./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-atomic/read_write_lock-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 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_216c906d-63f2-434d-9205-e38bd4476e18/bin/utaipan-verify-QoSU8krkJ5/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216c906d-63f2-434d-9205-e38bd4476e18/bin/utaipan-verify-QoSU8krkJ5/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216c906d-63f2-434d-9205-e38bd4476e18/bin/utaipan-verify-QoSU8krkJ5/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216c906d-63f2-434d-9205-e38bd4476e18/bin/utaipan-verify-QoSU8krkJ5/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-atomic/read_write_lock-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216c906d-63f2-434d-9205-e38bd4476e18/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216c906d-63f2-434d-9205-e38bd4476e18/bin/utaipan-verify-QoSU8krkJ5 --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8fab2e995569cc819974baee7d52d8d4bdabd2a2896c83fb3b8d07b44f394c5b --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 19:36:12,041 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 19:36:12,114 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216c906d-63f2-434d-9205-e38bd4476e18/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-21 19:36:12,120 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 19:36:12,121 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 19:36:12,148 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 19:36:12,149 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 19:36:12,149 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 19:36:12,150 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 19:36:12,151 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 19:36:12,151 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-21 19:36:12,152 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-21 19:36:12,153 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-21 19:36:12,153 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-21 19:36:12,154 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-21 19:36:12,154 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-21 19:36:12,155 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-21 19:36:12,156 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-21 19:36:12,156 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-21 19:36:12,157 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-21 19:36:12,158 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-21 19:36:12,161 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-21 19:36:12,163 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 19:36:12,164 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 19:36:12,169 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 19:36:12,169 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 19:36:12,170 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 19:36:12,171 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 19:36:12,171 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 19:36:12,171 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 19:36:12,172 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 19:36:12,172 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 19:36:12,173 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 19:36:12,173 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 19:36:12,174 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 19:36:12,174 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 19:36:12,175 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 19:36:12,175 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:36:12,176 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 19:36:12,176 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 19:36:12,177 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 19:36:12,177 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-21 19:36:12,178 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 19:36:12,178 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 19:36:12,179 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 19:36:12,179 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-21 19:36:12,179 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 19:36:12,180 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_216c906d-63f2-434d-9205-e38bd4476e18/bin/utaipan-verify-QoSU8krkJ5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216c906d-63f2-434d-9205-e38bd4476e18/bin/utaipan-verify-QoSU8krkJ5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8fab2e995569cc819974baee7d52d8d4bdabd2a2896c83fb3b8d07b44f394c5b [2023-11-21 19:36:12,453 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 19:36:12,489 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 19:36:12,492 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 19:36:12,495 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 19:36:12,496 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 19:36:12,497 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216c906d-63f2-434d-9205-e38bd4476e18/bin/utaipan-verify-QoSU8krkJ5/../../sv-benchmarks/c/pthread-atomic/read_write_lock-1.i [2023-11-21 19:36:15,626 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 19:36:15,886 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 19:36:15,887 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216c906d-63f2-434d-9205-e38bd4476e18/sv-benchmarks/c/pthread-atomic/read_write_lock-1.i [2023-11-21 19:36:15,904 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216c906d-63f2-434d-9205-e38bd4476e18/bin/utaipan-verify-QoSU8krkJ5/data/50e29d4af/61c9b1a0133a4275a23561cf34e6b2a9/FLAG80d59482e [2023-11-21 19:36:15,927 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216c906d-63f2-434d-9205-e38bd4476e18/bin/utaipan-verify-QoSU8krkJ5/data/50e29d4af/61c9b1a0133a4275a23561cf34e6b2a9 [2023-11-21 19:36:15,935 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 19:36:15,938 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 19:36:15,941 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 19:36:15,942 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 19:36:15,947 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 19:36:15,948 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:36:15" (1/1) ... [2023-11-21 19:36:15,950 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41f1e7f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:36:15, skipping insertion in model container [2023-11-21 19:36:15,951 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:36:15" (1/1) ... [2023-11-21 19:36:16,000 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 19:36:16,182 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-21 19:36:16,368 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_216c906d-63f2-434d-9205-e38bd4476e18/sv-benchmarks/c/pthread-atomic/read_write_lock-1.i[31246,31259] [2023-11-21 19:36:16,387 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:36:16,399 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 19:36:16,424 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-21 19:36:16,459 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_216c906d-63f2-434d-9205-e38bd4476e18/sv-benchmarks/c/pthread-atomic/read_write_lock-1.i[31246,31259] [2023-11-21 19:36:16,479 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:36:16,528 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:36:16,528 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:36:16,528 WARN L675 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:36:16,537 INFO L206 MainTranslator]: Completed translation [2023-11-21 19:36:16,537 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:36:16 WrapperNode [2023-11-21 19:36:16,537 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 19:36:16,539 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 19:36:16,539 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 19:36:16,539 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 19:36:16,548 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:36:16" (1/1) ... [2023-11-21 19:36:16,589 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:36:16" (1/1) ... [2023-11-21 19:36:16,626 INFO L138 Inliner]: procedures = 175, calls = 46, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 113 [2023-11-21 19:36:16,627 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 19:36:16,627 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 19:36:16,628 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 19:36:16,628 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 19:36:16,638 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:36:16" (1/1) ... [2023-11-21 19:36:16,639 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:36:16" (1/1) ... [2023-11-21 19:36:16,657 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:36:16" (1/1) ... [2023-11-21 19:36:16,658 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:36:16" (1/1) ... [2023-11-21 19:36:16,665 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:36:16" (1/1) ... [2023-11-21 19:36:16,681 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:36:16" (1/1) ... [2023-11-21 19:36:16,683 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:36:16" (1/1) ... [2023-11-21 19:36:16,684 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:36:16" (1/1) ... [2023-11-21 19:36:16,688 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 19:36:16,689 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 19:36:16,689 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 19:36:16,689 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 19:36:16,690 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:36:16" (1/1) ... [2023-11-21 19:36:16,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:36:16,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216c906d-63f2-434d-9205-e38bd4476e18/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:36:16,726 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216c906d-63f2-434d-9205-e38bd4476e18/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 19:36:16,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216c906d-63f2-434d-9205-e38bd4476e18/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 19:36:16,780 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-21 19:36:16,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-21 19:36:16,781 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-21 19:36:16,781 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 19:36:16,781 INFO L130 BoogieDeclarations]: Found specification of procedure reader [2023-11-21 19:36:16,782 INFO L138 BoogieDeclarations]: Found implementation of procedure reader [2023-11-21 19:36:16,782 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 19:36:16,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 19:36:16,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-21 19:36:16,783 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-21 19:36:16,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 19:36:16,784 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 19:36:16,784 INFO L130 BoogieDeclarations]: Found specification of procedure writer [2023-11-21 19:36:16,785 INFO L138 BoogieDeclarations]: Found implementation of procedure writer [2023-11-21 19:36:16,786 WARN L212 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-21 19:36:16,994 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 19:36:16,997 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 19:36:17,291 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 19:36:17,482 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 19:36:17,482 INFO L308 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-21 19:36:17,484 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:36:17 BoogieIcfgContainer [2023-11-21 19:36:17,484 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 19:36:17,487 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 19:36:17,487 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 19:36:17,491 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 19:36:17,491 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 07:36:15" (1/3) ... [2023-11-21 19:36:17,492 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45b71576 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:36:17, skipping insertion in model container [2023-11-21 19:36:17,492 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:36:16" (2/3) ... [2023-11-21 19:36:17,493 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45b71576 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:36:17, skipping insertion in model container [2023-11-21 19:36:17,493 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:36:17" (3/3) ... [2023-11-21 19:36:17,494 INFO L112 eAbstractionObserver]: Analyzing ICFG read_write_lock-1.i [2023-11-21 19:36:17,504 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-21 19:36:17,516 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 19:36:17,517 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-21 19:36:17,517 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-21 19:36:17,578 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-21 19:36:17,632 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 66 places, 55 transitions, 138 flow [2023-11-21 19:36:18,485 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 12488 states, 12485 states have (on average 4.015538646375651) internal successors, (50134), 12487 states have internal predecessors, (50134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:36:18,515 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 19:36:18,522 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=FINITE_AUTOMATA, 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;@7c639841, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 19:36:18,522 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-21 19:36:18,563 INFO L276 IsEmpty]: Start isEmpty. Operand has 12488 states, 12485 states have (on average 4.015538646375651) internal successors, (50134), 12487 states have internal predecessors, (50134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:36:18,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-21 19:36:18,594 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:36:18,595 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:36:18,595 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-21 19:36:18,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:36:18,602 INFO L85 PathProgramCache]: Analyzing trace with hash 908592092, now seen corresponding path program 1 times [2023-11-21 19:36:18,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:36:18,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909704665] [2023-11-21 19:36:18,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:36:18,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:36:18,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:36:19,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:36:19,180 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:36:19,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909704665] [2023-11-21 19:36:19,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909704665] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:36:19,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:36:19,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 19:36:19,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338195987] [2023-11-21 19:36:19,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:36:19,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 19:36:19,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:36:19,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 19:36:19,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-21 19:36:19,279 INFO L87 Difference]: Start difference. First operand has 12488 states, 12485 states have (on average 4.015538646375651) internal successors, (50134), 12487 states have internal predecessors, (50134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:36:20,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:36:20,663 INFO L93 Difference]: Finished difference Result 25720 states and 97591 transitions. [2023-11-21 19:36:20,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-21 19:36:20,666 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-21 19:36:20,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:36:21,068 INFO L225 Difference]: With dead ends: 25720 [2023-11-21 19:36:21,069 INFO L226 Difference]: Without dead ends: 24514 [2023-11-21 19:36:21,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-11-21 19:36:21,074 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 242 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 19:36:21,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 188 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 19:36:21,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24514 states. [2023-11-21 19:36:22,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24514 to 15452. [2023-11-21 19:36:22,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15452 states, 15449 states have (on average 3.877661984594472) internal successors, (59906), 15451 states have internal predecessors, (59906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:36:22,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15452 states to 15452 states and 59906 transitions. [2023-11-21 19:36:22,388 INFO L78 Accepts]: Start accepts. Automaton has 15452 states and 59906 transitions. Word has length 12 [2023-11-21 19:36:22,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:36:22,390 INFO L495 AbstractCegarLoop]: Abstraction has 15452 states and 59906 transitions. [2023-11-21 19:36:22,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:36:22,390 INFO L276 IsEmpty]: Start isEmpty. Operand 15452 states and 59906 transitions. [2023-11-21 19:36:22,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-21 19:36:22,398 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:36:22,398 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:36:22,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 19:36:22,400 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-21 19:36:22,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:36:22,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1814842646, now seen corresponding path program 1 times [2023-11-21 19:36:22,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:36:22,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167549842] [2023-11-21 19:36:22,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:36:22,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:36:22,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:36:22,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:36:22,568 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:36:22,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167549842] [2023-11-21 19:36:22,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167549842] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:36:22,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:36:22,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:36:22,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512814348] [2023-11-21 19:36:22,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:36:22,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 19:36:22,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:36:22,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 19:36:22,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 19:36:22,572 INFO L87 Difference]: Start difference. First operand 15452 states and 59906 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:36:23,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:36:23,314 INFO L93 Difference]: Finished difference Result 20976 states and 74616 transitions. [2023-11-21 19:36:23,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 19:36:23,315 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-21 19:36:23,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:36:23,506 INFO L225 Difference]: With dead ends: 20976 [2023-11-21 19:36:23,507 INFO L226 Difference]: Without dead ends: 20752 [2023-11-21 19:36:23,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 19:36:23,509 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 72 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:36:23,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 88 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:36:23,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20752 states. [2023-11-21 19:36:24,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20752 to 16760. [2023-11-21 19:36:24,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16760 states, 16750 states have (on average 3.620776119402985) internal successors, (60648), 16759 states have internal predecessors, (60648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:36:24,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16760 states to 16760 states and 60648 transitions. [2023-11-21 19:36:24,433 INFO L78 Accepts]: Start accepts. Automaton has 16760 states and 60648 transitions. Word has length 15 [2023-11-21 19:36:24,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:36:24,433 INFO L495 AbstractCegarLoop]: Abstraction has 16760 states and 60648 transitions. [2023-11-21 19:36:24,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:36:24,434 INFO L276 IsEmpty]: Start isEmpty. Operand 16760 states and 60648 transitions. [2023-11-21 19:36:24,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-21 19:36:24,439 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:36:24,439 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:36:24,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-21 19:36:24,439 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-21 19:36:24,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:36:24,440 INFO L85 PathProgramCache]: Analyzing trace with hash -2039802068, now seen corresponding path program 2 times [2023-11-21 19:36:24,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:36:24,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458349] [2023-11-21 19:36:24,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:36:24,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:36:24,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:36:24,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:36:24,784 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:36:24,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458349] [2023-11-21 19:36:24,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458349] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:36:24,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:36:24,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:36:24,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644796507] [2023-11-21 19:36:24,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:36:24,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:36:24,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:36:24,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:36:24,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:36:24,787 INFO L87 Difference]: Start difference. First operand 16760 states and 60648 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:36:24,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:36:24,935 INFO L93 Difference]: Finished difference Result 8488 states and 28158 transitions. [2023-11-21 19:36:24,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:36:24,936 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-21 19:36:24,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:36:24,986 INFO L225 Difference]: With dead ends: 8488 [2023-11-21 19:36:24,986 INFO L226 Difference]: Without dead ends: 8304 [2023-11-21 19:36:24,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:36:24,988 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 33 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:36:24,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 50 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:36:25,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8304 states. [2023-11-21 19:36:25,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8304 to 8304. [2023-11-21 19:36:25,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8304 states, 8296 states have (on average 3.3237704918032787) internal successors, (27574), 8303 states have internal predecessors, (27574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:36:25,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8304 states to 8304 states and 27574 transitions. [2023-11-21 19:36:25,467 INFO L78 Accepts]: Start accepts. Automaton has 8304 states and 27574 transitions. Word has length 15 [2023-11-21 19:36:25,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:36:25,467 INFO L495 AbstractCegarLoop]: Abstraction has 8304 states and 27574 transitions. [2023-11-21 19:36:25,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:36:25,468 INFO L276 IsEmpty]: Start isEmpty. Operand 8304 states and 27574 transitions. [2023-11-21 19:36:25,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-21 19:36:25,472 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:36:25,473 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:36:25,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-21 19:36:25,473 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-21 19:36:25,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:36:25,474 INFO L85 PathProgramCache]: Analyzing trace with hash 823824437, now seen corresponding path program 1 times [2023-11-21 19:36:25,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:36:25,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237542781] [2023-11-21 19:36:25,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:36:25,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:36:25,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:36:25,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:36:25,601 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:36:25,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237542781] [2023-11-21 19:36:25,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237542781] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:36:25,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:36:25,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 19:36:25,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976952176] [2023-11-21 19:36:25,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:36:25,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 19:36:25,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:36:25,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 19:36:25,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-21 19:36:25,605 INFO L87 Difference]: Start difference. First operand 8304 states and 27574 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:36:26,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:36:26,222 INFO L93 Difference]: Finished difference Result 10698 states and 34612 transitions. [2023-11-21 19:36:26,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-21 19:36:26,222 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-21 19:36:26,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:36:26,263 INFO L225 Difference]: With dead ends: 10698 [2023-11-21 19:36:26,264 INFO L226 Difference]: Without dead ends: 8804 [2023-11-21 19:36:26,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-11-21 19:36:26,265 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 213 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 19:36:26,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 157 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 19:36:26,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8804 states. [2023-11-21 19:36:26,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8804 to 7094. [2023-11-21 19:36:26,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7094 states, 7092 states have (on average 3.2915961646926113) internal successors, (23344), 7093 states have internal predecessors, (23344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:36:26,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7094 states to 7094 states and 23344 transitions. [2023-11-21 19:36:26,588 INFO L78 Accepts]: Start accepts. Automaton has 7094 states and 23344 transitions. Word has length 16 [2023-11-21 19:36:26,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:36:26,589 INFO L495 AbstractCegarLoop]: Abstraction has 7094 states and 23344 transitions. [2023-11-21 19:36:26,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:36:26,590 INFO L276 IsEmpty]: Start isEmpty. Operand 7094 states and 23344 transitions. [2023-11-21 19:36:26,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-21 19:36:26,597 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:36:26,598 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:36:26,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-21 19:36:26,598 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-21 19:36:26,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:36:26,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1884776311, now seen corresponding path program 1 times [2023-11-21 19:36:26,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:36:26,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844804990] [2023-11-21 19:36:26,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:36:26,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:36:26,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:36:26,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:36:26,766 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:36:26,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844804990] [2023-11-21 19:36:26,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844804990] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:36:26,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:36:26,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 19:36:26,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813589134] [2023-11-21 19:36:26,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:36:26,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 19:36:26,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:36:26,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 19:36:26,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-21 19:36:26,770 INFO L87 Difference]: Start difference. First operand 7094 states and 23344 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:36:27,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:36:27,192 INFO L93 Difference]: Finished difference Result 8386 states and 26894 transitions. [2023-11-21 19:36:27,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-21 19:36:27,193 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-21 19:36:27,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:36:27,220 INFO L225 Difference]: With dead ends: 8386 [2023-11-21 19:36:27,221 INFO L226 Difference]: Without dead ends: 7816 [2023-11-21 19:36:27,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-11-21 19:36:27,224 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 160 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 19:36:27,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 136 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 19:36:27,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7816 states. [2023-11-21 19:36:27,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7816 to 6114. [2023-11-21 19:36:27,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6114 states, 6112 states have (on average 3.273887434554974) internal successors, (20010), 6113 states have internal predecessors, (20010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:36:27,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6114 states to 6114 states and 20010 transitions. [2023-11-21 19:36:27,545 INFO L78 Accepts]: Start accepts. Automaton has 6114 states and 20010 transitions. Word has length 20 [2023-11-21 19:36:27,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:36:27,545 INFO L495 AbstractCegarLoop]: Abstraction has 6114 states and 20010 transitions. [2023-11-21 19:36:27,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:36:27,546 INFO L276 IsEmpty]: Start isEmpty. Operand 6114 states and 20010 transitions. [2023-11-21 19:36:27,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-21 19:36:27,553 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:36:27,553 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:36:27,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-21 19:36:27,554 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-21 19:36:27,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:36:27,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1219668779, now seen corresponding path program 1 times [2023-11-21 19:36:27,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:36:27,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438992259] [2023-11-21 19:36:27,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:36:27,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:36:27,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:36:27,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:36:27,682 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:36:27,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438992259] [2023-11-21 19:36:27,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438992259] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:36:27,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:36:27,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 19:36:27,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104188456] [2023-11-21 19:36:27,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:36:27,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 19:36:27,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:36:27,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 19:36:27,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-21 19:36:27,685 INFO L87 Difference]: Start difference. First operand 6114 states and 20010 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:36:28,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:36:28,202 INFO L93 Difference]: Finished difference Result 7106 states and 22734 transitions. [2023-11-21 19:36:28,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-21 19:36:28,203 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-21 19:36:28,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:36:28,230 INFO L225 Difference]: With dead ends: 7106 [2023-11-21 19:36:28,230 INFO L226 Difference]: Without dead ends: 6230 [2023-11-21 19:36:28,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-11-21 19:36:28,233 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 138 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 19:36:28,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 129 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 19:36:28,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6230 states. [2023-11-21 19:36:28,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6230 to 4762. [2023-11-21 19:36:28,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4762 states, 4760 states have (on average 3.2558823529411764) internal successors, (15498), 4761 states have internal predecessors, (15498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:36:28,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4762 states to 4762 states and 15498 transitions. [2023-11-21 19:36:28,450 INFO L78 Accepts]: Start accepts. Automaton has 4762 states and 15498 transitions. Word has length 20 [2023-11-21 19:36:28,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:36:28,451 INFO L495 AbstractCegarLoop]: Abstraction has 4762 states and 15498 transitions. [2023-11-21 19:36:28,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:36:28,452 INFO L276 IsEmpty]: Start isEmpty. Operand 4762 states and 15498 transitions. [2023-11-21 19:36:28,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-21 19:36:28,468 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:36:28,469 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:36:28,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-21 19:36:28,469 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-21 19:36:28,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:36:28,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1051051472, now seen corresponding path program 1 times [2023-11-21 19:36:28,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:36:28,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752492539] [2023-11-21 19:36:28,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:36:28,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:36:28,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:36:28,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:36:28,618 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:36:28,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752492539] [2023-11-21 19:36:28,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752492539] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:36:28,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:36:28,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 19:36:28,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239829642] [2023-11-21 19:36:28,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:36:28,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 19:36:28,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:36:28,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 19:36:28,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:36:28,621 INFO L87 Difference]: Start difference. First operand 4762 states and 15498 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:36:28,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:36:28,783 INFO L93 Difference]: Finished difference Result 5562 states and 17850 transitions. [2023-11-21 19:36:28,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 19:36:28,784 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-11-21 19:36:28,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:36:28,800 INFO L225 Difference]: With dead ends: 5562 [2023-11-21 19:36:28,800 INFO L226 Difference]: Without dead ends: 4202 [2023-11-21 19:36:28,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:36:28,802 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 69 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:36:28,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 102 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:36:28,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4202 states. [2023-11-21 19:36:28,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4202 to 3866. [2023-11-21 19:36:28,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3866 states, 3864 states have (on average 3.141304347826087) internal successors, (12138), 3865 states have internal predecessors, (12138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:36:28,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3866 states to 3866 states and 12138 transitions. [2023-11-21 19:36:28,954 INFO L78 Accepts]: Start accepts. Automaton has 3866 states and 12138 transitions. Word has length 27 [2023-11-21 19:36:28,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:36:28,954 INFO L495 AbstractCegarLoop]: Abstraction has 3866 states and 12138 transitions. [2023-11-21 19:36:28,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:36:28,955 INFO L276 IsEmpty]: Start isEmpty. Operand 3866 states and 12138 transitions. [2023-11-21 19:36:28,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-21 19:36:28,968 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:36:28,969 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:36:28,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-21 19:36:28,969 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-21 19:36:28,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:36:28,970 INFO L85 PathProgramCache]: Analyzing trace with hash -927126020, now seen corresponding path program 1 times [2023-11-21 19:36:28,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:36:28,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871124561] [2023-11-21 19:36:28,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:36:28,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:36:28,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:36:29,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:36:29,089 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:36:29,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871124561] [2023-11-21 19:36:29,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871124561] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:36:29,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:36:29,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:36:29,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575241558] [2023-11-21 19:36:29,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:36:29,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 19:36:29,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:36:29,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 19:36:29,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-21 19:36:29,092 INFO L87 Difference]: Start difference. First operand 3866 states and 12138 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:36:29,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:36:29,168 INFO L93 Difference]: Finished difference Result 1918 states and 5640 transitions. [2023-11-21 19:36:29,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 19:36:29,169 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-11-21 19:36:29,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:36:29,169 INFO L225 Difference]: With dead ends: 1918 [2023-11-21 19:36:29,169 INFO L226 Difference]: Without dead ends: 0 [2023-11-21 19:36:29,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-21 19:36:29,170 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 35 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:36:29,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 24 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:36:29,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-11-21 19:36:29,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-11-21 19:36:29,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:36:29,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-11-21 19:36:29,172 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2023-11-21 19:36:29,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:36:29,173 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-21 19:36:29,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:36:29,173 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-11-21 19:36:29,173 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-11-21 19:36:29,176 INFO L805 garLoopResultBuilder]: Registering result SAFE for location readerErr0ASSERT_VIOLATIONERROR_FUNCTION (6 of 7 remaining) [2023-11-21 19:36:29,176 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 7 remaining) [2023-11-21 19:36:29,177 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 7 remaining) [2023-11-21 19:36:29,177 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 7 remaining) [2023-11-21 19:36:29,177 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 7 remaining) [2023-11-21 19:36:29,177 INFO L805 garLoopResultBuilder]: Registering result SAFE for location readerErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2023-11-21 19:36:29,177 INFO L805 garLoopResultBuilder]: Registering result SAFE for location readerErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-11-21 19:36:29,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-21 19:36:29,181 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1] [2023-11-21 19:36:29,186 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-21 19:36:29,187 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-21 19:36:29,190 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.11 07:36:29 BasicIcfg [2023-11-21 19:36:29,190 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-21 19:36:29,191 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-21 19:36:29,191 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-21 19:36:29,191 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-21 19:36:29,192 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:36:17" (3/4) ... [2023-11-21 19:36:29,194 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-21 19:36:29,197 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure reader [2023-11-21 19:36:29,197 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure writer [2023-11-21 19:36:29,202 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 49 nodes and edges [2023-11-21 19:36:29,203 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 19 nodes and edges [2023-11-21 19:36:29,203 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2023-11-21 19:36:29,203 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-11-21 19:36:29,287 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216c906d-63f2-434d-9205-e38bd4476e18/bin/utaipan-verify-QoSU8krkJ5/witness.graphml [2023-11-21 19:36:29,287 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216c906d-63f2-434d-9205-e38bd4476e18/bin/utaipan-verify-QoSU8krkJ5/witness.yml [2023-11-21 19:36:29,287 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-21 19:36:29,288 INFO L158 Benchmark]: Toolchain (without parser) took 13349.78ms. Allocated memory was 130.0MB in the beginning and 5.8GB in the end (delta: 5.6GB). Free memory was 91.2MB in the beginning and 5.1GB in the end (delta: -5.0GB). Peak memory consumption was 590.9MB. Max. memory is 16.1GB. [2023-11-21 19:36:29,288 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 130.0MB. Free memory is still 84.7MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-21 19:36:29,289 INFO L158 Benchmark]: CACSL2BoogieTranslator took 596.41ms. Allocated memory is still 130.0MB. Free memory was 90.8MB in the beginning and 70.3MB in the end (delta: 20.6MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2023-11-21 19:36:29,289 INFO L158 Benchmark]: Boogie Procedure Inliner took 88.29ms. Allocated memory is still 130.0MB. Free memory was 70.3MB in the beginning and 68.1MB in the end (delta: 2.2MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-21 19:36:29,290 INFO L158 Benchmark]: Boogie Preprocessor took 60.55ms. Allocated memory is still 130.0MB. Free memory was 68.1MB in the beginning and 66.5MB in the end (delta: 1.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-21 19:36:29,290 INFO L158 Benchmark]: RCFGBuilder took 795.65ms. Allocated memory is still 130.0MB. Free memory was 66.5MB in the beginning and 92.5MB in the end (delta: -26.0MB). Peak memory consumption was 24.1MB. Max. memory is 16.1GB. [2023-11-21 19:36:29,291 INFO L158 Benchmark]: TraceAbstraction took 11703.80ms. Allocated memory was 130.0MB in the beginning and 5.8GB in the end (delta: 5.6GB). Free memory was 91.8MB in the beginning and 5.1GB in the end (delta: -5.0GB). Peak memory consumption was 585.7MB. Max. memory is 16.1GB. [2023-11-21 19:36:29,291 INFO L158 Benchmark]: Witness Printer took 96.48ms. Allocated memory is still 5.8GB. Free memory was 5.1GB in the beginning and 5.1GB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-21 19:36:29,293 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 130.0MB. Free memory is still 84.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 596.41ms. Allocated memory is still 130.0MB. Free memory was 90.8MB in the beginning and 70.3MB in the end (delta: 20.6MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 88.29ms. Allocated memory is still 130.0MB. Free memory was 70.3MB in the beginning and 68.1MB in the end (delta: 2.2MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 60.55ms. Allocated memory is still 130.0MB. Free memory was 68.1MB in the beginning and 66.5MB in the end (delta: 1.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 795.65ms. Allocated memory is still 130.0MB. Free memory was 66.5MB in the beginning and 92.5MB in the end (delta: -26.0MB). Peak memory consumption was 24.1MB. Max. memory is 16.1GB. * TraceAbstraction took 11703.80ms. Allocated memory was 130.0MB in the beginning and 5.8GB in the end (delta: 5.6GB). Free memory was 91.8MB in the beginning and 5.1GB in the end (delta: -5.0GB). Peak memory consumption was 585.7MB. Max. memory is 16.1GB. * Witness Printer took 96.48ms. Allocated memory is still 5.8GB. Free memory was 5.1GB in the beginning and 5.1GB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 739]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 76 locations, 7 error locations. Started 1 CEGAR loops. OverallTime: 11.6s, OverallIterations: 8, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.1s, AutomataDifference: 5.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.9s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 962 SdHoareTripleChecker+Valid, 1.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 962 mSDsluCounter, 874 SdHoareTripleChecker+Invalid, 1.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 543 mSDsCounter, 27 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2087 IncrementalHoareTripleChecker+Invalid, 2114 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 27 mSolverCounterUnsat, 331 mSDtfsCounter, 2087 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=16760occurred in iteration=2, InterpolantAutomatonStates: 58, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 3.7s AutomataMinimizationTime, 8 MinimizatonAttempts, 18270 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 152 NumberOfCodeBlocks, 152 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 144 ConstructedInterpolants, 0 QuantifiedInterpolants, 278 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-11-21 19:36:29,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_216c906d-63f2-434d-9205-e38bd4476e18/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE