023-11-12 02:07:13,971 INFO L226 Difference]: Without dead ends: 258 [2023-11-12 02:07:13,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2023-11-12 02:07:13,974 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 319 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-12 02:07:13,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [319 Valid, 628 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-12 02:07:13,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2023-11-12 02:07:13,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 179. [2023-11-12 02:07:13,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 123 states have (on average 1.3008130081300813) internal successors, (160), 124 states have internal predecessors, (160), 52 states have call successors, (52), 3 states have call predecessors, (52), 3 states have return successors, (52), 51 states have call predecessors, (52), 52 states have call successors, (52) [2023-11-12 02:07:14,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 264 transitions. [2023-11-12 02:07:14,001 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 264 transitions. Word has length 146 [2023-11-12 02:07:14,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:07:14,002 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 264 transitions. [2023-11-12 02:07:14,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 1 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) [2023-11-12 02:07:14,002 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 264 transitions. [2023-11-12 02:07:14,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-11-12 02:07:14,004 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:07:14,005 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:07:14,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c8aedc-69c5-4c09-aa8c-849e4902abc0/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:07:14,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c8aedc-69c5-4c09-aa8c-849e4902abc0/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:07:14,212 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:07:14,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:07:14,213 INFO L85 PathProgramCache]: Analyzing trace with hash 159374349, now seen corresponding path program 1 times [2023-11-12 02:07:14,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:07:14,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729620064] [2023-11-12 02:07:14,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:07:14,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:07:14,292 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:07:14,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [505634280] [2023-11-12 02:07:14,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:07:14,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:07:14,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c8aedc-69c5-4c09-aa8c-849e4902abc0/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:07:14,301 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c8aedc-69c5-4c09-aa8c-849e4902abc0/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:07:14,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c8aedc-69c5-4c09-aa8c-849e4902abc0/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:07:14,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:07:14,455 INFO L262 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-12 02:07:14,464 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:07:22,341 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2023-11-12 02:07:22,341 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:07:22,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:07:22,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729620064] [2023-11-12 02:07:22,342 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:07:22,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505634280] [2023-11-12 02:07:22,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505634280] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:07:22,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:07:22,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-12 02:07:22,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099467256] [2023-11-12 02:07:22,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:07:22,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-12 02:07:22,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:07:22,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-12 02:07:22,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:07:22,345 INFO L87 Difference]: Start difference. First operand 179 states and 264 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 1 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) [2023-11-12 02:07:23,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:07:23,867 INFO L93 Difference]: Finished difference Result 421 states and 606 transitions. [2023-11-12 02:07:23,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-12 02:07:23,867 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 1 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) Word has length 146 [2023-11-12 02:07:23,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:07:23,876 INFO L225 Difference]: With dead ends: 421 [2023-11-12 02:07:23,876 INFO L226 Difference]: Without dead ends: 258 [2023-11-12 02:07:23,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2023-11-12 02:07:23,878 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 280 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-12 02:07:23,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 595 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-12 02:07:23,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2023-11-12 02:07:23,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 186. [2023-11-12 02:07:23,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 130 states have (on average 1.3153846153846154) internal successors, (171), 131 states have internal predecessors, (171), 52 states have call successors, (52), 3 states have call predecessors, (52), 3 states have return successors, (52), 51 states have call predecessors, (52), 52 states have call successors, (52) [2023-11-12 02:07:23,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 275 transitions. [2023-11-12 02:07:23,904 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 275 transitions. Word has length 146 [2023-11-12 02:07:23,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:07:23,905 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 275 transitions. [2023-11-12 02:07:23,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 1 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) [2023-11-12 02:07:23,906 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 275 transitions. [2023-11-12 02:07:23,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-11-12 02:07:23,908 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:07:23,908 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:07:23,917 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c8aedc-69c5-4c09-aa8c-849e4902abc0/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-12 02:07:24,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c8aedc-69c5-4c09-aa8c-849e4902abc0/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:07:24,115 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:07:24,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:07:24,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1361747985, now seen corresponding path program 1 times [2023-11-12 02:07:24,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:07:24,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039109590] [2023-11-12 02:07:24,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:07:24,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:07:24,143 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:07:24,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1809536963] [2023-11-12 02:07:24,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:07:24,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:07:24,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c8aedc-69c5-4c09-aa8c-849e4902abc0/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:07:24,145 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c8aedc-69c5-4c09-aa8c-849e4902abc0/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:07:24,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52c8aedc-69c5-4c09-aa8c-849e4902abc0/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:07:24,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:07:24,290 INFO L262 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-12 02:07:24,294 INFO L285 TraceCheckSpWp]: Computing forward predicates...