./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW --witnessprinter.witness.filename witness.graphml --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 6d6da8f3ee43e0b2f144002fad1e1be3bc4062b8e0f7b0d6768d1ce0f0c5101f --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 15:05:42,607 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 15:05:42,609 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 15:05:42,628 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 15:05:42,628 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 15:05:42,629 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 15:05:42,636 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 15:05:42,640 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 15:05:42,642 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 15:05:42,648 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 15:05:42,650 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 15:05:42,652 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 15:05:42,653 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 15:05:42,658 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 15:05:42,660 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 15:05:42,663 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 15:05:42,664 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 15:05:42,665 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 15:05:42,667 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 15:05:42,674 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 15:05:42,676 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 15:05:42,678 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 15:05:42,680 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 15:05:42,681 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 15:05:42,691 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 15:05:42,691 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 15:05:42,691 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 15:05:42,692 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 15:05:42,693 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 15:05:42,694 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 15:05:42,694 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 15:05:42,695 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 15:05:42,696 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 15:05:42,697 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 15:05:42,698 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 15:05:42,698 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 15:05:42,699 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 15:05:42,699 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 15:05:42,699 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 15:05:42,700 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 15:05:42,701 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 15:05:42,706 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 15:05:42,744 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 15:05:42,744 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 15:05:42,744 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 15:05:42,745 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 15:05:42,745 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 15:05:42,745 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 15:05:42,746 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 15:05:42,746 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 15:05:42,746 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 15:05:42,748 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 15:05:42,749 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 15:05:42,750 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 15:05:42,750 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 15:05:42,750 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 15:05:42,750 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 15:05:42,750 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 15:05:42,751 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 15:05:42,751 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 15:05:42,751 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 15:05:42,752 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 15:05:42,752 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 15:05:42,752 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 15:05:42,752 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 15:05:42,753 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 15:05:42,753 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 15:05:42,753 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 15:05:42,753 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 15:05:42,753 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 15:05:42,754 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 15:05:42,754 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 15:05:42,754 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 15:05:42,754 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 15:05:42,754 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:05:42,755 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 15:05:42,755 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 15:05:42,755 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 15:05:42,755 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 15:05:42,755 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 15:05:42,756 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 15:05:42,756 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 15:05:42,756 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 15:05:42,756 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6d6da8f3ee43e0b2f144002fad1e1be3bc4062b8e0f7b0d6768d1ce0f0c5101f [2022-11-23 15:05:43,072 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 15:05:43,093 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 15:05:43,096 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 15:05:43,097 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 15:05:43,098 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 15:05:43,099 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-1.c [2022-11-23 15:05:46,045 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 15:05:46,302 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 15:05:46,314 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-1.c [2022-11-23 15:05:46,336 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/data/416d225da/28a98801da75445ba2f0d196f45eadae/FLAG8ee262097 [2022-11-23 15:05:46,355 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/data/416d225da/28a98801da75445ba2f0d196f45eadae [2022-11-23 15:05:46,357 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 15:05:46,359 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 15:05:46,364 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 15:05:46,364 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 15:05:46,368 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 15:05:46,369 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:05:46" (1/1) ... [2022-11-23 15:05:46,370 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1405a61e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:05:46, skipping insertion in model container [2022-11-23 15:05:46,371 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:05:46" (1/1) ... [2022-11-23 15:05:46,379 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 15:05:46,442 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:05:46,665 WARN L237 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_90f559cd-183f-4ff0-a3f4-ee013ba96797/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-1.c[914,927] [2022-11-23 15:05:46,774 WARN L237 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_90f559cd-183f-4ff0-a3f4-ee013ba96797/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-1.c[7115,7128] [2022-11-23 15:05:46,911 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:05:46,923 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 15:05:46,935 WARN L237 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_90f559cd-183f-4ff0-a3f4-ee013ba96797/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-1.c[914,927] [2022-11-23 15:05:46,951 WARN L237 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_90f559cd-183f-4ff0-a3f4-ee013ba96797/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.10.cil-1.c[7115,7128] [2022-11-23 15:05:47,003 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:05:47,024 INFO L208 MainTranslator]: Completed translation [2022-11-23 15:05:47,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:05:47 WrapperNode [2022-11-23 15:05:47,024 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 15:05:47,025 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 15:05:47,026 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 15:05:47,026 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 15:05:47,033 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:05:47" (1/1) ... [2022-11-23 15:05:47,053 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:05:47" (1/1) ... [2022-11-23 15:05:47,107 INFO L138 Inliner]: procedures = 73, calls = 88, calls flagged for inlining = 41, calls inlined = 41, statements flattened = 929 [2022-11-23 15:05:47,107 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 15:05:47,108 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 15:05:47,108 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 15:05:47,108 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 15:05:47,123 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:05:47" (1/1) ... [2022-11-23 15:05:47,123 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:05:47" (1/1) ... [2022-11-23 15:05:47,128 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:05:47" (1/1) ... [2022-11-23 15:05:47,128 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:05:47" (1/1) ... [2022-11-23 15:05:47,142 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:05:47" (1/1) ... [2022-11-23 15:05:47,156 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:05:47" (1/1) ... [2022-11-23 15:05:47,161 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:05:47" (1/1) ... [2022-11-23 15:05:47,164 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:05:47" (1/1) ... [2022-11-23 15:05:47,170 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 15:05:47,171 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 15:05:47,171 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 15:05:47,172 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 15:05:47,173 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:05:47" (1/1) ... [2022-11-23 15:05:47,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:05:47,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:05:47,222 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 15:05:47,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 15:05:47,261 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 15:05:47,262 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-23 15:05:47,262 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-23 15:05:47,262 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-11-23 15:05:47,263 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-11-23 15:05:47,263 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-11-23 15:05:47,263 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-11-23 15:05:47,263 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-11-23 15:05:47,263 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-11-23 15:05:47,263 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-11-23 15:05:47,264 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-11-23 15:05:47,264 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-11-23 15:05:47,264 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-11-23 15:05:47,264 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-11-23 15:05:47,264 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-11-23 15:05:47,264 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-11-23 15:05:47,264 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-11-23 15:05:47,265 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-11-23 15:05:47,265 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-11-23 15:05:47,265 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-11-23 15:05:47,266 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-11-23 15:05:47,266 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-11-23 15:05:47,266 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-11-23 15:05:47,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 15:05:47,267 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-11-23 15:05:47,267 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-11-23 15:05:47,268 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-11-23 15:05:47,269 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-11-23 15:05:47,269 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 15:05:47,270 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 15:05:47,270 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-11-23 15:05:47,270 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-11-23 15:05:47,270 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-11-23 15:05:47,270 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-11-23 15:05:47,424 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 15:05:47,426 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 15:05:48,526 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 15:05:49,060 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 15:05:49,060 INFO L300 CfgBuilder]: Removed 17 assume(true) statements. [2022-11-23 15:05:49,063 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:05:49 BoogieIcfgContainer [2022-11-23 15:05:49,063 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 15:05:49,066 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 15:05:49,066 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 15:05:49,069 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 15:05:49,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:05:46" (1/3) ... [2022-11-23 15:05:49,070 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28256174 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:05:49, skipping insertion in model container [2022-11-23 15:05:49,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:05:47" (2/3) ... [2022-11-23 15:05:49,071 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28256174 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:05:49, skipping insertion in model container [2022-11-23 15:05:49,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:05:49" (3/3) ... [2022-11-23 15:05:49,072 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.10.cil-1.c [2022-11-23 15:05:49,126 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 15:05:49,126 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-23 15:05:49,183 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:05:49,190 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=LoopsAndPotentialCycles, 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;@5daddec2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:05:49,190 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-23 15:05:49,196 INFO L276 IsEmpty]: Start isEmpty. Operand has 244 states, 186 states have (on average 1.543010752688172) internal successors, (287), 194 states have internal predecessors, (287), 40 states have call successors, (40), 15 states have call predecessors, (40), 15 states have return successors, (40), 38 states have call predecessors, (40), 40 states have call successors, (40) [2022-11-23 15:05:49,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-23 15:05:49,207 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:05:49,208 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] [2022-11-23 15:05:49,209 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:05:49,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:05:49,214 INFO L85 PathProgramCache]: Analyzing trace with hash -2056545197, now seen corresponding path program 1 times [2022-11-23 15:05:49,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:05:49,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669027913] [2022-11-23 15:05:49,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:05:49,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:05:49,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:05:49,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:05:49,638 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:05:49,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669027913] [2022-11-23 15:05:49,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669027913] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:05:49,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:05:49,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:05:49,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520832166] [2022-11-23 15:05:49,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:05:49,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:05:49,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:05:49,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:05:49,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:05:49,700 INFO L87 Difference]: Start difference. First operand has 244 states, 186 states have (on average 1.543010752688172) internal successors, (287), 194 states have internal predecessors, (287), 40 states have call successors, (40), 15 states have call predecessors, (40), 15 states have return successors, (40), 38 states have call predecessors, (40), 40 states have call successors, (40) Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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) [2022-11-23 15:05:50,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:05:50,254 INFO L93 Difference]: Finished difference Result 538 states and 805 transitions. [2022-11-23 15:05:50,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:05:50,256 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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 45 [2022-11-23 15:05:50,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:05:50,277 INFO L225 Difference]: With dead ends: 538 [2022-11-23 15:05:50,277 INFO L226 Difference]: Without dead ends: 298 [2022-11-23 15:05:50,286 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 [2022-11-23 15:05:50,290 INFO L413 NwaCegarLoop]: 350 mSDtfsCounter, 413 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 15:05:50,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [413 Valid, 604 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 15:05:50,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-11-23 15:05:50,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 291. [2022-11-23 15:05:50,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 221 states have (on average 1.4479638009049773) internal successors, (320), 226 states have internal predecessors, (320), 48 states have call successors, (48), 22 states have call predecessors, (48), 20 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-11-23 15:05:50,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 412 transitions. [2022-11-23 15:05:50,373 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 412 transitions. Word has length 45 [2022-11-23 15:05:50,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:05:50,374 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 412 transitions. [2022-11-23 15:05:50,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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) [2022-11-23 15:05:50,374 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 412 transitions. [2022-11-23 15:05:50,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-23 15:05:50,377 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:05:50,377 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] [2022-11-23 15:05:50,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 15:05:50,378 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:05:50,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:05:50,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1137570574, now seen corresponding path program 1 times [2022-11-23 15:05:50,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:05:50,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105202781] [2022-11-23 15:05:50,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:05:50,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:05:50,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:05:50,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:05:50,638 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:05:50,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105202781] [2022-11-23 15:05:50,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105202781] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:05:50,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:05:50,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-23 15:05:50,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021627203] [2022-11-23 15:05:50,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:05:50,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 15:05:50,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:05:50,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 15:05:50,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:05:50,642 INFO L87 Difference]: Start difference. First operand 291 states and 412 transitions. Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-23 15:05:51,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:05:51,636 INFO L93 Difference]: Finished difference Result 472 states and 633 transitions. [2022-11-23 15:05:51,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-23 15:05:51,637 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2022-11-23 15:05:51,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:05:51,644 INFO L225 Difference]: With dead ends: 472 [2022-11-23 15:05:51,644 INFO L226 Difference]: Without dead ends: 356 [2022-11-23 15:05:51,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-23 15:05:51,650 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 504 mSDsluCounter, 700 mSDsCounter, 0 mSdLazyCounter, 927 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 897 SdHoareTripleChecker+Invalid, 1031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-23 15:05:51,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [533 Valid, 897 Invalid, 1031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 927 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-23 15:05:51,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2022-11-23 15:05:51,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 343. [2022-11-23 15:05:51,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 258 states have (on average 1.4224806201550388) internal successors, (367), 263 states have internal predecessors, (367), 56 states have call successors, (56), 29 states have call predecessors, (56), 27 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2022-11-23 15:05:51,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 475 transitions. [2022-11-23 15:05:51,701 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 475 transitions. Word has length 45 [2022-11-23 15:05:51,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:05:51,702 INFO L495 AbstractCegarLoop]: Abstraction has 343 states and 475 transitions. [2022-11-23 15:05:51,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-23 15:05:51,702 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 475 transitions. [2022-11-23 15:05:51,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-23 15:05:51,710 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:05:51,710 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] [2022-11-23 15:05:51,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 15:05:51,710 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:05:51,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:05:51,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1878793210, now seen corresponding path program 1 times [2022-11-23 15:05:51,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:05:51,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475421877] [2022-11-23 15:05:51,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:05:51,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:05:51,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:05:51,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:05:51,773 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:05:51,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475421877] [2022-11-23 15:05:51,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475421877] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:05:51,774 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:05:51,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:05:51,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153022660] [2022-11-23 15:05:51,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:05:51,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:05:51,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:05:51,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:05:51,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:05:51,776 INFO L87 Difference]: Start difference. First operand 343 states and 475 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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) [2022-11-23 15:05:51,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:05:51,932 INFO L93 Difference]: Finished difference Result 671 states and 881 transitions. [2022-11-23 15:05:51,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:05:51,933 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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 46 [2022-11-23 15:05:51,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:05:51,936 INFO L225 Difference]: With dead ends: 671 [2022-11-23 15:05:51,937 INFO L226 Difference]: Without dead ends: 502 [2022-11-23 15:05:51,938 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 [2022-11-23 15:05:51,939 INFO L413 NwaCegarLoop]: 298 mSDtfsCounter, 324 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:05:51,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 360 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:05:51,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2022-11-23 15:05:51,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 483. [2022-11-23 15:05:51,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 353 states have (on average 1.3512747875354107) internal successors, (477), 358 states have internal predecessors, (477), 80 states have call successors, (80), 50 states have call predecessors, (80), 48 states have return successors, (76), 76 states have call predecessors, (76), 76 states have call successors, (76) [2022-11-23 15:05:51,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 633 transitions. [2022-11-23 15:05:51,985 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 633 transitions. Word has length 46 [2022-11-23 15:05:51,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:05:51,985 INFO L495 AbstractCegarLoop]: Abstraction has 483 states and 633 transitions. [2022-11-23 15:05:51,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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) [2022-11-23 15:05:51,986 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 633 transitions. [2022-11-23 15:05:51,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-23 15:05:51,987 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:05:51,989 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] [2022-11-23 15:05:51,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 15:05:51,989 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:05:51,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:05:51,990 INFO L85 PathProgramCache]: Analyzing trace with hash 285230048, now seen corresponding path program 1 times [2022-11-23 15:05:51,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:05:51,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049010233] [2022-11-23 15:05:51,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:05:51,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:05:52,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:05:52,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:05:52,125 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:05:52,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049010233] [2022-11-23 15:05:52,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049010233] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:05:52,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:05:52,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:05:52,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318635124] [2022-11-23 15:05:52,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:05:52,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:05:52,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:05:52,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:05:52,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:05:52,128 INFO L87 Difference]: Start difference. First operand 483 states and 633 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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) [2022-11-23 15:05:52,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:05:52,291 INFO L93 Difference]: Finished difference Result 853 states and 1078 transitions. [2022-11-23 15:05:52,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:05:52,292 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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 47 [2022-11-23 15:05:52,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:05:52,297 INFO L225 Difference]: With dead ends: 853 [2022-11-23 15:05:52,298 INFO L226 Difference]: Without dead ends: 590 [2022-11-23 15:05:52,299 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 [2022-11-23 15:05:52,308 INFO L413 NwaCegarLoop]: 305 mSDtfsCounter, 67 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:05:52,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 573 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:05:52,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2022-11-23 15:05:52,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 584. [2022-11-23 15:05:52,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 424 states have (on average 1.3325471698113207) internal successors, (565), 429 states have internal predecessors, (565), 96 states have call successors, (96), 64 states have call predecessors, (96), 62 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2022-11-23 15:05:52,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 753 transitions. [2022-11-23 15:05:52,364 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 753 transitions. Word has length 47 [2022-11-23 15:05:52,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:05:52,365 INFO L495 AbstractCegarLoop]: Abstraction has 584 states and 753 transitions. [2022-11-23 15:05:52,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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) [2022-11-23 15:05:52,365 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 753 transitions. [2022-11-23 15:05:52,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-23 15:05:52,367 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:05:52,367 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:05:52,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 15:05:52,367 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:05:52,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:05:52,368 INFO L85 PathProgramCache]: Analyzing trace with hash -744302, now seen corresponding path program 1 times [2022-11-23 15:05:52,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:05:52,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447060244] [2022-11-23 15:05:52,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:05:52,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:05:52,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:05:52,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:05:52,454 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:05:52,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447060244] [2022-11-23 15:05:52,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447060244] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:05:52,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:05:52,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:05:52,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760782735] [2022-11-23 15:05:52,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:05:52,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:05:52,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:05:52,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:05:52,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:05:52,457 INFO L87 Difference]: Start difference. First operand 584 states and 753 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-23 15:05:52,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:05:52,769 INFO L93 Difference]: Finished difference Result 691 states and 879 transitions. [2022-11-23 15:05:52,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:05:52,770 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 54 [2022-11-23 15:05:52,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:05:52,774 INFO L225 Difference]: With dead ends: 691 [2022-11-23 15:05:52,774 INFO L226 Difference]: Without dead ends: 688 [2022-11-23 15:05:52,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:05:52,776 INFO L413 NwaCegarLoop]: 302 mSDtfsCounter, 580 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 580 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:05:52,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [580 Valid, 343 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:05:52,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2022-11-23 15:05:52,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 583. [2022-11-23 15:05:52,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 424 states have (on average 1.3254716981132075) internal successors, (562), 428 states have internal predecessors, (562), 95 states have call successors, (95), 64 states have call predecessors, (95), 62 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2022-11-23 15:05:52,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 749 transitions. [2022-11-23 15:05:52,856 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 749 transitions. Word has length 54 [2022-11-23 15:05:52,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:05:52,857 INFO L495 AbstractCegarLoop]: Abstraction has 583 states and 749 transitions. [2022-11-23 15:05:52,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-23 15:05:52,857 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 749 transitions. [2022-11-23 15:05:52,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-23 15:05:52,858 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:05:52,858 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:05:52,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 15:05:52,859 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:05:52,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:05:52,859 INFO L85 PathProgramCache]: Analyzing trace with hash -24388151, now seen corresponding path program 1 times [2022-11-23 15:05:52,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:05:52,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82030813] [2022-11-23 15:05:52,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:05:52,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:05:52,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:05:53,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:05:53,004 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:05:53,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82030813] [2022-11-23 15:05:53,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82030813] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:05:53,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038949729] [2022-11-23 15:05:53,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:05:53,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:05:53,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:05:53,010 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:05:53,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 15:05:53,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:05:53,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 15:05:53,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:05:53,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:05:53,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:05:53,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:05:53,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038949729] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:05:53,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [894972724] [2022-11-23 15:05:53,864 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2022-11-23 15:05:53,864 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:05:53,868 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:05:53,873 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:05:53,874 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:05:58,863 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 185 for LOIs [2022-11-23 15:05:58,902 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 181 for LOIs [2022-11-23 15:05:58,935 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 189 for LOIs [2022-11-23 15:05:59,768 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 185 for LOIs [2022-11-23 15:05:59,858 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 185 for LOIs [2022-11-23 15:05:59,958 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 185 for LOIs [2022-11-23 15:05:59,995 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 192 for LOIs [2022-11-23 15:06:00,029 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:06:23,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [894972724] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:06:23,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:06:23,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [5, 5, 4] total 41 [2022-11-23 15:06:23,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839638796] [2022-11-23 15:06:23,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:06:23,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-23 15:06:23,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:06:23,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-23 15:06:23,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1447, Unknown=0, NotChecked=0, Total=1640 [2022-11-23 15:06:23,087 INFO L87 Difference]: Start difference. First operand 583 states and 749 transitions. Second operand has 36 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-23 15:06:59,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:06:59,520 INFO L93 Difference]: Finished difference Result 1040 states and 1282 transitions. [2022-11-23 15:06:59,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-23 15:06:59,521 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 55 [2022-11-23 15:06:59,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:06:59,527 INFO L225 Difference]: With dead ends: 1040 [2022-11-23 15:06:59,527 INFO L226 Difference]: Without dead ends: 632 [2022-11-23 15:06:59,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 124 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1431 ImplicationChecksByTransitivity, 49.5s TimeCoverageRelationStatistics Valid=601, Invalid=4091, Unknown=0, NotChecked=0, Total=4692 [2022-11-23 15:06:59,531 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 177 mSDsluCounter, 1956 mSDsCounter, 0 mSdLazyCounter, 4615 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 2228 SdHoareTripleChecker+Invalid, 4795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 4615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2022-11-23 15:06:59,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 2228 Invalid, 4795 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [180 Valid, 4615 Invalid, 0 Unknown, 0 Unchecked, 9.7s Time] [2022-11-23 15:06:59,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2022-11-23 15:06:59,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 617. [2022-11-23 15:06:59,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 450 states have (on average 1.3111111111111111) internal successors, (590), 454 states have internal predecessors, (590), 97 states have call successors, (97), 70 states have call predecessors, (97), 68 states have return successors, (94), 94 states have call predecessors, (94), 94 states have call successors, (94) [2022-11-23 15:06:59,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 781 transitions. [2022-11-23 15:06:59,623 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 781 transitions. Word has length 55 [2022-11-23 15:06:59,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:06:59,623 INFO L495 AbstractCegarLoop]: Abstraction has 617 states and 781 transitions. [2022-11-23 15:06:59,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-23 15:06:59,624 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 781 transitions. [2022-11-23 15:06:59,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-23 15:06:59,625 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:06:59,626 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-23 15:06:59,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 15:06:59,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-23 15:06:59,833 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:06:59,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:06:59,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1583555132, now seen corresponding path program 1 times [2022-11-23 15:06:59,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:06:59,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866427099] [2022-11-23 15:06:59,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:06:59,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:06:59,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:06:59,926 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 15:06:59,926 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:06:59,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866427099] [2022-11-23 15:06:59,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866427099] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:06:59,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:06:59,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:06:59,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005513281] [2022-11-23 15:06:59,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:06:59,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:06:59,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:06:59,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:06:59,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:06:59,939 INFO L87 Difference]: Start difference. First operand 617 states and 781 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-23 15:07:00,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:07:00,161 INFO L93 Difference]: Finished difference Result 1064 states and 1317 transitions. [2022-11-23 15:07:00,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:07:00,162 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 61 [2022-11-23 15:07:00,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:07:00,166 INFO L225 Difference]: With dead ends: 1064 [2022-11-23 15:07:00,166 INFO L226 Difference]: Without dead ends: 798 [2022-11-23 15:07:00,167 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 [2022-11-23 15:07:00,168 INFO L413 NwaCegarLoop]: 330 mSDtfsCounter, 43 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:07:00,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 616 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:07:00,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2022-11-23 15:07:00,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 669. [2022-11-23 15:07:00,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 492 states have (on average 1.306910569105691) internal successors, (643), 496 states have internal predecessors, (643), 102 states have call successors, (102), 75 states have call predecessors, (102), 73 states have return successors, (99), 99 states have call predecessors, (99), 99 states have call successors, (99) [2022-11-23 15:07:00,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 844 transitions. [2022-11-23 15:07:00,257 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 844 transitions. Word has length 61 [2022-11-23 15:07:00,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:07:00,258 INFO L495 AbstractCegarLoop]: Abstraction has 669 states and 844 transitions. [2022-11-23 15:07:00,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-23 15:07:00,258 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 844 transitions. [2022-11-23 15:07:00,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-23 15:07:00,260 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:07:00,260 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2022-11-23 15:07:00,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 15:07:00,260 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:07:00,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:07:00,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1147165906, now seen corresponding path program 1 times [2022-11-23 15:07:00,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:07:00,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918367713] [2022-11-23 15:07:00,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:07:00,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:07:00,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:07:00,423 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 15:07:00,423 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:07:00,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918367713] [2022-11-23 15:07:00,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918367713] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:07:00,424 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:07:00,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-23 15:07:00,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4457443] [2022-11-23 15:07:00,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:07:00,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 15:07:00,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:07:00,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 15:07:00,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:07:00,426 INFO L87 Difference]: Start difference. First operand 669 states and 844 transitions. Second operand has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-23 15:07:01,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:07:01,332 INFO L93 Difference]: Finished difference Result 1343 states and 1631 transitions. [2022-11-23 15:07:01,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-23 15:07:01,334 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 63 [2022-11-23 15:07:01,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:07:01,339 INFO L225 Difference]: With dead ends: 1343 [2022-11-23 15:07:01,339 INFO L226 Difference]: Without dead ends: 930 [2022-11-23 15:07:01,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-23 15:07:01,341 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 487 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 911 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 516 SdHoareTripleChecker+Valid, 861 SdHoareTripleChecker+Invalid, 1019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-23 15:07:01,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [516 Valid, 861 Invalid, 1019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 911 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-23 15:07:01,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2022-11-23 15:07:01,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 895. [2022-11-23 15:07:01,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 643 states have (on average 1.2690513219284603) internal successors, (816), 647 states have internal predecessors, (816), 142 states have call successors, (142), 110 states have call predecessors, (142), 108 states have return successors, (139), 139 states have call predecessors, (139), 139 states have call successors, (139) [2022-11-23 15:07:01,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 1097 transitions. [2022-11-23 15:07:01,457 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 1097 transitions. Word has length 63 [2022-11-23 15:07:01,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:07:01,458 INFO L495 AbstractCegarLoop]: Abstraction has 895 states and 1097 transitions. [2022-11-23 15:07:01,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-23 15:07:01,458 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 1097 transitions. [2022-11-23 15:07:01,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-23 15:07:01,459 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:07:01,460 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1] [2022-11-23 15:07:01,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 15:07:01,460 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:07:01,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:07:01,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1355355487, now seen corresponding path program 1 times [2022-11-23 15:07:01,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:07:01,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037799021] [2022-11-23 15:07:01,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:07:01,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:07:01,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:07:01,588 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 15:07:01,588 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:07:01,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037799021] [2022-11-23 15:07:01,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037799021] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:07:01,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865415044] [2022-11-23 15:07:01,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:07:01,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:07:01,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:07:01,591 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:07:01,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 15:07:01,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:07:01,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 15:07:01,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:07:01,974 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 15:07:01,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:07:02,143 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 15:07:02,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865415044] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:07:02,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1197765587] [2022-11-23 15:07:02,149 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2022-11-23 15:07:02,149 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:07:02,150 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:07:02,150 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:07:02,150 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:07:18,329 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 185 for LOIs [2022-11-23 15:07:18,353 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 283 for LOIs [2022-11-23 15:07:18,446 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 277 for LOIs [2022-11-23 15:07:18,552 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 189 for LOIs [2022-11-23 15:07:19,039 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 185 for LOIs [2022-11-23 15:07:19,097 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 185 for LOIs [2022-11-23 15:07:19,160 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 185 for LOIs [2022-11-23 15:07:19,184 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 192 for LOIs [2022-11-23 15:07:19,207 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:08:00,274 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17395#(and (= ~q_req_up~0 1) (= ~T6_E~0 2) (= ~t6_i~0 0) (= 0 ~t5_pc~0) (= ~t10_i~0 0) (= ~t7_i~0 0) (= 0 ~t8_pc~0) (= ~T4_E~0 2) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (<= 0 ~p_dw_pc~0) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (<= ~t7_pc~0 0) (= 0 ~t6_st~0) (<= ~t1_pc~0 0) (<= ~t8_i~0 0) (<= 2 ~M_E~0) (<= ~T9_E~0 2) (= ~t9_i~0 0) (<= |#NULL.offset| 0) (= ~t4_i~0 0) (<= 0 ~t9_st~0) (<= 0 ~t10_st~0) (<= ~t5_i~0 0) (<= 2 ~T8_E~0) (= ~T7_E~0 2) (<= 2 ~E_9~0) (<= 2 ~E_6~0) (= ~m_i~0 0) (<= ~t2_i~0 0) (<= 2 ~E_8~0) (<= ~t8_st~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (<= ~E_4~0 2) (<= 2 ~E_7~0) (<= ~t10_pc~0 0) (<= ~t9_pc~0 0) (<= 0 ~t5_i~0) (<= 0 ~t8_st~0) (<= ~t9_st~0 0) (= ~E_2~0 2) (<= ~T8_E~0 2) (<= ~E_6~0 2) (<= ~E_10~0 2) (<= 0 ~t2_i~0) (= ~c_last_read~0 ~q_buf_0~0) (<= ~t3_st~0 0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (<= ~c_num_read~0 1) (= ~token~0 0) (<= 0 ~t3_st~0) (<= ~m_pc~0 0) (<= 0 ~t10_pc~0) (= ~c_dr_pc~0 0) (<= 2 ~E_4~0) (= ~T10_E~0 2) (= ~p_dw_i~0 1) (<= 2 ~E_10~0) (= 0 ~t2_pc~0) (<= ~M_E~0 2) (<= ~E_5~0 2) (<= ~m_st~0 0) (<= ~t3_pc~0 0) (= ~c_last_read~0 ~p_last_write~0) (<= 0 ~m_pc~0) (<= 2 ~T9_E~0) (= ~E_M~0 2) (= ~a_t~0 0) (<= 0 ~t3_pc~0) (<= 0 ~t7_pc~0) (= 0 ~t2_st~0) (<= ~E_8~0 2) (<= 0 ~t9_pc~0) (<= 2 ~E_5~0) (<= 0 ~t8_i~0) (<= 1 ~c_num_read~0) (<= 0 ~m_st~0) (<= 0 |#NULL.offset|) (<= ~t4_pc~0 0) (= ~E_1~0 2) (<= 0 ~t4_pc~0) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (= ~c_dr_st~0 1) (<= 0 ~t1_st~0) (<= ~E_7~0 2) (<= ~t10_st~0 0) (<= ~E_9~0 2) (<= 0 ~t1_pc~0) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-23 15:08:00,275 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:08:00,275 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:08:00,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-11-23 15:08:00,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309333982] [2022-11-23 15:08:00,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:08:00,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 15:08:00,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:08:00,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 15:08:00,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1924, Unknown=0, NotChecked=0, Total=2162 [2022-11-23 15:08:00,277 INFO L87 Difference]: Start difference. First operand 895 states and 1097 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2022-11-23 15:08:01,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:08:01,076 INFO L93 Difference]: Finished difference Result 2401 states and 2860 transitions. [2022-11-23 15:08:01,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 15:08:01,077 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) Word has length 64 [2022-11-23 15:08:01,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:08:01,088 INFO L225 Difference]: With dead ends: 2401 [2022-11-23 15:08:01,088 INFO L226 Difference]: Without dead ends: 2398 [2022-11-23 15:08:01,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 144 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1043 ImplicationChecksByTransitivity, 41.1s TimeCoverageRelationStatistics Valid=238, Invalid=1924, Unknown=0, NotChecked=0, Total=2162 [2022-11-23 15:08:01,091 INFO L413 NwaCegarLoop]: 411 mSDtfsCounter, 612 mSDsluCounter, 648 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 612 SdHoareTripleChecker+Valid, 1059 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:08:01,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [612 Valid, 1059 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 15:08:01,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2398 states. [2022-11-23 15:08:01,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2398 to 1618. [2022-11-23 15:08:01,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1618 states, 1144 states have (on average 1.2482517482517483) internal successors, (1428), 1148 states have internal predecessors, (1428), 260 states have call successors, (260), 214 states have call predecessors, (260), 212 states have return successors, (257), 257 states have call predecessors, (257), 257 states have call successors, (257) [2022-11-23 15:08:01,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1618 states to 1618 states and 1945 transitions. [2022-11-23 15:08:01,336 INFO L78 Accepts]: Start accepts. Automaton has 1618 states and 1945 transitions. Word has length 64 [2022-11-23 15:08:01,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:08:01,336 INFO L495 AbstractCegarLoop]: Abstraction has 1618 states and 1945 transitions. [2022-11-23 15:08:01,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2022-11-23 15:08:01,337 INFO L276 IsEmpty]: Start isEmpty. Operand 1618 states and 1945 transitions. [2022-11-23 15:08:01,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-23 15:08:01,338 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:08:01,338 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, 1, 1, 1, 1] [2022-11-23 15:08:01,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 15:08:01,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:08:01,560 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:08:01,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:08:01,561 INFO L85 PathProgramCache]: Analyzing trace with hash 2103674152, now seen corresponding path program 1 times [2022-11-23 15:08:01,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:08:01,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471357989] [2022-11-23 15:08:01,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:08:01,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:08:01,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:08:01,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:08:01,692 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:08:01,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471357989] [2022-11-23 15:08:01,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471357989] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:08:01,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:08:01,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:08:01,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086015335] [2022-11-23 15:08:01,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:08:01,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:08:01,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:08:01,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:08:01,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:08:01,695 INFO L87 Difference]: Start difference. First operand 1618 states and 1945 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 15:08:02,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:08:02,950 INFO L93 Difference]: Finished difference Result 2396 states and 3226 transitions. [2022-11-23 15:08:02,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:08:02,951 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 62 [2022-11-23 15:08:02,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:08:02,966 INFO L225 Difference]: With dead ends: 2396 [2022-11-23 15:08:02,966 INFO L226 Difference]: Without dead ends: 2232 [2022-11-23 15:08:02,968 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 [2022-11-23 15:08:02,969 INFO L413 NwaCegarLoop]: 554 mSDtfsCounter, 1273 mSDsluCounter, 755 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1288 SdHoareTripleChecker+Valid, 1309 SdHoareTripleChecker+Invalid, 875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-23 15:08:02,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1288 Valid, 1309 Invalid, 875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-23 15:08:02,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2232 states. [2022-11-23 15:08:03,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2232 to 2219. [2022-11-23 15:08:03,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2219 states, 1644 states have (on average 1.3309002433090025) internal successors, (2188), 1651 states have internal predecessors, (2188), 337 states have call successors, (337), 238 states have call predecessors, (337), 236 states have return successors, (388), 331 states have call predecessors, (388), 334 states have call successors, (388) [2022-11-23 15:08:03,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2219 states to 2219 states and 2913 transitions. [2022-11-23 15:08:03,296 INFO L78 Accepts]: Start accepts. Automaton has 2219 states and 2913 transitions. Word has length 62 [2022-11-23 15:08:03,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:08:03,296 INFO L495 AbstractCegarLoop]: Abstraction has 2219 states and 2913 transitions. [2022-11-23 15:08:03,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 15:08:03,296 INFO L276 IsEmpty]: Start isEmpty. Operand 2219 states and 2913 transitions. [2022-11-23 15:08:03,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-23 15:08:03,305 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:08:03,305 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 1] [2022-11-23 15:08:03,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-23 15:08:03,305 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:08:03,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:08:03,306 INFO L85 PathProgramCache]: Analyzing trace with hash 271636598, now seen corresponding path program 2 times [2022-11-23 15:08:03,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:08:03,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174075670] [2022-11-23 15:08:03,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:08:03,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:08:03,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:08:03,346 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 15:08:03,346 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:08:03,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174075670] [2022-11-23 15:08:03,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174075670] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:08:03,347 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:08:03,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:08:03,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155741824] [2022-11-23 15:08:03,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:08:03,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:08:03,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:08:03,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:08:03,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:08:03,349 INFO L87 Difference]: Start difference. First operand 2219 states and 2913 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-23 15:08:03,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:08:03,685 INFO L93 Difference]: Finished difference Result 2975 states and 3799 transitions. [2022-11-23 15:08:03,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:08:03,686 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 67 [2022-11-23 15:08:03,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:08:03,695 INFO L225 Difference]: With dead ends: 2975 [2022-11-23 15:08:03,696 INFO L226 Difference]: Without dead ends: 1809 [2022-11-23 15:08:03,699 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 [2022-11-23 15:08:03,700 INFO L413 NwaCegarLoop]: 334 mSDtfsCounter, 322 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:08:03,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [322 Valid, 401 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:08:03,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1809 states. [2022-11-23 15:08:03,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1809 to 1802. [2022-11-23 15:08:03,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1802 states, 1355 states have (on average 1.3431734317343174) internal successors, (1820), 1362 states have internal predecessors, (1820), 269 states have call successors, (269), 178 states have call predecessors, (269), 176 states have return successors, (320), 263 states have call predecessors, (320), 266 states have call successors, (320) [2022-11-23 15:08:03,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1802 states to 1802 states and 2409 transitions. [2022-11-23 15:08:03,985 INFO L78 Accepts]: Start accepts. Automaton has 1802 states and 2409 transitions. Word has length 67 [2022-11-23 15:08:03,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:08:03,985 INFO L495 AbstractCegarLoop]: Abstraction has 1802 states and 2409 transitions. [2022-11-23 15:08:03,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-23 15:08:03,986 INFO L276 IsEmpty]: Start isEmpty. Operand 1802 states and 2409 transitions. [2022-11-23 15:08:03,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-23 15:08:03,988 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:08:03,988 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-23 15:08:03,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-23 15:08:03,989 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:08:03,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:08:03,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1550049628, now seen corresponding path program 1 times [2022-11-23 15:08:03,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:08:03,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595003112] [2022-11-23 15:08:03,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:08:03,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:08:04,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:08:04,038 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 15:08:04,038 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:08:04,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595003112] [2022-11-23 15:08:04,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595003112] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:08:04,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:08:04,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:08:04,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649531855] [2022-11-23 15:08:04,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:08:04,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:08:04,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:08:04,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:08:04,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:08:04,041 INFO L87 Difference]: Start difference. First operand 1802 states and 2409 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-23 15:08:04,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:08:04,419 INFO L93 Difference]: Finished difference Result 2774 states and 3537 transitions. [2022-11-23 15:08:04,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:08:04,420 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 71 [2022-11-23 15:08:04,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:08:04,430 INFO L225 Difference]: With dead ends: 2774 [2022-11-23 15:08:04,430 INFO L226 Difference]: Without dead ends: 1978 [2022-11-23 15:08:04,433 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 [2022-11-23 15:08:04,434 INFO L413 NwaCegarLoop]: 321 mSDtfsCounter, 38 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:08:04,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 607 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:08:04,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1978 states. [2022-11-23 15:08:04,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1978 to 1849. [2022-11-23 15:08:04,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1849 states, 1394 states have (on average 1.3414634146341464) internal successors, (1870), 1401 states have internal predecessors, (1870), 273 states have call successors, (273), 182 states have call predecessors, (273), 180 states have return successors, (324), 267 states have call predecessors, (324), 270 states have call successors, (324) [2022-11-23 15:08:04,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1849 states to 1849 states and 2467 transitions. [2022-11-23 15:08:04,750 INFO L78 Accepts]: Start accepts. Automaton has 1849 states and 2467 transitions. Word has length 71 [2022-11-23 15:08:04,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:08:04,751 INFO L495 AbstractCegarLoop]: Abstraction has 1849 states and 2467 transitions. [2022-11-23 15:08:04,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-23 15:08:04,751 INFO L276 IsEmpty]: Start isEmpty. Operand 1849 states and 2467 transitions. [2022-11-23 15:08:04,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-23 15:08:04,753 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:08:04,754 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 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] [2022-11-23 15:08:04,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-23 15:08:04,754 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:08:04,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:08:04,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1297691325, now seen corresponding path program 1 times [2022-11-23 15:08:04,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:08:04,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028531582] [2022-11-23 15:08:04,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:08:04,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:08:04,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:08:05,110 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 15:08:05,111 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:08:05,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028531582] [2022-11-23 15:08:05,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028531582] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:08:05,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545626464] [2022-11-23 15:08:05,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:08:05,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:08:05,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:08:05,112 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:08:05,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 15:08:05,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:08:05,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 15:08:05,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:08:05,321 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 15:08:05,321 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:08:05,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545626464] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:08:05,321 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:08:05,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [14] total 15 [2022-11-23 15:08:05,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052837979] [2022-11-23 15:08:05,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:08:05,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:08:05,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:08:05,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:08:05,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-11-23 15:08:05,323 INFO L87 Difference]: Start difference. First operand 1849 states and 2467 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-23 15:08:05,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:08:05,678 INFO L93 Difference]: Finished difference Result 2674 states and 3455 transitions. [2022-11-23 15:08:05,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:08:05,679 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), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 102 [2022-11-23 15:08:05,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:08:05,688 INFO L225 Difference]: With dead ends: 2674 [2022-11-23 15:08:05,689 INFO L226 Difference]: Without dead ends: 1878 [2022-11-23 15:08:05,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-11-23 15:08:05,693 INFO L413 NwaCegarLoop]: 339 mSDtfsCounter, 46 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:08:05,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 619 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:08:05,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1878 states. [2022-11-23 15:08:05,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1878 to 1845. [2022-11-23 15:08:06,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1845 states, 1390 states have (on average 1.3194244604316547) internal successors, (1834), 1397 states have internal predecessors, (1834), 273 states have call successors, (273), 182 states have call predecessors, (273), 180 states have return successors, (324), 267 states have call predecessors, (324), 270 states have call successors, (324) [2022-11-23 15:08:06,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1845 states to 1845 states and 2431 transitions. [2022-11-23 15:08:06,011 INFO L78 Accepts]: Start accepts. Automaton has 1845 states and 2431 transitions. Word has length 102 [2022-11-23 15:08:06,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:08:06,011 INFO L495 AbstractCegarLoop]: Abstraction has 1845 states and 2431 transitions. [2022-11-23 15:08:06,011 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), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-23 15:08:06,012 INFO L276 IsEmpty]: Start isEmpty. Operand 1845 states and 2431 transitions. [2022-11-23 15:08:06,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-23 15:08:06,014 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:08:06,014 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 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, 1, 1, 1, 1] [2022-11-23 15:08:06,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 15:08:06,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:08:06,220 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:08:06,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:08:06,221 INFO L85 PathProgramCache]: Analyzing trace with hash 278866434, now seen corresponding path program 1 times [2022-11-23 15:08:06,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:08:06,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261543072] [2022-11-23 15:08:06,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:08:06,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:08:06,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:08:06,664 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-23 15:08:06,664 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:08:06,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261543072] [2022-11-23 15:08:06,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261543072] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:08:06,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879272608] [2022-11-23 15:08:06,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:08:06,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:08:06,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:08:06,666 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:08:06,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 15:08:06,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:08:06,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 15:08:06,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:08:06,891 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 15:08:06,891 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:08:06,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879272608] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:08:06,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:08:06,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 17 [2022-11-23 15:08:06,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619946478] [2022-11-23 15:08:06,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:08:06,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 15:08:06,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:08:06,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 15:08:06,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-23 15:08:06,894 INFO L87 Difference]: Start difference. First operand 1845 states and 2431 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-23 15:08:07,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:08:07,463 INFO L93 Difference]: Finished difference Result 2707 states and 3435 transitions. [2022-11-23 15:08:07,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 15:08:07,464 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 102 [2022-11-23 15:08:07,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:08:07,472 INFO L225 Difference]: With dead ends: 2707 [2022-11-23 15:08:07,472 INFO L226 Difference]: Without dead ends: 1660 [2022-11-23 15:08:07,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-11-23 15:08:07,476 INFO L413 NwaCegarLoop]: 334 mSDtfsCounter, 316 mSDsluCounter, 921 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 1255 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:08:07,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [318 Valid, 1255 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 15:08:07,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1660 states. [2022-11-23 15:08:07,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1660 to 1475. [2022-11-23 15:08:07,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1475 states, 1152 states have (on average 1.3567708333333333) internal successors, (1563), 1159 states have internal predecessors, (1563), 202 states have call successors, (202), 121 states have call predecessors, (202), 119 states have return successors, (253), 196 states have call predecessors, (253), 199 states have call successors, (253) [2022-11-23 15:08:07,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1475 states to 1475 states and 2018 transitions. [2022-11-23 15:08:07,698 INFO L78 Accepts]: Start accepts. Automaton has 1475 states and 2018 transitions. Word has length 102 [2022-11-23 15:08:07,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:08:07,698 INFO L495 AbstractCegarLoop]: Abstraction has 1475 states and 2018 transitions. [2022-11-23 15:08:07,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-23 15:08:07,699 INFO L276 IsEmpty]: Start isEmpty. Operand 1475 states and 2018 transitions. [2022-11-23 15:08:07,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-23 15:08:07,702 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:08:07,703 INFO L195 NwaCegarLoop]: trace histogram [4, 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, 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] [2022-11-23 15:08:07,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 15:08:07,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-23 15:08:07,909 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:08:07,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:08:07,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1319170186, now seen corresponding path program 1 times [2022-11-23 15:08:07,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:08:07,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840271395] [2022-11-23 15:08:07,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:08:07,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:08:07,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:08:08,130 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-23 15:08:08,130 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:08:08,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840271395] [2022-11-23 15:08:08,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840271395] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:08:08,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106126557] [2022-11-23 15:08:08,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:08:08,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:08:08,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:08:08,132 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:08:08,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 15:08:08,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:08:08,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 15:08:08,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:08:08,392 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 15:08:08,393 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:08:08,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106126557] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:08:08,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:08:08,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-11-23 15:08:08,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147320735] [2022-11-23 15:08:08,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:08:08,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 15:08:08,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:08:08,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 15:08:08,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-23 15:08:08,396 INFO L87 Difference]: Start difference. First operand 1475 states and 2018 transitions. Second operand has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-23 15:08:08,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:08:08,915 INFO L93 Difference]: Finished difference Result 2024 states and 2643 transitions. [2022-11-23 15:08:08,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 15:08:08,916 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 112 [2022-11-23 15:08:08,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:08:08,923 INFO L225 Difference]: With dead ends: 2024 [2022-11-23 15:08:08,924 INFO L226 Difference]: Without dead ends: 1431 [2022-11-23 15:08:08,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-11-23 15:08:08,926 INFO L413 NwaCegarLoop]: 333 mSDtfsCounter, 67 mSDsluCounter, 1243 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 1576 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:08:08,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 1576 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:08:08,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1431 states. [2022-11-23 15:08:09,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1431 to 1339. [2022-11-23 15:08:09,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1339 states, 1052 states have (on average 1.3745247148288973) internal successors, (1446), 1059 states have internal predecessors, (1446), 183 states have call successors, (183), 104 states have call predecessors, (183), 102 states have return successors, (234), 177 states have call predecessors, (234), 180 states have call successors, (234) [2022-11-23 15:08:09,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1339 states to 1339 states and 1863 transitions. [2022-11-23 15:08:09,139 INFO L78 Accepts]: Start accepts. Automaton has 1339 states and 1863 transitions. Word has length 112 [2022-11-23 15:08:09,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:08:09,139 INFO L495 AbstractCegarLoop]: Abstraction has 1339 states and 1863 transitions. [2022-11-23 15:08:09,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-23 15:08:09,140 INFO L276 IsEmpty]: Start isEmpty. Operand 1339 states and 1863 transitions. [2022-11-23 15:08:09,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-23 15:08:09,142 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:08:09,143 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:08:09,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 15:08:09,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-23 15:08:09,356 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:08:09,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:08:09,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1560625492, now seen corresponding path program 1 times [2022-11-23 15:08:09,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:08:09,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225674890] [2022-11-23 15:08:09,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:08:09,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:08:09,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:08:09,552 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-23 15:08:09,552 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:08:09,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225674890] [2022-11-23 15:08:09,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225674890] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:08:09,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693672667] [2022-11-23 15:08:09,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:08:09,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:08:09,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:08:09,554 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:08:09,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 15:08:09,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:08:09,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 15:08:09,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:08:09,803 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-23 15:08:09,804 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:08:09,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693672667] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:08:09,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:08:09,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2022-11-23 15:08:09,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384441100] [2022-11-23 15:08:09,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:08:09,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 15:08:09,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:08:09,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 15:08:09,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-23 15:08:09,806 INFO L87 Difference]: Start difference. First operand 1339 states and 1863 transitions. Second operand has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-23 15:08:10,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:08:10,244 INFO L93 Difference]: Finished difference Result 2088 states and 2708 transitions. [2022-11-23 15:08:10,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 15:08:10,245 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 113 [2022-11-23 15:08:10,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:08:10,252 INFO L225 Difference]: With dead ends: 2088 [2022-11-23 15:08:10,253 INFO L226 Difference]: Without dead ends: 1631 [2022-11-23 15:08:10,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-11-23 15:08:10,255 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 301 mSDsluCounter, 1033 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 1358 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:08:10,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 1358 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:08:10,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1631 states. [2022-11-23 15:08:10,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1631 to 1597. [2022-11-23 15:08:10,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1597 states, 1214 states have (on average 1.3393739703459637) internal successors, (1626), 1227 states have internal predecessors, (1626), 231 states have call successors, (231), 146 states have call predecessors, (231), 150 states have return successors, (294), 225 states have call predecessors, (294), 228 states have call successors, (294) [2022-11-23 15:08:10,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1597 states to 1597 states and 2151 transitions. [2022-11-23 15:08:10,514 INFO L78 Accepts]: Start accepts. Automaton has 1597 states and 2151 transitions. Word has length 113 [2022-11-23 15:08:10,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:08:10,515 INFO L495 AbstractCegarLoop]: Abstraction has 1597 states and 2151 transitions. [2022-11-23 15:08:10,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-23 15:08:10,515 INFO L276 IsEmpty]: Start isEmpty. Operand 1597 states and 2151 transitions. [2022-11-23 15:08:10,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-23 15:08:10,518 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:08:10,518 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:08:10,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 15:08:10,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-23 15:08:10,724 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:08:10,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:08:10,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1049807434, now seen corresponding path program 1 times [2022-11-23 15:08:10,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:08:10,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683623479] [2022-11-23 15:08:10,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:08:10,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:08:10,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:08:11,602 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-23 15:08:11,602 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:08:11,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683623479] [2022-11-23 15:08:11,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683623479] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:08:11,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830374204] [2022-11-23 15:08:11,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:08:11,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:08:11,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:08:11,605 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:08:11,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 15:08:11,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:08:11,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-23 15:08:11,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:08:12,693 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 15:08:12,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:08:14,571 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-23 15:08:14,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830374204] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:08:14,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1225534370] [2022-11-23 15:08:14,575 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2022-11-23 15:08:14,575 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:08:14,575 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:08:14,576 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:08:14,576 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:09:22,795 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 344 for LOIs [2022-11-23 15:09:23,462 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 296 for LOIs [2022-11-23 15:09:23,575 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 289 for LOIs [2022-11-23 15:09:23,684 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 356 for LOIs [2022-11-23 15:09:26,683 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 204 for LOIs [2022-11-23 15:09:27,077 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 153 for LOIs [2022-11-23 15:09:27,462 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 348 for LOIs [2022-11-23 15:09:28,150 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 371 for LOIs [2022-11-23 15:09:29,225 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:09:59,700 WARN L233 SmtUtils]: Spent 5.40s on a formula simplification. DAG size of input: 298 DAG size of output: 230 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:10:05,415 WARN L233 SmtUtils]: Spent 5.35s on a formula simplification. DAG size of input: 300 DAG size of output: 232 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:10:29,751 WARN L233 SmtUtils]: Spent 5.79s on a formula simplification. DAG size of input: 311 DAG size of output: 244 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:10:37,818 WARN L233 SmtUtils]: Spent 5.61s on a formula simplification. DAG size of input: 317 DAG size of output: 246 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:10:43,931 WARN L233 SmtUtils]: Spent 5.66s on a formula simplification. DAG size of input: 323 DAG size of output: 252 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:10:50,091 WARN L233 SmtUtils]: Spent 5.68s on a formula simplification. DAG size of input: 325 DAG size of output: 254 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:11:18,882 WARN L233 SmtUtils]: Spent 5.65s on a formula simplification. DAG size of input: 327 DAG size of output: 256 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:11:20,867 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '68363#(and (= ~q_req_up~0 1) (= ~T6_E~0 2) (= ~t6_i~0 0) (= 0 ~t5_pc~0) (= ~t10_i~0 0) (= ~t7_i~0 0) (<= ~q_buf_0~0 2147483647) (= 0 ~t8_pc~0) (<= ~p_dw_pc~0 1) (= ~T4_E~0 2) (<= 0 ~c_dr_pc~0) (<= 0 ~p_dw_st~0) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (<= 0 ~p_dw_pc~0) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (<= ~token~0 0) (= ~T2_E~0 2) (<= ~c_dr_pc~0 1) (= 1 ~c_dr_i~0) (<= ~p_dw_st~0 2) (<= ~t6_pc~0 0) (= 0 ~t5_st~0) (<= 0 ~t7_st~0) (<= ~T7_E~0 2) (= ~E_3~0 2) (<= ~t7_pc~0 0) (= 0 ~t6_st~0) (<= ~t1_pc~0 0) (<= ~t8_i~0 0) (<= 2 ~M_E~0) (<= ~T9_E~0 2) (= ~t9_i~0 0) (<= |#NULL.offset| 0) (= ~t4_i~0 0) (<= 0 ~t9_st~0) (<= 0 ~t10_st~0) (<= ~t5_i~0 0) (<= 2 ~T8_E~0) (<= 1 ~c_dr_st~0) (<= 2 ~E_9~0) (<= 2 ~E_6~0) (= ~m_i~0 0) (<= 0 (+ ~p_last_write~0 2147483648)) (<= ~t2_i~0 0) (<= 2 ~E_8~0) (<= ~t8_st~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (<= 0 (+ ~q_buf_0~0 2147483648)) (<= ~E_4~0 2) (<= 2 ~E_7~0) (<= ~t10_pc~0 0) (<= ~t9_pc~0 0) (<= 0 ~t5_i~0) (<= 0 ~t8_st~0) (<= ~t9_st~0 0) (= ~E_2~0 2) (<= ~T8_E~0 2) (<= ~E_6~0 2) (<= ~E_10~0 2) (<= 0 ~token~0) (<= 0 ~t2_i~0) (<= ~t3_st~0 0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (<= 0 ~t6_pc~0) (<= 0 ~t3_st~0) (<= ~m_pc~0 0) (<= 0 ~t10_pc~0) (<= 2 ~E_4~0) (= ~T10_E~0 2) (= ~p_dw_i~0 1) (<= 2 ~T7_E~0) (<= 2 ~E_10~0) (= 0 ~t2_pc~0) (<= ~M_E~0 2) (<= ~E_5~0 2) (<= ~m_st~0 0) (<= ~t3_pc~0 0) (= ~c_last_read~0 ~p_last_write~0) (<= 0 ~m_pc~0) (<= ~c_dr_st~0 1) (<= ~p_last_write~0 2147483647) (<= 2 ~T9_E~0) (= ~E_M~0 2) (<= 0 ~t3_pc~0) (<= 0 ~t7_pc~0) (<= ~t7_st~0 0) (= 0 ~t2_st~0) (<= ~E_8~0 2) (<= 0 ~t9_pc~0) (<= 2 ~E_5~0) (<= 0 ~t8_i~0) (<= 1 ~c_num_read~0) (<= 0 ~m_st~0) (<= 0 |#NULL.offset|) (<= ~t4_pc~0 0) (= ~E_1~0 2) (<= 0 ~t4_pc~0) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (<= 0 ~t1_st~0) (<= ~E_7~0 2) (<= ~t10_st~0 0) (<= ~E_9~0 2) (<= 0 ~t1_pc~0) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-23 15:11:20,867 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:11:20,867 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:11:20,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 16] total 49 [2022-11-23 15:11:20,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018830810] [2022-11-23 15:11:20,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:11:20,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-23 15:11:20,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:11:20,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-23 15:11:20,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=770, Invalid=10150, Unknown=0, NotChecked=0, Total=10920 [2022-11-23 15:11:20,872 INFO L87 Difference]: Start difference. First operand 1597 states and 2151 transitions. Second operand has 49 states, 32 states have (on average 6.09375) internal successors, (195), 37 states have internal predecessors, (195), 17 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 17 states have call predecessors, (46), 17 states have call successors, (46) [2022-11-23 15:11:44,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:11:44,091 INFO L93 Difference]: Finished difference Result 3887 states and 4805 transitions. [2022-11-23 15:11:44,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 218 states. [2022-11-23 15:11:44,092 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 32 states have (on average 6.09375) internal successors, (195), 37 states have internal predecessors, (195), 17 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 17 states have call predecessors, (46), 17 states have call successors, (46) Word has length 114 [2022-11-23 15:11:44,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:11:44,106 INFO L225 Difference]: With dead ends: 3887 [2022-11-23 15:11:44,106 INFO L226 Difference]: Without dead ends: 3172 [2022-11-23 15:11:44,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 288 SyntacticMatches, 6 SemanticMatches, 313 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40806 ImplicationChecksByTransitivity, 129.6s TimeCoverageRelationStatistics Valid=9166, Invalid=89744, Unknown=0, NotChecked=0, Total=98910 [2022-11-23 15:11:44,125 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 5108 mSDsluCounter, 3302 mSDsCounter, 0 mSdLazyCounter, 7670 mSolverCounterSat, 2271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5111 SdHoareTripleChecker+Valid, 3550 SdHoareTripleChecker+Invalid, 9941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2271 IncrementalHoareTripleChecker+Valid, 7670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:11:44,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5111 Valid, 3550 Invalid, 9941 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2271 Valid, 7670 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-11-23 15:11:44,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3172 states. [2022-11-23 15:11:44,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3172 to 1873. [2022-11-23 15:11:44,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1873 states, 1398 states have (on average 1.3140200286123034) internal successors, (1837), 1413 states have internal predecessors, (1837), 276 states have call successors, (276), 183 states have call predecessors, (276), 197 states have return successors, (351), 278 states have call predecessors, (351), 273 states have call successors, (351) [2022-11-23 15:11:44,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1873 states to 1873 states and 2464 transitions. [2022-11-23 15:11:44,580 INFO L78 Accepts]: Start accepts. Automaton has 1873 states and 2464 transitions. Word has length 114 [2022-11-23 15:11:44,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:11:44,581 INFO L495 AbstractCegarLoop]: Abstraction has 1873 states and 2464 transitions. [2022-11-23 15:11:44,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 32 states have (on average 6.09375) internal successors, (195), 37 states have internal predecessors, (195), 17 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 17 states have call predecessors, (46), 17 states have call successors, (46) [2022-11-23 15:11:44,582 INFO L276 IsEmpty]: Start isEmpty. Operand 1873 states and 2464 transitions. [2022-11-23 15:11:44,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-23 15:11:44,585 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:11:44,585 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:11:44,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 15:11:44,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-23 15:11:44,796 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:11:44,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:11:44,796 INFO L85 PathProgramCache]: Analyzing trace with hash 974323895, now seen corresponding path program 1 times [2022-11-23 15:11:44,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:11:44,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643303992] [2022-11-23 15:11:44,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:11:44,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:11:44,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:11:45,155 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 15:11:45,155 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:11:45,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643303992] [2022-11-23 15:11:45,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643303992] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:11:45,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293680959] [2022-11-23 15:11:45,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:11:45,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:11:45,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:11:45,157 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:11:45,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 15:11:45,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:11:45,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-23 15:11:45,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:11:45,404 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-23 15:11:45,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:11:45,631 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-23 15:11:45,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293680959] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 15:11:45,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 15:11:45,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14, 8] total 20 [2022-11-23 15:11:45,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817278966] [2022-11-23 15:11:45,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:11:45,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 15:11:45,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:11:45,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 15:11:45,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-11-23 15:11:45,634 INFO L87 Difference]: Start difference. First operand 1873 states and 2464 transitions. Second operand has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-23 15:11:46,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:11:46,790 INFO L93 Difference]: Finished difference Result 3197 states and 4012 transitions. [2022-11-23 15:11:46,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-23 15:11:46,791 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 115 [2022-11-23 15:11:46,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:11:46,802 INFO L225 Difference]: With dead ends: 3197 [2022-11-23 15:11:46,802 INFO L226 Difference]: Without dead ends: 2206 [2022-11-23 15:11:46,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-11-23 15:11:46,806 INFO L413 NwaCegarLoop]: 254 mSDtfsCounter, 496 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 946 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 500 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 1055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-23 15:11:46,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [500 Valid, 716 Invalid, 1055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 946 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-23 15:11:46,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2206 states. [2022-11-23 15:11:47,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2206 to 1953. [2022-11-23 15:11:47,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1953 states, 1443 states have (on average 1.3083853083853083) internal successors, (1888), 1461 states have internal predecessors, (1888), 295 states have call successors, (295), 192 states have call predecessors, (295), 213 states have return successors, (391), 301 states have call predecessors, (391), 292 states have call successors, (391) [2022-11-23 15:11:47,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1953 states to 1953 states and 2574 transitions. [2022-11-23 15:11:47,194 INFO L78 Accepts]: Start accepts. Automaton has 1953 states and 2574 transitions. Word has length 115 [2022-11-23 15:11:47,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:11:47,195 INFO L495 AbstractCegarLoop]: Abstraction has 1953 states and 2574 transitions. [2022-11-23 15:11:47,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-23 15:11:47,195 INFO L276 IsEmpty]: Start isEmpty. Operand 1953 states and 2574 transitions. [2022-11-23 15:11:47,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-23 15:11:47,199 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:11:47,199 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:11:47,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 15:11:47,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-23 15:11:47,406 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:11:47,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:11:47,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1028200645, now seen corresponding path program 1 times [2022-11-23 15:11:47,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:11:47,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577920414] [2022-11-23 15:11:47,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:11:47,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:11:47,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:11:48,232 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 34 proven. 19 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-23 15:11:48,232 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:11:48,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577920414] [2022-11-23 15:11:48,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577920414] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:11:48,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988577933] [2022-11-23 15:11:48,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:11:48,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:11:48,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:11:48,234 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:11:48,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 15:11:48,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:11:48,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-23 15:11:48,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:11:49,366 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 60 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 15:11:49,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:11:51,094 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 13 proven. 44 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-23 15:11:51,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988577933] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:11:51,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1163210091] [2022-11-23 15:11:51,097 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2022-11-23 15:11:51,098 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:11:51,098 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:11:51,098 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:11:51,099 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:12:23,054 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 279 for LOIs [2022-11-23 15:12:23,155 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 282 for LOIs [2022-11-23 15:12:23,249 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 140 for LOIs [2022-11-23 15:12:23,264 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 279 for LOIs [2022-11-23 15:12:24,391 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 279 for LOIs [2022-11-23 15:12:24,992 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 140 for LOIs [2022-11-23 15:12:25,347 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 279 for LOIs [2022-11-23 15:12:25,458 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 289 for LOIs [2022-11-23 15:12:25,570 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:13:58,707 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '86208#(and (= ~q_req_up~0 1) (or (and (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= ~t10_i~0 0) (= ~t7_i~0 0) (= ~t1_pc~0 0) (= 0 ~t8_pc~0) (= 0 ~t7_pc~0) (= ~T4_E~0 2) (= ~E_7~0 2) (= ~E_8~0 2) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (= ~m_st~0 0) (= ~E_5~0 2) (= ~E_10~0 2) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= ~T9_E~0 2) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t3_pc~0) (= 0 ~t6_st~0) (= ~t9_i~0 0) (= ~t2_i~0 0) (= 0 ~t8_st~0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~c_num_read~0 1) (= ~T7_E~0 2) (= ~m_i~0 0) (= ~t10_st~0 0) (= ~t10_pc~0 0) (= 0 ~t9_pc~0) (= ~E_2~0 2) (= ~p_dw_st~0 0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~t8_i~0 0) (= ~token~0 0) (= ~m_pc~0 0) (= 0 ~t9_st~0) (= ~T10_E~0 2) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (= |#NULL.offset| 0) (= ~E_M~0 2) (= 0 ~t2_st~0) (= ~E_1~0 2) (= 0 ~t3_st~0) (= ~T8_E~0 2) (= ~M_E~0 2) (= ~E_9~0 2) (= ~t1_i~0 0) (= |#NULL.base| 0)) (and (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= ~t10_i~0 0) (= ~t7_i~0 0) (= ~t1_pc~0 0) (= 0 ~t8_pc~0) (= 0 ~t7_pc~0) (= ~T4_E~0 2) (= ~E_7~0 2) (= ~E_8~0 2) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (= ~m_st~0 0) (= ~E_5~0 2) (= ~E_10~0 2) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= ~T9_E~0 2) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t3_pc~0) (= 0 ~t6_st~0) (= ~t9_i~0 0) (= ~t2_i~0 0) (= 0 ~t8_st~0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~c_num_read~0 1) (= ~T7_E~0 2) (= ~m_i~0 0) (= ~t10_st~0 0) (= ~t10_pc~0 0) (= 0 ~t9_pc~0) (= ~p_dw_pc~0 1) (= ~E_2~0 2) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~t8_i~0 0) (= ~token~0 0) (= 2 ~p_dw_st~0) (= ~m_pc~0 0) (= 0 ~t9_st~0) (= ~T10_E~0 2) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (= |#NULL.offset| 0) (= ~E_M~0 2) (= 0 ~t2_st~0) (= ~E_1~0 2) (= 0 ~t3_st~0) (= ~T8_E~0 2) (= ~M_E~0 2) (= ~E_9~0 2) (= ~t1_i~0 0) (= |#NULL.base| 0))) (<= 0 ~p_dw_pc~0) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~c_dr_pc~0 1) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~c_last_read~0 ~q_buf_0~0) (= ~c_last_read~0 ~p_last_write~0) (<= ~t4_pc~0 0) (<= 0 ~t4_pc~0) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (= ~c_dr_st~0 1) (<= 0 ~t1_st~0))' at error location [2022-11-23 15:13:58,707 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:13:58,707 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:13:58,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 49 [2022-11-23 15:13:58,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477793559] [2022-11-23 15:13:58,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:13:58,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-23 15:13:58,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:13:58,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-23 15:13:58,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=793, Invalid=9107, Unknown=0, NotChecked=0, Total=9900 [2022-11-23 15:13:58,711 INFO L87 Difference]: Start difference. First operand 1953 states and 2574 transitions. Second operand has 49 states, 33 states have (on average 6.484848484848484) internal successors, (214), 38 states have internal predecessors, (214), 22 states have call successors, (49), 15 states have call predecessors, (49), 21 states have return successors, (51), 21 states have call predecessors, (51), 22 states have call successors, (51) [2022-11-23 15:14:08,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:14:08,904 INFO L93 Difference]: Finished difference Result 4802 states and 5916 transitions. [2022-11-23 15:14:08,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-11-23 15:14:08,905 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 33 states have (on average 6.484848484848484) internal successors, (214), 38 states have internal predecessors, (214), 22 states have call successors, (49), 15 states have call predecessors, (49), 21 states have return successors, (51), 21 states have call predecessors, (51), 22 states have call successors, (51) Word has length 124 [2022-11-23 15:14:08,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:14:08,924 INFO L225 Difference]: With dead ends: 4802 [2022-11-23 15:14:08,924 INFO L226 Difference]: Without dead ends: 3731 [2022-11-23 15:14:08,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 295 SyntacticMatches, 27 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16072 ImplicationChecksByTransitivity, 98.6s TimeCoverageRelationStatistics Valid=3560, Invalid=29746, Unknown=0, NotChecked=0, Total=33306 [2022-11-23 15:14:08,931 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 4013 mSDsluCounter, 2474 mSDsCounter, 0 mSdLazyCounter, 5696 mSolverCounterSat, 2144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4014 SdHoareTripleChecker+Valid, 2693 SdHoareTripleChecker+Invalid, 7840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2144 IncrementalHoareTripleChecker+Valid, 5696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-23 15:14:08,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4014 Valid, 2693 Invalid, 7840 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2144 Valid, 5696 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-11-23 15:14:08,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3731 states. [2022-11-23 15:14:09,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3731 to 2490. [2022-11-23 15:14:09,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2490 states, 1829 states have (on average 1.277747402952433) internal successors, (2337), 1847 states have internal predecessors, (2337), 369 states have call successors, (369), 251 states have call predecessors, (369), 290 states have return successors, (483), 393 states have call predecessors, (483), 366 states have call successors, (483) [2022-11-23 15:14:09,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2490 states to 2490 states and 3189 transitions. [2022-11-23 15:14:09,585 INFO L78 Accepts]: Start accepts. Automaton has 2490 states and 3189 transitions. Word has length 124 [2022-11-23 15:14:09,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:14:09,585 INFO L495 AbstractCegarLoop]: Abstraction has 2490 states and 3189 transitions. [2022-11-23 15:14:09,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 33 states have (on average 6.484848484848484) internal successors, (214), 38 states have internal predecessors, (214), 22 states have call successors, (49), 15 states have call predecessors, (49), 21 states have return successors, (51), 21 states have call predecessors, (51), 22 states have call successors, (51) [2022-11-23 15:14:09,586 INFO L276 IsEmpty]: Start isEmpty. Operand 2490 states and 3189 transitions. [2022-11-23 15:14:09,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-23 15:14:09,590 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:14:09,590 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:14:09,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 15:14:09,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:14:09,798 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:14:09,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:14:09,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1642491732, now seen corresponding path program 1 times [2022-11-23 15:14:09,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:14:09,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410687264] [2022-11-23 15:14:09,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:14:09,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:14:09,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:14:10,051 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 38 proven. 9 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-23 15:14:10,052 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:14:10,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410687264] [2022-11-23 15:14:10,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410687264] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:14:10,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356695397] [2022-11-23 15:14:10,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:14:10,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:14:10,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:14:10,056 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:14:10,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 15:14:10,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:14:10,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-23 15:14:10,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:14:10,388 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 50 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-23 15:14:10,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:14:10,637 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-23 15:14:10,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356695397] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 15:14:10,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 15:14:10,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 10] total 17 [2022-11-23 15:14:10,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965836551] [2022-11-23 15:14:10,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:14:10,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 15:14:10,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:14:10,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 15:14:10,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-23 15:14:10,639 INFO L87 Difference]: Start difference. First operand 2490 states and 3189 transitions. Second operand has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-23 15:14:11,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:14:11,975 INFO L93 Difference]: Finished difference Result 3449 states and 4280 transitions. [2022-11-23 15:14:11,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-23 15:14:11,976 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 125 [2022-11-23 15:14:11,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:14:11,983 INFO L225 Difference]: With dead ends: 3449 [2022-11-23 15:14:11,983 INFO L226 Difference]: Without dead ends: 1841 [2022-11-23 15:14:11,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2022-11-23 15:14:11,987 INFO L413 NwaCegarLoop]: 239 mSDtfsCounter, 691 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 1080 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 693 SdHoareTripleChecker+Valid, 820 SdHoareTripleChecker+Invalid, 1247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 1080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-23 15:14:11,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [693 Valid, 820 Invalid, 1247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 1080 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-23 15:14:11,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1841 states. [2022-11-23 15:14:12,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1841 to 1500. [2022-11-23 15:14:12,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1500 states, 1132 states have (on average 1.338339222614841) internal successors, (1515), 1149 states have internal predecessors, (1515), 219 states have call successors, (219), 130 states have call predecessors, (219), 147 states have return successors, (300), 222 states have call predecessors, (300), 216 states have call successors, (300) [2022-11-23 15:14:12,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1500 states to 1500 states and 2034 transitions. [2022-11-23 15:14:12,294 INFO L78 Accepts]: Start accepts. Automaton has 1500 states and 2034 transitions. Word has length 125 [2022-11-23 15:14:12,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:14:12,294 INFO L495 AbstractCegarLoop]: Abstraction has 1500 states and 2034 transitions. [2022-11-23 15:14:12,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-23 15:14:12,294 INFO L276 IsEmpty]: Start isEmpty. Operand 1500 states and 2034 transitions. [2022-11-23 15:14:12,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-23 15:14:12,297 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:14:12,298 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, 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] [2022-11-23 15:14:12,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-23 15:14:12,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:14:12,504 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:14:12,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:14:12,505 INFO L85 PathProgramCache]: Analyzing trace with hash -276601293, now seen corresponding path program 1 times [2022-11-23 15:14:12,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:14:12,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381252046] [2022-11-23 15:14:12,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:14:12,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:14:12,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:14:12,655 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 15:14:12,655 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:14:12,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381252046] [2022-11-23 15:14:12,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381252046] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:14:12,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524095845] [2022-11-23 15:14:12,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:14:12,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:14:12,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:14:12,657 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:14:12,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-23 15:14:12,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:14:12,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 919 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 15:14:12,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:14:12,992 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 15:14:12,992 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:14:12,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524095845] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:14:12,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:14:12,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 15:14:12,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857731716] [2022-11-23 15:14:12,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:14:12,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:14:12,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:14:12,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:14:12,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:14:12,996 INFO L87 Difference]: Start difference. First operand 1500 states and 2034 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 15:14:13,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:14:13,687 INFO L93 Difference]: Finished difference Result 3014 states and 4552 transitions. [2022-11-23 15:14:13,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:14:13,688 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 123 [2022-11-23 15:14:13,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:14:13,697 INFO L225 Difference]: With dead ends: 3014 [2022-11-23 15:14:13,698 INFO L226 Difference]: Without dead ends: 2249 [2022-11-23 15:14:13,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:14:13,702 INFO L413 NwaCegarLoop]: 304 mSDtfsCounter, 296 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:14:13,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 507 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:14:13,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2249 states. [2022-11-23 15:14:14,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2249 to 2240. [2022-11-23 15:14:14,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2240 states, 1750 states have (on average 1.4) internal successors, (2450), 1770 states have internal predecessors, (2450), 311 states have call successors, (311), 160 states have call predecessors, (311), 177 states have return successors, (442), 311 states have call predecessors, (442), 308 states have call successors, (442) [2022-11-23 15:14:14,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2240 states to 2240 states and 3203 transitions. [2022-11-23 15:14:14,103 INFO L78 Accepts]: Start accepts. Automaton has 2240 states and 3203 transitions. Word has length 123 [2022-11-23 15:14:14,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:14:14,104 INFO L495 AbstractCegarLoop]: Abstraction has 2240 states and 3203 transitions. [2022-11-23 15:14:14,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 15:14:14,104 INFO L276 IsEmpty]: Start isEmpty. Operand 2240 states and 3203 transitions. [2022-11-23 15:14:14,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-23 15:14:14,109 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:14:14,109 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, 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] [2022-11-23 15:14:14,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-23 15:14:14,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-23 15:14:14,315 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:14:14,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:14:14,315 INFO L85 PathProgramCache]: Analyzing trace with hash 262066323, now seen corresponding path program 1 times [2022-11-23 15:14:14,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:14:14,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390207682] [2022-11-23 15:14:14,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:14:14,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:14:14,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:14:14,451 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 15:14:14,452 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:14:14,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390207682] [2022-11-23 15:14:14,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390207682] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:14:14,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279917201] [2022-11-23 15:14:14,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:14:14,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:14:14,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:14:14,454 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:14:14,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-23 15:14:14,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:14:14,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 913 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 15:14:14,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:14:14,731 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-23 15:14:14,731 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:14:14,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279917201] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:14:14,732 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:14:14,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 15:14:14,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220586044] [2022-11-23 15:14:14,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:14:14,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:14:14,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:14:14,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:14:14,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:14:14,733 INFO L87 Difference]: Start difference. First operand 2240 states and 3203 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 15:14:15,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:14:15,529 INFO L93 Difference]: Finished difference Result 5219 states and 8133 transitions. [2022-11-23 15:14:15,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:14:15,530 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 123 [2022-11-23 15:14:15,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:14:15,545 INFO L225 Difference]: With dead ends: 5219 [2022-11-23 15:14:15,546 INFO L226 Difference]: Without dead ends: 3714 [2022-11-23 15:14:15,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:14:15,555 INFO L413 NwaCegarLoop]: 304 mSDtfsCounter, 317 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:14:15,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 507 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:14:15,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3714 states. [2022-11-23 15:14:16,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3714 to 3700. [2022-11-23 15:14:16,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3700 states, 2971 states have (on average 1.4439582632110401) internal successors, (4290), 2997 states have internal predecessors, (4290), 490 states have call successors, (490), 220 states have call predecessors, (490), 237 states have return successors, (717), 484 states have call predecessors, (717), 487 states have call successors, (717) [2022-11-23 15:14:16,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3700 states to 3700 states and 5497 transitions. [2022-11-23 15:14:16,254 INFO L78 Accepts]: Start accepts. Automaton has 3700 states and 5497 transitions. Word has length 123 [2022-11-23 15:14:16,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:14:16,254 INFO L495 AbstractCegarLoop]: Abstraction has 3700 states and 5497 transitions. [2022-11-23 15:14:16,254 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 15:14:16,254 INFO L276 IsEmpty]: Start isEmpty. Operand 3700 states and 5497 transitions. [2022-11-23 15:14:16,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-23 15:14:16,262 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:14:16,263 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, 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] [2022-11-23 15:14:16,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-23 15:14:16,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:14:16,478 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:14:16,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:14:16,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1875878451, now seen corresponding path program 1 times [2022-11-23 15:14:16,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:14:16,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655166040] [2022-11-23 15:14:16,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:14:16,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:14:16,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:14:16,690 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 15:14:16,690 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:14:16,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655166040] [2022-11-23 15:14:16,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655166040] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:14:16,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446952992] [2022-11-23 15:14:16,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:14:16,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:14:16,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:14:16,692 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:14:16,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-23 15:14:16,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:14:16,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 15:14:16,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:14:17,015 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 15:14:17,016 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:14:17,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446952992] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:14:17,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:14:17,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 15:14:17,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781614224] [2022-11-23 15:14:17,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:14:17,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:14:17,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:14:17,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:14:17,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:14:17,020 INFO L87 Difference]: Start difference. First operand 3700 states and 5497 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 15:14:18,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:14:18,190 INFO L93 Difference]: Finished difference Result 9569 states and 15154 transitions. [2022-11-23 15:14:18,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:14:18,190 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 123 [2022-11-23 15:14:18,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:14:18,208 INFO L225 Difference]: With dead ends: 9569 [2022-11-23 15:14:18,209 INFO L226 Difference]: Without dead ends: 6604 [2022-11-23 15:14:18,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:14:18,221 INFO L413 NwaCegarLoop]: 304 mSDtfsCounter, 308 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:14:18,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 507 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:14:18,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6604 states. [2022-11-23 15:14:19,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6604 to 6580. [2022-11-23 15:14:19,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6580 states, 5383 states have (on average 1.4694408322496748) internal successors, (7910), 5421 states have internal predecessors, (7910), 838 states have call successors, (838), 340 states have call predecessors, (838), 357 states have return successors, (1249), 820 states have call predecessors, (1249), 835 states have call successors, (1249) [2022-11-23 15:14:19,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6580 states to 6580 states and 9997 transitions. [2022-11-23 15:14:19,182 INFO L78 Accepts]: Start accepts. Automaton has 6580 states and 9997 transitions. Word has length 123 [2022-11-23 15:14:19,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:14:19,182 INFO L495 AbstractCegarLoop]: Abstraction has 6580 states and 9997 transitions. [2022-11-23 15:14:19,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 15:14:19,182 INFO L276 IsEmpty]: Start isEmpty. Operand 6580 states and 9997 transitions. [2022-11-23 15:14:19,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-23 15:14:19,193 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:14:19,193 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, 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] [2022-11-23 15:14:19,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-23 15:14:19,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:14:19,401 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:14:19,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:14:19,401 INFO L85 PathProgramCache]: Analyzing trace with hash -247563117, now seen corresponding path program 1 times [2022-11-23 15:14:19,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:14:19,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746845674] [2022-11-23 15:14:19,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:14:19,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:14:19,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:14:19,522 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 15:14:19,522 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:14:19,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746845674] [2022-11-23 15:14:19,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746845674] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:14:19,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499093765] [2022-11-23 15:14:19,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:14:19,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:14:19,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:14:19,524 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:14:19,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-23 15:14:19,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:14:19,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 901 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 15:14:19,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:14:19,821 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-23 15:14:19,821 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:14:19,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499093765] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:14:19,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:14:19,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 15:14:19,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926852932] [2022-11-23 15:14:19,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:14:19,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:14:19,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:14:19,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:14:19,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:14:19,825 INFO L87 Difference]: Start difference. First operand 6580 states and 9997 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 15:14:21,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:14:21,874 INFO L93 Difference]: Finished difference Result 18149 states and 28914 transitions. [2022-11-23 15:14:21,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:14:21,875 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 123 [2022-11-23 15:14:21,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:14:22,011 INFO L225 Difference]: With dead ends: 18149 [2022-11-23 15:14:22,011 INFO L226 Difference]: Without dead ends: 12304 [2022-11-23 15:14:22,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:14:22,040 INFO L413 NwaCegarLoop]: 304 mSDtfsCounter, 314 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:14:22,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 507 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:14:22,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12304 states. [2022-11-23 15:14:23,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12304 to 12260. [2022-11-23 15:14:23,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12260 states, 10147 states have (on average 1.4812259781216124) internal successors, (15030), 10209 states have internal predecessors, (15030), 1514 states have call successors, (1514), 580 states have call predecessors, (1514), 597 states have return successors, (2277), 1472 states have call predecessors, (2277), 1511 states have call successors, (2277) [2022-11-23 15:14:23,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12260 states to 12260 states and 18821 transitions. [2022-11-23 15:14:23,892 INFO L78 Accepts]: Start accepts. Automaton has 12260 states and 18821 transitions. Word has length 123 [2022-11-23 15:14:23,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:14:23,893 INFO L495 AbstractCegarLoop]: Abstraction has 12260 states and 18821 transitions. [2022-11-23 15:14:23,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 15:14:23,893 INFO L276 IsEmpty]: Start isEmpty. Operand 12260 states and 18821 transitions. [2022-11-23 15:14:23,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-23 15:14:23,913 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:14:23,913 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, 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] [2022-11-23 15:14:23,926 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-11-23 15:14:24,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-23 15:14:24,120 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:14:24,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:14:24,121 INFO L85 PathProgramCache]: Analyzing trace with hash 217583347, now seen corresponding path program 1 times [2022-11-23 15:14:24,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:14:24,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558000978] [2022-11-23 15:14:24,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:14:24,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:14:24,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:14:24,259 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 15:14:24,259 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:14:24,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558000978] [2022-11-23 15:14:24,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558000978] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:14:24,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450529570] [2022-11-23 15:14:24,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:14:24,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:14:24,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:14:24,262 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:14:24,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-23 15:14:24,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:14:24,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 895 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 15:14:24,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:14:24,695 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-23 15:14:24,695 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:14:24,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450529570] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:14:24,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:14:24,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 15:14:24,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3219042] [2022-11-23 15:14:24,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:14:24,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:14:24,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:14:24,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:14:24,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:14:24,698 INFO L87 Difference]: Start difference. First operand 12260 states and 18821 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 15:14:28,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:14:28,561 INFO L93 Difference]: Finished difference Result 35069 states and 55870 transitions. [2022-11-23 15:14:28,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:14:28,562 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 123 [2022-11-23 15:14:28,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:14:28,666 INFO L225 Difference]: With dead ends: 35069 [2022-11-23 15:14:28,666 INFO L226 Difference]: Without dead ends: 23544 [2022-11-23 15:14:28,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:14:28,709 INFO L413 NwaCegarLoop]: 304 mSDtfsCounter, 302 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:14:28,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 507 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:14:28,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23544 states. [2022-11-23 15:14:31,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23544 to 23460. [2022-11-23 15:14:31,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23460 states, 19555 states have (on average 1.4845308105343902) internal successors, (29030), 19665 states have internal predecessors, (29030), 2826 states have call successors, (2826), 1060 states have call predecessors, (2826), 1077 states have return successors, (4261), 2736 states have call predecessors, (4261), 2823 states have call successors, (4261) [2022-11-23 15:14:32,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23460 states to 23460 states and 36117 transitions. [2022-11-23 15:14:32,082 INFO L78 Accepts]: Start accepts. Automaton has 23460 states and 36117 transitions. Word has length 123 [2022-11-23 15:14:32,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:14:32,083 INFO L495 AbstractCegarLoop]: Abstraction has 23460 states and 36117 transitions. [2022-11-23 15:14:32,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 15:14:32,083 INFO L276 IsEmpty]: Start isEmpty. Operand 23460 states and 36117 transitions. [2022-11-23 15:14:32,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-23 15:14:32,116 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:14:32,116 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, 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] [2022-11-23 15:14:32,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-23 15:14:32,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90f559cd-183f-4ff0-a3f4-ee013ba96797/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-23 15:14:32,325 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:14:32,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:14:32,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1749929645, now seen corresponding path program 1 times [2022-11-23 15:14:32,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:14:32,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460533115] [2022-11-23 15:14:32,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:14:32,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:14:32,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:14:33,013 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-23 15:14:33,014 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:14:33,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460533115] [2022-11-23 15:14:33,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460533115] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:14:33,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:14:33,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 15:14:33,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945727239] [2022-11-23 15:14:33,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:14:33,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 15:14:33,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:14:33,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 15:14:33,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:14:33,017 INFO L87 Difference]: Start difference. First operand 23460 states and 36117 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-23 15:14:40,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:14:40,130 INFO L93 Difference]: Finished difference Result 60108 states and 94235 transitions. [2022-11-23 15:14:40,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-23 15:14:40,135 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 123 [2022-11-23 15:14:40,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:14:40,411 INFO L225 Difference]: With dead ends: 60108 [2022-11-23 15:14:40,411 INFO L226 Difference]: Without dead ends: 37384 [2022-11-23 15:14:40,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-11-23 15:14:40,473 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 871 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 887 SdHoareTripleChecker+Valid, 762 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:14:40,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [887 Valid, 762 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 15:14:40,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37384 states. [2022-11-23 15:14:45,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37384 to 34500. [2022-11-23 15:14:45,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34500 states, 28803 states have (on average 1.4828316494809568) internal successors, (42710), 28961 states have internal predecessors, (42710), 4138 states have call successors, (4138), 1540 states have call predecessors, (4138), 1557 states have return successors, (6245), 4000 states have call predecessors, (6245), 4135 states have call successors, (6245) [2022-11-23 15:14:46,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34500 states to 34500 states and 53093 transitions. [2022-11-23 15:14:46,056 INFO L78 Accepts]: Start accepts. Automaton has 34500 states and 53093 transitions. Word has length 123 [2022-11-23 15:14:46,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:14:46,057 INFO L495 AbstractCegarLoop]: Abstraction has 34500 states and 53093 transitions. [2022-11-23 15:14:46,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-23 15:14:46,058 INFO L276 IsEmpty]: Start isEmpty. Operand 34500 states and 53093 transitions. [2022-11-23 15:14:46,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-23 15:14:46,106 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:14:46,106 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, 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] [2022-11-23 15:14:46,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-23 15:14:46,107 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:14:46,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:14:46,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1234979062, now seen corresponding path program 1 times [2022-11-23 15:14:46,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:14:46,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874073199] [2022-11-23 15:14:46,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:14:46,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:14:46,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:14:46,575 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-23 15:14:46,575 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:14:46,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874073199] [2022-11-23 15:14:46,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874073199] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:14:46,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:14:46,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 15:14:46,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257353876] [2022-11-23 15:14:46,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:14:46,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 15:14:46,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:14:46,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 15:14:46,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:14:46,578 INFO L87 Difference]: Start difference. First operand 34500 states and 53093 transitions. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8)