./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.09.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc 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_ba865e74-e779-4ddc-a377-40223b596663/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba865e74-e779-4ddc-a377-40223b596663/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba865e74-e779-4ddc-a377-40223b596663/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba865e74-e779-4ddc-a377-40223b596663/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.09.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba865e74-e779-4ddc-a377-40223b596663/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba865e74-e779-4ddc-a377-40223b596663/bin/utaipan-verify-nQ1chXbOIh --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 93c2f95927688290d9634a76e5cb5c078ca9f28d9ebb5a85520405b4d17220b1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 19:41:01,710 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 19:41:01,774 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba865e74-e779-4ddc-a377-40223b596663/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 19:41:01,778 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 19:41:01,779 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 19:41:01,803 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 19:41:01,803 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 19:41:01,804 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 19:41:01,804 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 19:41:01,805 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 19:41:01,806 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 19:41:01,806 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 19:41:01,807 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 19:41:01,807 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 19:41:01,808 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 19:41:01,808 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 19:41:01,809 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 19:41:01,809 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 19:41:01,810 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 19:41:01,810 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 19:41:01,811 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 19:41:01,812 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 19:41:01,813 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 19:41:01,813 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 19:41:01,813 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 19:41:01,814 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 19:41:01,814 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 19:41:01,815 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 19:41:01,815 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 19:41:01,816 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 19:41:01,816 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 19:41:01,816 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 19:41:01,817 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 19:41:01,817 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 19:41:01,817 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 19:41:01,817 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 19:41:01,818 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 19:41:01,818 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 19:41:01,818 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 19:41:01,818 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 19:41:01,818 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 19:41:01,819 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 19:41:01,819 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 19:41:01,819 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 19:41:01,819 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 19:41:01,820 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 19:41:01,820 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 19:41:01,820 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_ba865e74-e779-4ddc-a377-40223b596663/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba865e74-e779-4ddc-a377-40223b596663/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 93c2f95927688290d9634a76e5cb5c078ca9f28d9ebb5a85520405b4d17220b1 [2023-12-02 19:41:02,040 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 19:41:02,062 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 19:41:02,065 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 19:41:02,066 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 19:41:02,067 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 19:41:02,068 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba865e74-e779-4ddc-a377-40223b596663/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.09.cil-1.c [2023-12-02 19:41:04,848 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 19:41:05,064 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 19:41:05,064 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba865e74-e779-4ddc-a377-40223b596663/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.09.cil-1.c [2023-12-02 19:41:05,082 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba865e74-e779-4ddc-a377-40223b596663/bin/utaipan-verify-nQ1chXbOIh/data/28a5c923b/e6f4723647674617b4862edd751b23d4/FLAGc05732f0c [2023-12-02 19:41:05,095 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba865e74-e779-4ddc-a377-40223b596663/bin/utaipan-verify-nQ1chXbOIh/data/28a5c923b/e6f4723647674617b4862edd751b23d4 [2023-12-02 19:41:05,097 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 19:41:05,099 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 19:41:05,100 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 19:41:05,100 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 19:41:05,105 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 19:41:05,106 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:41:05" (1/1) ... [2023-12-02 19:41:05,107 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@223f78a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:41:05, skipping insertion in model container [2023-12-02 19:41:05,107 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:41:05" (1/1) ... [2023-12-02 19:41:05,162 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 19:41:05,294 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_ba865e74-e779-4ddc-a377-40223b596663/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.09.cil-1.c[911,924] [2023-12-02 19:41:05,361 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_ba865e74-e779-4ddc-a377-40223b596663/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.09.cil-1.c[8416,8429] [2023-12-02 19:41:05,441 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 19:41:05,452 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 19:41:05,465 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_ba865e74-e779-4ddc-a377-40223b596663/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.09.cil-1.c[911,924] [2023-12-02 19:41:05,488 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_ba865e74-e779-4ddc-a377-40223b596663/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.09.cil-1.c[8416,8429] [2023-12-02 19:41:05,532 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 19:41:05,557 INFO L206 MainTranslator]: Completed translation [2023-12-02 19:41:05,558 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:41:05 WrapperNode [2023-12-02 19:41:05,558 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 19:41:05,559 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 19:41:05,559 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 19:41:05,559 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 19:41:05,567 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:41:05" (1/1) ... [2023-12-02 19:41:05,583 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:41:05" (1/1) ... [2023-12-02 19:41:05,630 INFO L138 Inliner]: procedures = 73, calls = 88, calls flagged for inlining = 42, calls inlined = 42, statements flattened = 928 [2023-12-02 19:41:05,630 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 19:41:05,631 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 19:41:05,631 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 19:41:05,631 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 19:41:05,639 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:41:05" (1/1) ... [2023-12-02 19:41:05,639 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:41:05" (1/1) ... [2023-12-02 19:41:05,643 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:41:05" (1/1) ... [2023-12-02 19:41:05,644 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:41:05" (1/1) ... [2023-12-02 19:41:05,658 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:41:05" (1/1) ... [2023-12-02 19:41:05,674 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:41:05" (1/1) ... [2023-12-02 19:41:05,678 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:41:05" (1/1) ... [2023-12-02 19:41:05,683 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:41:05" (1/1) ... [2023-12-02 19:41:05,691 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 19:41:05,693 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 19:41:05,693 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 19:41:05,693 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 19:41:05,694 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:41:05" (1/1) ... [2023-12-02 19:41:05,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 19:41:05,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba865e74-e779-4ddc-a377-40223b596663/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:41:05,733 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba865e74-e779-4ddc-a377-40223b596663/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 19:41:05,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba865e74-e779-4ddc-a377-40223b596663/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 19:41:05,777 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 19:41:05,777 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-12-02 19:41:05,777 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-12-02 19:41:05,778 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2023-12-02 19:41:05,778 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2023-12-02 19:41:05,778 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2023-12-02 19:41:05,778 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2023-12-02 19:41:05,778 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2023-12-02 19:41:05,778 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2023-12-02 19:41:05,779 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2023-12-02 19:41:05,779 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2023-12-02 19:41:05,779 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2023-12-02 19:41:05,779 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2023-12-02 19:41:05,779 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2023-12-02 19:41:05,779 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2023-12-02 19:41:05,780 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2023-12-02 19:41:05,780 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2023-12-02 19:41:05,780 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2023-12-02 19:41:05,780 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2023-12-02 19:41:05,780 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2023-12-02 19:41:05,780 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2023-12-02 19:41:05,781 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2023-12-02 19:41:05,781 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2023-12-02 19:41:05,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 19:41:05,781 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2023-12-02 19:41:05,781 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2023-12-02 19:41:05,781 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2023-12-02 19:41:05,782 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2023-12-02 19:41:05,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 19:41:05,782 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 19:41:05,782 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2023-12-02 19:41:05,782 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2023-12-02 19:41:05,929 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 19:41:05,931 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 19:41:06,670 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##56: assume !(1 == ~q_free~0); [2023-12-02 19:41:06,670 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##55: assume 1 == ~q_free~0;~c_dr_st~0 := 2;~c_dr_pc~0 := 2;~a_t~0 := do_read_c_~a~0#1; [2023-12-02 19:41:06,744 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 19:41:07,156 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 19:41:07,156 INFO L309 CfgBuilder]: Removed 16 assume(true) statements. [2023-12-02 19:41:07,158 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:41:07 BoogieIcfgContainer [2023-12-02 19:41:07,158 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 19:41:07,161 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 19:41:07,161 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 19:41:07,164 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 19:41:07,165 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 07:41:05" (1/3) ... [2023-12-02 19:41:07,165 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27d827ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:41:07, skipping insertion in model container [2023-12-02 19:41:07,165 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:41:05" (2/3) ... [2023-12-02 19:41:07,166 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27d827ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:41:07, skipping insertion in model container [2023-12-02 19:41:07,166 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:41:07" (3/3) ... [2023-12-02 19:41:07,167 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_3.cil+token_ring.09.cil-1.c [2023-12-02 19:41:07,189 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 19:41:07,189 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-12-02 19:41:07,251 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 19:41:07,259 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;@ebf800c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 19:41:07,259 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-12-02 19:41:07,266 INFO L276 IsEmpty]: Start isEmpty. Operand has 244 states, 188 states have (on average 1.5053191489361701) internal successors, (283), 194 states have internal predecessors, (283), 39 states have call successors, (39), 14 states have call predecessors, (39), 14 states have return successors, (39), 38 states have call predecessors, (39), 39 states have call successors, (39) [2023-12-02 19:41:07,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-12-02 19:41:07,286 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:41:07,287 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:41:07,288 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:41:07,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:41:07,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1815360929, now seen corresponding path program 1 times [2023-12-02 19:41:07,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:41:07,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302999019] [2023-12-02 19:41:07,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:41:07,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:41:07,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:41:07,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:41:07,665 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:41:07,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302999019] [2023-12-02 19:41:07,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302999019] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:41:07,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:41:07,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 19:41:07,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128323546] [2023-12-02 19:41:07,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:41:07,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 19:41:07,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:41:07,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 19:41:07,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 19:41:07,711 INFO L87 Difference]: Start difference. First operand has 244 states, 188 states have (on average 1.5053191489361701) internal successors, (283), 194 states have internal predecessors, (283), 39 states have call successors, (39), 14 states have call predecessors, (39), 14 states have return successors, (39), 38 states have call predecessors, (39), 39 states have call successors, (39) Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-02 19:41:08,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:41:08,208 INFO L93 Difference]: Finished difference Result 611 states and 900 transitions. [2023-12-02 19:41:08,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 19:41:08,210 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 44 [2023-12-02 19:41:08,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:41:08,225 INFO L225 Difference]: With dead ends: 611 [2023-12-02 19:41:08,225 INFO L226 Difference]: Without dead ends: 368 [2023-12-02 19:41:08,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 19:41:08,234 INFO L413 NwaCegarLoop]: 349 mSDtfsCounter, 413 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 19:41:08,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [413 Valid, 618 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 19:41:08,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2023-12-02 19:41:08,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 357. [2023-12-02 19:41:08,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 269 states have (on average 1.4237918215613383) internal successors, (383), 273 states have internal predecessors, (383), 59 states have call successors, (59), 28 states have call predecessors, (59), 27 states have return successors, (60), 57 states have call predecessors, (60), 57 states have call successors, (60) [2023-12-02 19:41:08,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 502 transitions. [2023-12-02 19:41:08,325 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 502 transitions. Word has length 44 [2023-12-02 19:41:08,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:41:08,325 INFO L495 AbstractCegarLoop]: Abstraction has 357 states and 502 transitions. [2023-12-02 19:41:08,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-02 19:41:08,326 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 502 transitions. [2023-12-02 19:41:08,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-02 19:41:08,332 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:41:08,332 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:41:08,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 19:41:08,333 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:41:08,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:41:08,334 INFO L85 PathProgramCache]: Analyzing trace with hash 2067080412, now seen corresponding path program 1 times [2023-12-02 19:41:08,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:41:08,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085930000] [2023-12-02 19:41:08,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:41:08,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:41:08,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:41:08,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:41:08,458 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:41:08,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085930000] [2023-12-02 19:41:08,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085930000] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:41:08,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:41:08,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 19:41:08,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278145862] [2023-12-02 19:41:08,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:41:08,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 19:41:08,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:41:08,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 19:41:08,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 19:41:08,462 INFO L87 Difference]: Start difference. First operand 357 states and 502 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-02 19:41:09,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:41:09,397 INFO L93 Difference]: Finished difference Result 894 states and 1225 transitions. [2023-12-02 19:41:09,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 19:41:09,398 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2023-12-02 19:41:09,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:41:09,403 INFO L225 Difference]: With dead ends: 894 [2023-12-02 19:41:09,403 INFO L226 Difference]: Without dead ends: 428 [2023-12-02 19:41:09,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-12-02 19:41:09,407 INFO L413 NwaCegarLoop]: 399 mSDtfsCounter, 898 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 906 SdHoareTripleChecker+Valid, 1035 SdHoareTripleChecker+Invalid, 997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 19:41:09,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [906 Valid, 1035 Invalid, 997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 19:41:09,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2023-12-02 19:41:09,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 343. [2023-12-02 19:41:09,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 255 states have (on average 1.3725490196078431) internal successors, (350), 259 states have internal predecessors, (350), 59 states have call successors, (59), 28 states have call predecessors, (59), 27 states have return successors, (57), 57 states have call predecessors, (57), 57 states have call successors, (57) [2023-12-02 19:41:09,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 466 transitions. [2023-12-02 19:41:09,447 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 466 transitions. Word has length 45 [2023-12-02 19:41:09,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:41:09,448 INFO L495 AbstractCegarLoop]: Abstraction has 343 states and 466 transitions. [2023-12-02 19:41:09,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-02 19:41:09,448 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 466 transitions. [2023-12-02 19:41:09,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-12-02 19:41:09,450 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:41:09,450 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:41:09,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 19:41:09,451 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:41:09,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:41:09,451 INFO L85 PathProgramCache]: Analyzing trace with hash -445889240, now seen corresponding path program 1 times [2023-12-02 19:41:09,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:41:09,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864862247] [2023-12-02 19:41:09,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:41:09,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:41:09,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:41:09,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:41:09,549 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:41:09,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864862247] [2023-12-02 19:41:09,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864862247] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:41:09,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:41:09,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 19:41:09,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108415519] [2023-12-02 19:41:09,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:41:09,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 19:41:09,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:41:09,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 19:41:09,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 19:41:09,552 INFO L87 Difference]: Start difference. First operand 343 states and 466 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-02 19:41:10,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:41:10,302 INFO L93 Difference]: Finished difference Result 809 states and 1074 transitions. [2023-12-02 19:41:10,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 19:41:10,303 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 46 [2023-12-02 19:41:10,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:41:10,309 INFO L225 Difference]: With dead ends: 809 [2023-12-02 19:41:10,309 INFO L226 Difference]: Without dead ends: 632 [2023-12-02 19:41:10,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-12-02 19:41:10,312 INFO L413 NwaCegarLoop]: 393 mSDtfsCounter, 805 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 811 SdHoareTripleChecker+Valid, 996 SdHoareTripleChecker+Invalid, 886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 19:41:10,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [811 Valid, 996 Invalid, 886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 19:41:10,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2023-12-02 19:41:10,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 607. [2023-12-02 19:41:10,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 436 states have (on average 1.305045871559633) internal successors, (569), 440 states have internal predecessors, (569), 108 states have call successors, (108), 62 states have call predecessors, (108), 61 states have return successors, (123), 106 states have call predecessors, (123), 106 states have call successors, (123) [2023-12-02 19:41:10,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 800 transitions. [2023-12-02 19:41:10,366 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 800 transitions. Word has length 46 [2023-12-02 19:41:10,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:41:10,366 INFO L495 AbstractCegarLoop]: Abstraction has 607 states and 800 transitions. [2023-12-02 19:41:10,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-02 19:41:10,367 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 800 transitions. [2023-12-02 19:41:10,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-12-02 19:41:10,368 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:41:10,368 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:41:10,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 19:41:10,369 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:41:10,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:41:10,370 INFO L85 PathProgramCache]: Analyzing trace with hash 787235040, now seen corresponding path program 1 times [2023-12-02 19:41:10,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:41:10,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471210982] [2023-12-02 19:41:10,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:41:10,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:41:10,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:41:10,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:41:10,419 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:41:10,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471210982] [2023-12-02 19:41:10,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471210982] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:41:10,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:41:10,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:41:10,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199431420] [2023-12-02 19:41:10,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:41:10,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:41:10,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:41:10,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:41:10,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:41:10,422 INFO L87 Difference]: Start difference. First operand 607 states and 800 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 19:41:10,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:41:10,549 INFO L93 Difference]: Finished difference Result 608 states and 801 transitions. [2023-12-02 19:41:10,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:41:10,549 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 50 [2023-12-02 19:41:10,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:41:10,551 INFO L225 Difference]: With dead ends: 608 [2023-12-02 19:41:10,552 INFO L226 Difference]: Without dead ends: 164 [2023-12-02 19:41:10,553 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 [2023-12-02 19:41:10,555 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 310 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:41:10,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [310 Valid, 273 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:41:10,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2023-12-02 19:41:10,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2023-12-02 19:41:10,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 134 states have (on average 1.4701492537313432) internal successors, (197), 135 states have internal predecessors, (197), 23 states have call successors, (23), 6 states have call predecessors, (23), 6 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2023-12-02 19:41:10,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 243 transitions. [2023-12-02 19:41:10,569 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 243 transitions. Word has length 50 [2023-12-02 19:41:10,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:41:10,570 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 243 transitions. [2023-12-02 19:41:10,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 19:41:10,570 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 243 transitions. [2023-12-02 19:41:10,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-12-02 19:41:10,572 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:41:10,572 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:41:10,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 19:41:10,572 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:41:10,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:41:10,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1852349890, now seen corresponding path program 1 times [2023-12-02 19:41:10,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:41:10,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568244479] [2023-12-02 19:41:10,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:41:10,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:41:10,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:41:10,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:41:10,727 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:41:10,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568244479] [2023-12-02 19:41:10,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568244479] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:41:10,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:41:10,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 19:41:10,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960065124] [2023-12-02 19:41:10,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:41:10,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 19:41:10,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:41:10,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 19:41:10,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 19:41:10,730 INFO L87 Difference]: Start difference. First operand 164 states and 243 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 19:41:11,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:41:11,466 INFO L93 Difference]: Finished difference Result 927 states and 1461 transitions. [2023-12-02 19:41:11,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 19:41:11,466 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 58 [2023-12-02 19:41:11,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:41:11,473 INFO L225 Difference]: With dead ends: 927 [2023-12-02 19:41:11,473 INFO L226 Difference]: Without dead ends: 769 [2023-12-02 19:41:11,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-02 19:41:11,476 INFO L413 NwaCegarLoop]: 376 mSDtfsCounter, 1096 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1097 SdHoareTripleChecker+Valid, 1026 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 19:41:11,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1097 Valid, 1026 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 19:41:11,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2023-12-02 19:41:11,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 758. [2023-12-02 19:41:11,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 631 states have (on average 1.4690966719492868) internal successors, (927), 635 states have internal predecessors, (927), 96 states have call successors, (96), 30 states have call predecessors, (96), 30 states have return successors, (146), 93 states have call predecessors, (146), 96 states have call successors, (146) [2023-12-02 19:41:11,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 1169 transitions. [2023-12-02 19:41:11,549 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 1169 transitions. Word has length 58 [2023-12-02 19:41:11,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:41:11,549 INFO L495 AbstractCegarLoop]: Abstraction has 758 states and 1169 transitions. [2023-12-02 19:41:11,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 19:41:11,550 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 1169 transitions. [2023-12-02 19:41:11,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-12-02 19:41:11,554 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:41:11,554 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:41:11,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 19:41:11,554 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:41:11,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:41:11,555 INFO L85 PathProgramCache]: Analyzing trace with hash -408271019, now seen corresponding path program 1 times [2023-12-02 19:41:11,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:41:11,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287833233] [2023-12-02 19:41:11,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:41:11,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:41:11,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:41:11,753 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 19:41:11,753 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:41:11,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287833233] [2023-12-02 19:41:11,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287833233] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:41:11,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862838419] [2023-12-02 19:41:11,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:41:11,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:41:11,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba865e74-e779-4ddc-a377-40223b596663/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:41:11,763 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba865e74-e779-4ddc-a377-40223b596663/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:41:11,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba865e74-e779-4ddc-a377-40223b596663/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 19:41:11,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:41:11,993 INFO L262 TraceCheckSpWp]: Trace formula consists of 837 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 19:41:12,003 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:41:12,061 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-02 19:41:12,062 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 19:41:12,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862838419] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:41:12,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 19:41:12,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 19:41:12,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075781583] [2023-12-02 19:41:12,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:41:12,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:41:12,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:41:12,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:41:12,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 19:41:12,065 INFO L87 Difference]: Start difference. First operand 758 states and 1169 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 19:41:12,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:41:12,290 INFO L93 Difference]: Finished difference Result 2246 states and 3562 transitions. [2023-12-02 19:41:12,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:41:12,293 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 116 [2023-12-02 19:41:12,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:41:12,305 INFO L225 Difference]: With dead ends: 2246 [2023-12-02 19:41:12,305 INFO L226 Difference]: Without dead ends: 1494 [2023-12-02 19:41:12,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 19:41:12,312 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 215 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:41:12,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 391 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:41:12,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2023-12-02 19:41:12,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 1487. [2023-12-02 19:41:12,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1487 states, 1243 states have (on average 1.4641995172968625) internal successors, (1820), 1250 states have internal predecessors, (1820), 183 states have call successors, (183), 60 states have call predecessors, (183), 60 states have return successors, (279), 177 states have call predecessors, (279), 183 states have call successors, (279) [2023-12-02 19:41:12,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1487 states to 1487 states and 2282 transitions. [2023-12-02 19:41:12,438 INFO L78 Accepts]: Start accepts. Automaton has 1487 states and 2282 transitions. Word has length 116 [2023-12-02 19:41:12,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:41:12,438 INFO L495 AbstractCegarLoop]: Abstraction has 1487 states and 2282 transitions. [2023-12-02 19:41:12,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 19:41:12,439 INFO L276 IsEmpty]: Start isEmpty. Operand 1487 states and 2282 transitions. [2023-12-02 19:41:12,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-12-02 19:41:12,443 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:41:12,444 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:41:12,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba865e74-e779-4ddc-a377-40223b596663/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 19:41:12,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba865e74-e779-4ddc-a377-40223b596663/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-12-02 19:41:12,646 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:41:12,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:41:12,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1380160147, now seen corresponding path program 1 times [2023-12-02 19:41:12,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:41:12,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813964615] [2023-12-02 19:41:12,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:41:12,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:41:12,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:41:12,825 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 19:41:12,825 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:41:12,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813964615] [2023-12-02 19:41:12,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813964615] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:41:12,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358141111] [2023-12-02 19:41:12,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:41:12,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:41:12,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba865e74-e779-4ddc-a377-40223b596663/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:41:12,827 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba865e74-e779-4ddc-a377-40223b596663/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:41:12,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba865e74-e779-4ddc-a377-40223b596663/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 19:41:13,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:41:13,041 INFO L262 TraceCheckSpWp]: Trace formula consists of 831 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 19:41:13,048 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:41:13,110 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 19:41:13,110 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 19:41:13,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358141111] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:41:13,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 19:41:13,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 19:41:13,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053129800] [2023-12-02 19:41:13,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:41:13,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:41:13,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:41:13,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:41:13,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 19:41:13,113 INFO L87 Difference]: Start difference. First operand 1487 states and 2282 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 19:41:13,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:41:13,406 INFO L93 Difference]: Finished difference Result 4418 states and 6966 transitions. [2023-12-02 19:41:13,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:41:13,406 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 116 [2023-12-02 19:41:13,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:41:13,427 INFO L225 Difference]: With dead ends: 4418 [2023-12-02 19:41:13,427 INFO L226 Difference]: Without dead ends: 2937 [2023-12-02 19:41:13,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 19:41:13,436 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 206 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:41:13,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 391 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:41:13,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2937 states. [2023-12-02 19:41:13,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2937 to 2925. [2023-12-02 19:41:13,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2925 states, 2452 states have (on average 1.4584013050570963) internal successors, (3576), 2465 states have internal predecessors, (3576), 352 states have call successors, (352), 120 states have call predecessors, (352), 120 states have return successors, (536), 340 states have call predecessors, (536), 352 states have call successors, (536) [2023-12-02 19:41:13,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2925 states to 2925 states and 4464 transitions. [2023-12-02 19:41:13,692 INFO L78 Accepts]: Start accepts. Automaton has 2925 states and 4464 transitions. Word has length 116 [2023-12-02 19:41:13,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:41:13,693 INFO L495 AbstractCegarLoop]: Abstraction has 2925 states and 4464 transitions. [2023-12-02 19:41:13,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 19:41:13,693 INFO L276 IsEmpty]: Start isEmpty. Operand 2925 states and 4464 transitions. [2023-12-02 19:41:13,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-12-02 19:41:13,701 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:41:13,701 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:41:13,708 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba865e74-e779-4ddc-a377-40223b596663/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 19:41:13,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba865e74-e779-4ddc-a377-40223b596663/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:41:13,902 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:41:13,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:41:13,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1062008427, now seen corresponding path program 1 times [2023-12-02 19:41:13,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:41:13,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671187309] [2023-12-02 19:41:13,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:41:13,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:41:13,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:41:14,060 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 19:41:14,060 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:41:14,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671187309] [2023-12-02 19:41:14,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671187309] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:41:14,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652266480] [2023-12-02 19:41:14,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:41:14,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:41:14,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba865e74-e779-4ddc-a377-40223b596663/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:41:14,062 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba865e74-e779-4ddc-a377-40223b596663/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:41:14,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba865e74-e779-4ddc-a377-40223b596663/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 19:41:14,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:41:14,283 INFO L262 TraceCheckSpWp]: Trace formula consists of 825 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 19:41:14,288 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:41:14,329 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-12-02 19:41:14,330 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 19:41:14,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652266480] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:41:14,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 19:41:14,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 19:41:14,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011136784] [2023-12-02 19:41:14,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:41:14,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:41:14,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:41:14,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:41:14,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 19:41:14,332 INFO L87 Difference]: Start difference. First operand 2925 states and 4464 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 19:41:14,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:41:14,790 INFO L93 Difference]: Finished difference Result 8702 states and 13633 transitions. [2023-12-02 19:41:14,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:41:14,791 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 116 [2023-12-02 19:41:14,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:41:14,836 INFO L225 Difference]: With dead ends: 8702 [2023-12-02 19:41:14,836 INFO L226 Difference]: Without dead ends: 5783 [2023-12-02 19:41:14,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 19:41:14,853 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 212 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:41:14,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 391 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:41:14,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5783 states. [2023-12-02 19:41:15,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5783 to 5761. [2023-12-02 19:41:15,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5761 states, 4840 states have (on average 1.4520661157024792) internal successors, (7028), 4865 states have internal predecessors, (7028), 680 states have call successors, (680), 240 states have call predecessors, (680), 240 states have return successors, (1032), 656 states have call predecessors, (1032), 680 states have call successors, (1032) [2023-12-02 19:41:15,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5761 states to 5761 states and 8740 transitions. [2023-12-02 19:41:15,322 INFO L78 Accepts]: Start accepts. Automaton has 5761 states and 8740 transitions. Word has length 116 [2023-12-02 19:41:15,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:41:15,322 INFO L495 AbstractCegarLoop]: Abstraction has 5761 states and 8740 transitions. [2023-12-02 19:41:15,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 19:41:15,323 INFO L276 IsEmpty]: Start isEmpty. Operand 5761 states and 8740 transitions. [2023-12-02 19:41:15,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-12-02 19:41:15,335 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:41:15,335 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:41:15,343 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba865e74-e779-4ddc-a377-40223b596663/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 19:41:15,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba865e74-e779-4ddc-a377-40223b596663/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:41:15,536 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:41:15,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:41:15,536 INFO L85 PathProgramCache]: Analyzing trace with hash -818301161, now seen corresponding path program 1 times [2023-12-02 19:41:15,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:41:15,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272898321] [2023-12-02 19:41:15,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:41:15,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:41:15,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:41:15,721 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 19:41:15,722 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:41:15,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272898321] [2023-12-02 19:41:15,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272898321] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:41:15,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22815078] [2023-12-02 19:41:15,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:41:15,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:41:15,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba865e74-e779-4ddc-a377-40223b596663/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:41:15,723 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba865e74-e779-4ddc-a377-40223b596663/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:41:15,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba865e74-e779-4ddc-a377-40223b596663/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 19:41:15,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:41:15,932 INFO L262 TraceCheckSpWp]: Trace formula consists of 819 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 19:41:15,935 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:41:15,995 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-02 19:41:15,995 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 19:41:15,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22815078] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:41:15,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 19:41:15,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 19:41:15,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274613668] [2023-12-02 19:41:15,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:41:15,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:41:15,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:41:15,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:41:15,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 19:41:15,998 INFO L87 Difference]: Start difference. First operand 5761 states and 8740 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 19:41:16,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:41:16,809 INFO L93 Difference]: Finished difference Result 17150 states and 26685 transitions. [2023-12-02 19:41:16,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:41:16,810 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 116 [2023-12-02 19:41:16,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:41:16,897 INFO L225 Difference]: With dead ends: 17150 [2023-12-02 19:41:16,897 INFO L226 Difference]: Without dead ends: 11395 [2023-12-02 19:41:16,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 19:41:16,924 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 200 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:41:16,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 391 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:41:16,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11395 states. [2023-12-02 19:41:17,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11395 to 11353. [2023-12-02 19:41:17,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11353 states, 9556 states have (on average 1.4453746337379656) internal successors, (13812), 9605 states have internal predecessors, (13812), 1316 states have call successors, (1316), 480 states have call predecessors, (1316), 480 states have return successors, (1988), 1268 states have call predecessors, (1988), 1316 states have call successors, (1988) [2023-12-02 19:41:17,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11353 states to 11353 states and 17116 transitions. [2023-12-02 19:41:17,885 INFO L78 Accepts]: Start accepts. Automaton has 11353 states and 17116 transitions. Word has length 116 [2023-12-02 19:41:17,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:41:17,885 INFO L495 AbstractCegarLoop]: Abstraction has 11353 states and 17116 transitions. [2023-12-02 19:41:17,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 19:41:17,885 INFO L276 IsEmpty]: Start isEmpty. Operand 11353 states and 17116 transitions. [2023-12-02 19:41:17,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-12-02 19:41:17,906 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:41:17,906 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:41:17,913 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba865e74-e779-4ddc-a377-40223b596663/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 19:41:18,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba865e74-e779-4ddc-a377-40223b596663/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:41:18,108 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:41:18,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:41:18,108 INFO L85 PathProgramCache]: Analyzing trace with hash -934864999, now seen corresponding path program 1 times [2023-12-02 19:41:18,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:41:18,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133780617] [2023-12-02 19:41:18,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:41:18,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:41:18,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:41:18,214 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-12-02 19:41:18,214 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:41:18,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133780617] [2023-12-02 19:41:18,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133780617] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:41:18,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:41:18,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:41:18,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220292965] [2023-12-02 19:41:18,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:41:18,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:41:18,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:41:18,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:41:18,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:41:18,217 INFO L87 Difference]: Start difference. First operand 11353 states and 17116 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 19:41:18,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:41:18,983 INFO L93 Difference]: Finished difference Result 23163 states and 35661 transitions. [2023-12-02 19:41:18,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:41:18,984 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 116 [2023-12-02 19:41:18,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:41:19,049 INFO L225 Difference]: With dead ends: 23163 [2023-12-02 19:41:19,050 INFO L226 Difference]: Without dead ends: 14073 [2023-12-02 19:41:19,078 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 [2023-12-02 19:41:19,079 INFO L413 NwaCegarLoop]: 315 mSDtfsCounter, 110 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:41:19,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 525 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:41:19,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14073 states. [2023-12-02 19:41:19,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14073 to 13257. [2023-12-02 19:41:19,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13257 states, 11396 states have (on average 1.4717444717444716) internal successors, (16772), 11445 states have internal predecessors, (16772), 1348 states have call successors, (1348), 512 states have call predecessors, (1348), 512 states have return successors, (2020), 1300 states have call predecessors, (2020), 1348 states have call successors, (2020) [2023-12-02 19:41:19,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13257 states to 13257 states and 20140 transitions. [2023-12-02 19:41:19,781 INFO L78 Accepts]: Start accepts. Automaton has 13257 states and 20140 transitions. Word has length 116 [2023-12-02 19:41:19,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:41:19,782 INFO L495 AbstractCegarLoop]: Abstraction has 13257 states and 20140 transitions. [2023-12-02 19:41:19,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 19:41:19,783 INFO L276 IsEmpty]: Start isEmpty. Operand 13257 states and 20140 transitions. [2023-12-02 19:41:19,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-12-02 19:41:19,809 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:41:19,809 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:41:19,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-02 19:41:19,810 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:41:19,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:41:19,810 INFO L85 PathProgramCache]: Analyzing trace with hash 619911086, now seen corresponding path program 1 times [2023-12-02 19:41:19,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:41:19,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007952838] [2023-12-02 19:41:19,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:41:19,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:41:19,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:41:19,895 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2023-12-02 19:41:19,895 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:41:19,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007952838] [2023-12-02 19:41:19,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007952838] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:41:19,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:41:19,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:41:19,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551624340] [2023-12-02 19:41:19,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:41:19,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:41:19,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:41:19,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:41:19,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:41:19,898 INFO L87 Difference]: Start difference. First operand 13257 states and 20140 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 19:41:21,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:41:21,195 INFO L93 Difference]: Finished difference Result 39406 states and 61073 transitions. [2023-12-02 19:41:21,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:41:21,196 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 158 [2023-12-02 19:41:21,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:41:21,289 INFO L225 Difference]: With dead ends: 39406 [2023-12-02 19:41:21,289 INFO L226 Difference]: Without dead ends: 26155 [2023-12-02 19:41:21,321 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 [2023-12-02 19:41:21,322 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 203 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:41:21,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 393 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:41:21,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26155 states. [2023-12-02 19:41:22,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26155 to 26041. [2023-12-02 19:41:22,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26041 states, 22404 states have (on average 1.4627745045527585) internal successors, (32772), 22501 states have internal predecessors, (32772), 2612 states have call successors, (2612), 1024 states have call predecessors, (2612), 1024 states have return successors, (3892), 2516 states have call predecessors, (3892), 2612 states have call successors, (3892) [2023-12-02 19:41:22,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26041 states to 26041 states and 39276 transitions. [2023-12-02 19:41:22,899 INFO L78 Accepts]: Start accepts. Automaton has 26041 states and 39276 transitions. Word has length 158 [2023-12-02 19:41:22,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:41:22,900 INFO L495 AbstractCegarLoop]: Abstraction has 26041 states and 39276 transitions. [2023-12-02 19:41:22,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 19:41:22,900 INFO L276 IsEmpty]: Start isEmpty. Operand 26041 states and 39276 transitions. [2023-12-02 19:41:22,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-12-02 19:41:22,971 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:41:22,972 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:41:22,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-02 19:41:22,972 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:41:22,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:41:22,972 INFO L85 PathProgramCache]: Analyzing trace with hash -679574233, now seen corresponding path program 1 times [2023-12-02 19:41:22,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:41:22,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642744692] [2023-12-02 19:41:22,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:41:22,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:41:23,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:41:23,076 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2023-12-02 19:41:23,077 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:41:23,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642744692] [2023-12-02 19:41:23,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642744692] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:41:23,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:41:23,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:41:23,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794162343] [2023-12-02 19:41:23,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:41:23,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:41:23,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:41:23,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:41:23,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:41:23,079 INFO L87 Difference]: Start difference. First operand 26041 states and 39276 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 19:41:25,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:41:25,524 INFO L93 Difference]: Finished difference Result 77406 states and 119009 transitions. [2023-12-02 19:41:25,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:41:25,525 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 158 [2023-12-02 19:41:25,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:41:25,741 INFO L225 Difference]: With dead ends: 77406 [2023-12-02 19:41:25,741 INFO L226 Difference]: Without dead ends: 51371 [2023-12-02 19:41:25,787 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 [2023-12-02 19:41:25,788 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 205 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:41:25,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 393 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:41:25,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51371 states. [2023-12-02 19:41:28,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51371 to 51145. [2023-12-02 19:41:28,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51145 states, 44036 states have (on average 1.4534471795803434) internal successors, (64004), 44229 states have internal predecessors, (64004), 5060 states have call successors, (5060), 2048 states have call predecessors, (5060), 2048 states have return successors, (7492), 4868 states have call predecessors, (7492), 5060 states have call successors, (7492) [2023-12-02 19:41:28,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51145 states to 51145 states and 76556 transitions. [2023-12-02 19:41:28,456 INFO L78 Accepts]: Start accepts. Automaton has 51145 states and 76556 transitions. Word has length 158 [2023-12-02 19:41:28,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:41:28,456 INFO L495 AbstractCegarLoop]: Abstraction has 51145 states and 76556 transitions. [2023-12-02 19:41:28,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 19:41:28,457 INFO L276 IsEmpty]: Start isEmpty. Operand 51145 states and 76556 transitions. [2023-12-02 19:41:28,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-12-02 19:41:28,536 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:41:28,537 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:41:28,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-12-02 19:41:28,537 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:41:28,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:41:28,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1297760572, now seen corresponding path program 1 times [2023-12-02 19:41:28,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:41:28,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060564220] [2023-12-02 19:41:28,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:41:28,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:41:28,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:41:28,655 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2023-12-02 19:41:28,655 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:41:28,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060564220] [2023-12-02 19:41:28,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060564220] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:41:28,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:41:28,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:41:28,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093761831] [2023-12-02 19:41:28,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:41:28,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:41:28,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:41:28,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:41:28,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:41:28,657 INFO L87 Difference]: Start difference. First operand 51145 states and 76556 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 19:41:33,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:41:33,178 INFO L93 Difference]: Finished difference Result 152014 states and 231761 transitions. [2023-12-02 19:41:33,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:41:33,179 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 158 [2023-12-02 19:41:33,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:41:33,468 INFO L225 Difference]: With dead ends: 152014 [2023-12-02 19:41:33,468 INFO L226 Difference]: Without dead ends: 100875 [2023-12-02 19:41:33,564 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 [2023-12-02 19:41:33,565 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 207 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:41:33,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 393 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:41:33,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100875 states. [2023-12-02 19:41:37,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100875 to 100425. [2023-12-02 19:41:37,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100425 states, 86532 states have (on average 1.4437664678962696) internal successors, (124932), 86917 states have internal predecessors, (124932), 9796 states have call successors, (9796), 4096 states have call predecessors, (9796), 4096 states have return successors, (14404), 9412 states have call predecessors, (14404), 9796 states have call successors, (14404) [2023-12-02 19:41:38,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100425 states to 100425 states and 149132 transitions. [2023-12-02 19:41:38,433 INFO L78 Accepts]: Start accepts. Automaton has 100425 states and 149132 transitions. Word has length 158 [2023-12-02 19:41:38,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:41:38,434 INFO L495 AbstractCegarLoop]: Abstraction has 100425 states and 149132 transitions. [2023-12-02 19:41:38,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 19:41:38,435 INFO L276 IsEmpty]: Start isEmpty. Operand 100425 states and 149132 transitions. [2023-12-02 19:41:38,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-12-02 19:41:38,622 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:41:38,622 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:41:38,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-12-02 19:41:38,623 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:41:38,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:41:38,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1429114089, now seen corresponding path program 1 times [2023-12-02 19:41:38,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:41:38,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878380054] [2023-12-02 19:41:38,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:41:38,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:41:38,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:41:38,761 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2023-12-02 19:41:38,762 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:41:38,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878380054] [2023-12-02 19:41:38,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878380054] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:41:38,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:41:38,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:41:38,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579879555] [2023-12-02 19:41:38,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:41:38,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:41:38,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:41:38,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:41:38,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:41:38,764 INFO L87 Difference]: Start difference. First operand 100425 states and 149132 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 19:41:47,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:41:47,101 INFO L93 Difference]: Finished difference Result 298446 states and 451025 transitions. [2023-12-02 19:41:47,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:41:47,101 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 158 [2023-12-02 19:41:47,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:41:47,882 INFO L225 Difference]: With dead ends: 298446 [2023-12-02 19:41:47,882 INFO L226 Difference]: Without dead ends: 198027 [2023-12-02 19:41:48,133 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 [2023-12-02 19:41:48,134 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 210 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:41:48,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 397 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:41:48,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198027 states. [2023-12-02 19:41:56,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198027 to 197129. [2023-12-02 19:41:56,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197129 states, 169988 states have (on average 1.4337247335106007) internal successors, (243716), 170757 states have internal predecessors, (243716), 18948 states have call successors, (18948), 8192 states have call predecessors, (18948), 8192 states have return successors, (27652), 18180 states have call predecessors, (27652), 18948 states have call successors, (27652) [2023-12-02 19:41:57,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197129 states to 197129 states and 290316 transitions. [2023-12-02 19:41:57,495 INFO L78 Accepts]: Start accepts. Automaton has 197129 states and 290316 transitions. Word has length 158 [2023-12-02 19:41:57,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:41:57,495 INFO L495 AbstractCegarLoop]: Abstraction has 197129 states and 290316 transitions. [2023-12-02 19:41:57,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 19:41:57,495 INFO L276 IsEmpty]: Start isEmpty. Operand 197129 states and 290316 transitions. [2023-12-02 19:41:58,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2023-12-02 19:41:58,198 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:41:58,198 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:41:58,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-12-02 19:41:58,198 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:41:58,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:41:58,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1730418799, now seen corresponding path program 1 times [2023-12-02 19:41:58,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:41:58,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57101057] [2023-12-02 19:41:58,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:41:58,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:41:58,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:41:58,874 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 14 proven. 63 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-12-02 19:41:58,875 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:41:58,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57101057] [2023-12-02 19:41:58,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57101057] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:41:58,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492042979] [2023-12-02 19:41:58,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:41:58,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:41:58,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba865e74-e779-4ddc-a377-40223b596663/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:41:58,877 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba865e74-e779-4ddc-a377-40223b596663/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:41:58,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba865e74-e779-4ddc-a377-40223b596663/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 19:41:59,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:41:59,143 INFO L262 TraceCheckSpWp]: Trace formula consists of 1075 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 19:41:59,149 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:41:59,227 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-12-02 19:41:59,227 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 19:41:59,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492042979] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:41:59,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 19:41:59,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-02 19:41:59,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618846617] [2023-12-02 19:41:59,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:41:59,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:41:59,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:41:59,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:41:59,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 19:41:59,230 INFO L87 Difference]: Start difference. First operand 197129 states and 290316 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 19:42:08,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:42:08,219 INFO L93 Difference]: Finished difference Result 364036 states and 535553 transitions. [2023-12-02 19:42:08,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:42:08,220 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 182 [2023-12-02 19:42:08,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:42:09,087 INFO L225 Difference]: With dead ends: 364036 [2023-12-02 19:42:09,087 INFO L226 Difference]: Without dead ends: 248066 [2023-12-02 19:42:09,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 19:42:09,492 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 198 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:42:09,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 286 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:42:09,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248066 states. [2023-12-02 19:42:19,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248066 to 248066. [2023-12-02 19:42:19,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248066 states, 217090 states have (on average 1.3962227647519463) internal successors, (303106), 217859 states have internal predecessors, (303106), 20225 states have call successors, (20225), 10749 states have call predecessors, (20225), 10750 states have return successors, (29951), 19458 states have call predecessors, (29951), 20225 states have call successors, (29951) [2023-12-02 19:42:20,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248066 states to 248066 states and 353282 transitions. [2023-12-02 19:42:20,676 INFO L78 Accepts]: Start accepts. Automaton has 248066 states and 353282 transitions. Word has length 182 [2023-12-02 19:42:20,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:42:20,677 INFO L495 AbstractCegarLoop]: Abstraction has 248066 states and 353282 transitions. [2023-12-02 19:42:20,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 19:42:20,677 INFO L276 IsEmpty]: Start isEmpty. Operand 248066 states and 353282 transitions. [2023-12-02 19:42:21,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2023-12-02 19:42:21,385 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:42:21,385 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:42:21,391 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba865e74-e779-4ddc-a377-40223b596663/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 19:42:21,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba865e74-e779-4ddc-a377-40223b596663/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-02 19:42:21,586 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:42:21,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:42:21,586 INFO L85 PathProgramCache]: Analyzing trace with hash 856941104, now seen corresponding path program 1 times [2023-12-02 19:42:21,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:42:21,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584063889] [2023-12-02 19:42:21,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:42:21,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:42:21,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:42:22,025 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 14 proven. 65 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-12-02 19:42:22,026 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:42:22,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584063889] [2023-12-02 19:42:22,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584063889] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:42:22,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491207499] [2023-12-02 19:42:22,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:42:22,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:42:22,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba865e74-e779-4ddc-a377-40223b596663/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:42:22,027 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba865e74-e779-4ddc-a377-40223b596663/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:42:22,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba865e74-e779-4ddc-a377-40223b596663/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 19:42:22,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:42:22,276 INFO L262 TraceCheckSpWp]: Trace formula consists of 1072 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 19:42:22,280 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:42:22,313 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 19:42:22,313 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 19:42:22,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491207499] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:42:22,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 19:42:22,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-02 19:42:22,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282884534] [2023-12-02 19:42:22,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:42:22,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:42:22,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:42:22,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:42:22,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 19:42:22,316 INFO L87 Difference]: Start difference. First operand 248066 states and 353282 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 19:42:34,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:42:34,158 INFO L93 Difference]: Finished difference Result 480195 states and 691772 transitions. [2023-12-02 19:42:34,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:42:34,158 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 182 [2023-12-02 19:42:34,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:42:35,272 INFO L225 Difference]: With dead ends: 480195 [2023-12-02 19:42:35,272 INFO L226 Difference]: Without dead ends: 353985 [2023-12-02 19:42:35,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 19:42:35,508 INFO L413 NwaCegarLoop]: 360 mSDtfsCounter, 165 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:42:35,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 572 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:42:35,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353985 states. [2023-12-02 19:42:48,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353985 to 295170. [2023-12-02 19:42:48,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295170 states, 262402 states have (on average 1.4268260150456171) internal successors, (374402), 263171 states have internal predecessors, (374402), 21121 states have call successors, (21121), 11645 states have call predecessors, (21121), 11646 states have return successors, (30847), 20354 states have call predecessors, (30847), 21121 states have call successors, (30847) [2023-12-02 19:42:49,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295170 states to 295170 states and 426370 transitions. [2023-12-02 19:42:49,711 INFO L78 Accepts]: Start accepts. Automaton has 295170 states and 426370 transitions. Word has length 182 [2023-12-02 19:42:49,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:42:49,711 INFO L495 AbstractCegarLoop]: Abstraction has 295170 states and 426370 transitions. [2023-12-02 19:42:49,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 19:42:49,712 INFO L276 IsEmpty]: Start isEmpty. Operand 295170 states and 426370 transitions. [2023-12-02 19:42:50,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2023-12-02 19:42:50,171 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:42:50,172 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:42:50,178 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba865e74-e779-4ddc-a377-40223b596663/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 19:42:50,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba865e74-e779-4ddc-a377-40223b596663/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-02 19:42:50,372 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:42:50,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:42:50,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1085909265, now seen corresponding path program 2 times [2023-12-02 19:42:50,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:42:50,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093503327] [2023-12-02 19:42:50,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:42:50,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:42:50,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:42:50,969 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 10 proven. 62 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-12-02 19:42:50,969 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:42:50,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093503327] [2023-12-02 19:42:50,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093503327] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:42:50,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282482376] [2023-12-02 19:42:50,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 19:42:50,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:42:50,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba865e74-e779-4ddc-a377-40223b596663/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:42:50,970 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba865e74-e779-4ddc-a377-40223b596663/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:42:50,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba865e74-e779-4ddc-a377-40223b596663/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 19:42:51,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 19:42:51,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:42:51,174 INFO L262 TraceCheckSpWp]: Trace formula consists of 708 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 19:42:51,178 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:42:51,263 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 19:42:51,263 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 19:42:51,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282482376] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:42:51,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 19:42:51,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2023-12-02 19:42:51,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812384214] [2023-12-02 19:42:51,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:42:51,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 19:42:51,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:42:51,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 19:42:51,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-12-02 19:42:51,265 INFO L87 Difference]: Start difference. First operand 295170 states and 426370 transitions. Second operand has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-02 19:43:11,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:43:11,903 INFO L93 Difference]: Finished difference Result 875504 states and 1263719 transitions. [2023-12-02 19:43:11,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 19:43:11,904 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 182 [2023-12-02 19:43:11,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:43:13,702 INFO L225 Difference]: With dead ends: 875504 [2023-12-02 19:43:13,702 INFO L226 Difference]: Without dead ends: 580341 [2023-12-02 19:43:14,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-12-02 19:43:14,201 INFO L413 NwaCegarLoop]: 387 mSDtfsCounter, 193 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 968 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:43:14,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 968 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:43:14,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580341 states. [2023-12-02 19:43:36,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580341 to 579315. [2023-12-02 19:43:37,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579315 states, 514301 states have (on average 1.4168764983929645) internal successors, (728701), 515838 states have internal predecessors, (728701), 41724 states have call successors, (41724), 23288 states have call predecessors, (41724), 23289 states have return successors, (63222), 40189 states have call predecessors, (63222), 41724 states have call successors, (63222) [2023-12-02 19:43:39,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579315 states to 579315 states and 833647 transitions. [2023-12-02 19:43:39,802 INFO L78 Accepts]: Start accepts. Automaton has 579315 states and 833647 transitions. Word has length 182 [2023-12-02 19:43:39,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:43:39,802 INFO L495 AbstractCegarLoop]: Abstraction has 579315 states and 833647 transitions. [2023-12-02 19:43:39,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-02 19:43:39,802 INFO L276 IsEmpty]: Start isEmpty. Operand 579315 states and 833647 transitions. [2023-12-02 19:43:41,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2023-12-02 19:43:41,082 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:43:41,082 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:43:41,088 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba865e74-e779-4ddc-a377-40223b596663/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 19:43:41,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba865e74-e779-4ddc-a377-40223b596663/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-02 19:43:41,283 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:43:41,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:43:41,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1441505712, now seen corresponding path program 2 times [2023-12-02 19:43:41,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:43:41,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83188679] [2023-12-02 19:43:41,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:43:41,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:43:41,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:43:41,621 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 10 proven. 63 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-12-02 19:43:41,622 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:43:41,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83188679] [2023-12-02 19:43:41,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83188679] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:43:41,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107880009] [2023-12-02 19:43:41,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 19:43:41,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:43:41,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba865e74-e779-4ddc-a377-40223b596663/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:43:41,623 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba865e74-e779-4ddc-a377-40223b596663/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:43:41,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba865e74-e779-4ddc-a377-40223b596663/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 19:43:41,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 19:43:41,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:43:41,800 INFO L262 TraceCheckSpWp]: Trace formula consists of 705 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 19:43:41,804 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:43:41,845 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-12-02 19:43:41,845 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 19:43:41,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107880009] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:43:41,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 19:43:41,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-02 19:43:41,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682275420] [2023-12-02 19:43:41,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:43:41,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:43:41,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:43:41,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:43:41,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 19:43:41,847 INFO L87 Difference]: Start difference. First operand 579315 states and 833647 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10)