./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.03.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/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_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.03.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/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_6c667014-1bf6-43c9-9569-8782e687b89b/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 4c3aab1156afcb98b97b027e9b66004d54025f3b89e95d6d35dc2e84fdb640d2 --- 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 13:46:24,705 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 13:46:24,707 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 13:46:24,732 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 13:46:24,735 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 13:46:24,739 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 13:46:24,743 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 13:46:24,747 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 13:46:24,752 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 13:46:24,757 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 13:46:24,759 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 13:46:24,761 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 13:46:24,762 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 13:46:24,765 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 13:46:24,766 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 13:46:24,769 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 13:46:24,770 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 13:46:24,771 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 13:46:24,773 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 13:46:24,780 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 13:46:24,781 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 13:46:24,783 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 13:46:24,785 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 13:46:24,786 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 13:46:24,796 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 13:46:24,796 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 13:46:24,796 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 13:46:24,798 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 13:46:24,799 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 13:46:24,800 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 13:46:24,801 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 13:46:24,801 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 13:46:24,803 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 13:46:24,804 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 13:46:24,807 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 13:46:24,807 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 13:46:24,808 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 13:46:24,808 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 13:46:24,808 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 13:46:24,809 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 13:46:24,810 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 13:46:24,811 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 13:46:24,853 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 13:46:24,857 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 13:46:24,858 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 13:46:24,858 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 13:46:24,859 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 13:46:24,859 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 13:46:24,860 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 13:46:24,860 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 13:46:24,860 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 13:46:24,860 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 13:46:24,861 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 13:46:24,862 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 13:46:24,862 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 13:46:24,862 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 13:46:24,862 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 13:46:24,863 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 13:46:24,863 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 13:46:24,863 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 13:46:24,864 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 13:46:24,864 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 13:46:24,864 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 13:46:24,865 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 13:46:24,865 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 13:46:24,865 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 13:46:24,866 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 13:46:24,866 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 13:46:24,867 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 13:46:24,867 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 13:46:24,867 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 13:46:24,867 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 13:46:24,868 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 13:46:24,868 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 13:46:24,868 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 13:46:24,869 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 13:46:24,869 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 13:46:24,869 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 13:46:24,869 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 13:46:24,869 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 13:46:24,870 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 13:46:24,870 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 13:46:24,870 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 13:46:24,872 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_6c667014-1bf6-43c9-9569-8782e687b89b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4c3aab1156afcb98b97b027e9b66004d54025f3b89e95d6d35dc2e84fdb640d2 [2022-11-23 13:46:25,194 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 13:46:25,219 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 13:46:25,222 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 13:46:25,223 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 13:46:25,223 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 13:46:25,225 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.03.cil-2.c [2022-11-23 13:46:28,289 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 13:46:28,594 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 13:46:28,595 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.03.cil-2.c [2022-11-23 13:46:28,606 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/data/efdf0c5ff/aaacb53cbed6410bbf70e8f6dc5179df/FLAG2d44a0663 [2022-11-23 13:46:28,623 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/data/efdf0c5ff/aaacb53cbed6410bbf70e8f6dc5179df [2022-11-23 13:46:28,626 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 13:46:28,628 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 13:46:28,632 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 13:46:28,632 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 13:46:28,636 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 13:46:28,637 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:46:28" (1/1) ... [2022-11-23 13:46:28,638 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58be9587 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:46:28, skipping insertion in model container [2022-11-23 13:46:28,639 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:46:28" (1/1) ... [2022-11-23 13:46:28,646 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 13:46:28,709 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 13:46:28,866 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_6c667014-1bf6-43c9-9569-8782e687b89b/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.03.cil-2.c[914,927] [2022-11-23 13:46:28,954 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_6c667014-1bf6-43c9-9569-8782e687b89b/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.03.cil-2.c[7115,7128] [2022-11-23 13:46:29,033 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 13:46:29,050 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 13:46:29,070 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_6c667014-1bf6-43c9-9569-8782e687b89b/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.03.cil-2.c[914,927] [2022-11-23 13:46:29,098 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_6c667014-1bf6-43c9-9569-8782e687b89b/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.03.cil-2.c[7115,7128] [2022-11-23 13:46:29,141 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 13:46:29,167 INFO L208 MainTranslator]: Completed translation [2022-11-23 13:46:29,168 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:46:29 WrapperNode [2022-11-23 13:46:29,168 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 13:46:29,170 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 13:46:29,170 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 13:46:29,170 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 13:46:29,177 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:46:29" (1/1) ... [2022-11-23 13:46:29,200 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:46:29" (1/1) ... [2022-11-23 13:46:29,256 INFO L138 Inliner]: procedures = 59, calls = 66, calls flagged for inlining = 28, calls inlined = 28, statements flattened = 518 [2022-11-23 13:46:29,257 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 13:46:29,257 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 13:46:29,257 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 13:46:29,258 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 13:46:29,266 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:46:29" (1/1) ... [2022-11-23 13:46:29,271 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:46:29" (1/1) ... [2022-11-23 13:46:29,274 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:46:29" (1/1) ... [2022-11-23 13:46:29,279 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:46:29" (1/1) ... [2022-11-23 13:46:29,287 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:46:29" (1/1) ... [2022-11-23 13:46:29,310 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:46:29" (1/1) ... [2022-11-23 13:46:29,312 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:46:29" (1/1) ... [2022-11-23 13:46:29,314 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:46:29" (1/1) ... [2022-11-23 13:46:29,321 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 13:46:29,324 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 13:46:29,324 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 13:46:29,324 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 13:46:29,325 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:46:29" (1/1) ... [2022-11-23 13:46:29,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 13:46:29,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:46:29,357 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 13:46:29,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 13:46:29,403 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 13:46:29,403 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-23 13:46:29,404 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-23 13:46:29,404 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-11-23 13:46:29,404 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-11-23 13:46:29,404 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-11-23 13:46:29,405 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-11-23 13:46:29,405 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-11-23 13:46:29,405 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-11-23 13:46:29,405 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-11-23 13:46:29,405 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-11-23 13:46:29,406 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-11-23 13:46:29,406 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-11-23 13:46:29,406 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-11-23 13:46:29,406 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-11-23 13:46:29,406 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-11-23 13:46:29,407 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-11-23 13:46:29,407 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-11-23 13:46:29,407 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-11-23 13:46:29,407 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-11-23 13:46:29,408 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-11-23 13:46:29,408 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-11-23 13:46:29,408 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-11-23 13:46:29,409 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 13:46:29,409 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-11-23 13:46:29,410 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-11-23 13:46:29,410 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-11-23 13:46:29,410 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-11-23 13:46:29,411 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 13:46:29,411 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 13:46:29,411 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-11-23 13:46:29,411 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-11-23 13:46:29,516 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 13:46:29,519 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 13:46:30,183 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 13:46:30,489 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 13:46:30,489 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2022-11-23 13:46:30,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:46:30 BoogieIcfgContainer [2022-11-23 13:46:30,492 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 13:46:30,494 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 13:46:30,494 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 13:46:30,498 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 13:46:30,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:46:28" (1/3) ... [2022-11-23 13:46:30,500 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@799f72bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:46:30, skipping insertion in model container [2022-11-23 13:46:30,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:46:29" (2/3) ... [2022-11-23 13:46:30,502 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@799f72bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:46:30, skipping insertion in model container [2022-11-23 13:46:30,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:46:30" (3/3) ... [2022-11-23 13:46:30,507 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.03.cil-2.c [2022-11-23 13:46:30,526 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 13:46:30,526 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-23 13:46:30,578 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 13:46:30,584 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;@16eb033d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 13:46:30,584 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-23 13:46:30,590 INFO L276 IsEmpty]: Start isEmpty. Operand has 161 states, 113 states have (on average 1.4955752212389382) internal successors, (169), 119 states have internal predecessors, (169), 31 states have call successors, (31), 14 states have call predecessors, (31), 14 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2022-11-23 13:46:30,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-23 13:46:30,601 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:46:30,601 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] [2022-11-23 13:46:30,602 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:46:30,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:46:30,607 INFO L85 PathProgramCache]: Analyzing trace with hash -911236769, now seen corresponding path program 1 times [2022-11-23 13:46:30,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:46:30,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801651236] [2022-11-23 13:46:30,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:46:30,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:46:30,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:46:31,081 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 13:46:31,081 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:46:31,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801651236] [2022-11-23 13:46:31,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801651236] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:46:31,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:46:31,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 13:46:31,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987293793] [2022-11-23 13:46:31,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:46:31,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 13:46:31,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:46:31,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 13:46:31,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 13:46:31,130 INFO L87 Difference]: Start difference. First operand has 161 states, 113 states have (on average 1.4955752212389382) internal successors, (169), 119 states have internal predecessors, (169), 31 states have call successors, (31), 14 states have call predecessors, (31), 14 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 13:46:32,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:46:32,003 INFO L93 Difference]: Finished difference Result 623 states and 938 transitions. [2022-11-23 13:46:32,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 13:46:32,005 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 40 [2022-11-23 13:46:32,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:46:32,026 INFO L225 Difference]: With dead ends: 623 [2022-11-23 13:46:32,031 INFO L226 Difference]: Without dead ends: 457 [2022-11-23 13:46:32,040 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 13:46:32,043 INFO L413 NwaCegarLoop]: 301 mSDtfsCounter, 631 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 639 SdHoareTripleChecker+Valid, 648 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 13:46:32,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [639 Valid, 648 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 13:46:32,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-11-23 13:46:32,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 446. [2022-11-23 13:46:32,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 327 states have (on average 1.4097859327217126) internal successors, (461), 334 states have internal predecessors, (461), 80 states have call successors, (80), 38 states have call predecessors, (80), 37 states have return successors, (104), 75 states have call predecessors, (104), 78 states have call successors, (104) [2022-11-23 13:46:32,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 645 transitions. [2022-11-23 13:46:32,201 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 645 transitions. Word has length 40 [2022-11-23 13:46:32,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:46:32,202 INFO L495 AbstractCegarLoop]: Abstraction has 446 states and 645 transitions. [2022-11-23 13:46:32,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 13:46:32,203 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 645 transitions. [2022-11-23 13:46:32,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-23 13:46:32,211 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:46:32,211 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 13:46:32,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 13:46:32,212 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:46:32,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:46:32,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1284385766, now seen corresponding path program 1 times [2022-11-23 13:46:32,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:46:32,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770988566] [2022-11-23 13:46:32,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:46:32,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:46:32,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:46:32,358 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 13:46:32,358 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:46:32,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770988566] [2022-11-23 13:46:32,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770988566] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:46:32,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:46:32,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 13:46:32,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083677891] [2022-11-23 13:46:32,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:46:32,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 13:46:32,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:46:32,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 13:46:32,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 13:46:32,361 INFO L87 Difference]: Start difference. First operand 446 states and 645 transitions. 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 13:46:32,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:46:32,633 INFO L93 Difference]: Finished difference Result 570 states and 807 transitions. [2022-11-23 13:46:32,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 13:46:32,634 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 13:46:32,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:46:32,641 INFO L225 Difference]: With dead ends: 570 [2022-11-23 13:46:32,641 INFO L226 Difference]: Without dead ends: 506 [2022-11-23 13:46:32,643 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 13:46:32,645 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 271 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 13:46:32,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 390 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 13:46:32,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2022-11-23 13:46:32,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 499. [2022-11-23 13:46:32,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 365 states have (on average 1.3917808219178083) internal successors, (508), 372 states have internal predecessors, (508), 88 states have call successors, (88), 45 states have call predecessors, (88), 44 states have return successors, (112), 83 states have call predecessors, (112), 86 states have call successors, (112) [2022-11-23 13:46:32,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 708 transitions. [2022-11-23 13:46:32,714 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 708 transitions. Word has length 45 [2022-11-23 13:46:32,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:46:32,715 INFO L495 AbstractCegarLoop]: Abstraction has 499 states and 708 transitions. [2022-11-23 13:46:32,715 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 13:46:32,715 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 708 transitions. [2022-11-23 13:46:32,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-23 13:46:32,716 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:46:32,717 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 13:46:32,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 13:46:32,717 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:46:32,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:46:32,718 INFO L85 PathProgramCache]: Analyzing trace with hash -365411143, now seen corresponding path program 1 times [2022-11-23 13:46:32,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:46:32,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659720729] [2022-11-23 13:46:32,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:46:32,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:46:32,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:46:32,961 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 13:46:32,962 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:46:32,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659720729] [2022-11-23 13:46:32,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659720729] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:46:32,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:46:32,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-23 13:46:32,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840872191] [2022-11-23 13:46:32,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:46:32,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 13:46:32,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:46:32,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 13:46:32,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-23 13:46:32,967 INFO L87 Difference]: Start difference. First operand 499 states and 708 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 13:46:33,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:46:33,590 INFO L93 Difference]: Finished difference Result 680 states and 929 transitions. [2022-11-23 13:46:33,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-23 13:46:33,591 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 13:46:33,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:46:33,598 INFO L225 Difference]: With dead ends: 680 [2022-11-23 13:46:33,598 INFO L226 Difference]: Without dead ends: 564 [2022-11-23 13:46:33,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-23 13:46:33,609 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 334 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 13:46:33,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 644 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 650 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 13:46:33,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2022-11-23 13:46:33,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 551. [2022-11-23 13:46:33,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 551 states, 402 states have (on average 1.3805970149253732) internal successors, (555), 409 states have internal predecessors, (555), 96 states have call successors, (96), 52 states have call predecessors, (96), 51 states have return successors, (120), 91 states have call predecessors, (120), 94 states have call successors, (120) [2022-11-23 13:46:33,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 771 transitions. [2022-11-23 13:46:33,685 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 771 transitions. Word has length 45 [2022-11-23 13:46:33,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:46:33,686 INFO L495 AbstractCegarLoop]: Abstraction has 551 states and 771 transitions. [2022-11-23 13:46:33,686 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 13:46:33,686 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 771 transitions. [2022-11-23 13:46:33,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-23 13:46:33,689 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:46:33,690 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 13:46:33,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 13:46:33,690 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:46:33,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:46:33,691 INFO L85 PathProgramCache]: Analyzing trace with hash -471338478, now seen corresponding path program 1 times [2022-11-23 13:46:33,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:46:33,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758638409] [2022-11-23 13:46:33,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:46:33,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:46:33,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:46:33,734 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 13:46:33,735 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:46:33,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758638409] [2022-11-23 13:46:33,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758638409] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:46:33,735 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:46:33,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:46:33,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506872813] [2022-11-23 13:46:33,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:46:33,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:46:33,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:46:33,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:46:33,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:46:33,737 INFO L87 Difference]: Start difference. First operand 551 states and 771 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 13:46:33,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:46:33,928 INFO L93 Difference]: Finished difference Result 879 states and 1177 transitions. [2022-11-23 13:46:33,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:46:33,929 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 13:46:33,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:46:33,933 INFO L225 Difference]: With dead ends: 879 [2022-11-23 13:46:33,934 INFO L226 Difference]: Without dead ends: 710 [2022-11-23 13:46:33,935 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 13:46:33,935 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 190 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:46:33,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 248 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:46:33,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2022-11-23 13:46:34,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 691. [2022-11-23 13:46:34,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 691 states, 497 states have (on average 1.3380281690140845) internal successors, (665), 504 states have internal predecessors, (665), 120 states have call successors, (120), 73 states have call predecessors, (120), 72 states have return successors, (144), 115 states have call predecessors, (144), 118 states have call successors, (144) [2022-11-23 13:46:34,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 929 transitions. [2022-11-23 13:46:34,031 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 929 transitions. Word has length 46 [2022-11-23 13:46:34,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:46:34,032 INFO L495 AbstractCegarLoop]: Abstraction has 691 states and 929 transitions. [2022-11-23 13:46:34,032 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 13:46:34,032 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 929 transitions. [2022-11-23 13:46:34,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-23 13:46:34,033 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:46:34,033 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 13:46:34,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 13:46:34,034 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:46:34,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:46:34,034 INFO L85 PathProgramCache]: Analyzing trace with hash 449491853, now seen corresponding path program 1 times [2022-11-23 13:46:34,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:46:34,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345882044] [2022-11-23 13:46:34,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:46:34,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:46:34,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:46:34,076 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 13:46:34,076 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:46:34,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345882044] [2022-11-23 13:46:34,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345882044] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:46:34,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:46:34,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:46:34,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516302733] [2022-11-23 13:46:34,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:46:34,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:46:34,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:46:34,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:46:34,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:46:34,079 INFO L87 Difference]: Start difference. First operand 691 states and 929 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 13:46:34,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:46:34,251 INFO L93 Difference]: Finished difference Result 1061 states and 1374 transitions. [2022-11-23 13:46:34,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:46:34,251 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 13:46:34,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:46:34,256 INFO L225 Difference]: With dead ends: 1061 [2022-11-23 13:46:34,256 INFO L226 Difference]: Without dead ends: 798 [2022-11-23 13:46:34,257 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 13:46:34,257 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 67 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:46:34,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 349 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:46:34,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2022-11-23 13:46:34,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 792. [2022-11-23 13:46:34,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 792 states, 568 states have (on average 1.3257042253521127) internal successors, (753), 575 states have internal predecessors, (753), 136 states have call successors, (136), 87 states have call predecessors, (136), 86 states have return successors, (160), 131 states have call predecessors, (160), 134 states have call successors, (160) [2022-11-23 13:46:34,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 1049 transitions. [2022-11-23 13:46:34,371 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 1049 transitions. Word has length 47 [2022-11-23 13:46:34,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:46:34,372 INFO L495 AbstractCegarLoop]: Abstraction has 792 states and 1049 transitions. [2022-11-23 13:46:34,372 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 13:46:34,372 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 1049 transitions. [2022-11-23 13:46:34,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-23 13:46:34,375 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:46:34,375 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 13:46:34,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 13:46:34,376 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:46:34,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:46:34,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1236058268, now seen corresponding path program 1 times [2022-11-23 13:46:34,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:46:34,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191733882] [2022-11-23 13:46:34,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:46:34,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:46:34,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:46:34,492 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 13:46:34,492 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:46:34,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191733882] [2022-11-23 13:46:34,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191733882] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:46:34,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:46:34,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 13:46:34,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327066485] [2022-11-23 13:46:34,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:46:34,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 13:46:34,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:46:34,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 13:46:34,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 13:46:34,494 INFO L87 Difference]: Start difference. First operand 792 states and 1049 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 13:46:34,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:46:34,772 INFO L93 Difference]: Finished difference Result 899 states and 1175 transitions. [2022-11-23 13:46:34,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 13:46:34,772 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 13:46:34,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:46:34,777 INFO L225 Difference]: With dead ends: 899 [2022-11-23 13:46:34,777 INFO L226 Difference]: Without dead ends: 896 [2022-11-23 13:46:34,778 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 13:46:34,784 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 344 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 13:46:34,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [344 Valid, 231 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 13:46:34,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2022-11-23 13:46:34,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 791. [2022-11-23 13:46:34,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 568 states have (on average 1.3204225352112675) internal successors, (750), 574 states have internal predecessors, (750), 135 states have call successors, (135), 87 states have call predecessors, (135), 86 states have return successors, (160), 131 states have call predecessors, (160), 134 states have call successors, (160) [2022-11-23 13:46:34,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 1045 transitions. [2022-11-23 13:46:34,882 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 1045 transitions. Word has length 54 [2022-11-23 13:46:34,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:46:34,884 INFO L495 AbstractCegarLoop]: Abstraction has 791 states and 1045 transitions. [2022-11-23 13:46:34,884 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 13:46:34,884 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 1045 transitions. [2022-11-23 13:46:34,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-23 13:46:34,886 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:46:34,886 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 13:46:34,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 13:46:34,886 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:46:34,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:46:34,887 INFO L85 PathProgramCache]: Analyzing trace with hash 336125942, now seen corresponding path program 1 times [2022-11-23 13:46:34,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:46:34,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080388486] [2022-11-23 13:46:34,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:46:34,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:46:34,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:46:35,082 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 13:46:35,083 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:46:35,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080388486] [2022-11-23 13:46:35,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080388486] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:46:35,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671302471] [2022-11-23 13:46:35,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:46:35,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:46:35,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:46:35,091 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:46:35,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 13:46:35,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:46:35,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 13:46:35,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:46:35,681 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 13:46:35,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:46:35,892 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 13:46:35,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671302471] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:46:35,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [714880232] [2022-11-23 13:46:35,911 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2022-11-23 13:46:35,911 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 13:46:35,915 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 13:46:35,920 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 13:46:35,920 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 13:46:38,526 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 115 for LOIs [2022-11-23 13:46:38,548 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 83 for LOIs [2022-11-23 13:46:38,556 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 111 for LOIs [2022-11-23 13:46:38,580 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 119 for LOIs [2022-11-23 13:46:38,960 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 115 for LOIs [2022-11-23 13:46:39,007 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 115 for LOIs [2022-11-23 13:46:39,055 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 115 for LOIs [2022-11-23 13:46:39,076 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 122 for LOIs [2022-11-23 13:46:39,096 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 13:46:50,948 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13061#(and (= ~q_req_up~0 1) (= ~t1_pc~0 0) (= ~T1_E~0 2) (= ~m_st~0 0) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= ~E_3~0 2) (= 0 ~t3_pc~0) (= ~t2_i~0 0) (= ~t1_st~0 0) (= ~c_num_read~0 1) (= ~m_i~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~p_dw_pc~0 1) (= ~E_2~0 2) (= ~c_last_read~0 ~q_buf_0~0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= ~token~0 0) (= ~c_dr_pc~0 0) (= 2 ~p_dw_st~0) (= ~m_pc~0 0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (= |#NULL.offset| 0) (= ~c_last_read~0 ~p_last_write~0) (= ~E_M~0 2) (= ~a_t~0 0) (= 0 ~t2_st~0) (= ~E_1~0 2) (= 0 ~t3_st~0) (= ~M_E~0 2) (<= 0 |#StackHeapBarrier|) (= ~c_dr_st~0 1) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-23 13:46:50,949 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 13:46:50,949 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:46:50,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-11-23 13:46:50,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784625736] [2022-11-23 13:46:50,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 13:46:50,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 13:46:50,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:46:50,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 13:46:50,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1867, Unknown=0, NotChecked=0, Total=2070 [2022-11-23 13:46:50,952 INFO L87 Difference]: Start difference. First operand 791 states and 1045 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 4 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-23 13:46:51,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:46:51,543 INFO L93 Difference]: Finished difference Result 1568 states and 1973 transitions. [2022-11-23 13:46:51,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 13:46:51,544 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 4 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 55 [2022-11-23 13:46:51,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:46:51,553 INFO L225 Difference]: With dead ends: 1568 [2022-11-23 13:46:51,553 INFO L226 Difference]: Without dead ends: 1565 [2022-11-23 13:46:51,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=203, Invalid=1867, Unknown=0, NotChecked=0, Total=2070 [2022-11-23 13:46:51,556 INFO L413 NwaCegarLoop]: 299 mSDtfsCounter, 455 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 807 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 13:46:51,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [455 Valid, 807 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 13:46:51,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1565 states. [2022-11-23 13:46:51,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1565 to 1191. [2022-11-23 13:46:51,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1191 states, 848 states have (on average 1.294811320754717) internal successors, (1098), 854 states have internal predecessors, (1098), 199 states have call successors, (199), 143 states have call predecessors, (199), 142 states have return successors, (224), 195 states have call predecessors, (224), 198 states have call successors, (224) [2022-11-23 13:46:51,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1191 states to 1191 states and 1521 transitions. [2022-11-23 13:46:51,665 INFO L78 Accepts]: Start accepts. Automaton has 1191 states and 1521 transitions. Word has length 55 [2022-11-23 13:46:51,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:46:51,666 INFO L495 AbstractCegarLoop]: Abstraction has 1191 states and 1521 transitions. [2022-11-23 13:46:51,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 4 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-23 13:46:51,666 INFO L276 IsEmpty]: Start isEmpty. Operand 1191 states and 1521 transitions. [2022-11-23 13:46:51,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-23 13:46:51,668 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:46:51,668 INFO L195 NwaCegarLoop]: trace histogram [3, 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 13:46:51,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 13:46:51,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:46:51,875 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:46:51,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:46:51,875 INFO L85 PathProgramCache]: Analyzing trace with hash 992874084, now seen corresponding path program 2 times [2022-11-23 13:46:51,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:46:51,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554350665] [2022-11-23 13:46:51,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:46:51,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:46:51,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:46:51,919 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:46:51,919 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:46:51,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554350665] [2022-11-23 13:46:51,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554350665] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:46:51,920 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:46:51,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:46:51,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300705941] [2022-11-23 13:46:51,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:46:51,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:46:51,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:46:51,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:46:51,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:46:51,923 INFO L87 Difference]: Start difference. First operand 1191 states and 1521 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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 13:46:52,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:46:52,095 INFO L93 Difference]: Finished difference Result 1608 states and 2018 transitions. [2022-11-23 13:46:52,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:46:52,096 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), 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 58 [2022-11-23 13:46:52,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:46:52,101 INFO L225 Difference]: With dead ends: 1608 [2022-11-23 13:46:52,101 INFO L226 Difference]: Without dead ends: 995 [2022-11-23 13:46:52,102 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 13:46:52,103 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 188 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:46:52,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 289 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:46:52,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2022-11-23 13:46:52,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 993. [2022-11-23 13:46:52,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 993 states, 710 states have (on average 1.2901408450704226) internal successors, (916), 716 states have internal predecessors, (916), 167 states have call successors, (167), 115 states have call predecessors, (167), 114 states have return successors, (192), 163 states have call predecessors, (192), 166 states have call successors, (192) [2022-11-23 13:46:52,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 993 states to 993 states and 1275 transitions. [2022-11-23 13:46:52,204 INFO L78 Accepts]: Start accepts. Automaton has 993 states and 1275 transitions. Word has length 58 [2022-11-23 13:46:52,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:46:52,204 INFO L495 AbstractCegarLoop]: Abstraction has 993 states and 1275 transitions. [2022-11-23 13:46:52,205 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), 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 13:46:52,205 INFO L276 IsEmpty]: Start isEmpty. Operand 993 states and 1275 transitions. [2022-11-23 13:46:52,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-23 13:46:52,206 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:46:52,207 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 13:46:52,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 13:46:52,207 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:46:52,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:46:52,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1510064802, now seen corresponding path program 1 times [2022-11-23 13:46:52,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:46:52,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524872312] [2022-11-23 13:46:52,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:46:52,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:46:52,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:46:52,250 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 13:46:52,250 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:46:52,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524872312] [2022-11-23 13:46:52,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524872312] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:46:52,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:46:52,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:46:52,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012148042] [2022-11-23 13:46:52,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:46:52,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:46:52,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:46:52,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:46:52,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:46:52,253 INFO L87 Difference]: Start difference. First operand 993 states and 1275 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 13:46:52,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:46:52,483 INFO L93 Difference]: Finished difference Result 1624 states and 2025 transitions. [2022-11-23 13:46:52,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:46:52,484 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 13:46:52,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:46:52,490 INFO L225 Difference]: With dead ends: 1624 [2022-11-23 13:46:52,490 INFO L226 Difference]: Without dead ends: 1249 [2022-11-23 13:46:52,492 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 13:46:52,492 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 43 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:46:52,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 389 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:46:52,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1249 states. [2022-11-23 13:46:52,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1249 to 1068. [2022-11-23 13:46:52,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1068 states, 771 states have (on average 1.2853437094682232) internal successors, (991), 777 states have internal predecessors, (991), 174 states have call successors, (174), 122 states have call predecessors, (174), 121 states have return successors, (199), 170 states have call predecessors, (199), 173 states have call successors, (199) [2022-11-23 13:46:52,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1364 transitions. [2022-11-23 13:46:52,626 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1364 transitions. Word has length 61 [2022-11-23 13:46:52,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:46:52,626 INFO L495 AbstractCegarLoop]: Abstraction has 1068 states and 1364 transitions. [2022-11-23 13:46:52,627 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 13:46:52,627 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1364 transitions. [2022-11-23 13:46:52,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-23 13:46:52,631 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:46:52,632 INFO L195 NwaCegarLoop]: trace histogram [3, 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 13:46:52,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 13:46:52,632 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:46:52,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:46:52,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1013883676, now seen corresponding path program 1 times [2022-11-23 13:46:52,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:46:52,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265355006] [2022-11-23 13:46:52,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:46:52,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:46:52,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:46:52,814 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 13:46:52,814 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:46:52,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265355006] [2022-11-23 13:46:52,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265355006] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:46:52,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:46:52,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-23 13:46:52,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881426437] [2022-11-23 13:46:52,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:46:52,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 13:46:52,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:46:52,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 13:46:52,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-23 13:46:52,823 INFO L87 Difference]: Start difference. First operand 1068 states and 1364 transitions. Second operand has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 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 13:46:53,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:46:53,485 INFO L93 Difference]: Finished difference Result 2121 states and 2579 transitions. [2022-11-23 13:46:53,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-23 13:46:53,486 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 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 70 [2022-11-23 13:46:53,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:46:53,493 INFO L225 Difference]: With dead ends: 2121 [2022-11-23 13:46:53,494 INFO L226 Difference]: Without dead ends: 1436 [2022-11-23 13:46:53,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-23 13:46:53,496 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 315 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 13:46:53,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [337 Valid, 545 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 13:46:53,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1436 states. [2022-11-23 13:46:53,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1436 to 1387. [2022-11-23 13:46:53,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1387 states, 985 states have (on average 1.2527918781725889) internal successors, (1234), 991 states have internal predecessors, (1234), 230 states have call successors, (230), 171 states have call predecessors, (230), 170 states have return successors, (255), 226 states have call predecessors, (255), 229 states have call successors, (255) [2022-11-23 13:46:53,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1387 states to 1387 states and 1719 transitions. [2022-11-23 13:46:53,687 INFO L78 Accepts]: Start accepts. Automaton has 1387 states and 1719 transitions. Word has length 70 [2022-11-23 13:46:53,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:46:53,689 INFO L495 AbstractCegarLoop]: Abstraction has 1387 states and 1719 transitions. [2022-11-23 13:46:53,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 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 13:46:53,689 INFO L276 IsEmpty]: Start isEmpty. Operand 1387 states and 1719 transitions. [2022-11-23 13:46:53,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-23 13:46:53,691 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:46:53,692 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 13:46:53,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-23 13:46:53,692 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:46:53,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:46:53,693 INFO L85 PathProgramCache]: Analyzing trace with hash -955459290, now seen corresponding path program 1 times [2022-11-23 13:46:53,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:46:53,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115714197] [2022-11-23 13:46:53,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:46:53,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:46:53,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:46:53,750 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 13:46:53,750 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:46:53,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115714197] [2022-11-23 13:46:53,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115714197] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:46:53,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:46:53,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:46:53,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203856131] [2022-11-23 13:46:53,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:46:53,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:46:53,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:46:53,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:46:53,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:46:53,753 INFO L87 Difference]: Start difference. First operand 1387 states and 1719 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 13:46:53,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:46:53,986 INFO L93 Difference]: Finished difference Result 2359 states and 2847 transitions. [2022-11-23 13:46:53,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:46:53,987 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 13:46:53,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:46:53,994 INFO L225 Difference]: With dead ends: 2359 [2022-11-23 13:46:53,995 INFO L226 Difference]: Without dead ends: 1563 [2022-11-23 13:46:53,997 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 13:46:53,998 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 38 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:46:53,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 383 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:46:54,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1563 states. [2022-11-23 13:46:54,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1563 to 1434. [2022-11-23 13:46:54,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1434 states, 1024 states have (on average 1.25390625) internal successors, (1284), 1030 states have internal predecessors, (1284), 234 states have call successors, (234), 175 states have call predecessors, (234), 174 states have return successors, (259), 230 states have call predecessors, (259), 233 states have call successors, (259) [2022-11-23 13:46:54,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1434 states to 1434 states and 1777 transitions. [2022-11-23 13:46:54,193 INFO L78 Accepts]: Start accepts. Automaton has 1434 states and 1777 transitions. Word has length 71 [2022-11-23 13:46:54,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:46:54,194 INFO L495 AbstractCegarLoop]: Abstraction has 1434 states and 1777 transitions. [2022-11-23 13:46:54,194 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 13:46:54,194 INFO L276 IsEmpty]: Start isEmpty. Operand 1434 states and 1777 transitions. [2022-11-23 13:46:54,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-23 13:46:54,201 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:46:54,202 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, 1, 1, 1, 1, 1, 1, 1, 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 13:46:54,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-23 13:46:54,202 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:46:54,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:46:54,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1468371616, now seen corresponding path program 1 times [2022-11-23 13:46:54,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:46:54,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590255290] [2022-11-23 13:46:54,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:46:54,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:46:54,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:46:54,279 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 13:46:54,279 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:46:54,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590255290] [2022-11-23 13:46:54,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590255290] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:46:54,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774196746] [2022-11-23 13:46:54,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:46:54,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:46:54,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:46:54,281 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:46:54,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 13:46:54,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:46:54,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 13:46:54,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:46:54,454 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 13:46:54,454 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:46:54,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774196746] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:46:54,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 13:46:54,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 13:46:54,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756063798] [2022-11-23 13:46:54,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:46:54,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:46:54,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:46:54,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:46:54,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 13:46:54,457 INFO L87 Difference]: Start difference. First operand 1434 states and 1777 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 13:46:54,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:46:54,746 INFO L93 Difference]: Finished difference Result 2162 states and 2888 transitions. [2022-11-23 13:46:54,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:46:54,747 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 73 [2022-11-23 13:46:54,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:46:54,755 INFO L225 Difference]: With dead ends: 2162 [2022-11-23 13:46:54,755 INFO L226 Difference]: Without dead ends: 1790 [2022-11-23 13:46:54,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 73 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 13:46:54,759 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 184 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:46:54,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 280 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:46:54,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1790 states. [2022-11-23 13:46:54,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1790 to 1783. [2022-11-23 13:46:54,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1783 states, 1286 states have (on average 1.280715396578538) internal successors, (1647), 1295 states have internal predecessors, (1647), 291 states have call successors, (291), 205 states have call predecessors, (291), 204 states have return successors, (338), 284 states have call predecessors, (338), 290 states have call successors, (338) [2022-11-23 13:46:54,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1783 states to 1783 states and 2276 transitions. [2022-11-23 13:46:54,973 INFO L78 Accepts]: Start accepts. Automaton has 1783 states and 2276 transitions. Word has length 73 [2022-11-23 13:46:54,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:46:54,973 INFO L495 AbstractCegarLoop]: Abstraction has 1783 states and 2276 transitions. [2022-11-23 13:46:54,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 13:46:54,974 INFO L276 IsEmpty]: Start isEmpty. Operand 1783 states and 2276 transitions. [2022-11-23 13:46:54,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-23 13:46:54,976 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:46:54,976 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, 1, 1, 1, 1, 1, 1, 1, 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 13:46:54,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 13:46:55,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-23 13:46:55,182 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:46:55,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:46:55,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1974574050, now seen corresponding path program 1 times [2022-11-23 13:46:55,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:46:55,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385659986] [2022-11-23 13:46:55,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:46:55,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:46:55,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:46:55,508 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 13:46:55,509 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:46:55,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385659986] [2022-11-23 13:46:55,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385659986] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:46:55,509 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:46:55,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 13:46:55,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330546287] [2022-11-23 13:46:55,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:46:55,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 13:46:55,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:46:55,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 13:46:55,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 13:46:55,511 INFO L87 Difference]: Start difference. First operand 1783 states and 2276 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-23 13:46:56,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:46:56,130 INFO L93 Difference]: Finished difference Result 2997 states and 4087 transitions. [2022-11-23 13:46:56,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-23 13:46:56,130 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 73 [2022-11-23 13:46:56,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:46:56,141 INFO L225 Difference]: With dead ends: 2997 [2022-11-23 13:46:56,141 INFO L226 Difference]: Without dead ends: 2277 [2022-11-23 13:46:56,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-11-23 13:46:56,145 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 400 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 13:46:56,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [417 Valid, 446 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 13:46:56,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2277 states. [2022-11-23 13:46:56,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2277 to 2191. [2022-11-23 13:46:56,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2191 states, 1589 states have (on average 1.2945248584015103) internal successors, (2057), 1602 states have internal predecessors, (2057), 360 states have call successors, (360), 241 states have call predecessors, (360), 240 states have return successors, (440), 349 states have call predecessors, (440), 359 states have call successors, (440) [2022-11-23 13:46:56,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2191 states to 2191 states and 2857 transitions. [2022-11-23 13:46:56,440 INFO L78 Accepts]: Start accepts. Automaton has 2191 states and 2857 transitions. Word has length 73 [2022-11-23 13:46:56,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:46:56,441 INFO L495 AbstractCegarLoop]: Abstraction has 2191 states and 2857 transitions. [2022-11-23 13:46:56,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-23 13:46:56,441 INFO L276 IsEmpty]: Start isEmpty. Operand 2191 states and 2857 transitions. [2022-11-23 13:46:56,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-23 13:46:56,444 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:46:56,444 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:46:56,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-23 13:46:56,445 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:46:56,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:46:56,445 INFO L85 PathProgramCache]: Analyzing trace with hash -542680176, now seen corresponding path program 1 times [2022-11-23 13:46:56,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:46:56,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220962419] [2022-11-23 13:46:56,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:46:56,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:46:56,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:46:56,503 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 13:46:56,504 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:46:56,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220962419] [2022-11-23 13:46:56,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220962419] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:46:56,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:46:56,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:46:56,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195782278] [2022-11-23 13:46:56,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:46:56,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:46:56,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:46:56,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:46:56,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:46:56,506 INFO L87 Difference]: Start difference. First operand 2191 states and 2857 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-23 13:46:56,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:46:56,850 INFO L93 Difference]: Finished difference Result 3421 states and 4686 transitions. [2022-11-23 13:46:56,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:46:56,851 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 74 [2022-11-23 13:46:56,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:46:56,862 INFO L225 Difference]: With dead ends: 3421 [2022-11-23 13:46:56,862 INFO L226 Difference]: Without dead ends: 2435 [2022-11-23 13:46:56,866 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 13:46:56,866 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 46 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:46:56,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 403 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:46:56,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2435 states. [2022-11-23 13:46:57,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2435 to 2310. [2022-11-23 13:46:57,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2310 states, 1696 states have (on average 1.3142688679245282) internal successors, (2229), 1709 states have internal predecessors, (2229), 366 states have call successors, (366), 247 states have call predecessors, (366), 246 states have return successors, (446), 355 states have call predecessors, (446), 365 states have call successors, (446) [2022-11-23 13:46:57,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2310 states to 2310 states and 3041 transitions. [2022-11-23 13:46:57,160 INFO L78 Accepts]: Start accepts. Automaton has 2310 states and 3041 transitions. Word has length 74 [2022-11-23 13:46:57,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:46:57,160 INFO L495 AbstractCegarLoop]: Abstraction has 2310 states and 3041 transitions. [2022-11-23 13:46:57,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-23 13:46:57,161 INFO L276 IsEmpty]: Start isEmpty. Operand 2310 states and 3041 transitions. [2022-11-23 13:46:57,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-23 13:46:57,165 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:46:57,166 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 13:46:57,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-23 13:46:57,167 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:46:57,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:46:57,167 INFO L85 PathProgramCache]: Analyzing trace with hash -475164843, now seen corresponding path program 1 times [2022-11-23 13:46:57,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:46:57,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079548032] [2022-11-23 13:46:57,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:46:57,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:46:57,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:46:57,546 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 13:46:57,546 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:46:57,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079548032] [2022-11-23 13:46:57,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079548032] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:46:57,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928169295] [2022-11-23 13:46:57,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:46:57,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:46:57,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:46:57,549 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:46:57,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 13:46:57,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:46:57,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 13:46:57,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:46:57,757 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 13:46:57,757 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:46:57,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928169295] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:46:57,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 13:46:57,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [14] total 15 [2022-11-23 13:46:57,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926295657] [2022-11-23 13:46:57,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:46:57,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:46:57,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:46:57,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:46:57,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-11-23 13:46:57,760 INFO L87 Difference]: Start difference. First operand 2310 states and 3041 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 13:46:58,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:46:58,109 INFO L93 Difference]: Finished difference Result 3135 states and 4029 transitions. [2022-11-23 13:46:58,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:46:58,110 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 13:46:58,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:46:58,119 INFO L225 Difference]: With dead ends: 3135 [2022-11-23 13:46:58,119 INFO L226 Difference]: Without dead ends: 2339 [2022-11-23 13:46:58,121 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 13:46:58,122 INFO L413 NwaCegarLoop]: 221 mSDtfsCounter, 46 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:46:58,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 389 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:46:58,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2339 states. [2022-11-23 13:46:58,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2339 to 2306. [2022-11-23 13:46:58,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2306 states, 1692 states have (on average 1.2960992907801419) internal successors, (2193), 1705 states have internal predecessors, (2193), 366 states have call successors, (366), 247 states have call predecessors, (366), 246 states have return successors, (446), 355 states have call predecessors, (446), 365 states have call successors, (446) [2022-11-23 13:46:58,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2306 states to 2306 states and 3005 transitions. [2022-11-23 13:46:58,403 INFO L78 Accepts]: Start accepts. Automaton has 2306 states and 3005 transitions. Word has length 102 [2022-11-23 13:46:58,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:46:58,404 INFO L495 AbstractCegarLoop]: Abstraction has 2306 states and 3005 transitions. [2022-11-23 13:46:58,404 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 13:46:58,404 INFO L276 IsEmpty]: Start isEmpty. Operand 2306 states and 3005 transitions. [2022-11-23 13:46:58,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-23 13:46:58,409 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:46:58,409 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 13:46:58,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 13:46:58,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-23 13:46:58,615 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:46:58,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:46:58,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1101392916, now seen corresponding path program 1 times [2022-11-23 13:46:58,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:46:58,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317919401] [2022-11-23 13:46:58,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:46:58,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:46:58,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:46:59,050 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 13:46:59,050 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:46:59,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317919401] [2022-11-23 13:46:59,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317919401] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:46:59,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588824439] [2022-11-23 13:46:59,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:46:59,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:46:59,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:46:59,053 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:46:59,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 13:46:59,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:46:59,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 13:46:59,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:46:59,270 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 13:46:59,270 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:46:59,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588824439] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:46:59,270 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 13:46:59,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 17 [2022-11-23 13:46:59,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560423899] [2022-11-23 13:46:59,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:46:59,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 13:46:59,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:46:59,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 13:46:59,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-23 13:46:59,273 INFO L87 Difference]: Start difference. First operand 2306 states and 3005 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 13:46:59,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:46:59,721 INFO L93 Difference]: Finished difference Result 3170 states and 4010 transitions. [2022-11-23 13:46:59,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 13:46:59,722 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 13:46:59,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:46:59,731 INFO L225 Difference]: With dead ends: 3170 [2022-11-23 13:46:59,731 INFO L226 Difference]: Without dead ends: 2123 [2022-11-23 13:46:59,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-11-23 13:46:59,735 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 182 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 823 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 13:46:59,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 823 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 13:46:59,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2123 states. [2022-11-23 13:47:00,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2123 to 1938. [2022-11-23 13:47:00,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1938 states, 1455 states have (on average 1.3216494845360824) internal successors, (1923), 1468 states have internal predecessors, (1923), 295 states have call successors, (295), 187 states have call predecessors, (295), 186 states have return successors, (375), 284 states have call predecessors, (375), 294 states have call successors, (375) [2022-11-23 13:47:00,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1938 states to 1938 states and 2593 transitions. [2022-11-23 13:47:00,028 INFO L78 Accepts]: Start accepts. Automaton has 1938 states and 2593 transitions. Word has length 102 [2022-11-23 13:47:00,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:47:00,028 INFO L495 AbstractCegarLoop]: Abstraction has 1938 states and 2593 transitions. [2022-11-23 13:47:00,029 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 13:47:00,030 INFO L276 IsEmpty]: Start isEmpty. Operand 1938 states and 2593 transitions. [2022-11-23 13:47:00,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-23 13:47:00,035 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:47:00,035 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:47:00,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 13:47:00,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:47:00,241 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:47:00,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:47:00,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1860212688, now seen corresponding path program 1 times [2022-11-23 13:47:00,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:47:00,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41426658] [2022-11-23 13:47:00,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:47:00,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:47:00,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:47:00,297 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-23 13:47:00,298 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:47:00,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41426658] [2022-11-23 13:47:00,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41426658] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:47:00,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:47:00,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:47:00,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604989759] [2022-11-23 13:47:00,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:47:00,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:47:00,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:47:00,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:47:00,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:47:00,300 INFO L87 Difference]: Start difference. First operand 1938 states and 2593 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-23 13:47:00,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:47:00,692 INFO L93 Difference]: Finished difference Result 4363 states and 6217 transitions. [2022-11-23 13:47:00,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:47:00,693 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 97 [2022-11-23 13:47:00,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:47:00,710 INFO L225 Difference]: With dead ends: 4363 [2022-11-23 13:47:00,710 INFO L226 Difference]: Without dead ends: 3115 [2022-11-23 13:47:00,716 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 13:47:00,716 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 178 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:47:00,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 278 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:47:00,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3115 states. [2022-11-23 13:47:01,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3115 to 3091. [2022-11-23 13:47:01,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3091 states, 2328 states have (on average 1.3354810996563573) internal successors, (3109), 2351 states have internal predecessors, (3109), 473 states have call successors, (473), 289 states have call predecessors, (473), 288 states have return successors, (620), 452 states have call predecessors, (620), 472 states have call successors, (620) [2022-11-23 13:47:01,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3091 states to 3091 states and 4202 transitions. [2022-11-23 13:47:01,123 INFO L78 Accepts]: Start accepts. Automaton has 3091 states and 4202 transitions. Word has length 97 [2022-11-23 13:47:01,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:47:01,124 INFO L495 AbstractCegarLoop]: Abstraction has 3091 states and 4202 transitions. [2022-11-23 13:47:01,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-23 13:47:01,124 INFO L276 IsEmpty]: Start isEmpty. Operand 3091 states and 4202 transitions. [2022-11-23 13:47:01,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-23 13:47:01,132 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:47:01,132 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 13:47:01,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-23 13:47:01,133 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:47:01,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:47:01,133 INFO L85 PathProgramCache]: Analyzing trace with hash 192220974, now seen corresponding path program 1 times [2022-11-23 13:47:01,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:47:01,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713272445] [2022-11-23 13:47:01,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:47:01,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:47:01,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:47:01,329 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 13:47:01,329 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:47:01,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713272445] [2022-11-23 13:47:01,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713272445] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:47:01,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228470247] [2022-11-23 13:47:01,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:47:01,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:47:01,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:47:01,331 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:47:01,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 13:47:01,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:47:01,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 13:47:01,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:47:01,553 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 13:47:01,554 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:47:01,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228470247] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:47:01,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 13:47:01,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-11-23 13:47:01,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978125481] [2022-11-23 13:47:01,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:47:01,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 13:47:01,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:47:01,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 13:47:01,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-23 13:47:01,556 INFO L87 Difference]: Start difference. First operand 3091 states and 4202 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 13:47:02,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:47:02,099 INFO L93 Difference]: Finished difference Result 3640 states and 4827 transitions. [2022-11-23 13:47:02,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 13:47:02,100 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 13:47:02,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:47:02,129 INFO L225 Difference]: With dead ends: 3640 [2022-11-23 13:47:02,135 INFO L226 Difference]: Without dead ends: 3047 [2022-11-23 13:47:02,139 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 13:47:02,139 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 67 mSDsluCounter, 792 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 1012 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 13:47:02,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 1012 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 13:47:02,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3047 states. [2022-11-23 13:47:02,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3047 to 2955. [2022-11-23 13:47:02,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2955 states, 2228 states have (on average 1.3429084380610412) internal successors, (2992), 2251 states have internal predecessors, (2992), 454 states have call successors, (454), 272 states have call predecessors, (454), 271 states have return successors, (601), 433 states have call predecessors, (601), 453 states have call successors, (601) [2022-11-23 13:47:02,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2955 states to 2955 states and 4047 transitions. [2022-11-23 13:47:02,633 INFO L78 Accepts]: Start accepts. Automaton has 2955 states and 4047 transitions. Word has length 112 [2022-11-23 13:47:02,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:47:02,633 INFO L495 AbstractCegarLoop]: Abstraction has 2955 states and 4047 transitions. [2022-11-23 13:47:02,633 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 13:47:02,634 INFO L276 IsEmpty]: Start isEmpty. Operand 2955 states and 4047 transitions. [2022-11-23 13:47:02,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-23 13:47:02,644 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:47:02,644 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 13:47:02,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 13:47:02,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-23 13:47:02,850 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:47:02,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:47:02,851 INFO L85 PathProgramCache]: Analyzing trace with hash 188521773, now seen corresponding path program 1 times [2022-11-23 13:47:02,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:47:02,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355472813] [2022-11-23 13:47:02,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:47:02,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:47:02,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:47:03,074 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 13:47:03,074 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:47:03,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355472813] [2022-11-23 13:47:03,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355472813] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:47:03,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292444821] [2022-11-23 13:47:03,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:47:03,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:47:03,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:47:03,077 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:47:03,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 13:47:03,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:47:03,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 13:47:03,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:47:03,285 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 13:47:03,285 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:47:03,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292444821] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:47:03,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 13:47:03,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2022-11-23 13:47:03,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123186291] [2022-11-23 13:47:03,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:47:03,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 13:47:03,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:47:03,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 13:47:03,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-23 13:47:03,289 INFO L87 Difference]: Start difference. First operand 2955 states and 4047 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 13:47:03,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:47:03,864 INFO L93 Difference]: Finished difference Result 3704 states and 4892 transitions. [2022-11-23 13:47:03,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 13:47:03,865 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 13:47:03,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:47:03,875 INFO L225 Difference]: With dead ends: 3704 [2022-11-23 13:47:03,875 INFO L226 Difference]: Without dead ends: 3247 [2022-11-23 13:47:03,877 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 13:47:03,878 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 167 mSDsluCounter, 685 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 894 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:47:03,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 894 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:47:03,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3247 states. [2022-11-23 13:47:04,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3247 to 3213. [2022-11-23 13:47:04,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3213 states, 2390 states have (on average 1.3271966527196652) internal successors, (3172), 2419 states have internal predecessors, (3172), 502 states have call successors, (502), 314 states have call predecessors, (502), 319 states have return successors, (661), 481 states have call predecessors, (661), 501 states have call successors, (661) [2022-11-23 13:47:04,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3213 states to 3213 states and 4335 transitions. [2022-11-23 13:47:04,273 INFO L78 Accepts]: Start accepts. Automaton has 3213 states and 4335 transitions. Word has length 113 [2022-11-23 13:47:04,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:47:04,274 INFO L495 AbstractCegarLoop]: Abstraction has 3213 states and 4335 transitions. [2022-11-23 13:47:04,274 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 13:47:04,274 INFO L276 IsEmpty]: Start isEmpty. Operand 3213 states and 4335 transitions. [2022-11-23 13:47:04,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-23 13:47:04,283 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:47:04,283 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 13:47:04,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 13:47:04,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:47:04,489 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:47:04,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:47:04,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1181390692, now seen corresponding path program 1 times [2022-11-23 13:47:04,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:47:04,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513572701] [2022-11-23 13:47:04,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:47:04,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:47:04,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:47:05,425 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 13:47:05,425 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:47:05,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513572701] [2022-11-23 13:47:05,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513572701] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:47:05,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063641714] [2022-11-23 13:47:05,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:47:05,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:47:05,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:47:05,433 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:47:05,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 13:47:05,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:47:05,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-23 13:47:05,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:47:06,593 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 13:47:06,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:47:08,664 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 13:47:08,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063641714] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:47:08,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1987477775] [2022-11-23 13:47:08,668 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2022-11-23 13:47:08,668 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 13:47:08,669 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 13:47:08,669 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 13:47:08,669 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 13:47:29,076 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 192 for LOIs [2022-11-23 13:47:29,323 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 143 for LOIs [2022-11-23 13:47:29,364 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 134 for LOIs [2022-11-23 13:47:29,393 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 204 for LOIs [2022-11-23 13:47:30,427 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 122 for LOIs [2022-11-23 13:47:30,608 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 68 for LOIs [2022-11-23 13:47:30,712 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 196 for LOIs [2022-11-23 13:47:31,030 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 219 for LOIs [2022-11-23 13:47:31,421 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 13:48:00,907 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '105537#(and (= ~q_req_up~0 1) (<= 0 ~c_dr_pc~0) (<= 0 ~p_dw_st~0) (= ~T1_E~0 2) (<= 0 ~p_dw_pc~0) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (<= ~c_dr_pc~0 1) (= 1 ~c_dr_i~0) (<= ~p_dw_st~0 2) (= ~E_3~0 2) (<= ~t1_pc~0 0) (<= 2 ~M_E~0) (<= |#NULL.offset| 0) (<= 1 ~c_dr_st~0) (= ~m_i~0 0) (<= ~t2_i~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~E_2~0 2) (<= 0 ~t2_i~0) (<= ~t3_st~0 0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= ~token~0 0) (<= 0 ~t3_st~0) (<= ~m_pc~0 0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (<= ~M_E~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) (= ~E_M~0 2) (<= 0 ~t3_pc~0) (= 0 ~t2_st~0) (<= 1 ~c_num_read~0) (<= 0 ~m_st~0) (<= 0 |#NULL.offset|) (= ~E_1~0 2) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (<= 0 ~t1_st~0) (<= 0 ~t1_pc~0) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-23 13:48:00,907 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 13:48:00,908 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:48:00,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 16] total 51 [2022-11-23 13:48:00,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779146155] [2022-11-23 13:48:00,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 13:48:00,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-23 13:48:00,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:48:00,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-23 13:48:00,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=775, Invalid=10567, Unknown=0, NotChecked=0, Total=11342 [2022-11-23 13:48:00,912 INFO L87 Difference]: Start difference. First operand 3213 states and 4335 transitions. Second operand has 51 states, 33 states have (on average 5.909090909090909) internal successors, (195), 38 states have internal predecessors, (195), 19 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 19 states have call predecessors, (46), 19 states have call successors, (46) [2022-11-23 13:48:23,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:48:23,218 INFO L93 Difference]: Finished difference Result 5724 states and 7251 transitions. [2022-11-23 13:48:23,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 229 states. [2022-11-23 13:48:23,223 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 33 states have (on average 5.909090909090909) internal successors, (195), 38 states have internal predecessors, (195), 19 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 19 states have call predecessors, (46), 19 states have call successors, (46) Word has length 114 [2022-11-23 13:48:23,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:48:23,245 INFO L225 Difference]: With dead ends: 5724 [2022-11-23 13:48:23,245 INFO L226 Difference]: Without dead ends: 5009 [2022-11-23 13:48:23,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 622 GetRequests, 287 SyntacticMatches, 6 SemanticMatches, 329 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44526 ImplicationChecksByTransitivity, 46.7s TimeCoverageRelationStatistics Valid=10062, Invalid=99168, Unknown=0, NotChecked=0, Total=109230 [2022-11-23 13:48:23,267 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 4420 mSDsluCounter, 2308 mSDsCounter, 0 mSdLazyCounter, 6815 mSolverCounterSat, 2480 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4421 SdHoareTripleChecker+Valid, 2487 SdHoareTripleChecker+Invalid, 9295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2480 IncrementalHoareTripleChecker+Valid, 6815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-11-23 13:48:23,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4421 Valid, 2487 Invalid, 9295 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2480 Valid, 6815 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-11-23 13:48:23,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5009 states. [2022-11-23 13:48:23,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5009 to 3489. [2022-11-23 13:48:23,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3489 states, 2574 states have (on average 1.3142968142968143) internal successors, (3383), 2605 states have internal predecessors, (3383), 547 states have call successors, (547), 351 states have call predecessors, (547), 366 states have return successors, (718), 534 states have call predecessors, (718), 546 states have call successors, (718) [2022-11-23 13:48:23,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3489 states to 3489 states and 4648 transitions. [2022-11-23 13:48:23,902 INFO L78 Accepts]: Start accepts. Automaton has 3489 states and 4648 transitions. Word has length 114 [2022-11-23 13:48:23,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:48:23,906 INFO L495 AbstractCegarLoop]: Abstraction has 3489 states and 4648 transitions. [2022-11-23 13:48:23,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 33 states have (on average 5.909090909090909) internal successors, (195), 38 states have internal predecessors, (195), 19 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 19 states have call predecessors, (46), 19 states have call successors, (46) [2022-11-23 13:48:23,907 INFO L276 IsEmpty]: Start isEmpty. Operand 3489 states and 4648 transitions. [2022-11-23 13:48:23,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-23 13:48:23,916 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:48:23,916 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 13:48:23,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 13:48:24,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2022-11-23 13:48:24,122 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:48:24,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:48:24,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1339438238, now seen corresponding path program 1 times [2022-11-23 13:48:24,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:48:24,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92830486] [2022-11-23 13:48:24,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:48:24,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:48:24,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:48:24,521 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 13:48:24,521 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:48:24,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92830486] [2022-11-23 13:48:24,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92830486] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:48:24,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745744426] [2022-11-23 13:48:24,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:48:24,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:48:24,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:48:24,523 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:48:24,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 13:48:24,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:48:24,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-23 13:48:24,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:48:24,759 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 13:48:24,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:48:24,983 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 13:48:24,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745744426] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 13:48:24,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 13:48:24,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14, 8] total 20 [2022-11-23 13:48:24,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887406377] [2022-11-23 13:48:24,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:48:24,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 13:48:24,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:48:24,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 13:48:24,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-11-23 13:48:24,985 INFO L87 Difference]: Start difference. First operand 3489 states and 4648 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 13:48:26,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:48:26,114 INFO L93 Difference]: Finished difference Result 4813 states and 6196 transitions. [2022-11-23 13:48:26,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-23 13:48:26,115 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 13:48:26,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:48:26,128 INFO L225 Difference]: With dead ends: 4813 [2022-11-23 13:48:26,128 INFO L226 Difference]: Without dead ends: 3822 [2022-11-23 13:48:26,132 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 13:48:26,133 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 303 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 13:48:26,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 436 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 13:48:26,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3822 states. [2022-11-23 13:48:26,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3822 to 3569. [2022-11-23 13:48:26,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3569 states, 2619 states have (on average 1.3111874761359297) internal successors, (3434), 2653 states have internal predecessors, (3434), 566 states have call successors, (566), 360 states have call predecessors, (566), 382 states have return successors, (758), 557 states have call predecessors, (758), 565 states have call successors, (758) [2022-11-23 13:48:26,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3569 states to 3569 states and 4758 transitions. [2022-11-23 13:48:26,695 INFO L78 Accepts]: Start accepts. Automaton has 3569 states and 4758 transitions. Word has length 115 [2022-11-23 13:48:26,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:48:26,695 INFO L495 AbstractCegarLoop]: Abstraction has 3569 states and 4758 transitions. [2022-11-23 13:48:26,696 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 13:48:26,696 INFO L276 IsEmpty]: Start isEmpty. Operand 3569 states and 4758 transitions. [2022-11-23 13:48:26,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-23 13:48:26,705 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:48:26,705 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:48:26,711 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-23 13:48:26,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-23 13:48:26,911 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:48:26,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:48:26,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1765750631, now seen corresponding path program 1 times [2022-11-23 13:48:26,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:48:26,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316475779] [2022-11-23 13:48:26,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:48:26,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:48:26,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:48:26,996 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-23 13:48:26,997 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:48:26,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316475779] [2022-11-23 13:48:26,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316475779] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:48:26,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509575780] [2022-11-23 13:48:26,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:48:26,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:48:26,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:48:26,999 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:48:27,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 13:48:27,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:48:27,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 13:48:27,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:48:27,185 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-23 13:48:27,185 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:48:27,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509575780] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:48:27,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 13:48:27,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-23 13:48:27,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267032368] [2022-11-23 13:48:27,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:48:27,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:48:27,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:48:27,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:48:27,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 13:48:27,188 INFO L87 Difference]: Start difference. First operand 3569 states and 4758 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-23 13:48:27,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:48:27,944 INFO L93 Difference]: Finished difference Result 5931 states and 8159 transitions. [2022-11-23 13:48:27,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:48:27,945 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 109 [2022-11-23 13:48:27,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:48:27,958 INFO L225 Difference]: With dead ends: 5931 [2022-11-23 13:48:27,958 INFO L226 Difference]: Without dead ends: 4157 [2022-11-23 13:48:27,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 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 13:48:27,968 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 179 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 13:48:27,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 211 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 13:48:27,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4157 states. [2022-11-23 13:48:28,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4157 to 4069. [2022-11-23 13:48:28,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4069 states, 3050 states have (on average 1.3) internal successors, (3965), 3080 states have internal predecessors, (3965), 584 states have call successors, (584), 410 states have call predecessors, (584), 433 states have return successors, (783), 580 states have call predecessors, (783), 583 states have call successors, (783) [2022-11-23 13:48:28,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4069 states to 4069 states and 5332 transitions. [2022-11-23 13:48:28,552 INFO L78 Accepts]: Start accepts. Automaton has 4069 states and 5332 transitions. Word has length 109 [2022-11-23 13:48:28,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:48:28,553 INFO L495 AbstractCegarLoop]: Abstraction has 4069 states and 5332 transitions. [2022-11-23 13:48:28,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-23 13:48:28,553 INFO L276 IsEmpty]: Start isEmpty. Operand 4069 states and 5332 transitions. [2022-11-23 13:48:28,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-23 13:48:28,563 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:48:28,563 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:48:28,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 13:48:28,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-23 13:48:28,769 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:48:28,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:48:28,769 INFO L85 PathProgramCache]: Analyzing trace with hash -2074189640, now seen corresponding path program 1 times [2022-11-23 13:48:28,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:48:28,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680060616] [2022-11-23 13:48:28,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:48:28,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:48:28,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:48:28,855 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-23 13:48:28,855 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:48:28,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680060616] [2022-11-23 13:48:28,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680060616] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:48:28,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870835844] [2022-11-23 13:48:28,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:48:28,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:48:28,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:48:28,857 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:48:28,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 13:48:29,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:48:29,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 13:48:29,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:48:29,030 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-23 13:48:29,030 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:48:29,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870835844] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:48:29,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 13:48:29,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-23 13:48:29,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635914852] [2022-11-23 13:48:29,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:48:29,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:48:29,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:48:29,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:48:29,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 13:48:29,033 INFO L87 Difference]: Start difference. First operand 4069 states and 5332 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-23 13:48:29,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:48:29,913 INFO L93 Difference]: Finished difference Result 6695 states and 9021 transitions. [2022-11-23 13:48:29,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:48:29,913 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 109 [2022-11-23 13:48:29,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:48:29,928 INFO L225 Difference]: With dead ends: 6695 [2022-11-23 13:48:29,928 INFO L226 Difference]: Without dead ends: 4563 [2022-11-23 13:48:29,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 13:48:29,935 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 54 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:48:29,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 404 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:48:29,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4563 states. [2022-11-23 13:48:30,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4563 to 4275. [2022-11-23 13:48:30,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4275 states, 3232 states have (on average 1.3159034653465347) internal successors, (4253), 3262 states have internal predecessors, (4253), 596 states have call successors, (596), 422 states have call predecessors, (596), 445 states have return successors, (795), 592 states have call predecessors, (795), 595 states have call successors, (795) [2022-11-23 13:48:30,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4275 states to 4275 states and 5644 transitions. [2022-11-23 13:48:30,465 INFO L78 Accepts]: Start accepts. Automaton has 4275 states and 5644 transitions. Word has length 109 [2022-11-23 13:48:30,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:48:30,465 INFO L495 AbstractCegarLoop]: Abstraction has 4275 states and 5644 transitions. [2022-11-23 13:48:30,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-23 13:48:30,466 INFO L276 IsEmpty]: Start isEmpty. Operand 4275 states and 5644 transitions. [2022-11-23 13:48:30,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-23 13:48:30,474 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:48:30,475 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:48:30,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-23 13:48:30,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-23 13:48:30,681 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:48:30,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:48:30,682 INFO L85 PathProgramCache]: Analyzing trace with hash -730651071, now seen corresponding path program 2 times [2022-11-23 13:48:30,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:48:30,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607019183] [2022-11-23 13:48:30,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:48:30,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:48:30,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:48:30,949 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-23 13:48:30,949 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:48:30,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607019183] [2022-11-23 13:48:30,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607019183] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:48:30,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494262712] [2022-11-23 13:48:30,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 13:48:30,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:48:30,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:48:30,951 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:48:30,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-23 13:48:31,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 13:48:31,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 13:48:31,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 13:48:31,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:48:31,091 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-23 13:48:31,091 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:48:31,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494262712] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:48:31,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 13:48:31,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-23 13:48:31,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625652485] [2022-11-23 13:48:31,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:48:31,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:48:31,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:48:31,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:48:31,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-23 13:48:31,094 INFO L87 Difference]: Start difference. First operand 4275 states and 5644 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-23 13:48:31,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:48:31,835 INFO L93 Difference]: Finished difference Result 7210 states and 9929 transitions. [2022-11-23 13:48:31,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:48:31,836 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 109 [2022-11-23 13:48:31,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:48:31,852 INFO L225 Difference]: With dead ends: 7210 [2022-11-23 13:48:31,853 INFO L226 Difference]: Without dead ends: 4872 [2022-11-23 13:48:31,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-23 13:48:31,862 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 109 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:48:31,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 418 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:48:31,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4872 states. [2022-11-23 13:48:32,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4872 to 4798. [2022-11-23 13:48:32,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4798 states, 3654 states have (on average 1.3111658456486042) internal successors, (4791), 3688 states have internal predecessors, (4791), 655 states have call successors, (655), 465 states have call predecessors, (655), 487 states have return successors, (911), 646 states have call predecessors, (911), 654 states have call successors, (911) [2022-11-23 13:48:32,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4798 states to 4798 states and 6357 transitions. [2022-11-23 13:48:32,585 INFO L78 Accepts]: Start accepts. Automaton has 4798 states and 6357 transitions. Word has length 109 [2022-11-23 13:48:32,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:48:32,585 INFO L495 AbstractCegarLoop]: Abstraction has 4798 states and 6357 transitions. [2022-11-23 13:48:32,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-23 13:48:32,585 INFO L276 IsEmpty]: Start isEmpty. Operand 4798 states and 6357 transitions. [2022-11-23 13:48:32,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-23 13:48:32,594 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:48:32,594 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:48:32,599 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-23 13:48:32,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-23 13:48:32,800 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:48:32,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:48:32,800 INFO L85 PathProgramCache]: Analyzing trace with hash 244107795, now seen corresponding path program 1 times [2022-11-23 13:48:32,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:48:32,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507760392] [2022-11-23 13:48:32,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:48:32,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:48:32,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:48:32,994 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-23 13:48:32,995 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:48:32,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507760392] [2022-11-23 13:48:32,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507760392] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:48:32,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010138654] [2022-11-23 13:48:32,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:48:32,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:48:32,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:48:32,997 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:48:33,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-23 13:48:33,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:48:33,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 13:48:33,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:48:33,173 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-23 13:48:33,173 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:48:33,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010138654] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:48:33,174 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 13:48:33,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-23 13:48:33,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572458386] [2022-11-23 13:48:33,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:48:33,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:48:33,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:48:33,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:48:33,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-23 13:48:33,176 INFO L87 Difference]: Start difference. First operand 4798 states and 6357 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-23 13:48:34,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:48:34,144 INFO L93 Difference]: Finished difference Result 9794 states and 13423 transitions. [2022-11-23 13:48:34,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:48:34,145 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 110 [2022-11-23 13:48:34,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:48:34,166 INFO L225 Difference]: With dead ends: 9794 [2022-11-23 13:48:34,166 INFO L226 Difference]: Without dead ends: 6165 [2022-11-23 13:48:34,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-23 13:48:34,177 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 51 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:48:34,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 365 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:48:34,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6165 states. [2022-11-23 13:48:34,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6165 to 5238. [2022-11-23 13:48:34,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5238 states, 4042 states have (on average 1.3337456704601682) internal successors, (5391), 4077 states have internal predecessors, (5391), 681 states have call successors, (681), 491 states have call predecessors, (681), 513 states have return successors, (937), 671 states have call predecessors, (937), 680 states have call successors, (937) [2022-11-23 13:48:34,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5238 states to 5238 states and 7009 transitions. [2022-11-23 13:48:34,944 INFO L78 Accepts]: Start accepts. Automaton has 5238 states and 7009 transitions. Word has length 110 [2022-11-23 13:48:34,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:48:34,945 INFO L495 AbstractCegarLoop]: Abstraction has 5238 states and 7009 transitions. [2022-11-23 13:48:34,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-23 13:48:34,945 INFO L276 IsEmpty]: Start isEmpty. Operand 5238 states and 7009 transitions. [2022-11-23 13:48:34,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-23 13:48:34,953 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:48:34,954 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:48:34,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-23 13:48:35,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-23 13:48:35,159 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:48:35,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:48:35,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1003080199, now seen corresponding path program 1 times [2022-11-23 13:48:35,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:48:35,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691869492] [2022-11-23 13:48:35,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:48:35,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:48:35,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:48:35,345 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 18 proven. 26 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-23 13:48:35,346 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:48:35,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691869492] [2022-11-23 13:48:35,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691869492] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:48:35,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201927115] [2022-11-23 13:48:35,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:48:35,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:48:35,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:48:35,351 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:48:35,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-23 13:48:35,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:48:35,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 13:48:35,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:48:35,578 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-23 13:48:35,579 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:48:35,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201927115] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:48:35,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 13:48:35,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-11-23 13:48:35,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145635976] [2022-11-23 13:48:35,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:48:35,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 13:48:35,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:48:35,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 13:48:35,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-23 13:48:35,581 INFO L87 Difference]: Start difference. First operand 5238 states and 7009 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-23 13:48:37,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:48:37,050 INFO L93 Difference]: Finished difference Result 11196 states and 15291 transitions. [2022-11-23 13:48:37,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 13:48:37,050 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), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 111 [2022-11-23 13:48:37,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:48:37,075 INFO L225 Difference]: With dead ends: 11196 [2022-11-23 13:48:37,076 INFO L226 Difference]: Without dead ends: 7127 [2022-11-23 13:48:37,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-11-23 13:48:37,087 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 399 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 13:48:37,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [421 Valid, 397 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 13:48:37,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7127 states. [2022-11-23 13:48:38,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7127 to 7125. [2022-11-23 13:48:38,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7125 states, 5536 states have (on average 1.330021676300578) internal successors, (7363), 5581 states have internal predecessors, (7363), 911 states have call successors, (911), 654 states have call predecessors, (911), 676 states have return successors, (1260), 891 states have call predecessors, (1260), 910 states have call successors, (1260) [2022-11-23 13:48:38,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7125 states to 7125 states and 9534 transitions. [2022-11-23 13:48:38,251 INFO L78 Accepts]: Start accepts. Automaton has 7125 states and 9534 transitions. Word has length 111 [2022-11-23 13:48:38,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:48:38,252 INFO L495 AbstractCegarLoop]: Abstraction has 7125 states and 9534 transitions. [2022-11-23 13:48:38,252 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), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-23 13:48:38,252 INFO L276 IsEmpty]: Start isEmpty. Operand 7125 states and 9534 transitions. [2022-11-23 13:48:38,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-23 13:48:38,262 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:48:38,262 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:48:38,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-23 13:48:38,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-23 13:48:38,469 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:48:38,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:48:38,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1746096297, now seen corresponding path program 1 times [2022-11-23 13:48:38,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:48:38,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992726026] [2022-11-23 13:48:38,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:48:38,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:48:38,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:48:38,564 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-23 13:48:38,564 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:48:38,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992726026] [2022-11-23 13:48:38,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992726026] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:48:38,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119567581] [2022-11-23 13:48:38,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:48:38,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:48:38,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:48:38,566 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:48:38,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-23 13:48:38,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:48:38,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 13:48:38,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:48:38,737 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-23 13:48:38,737 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:48:38,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119567581] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:48:38,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 13:48:38,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-23 13:48:38,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676206991] [2022-11-23 13:48:38,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:48:38,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:48:38,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:48:38,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:48:38,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 13:48:38,739 INFO L87 Difference]: Start difference. First operand 7125 states and 9534 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-23 13:48:39,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:48:39,827 INFO L93 Difference]: Finished difference Result 12540 states and 17196 transitions. [2022-11-23 13:48:39,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:48:39,827 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 111 [2022-11-23 13:48:39,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:48:39,850 INFO L225 Difference]: With dead ends: 12540 [2022-11-23 13:48:39,850 INFO L226 Difference]: Without dead ends: 8531 [2022-11-23 13:48:39,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 13:48:39,862 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 59 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:48:39,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 412 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:48:39,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8531 states. [2022-11-23 13:48:41,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8531 to 7809. [2022-11-23 13:48:41,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7809 states, 6132 states have (on average 1.3478473581213308) internal successors, (8265), 6177 states have internal predecessors, (8265), 955 states have call successors, (955), 698 states have call predecessors, (955), 720 states have return successors, (1304), 935 states have call predecessors, (1304), 954 states have call successors, (1304) [2022-11-23 13:48:41,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7809 states to 7809 states and 10524 transitions. [2022-11-23 13:48:41,143 INFO L78 Accepts]: Start accepts. Automaton has 7809 states and 10524 transitions. Word has length 111 [2022-11-23 13:48:41,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:48:41,143 INFO L495 AbstractCegarLoop]: Abstraction has 7809 states and 10524 transitions. [2022-11-23 13:48:41,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-23 13:48:41,144 INFO L276 IsEmpty]: Start isEmpty. Operand 7809 states and 10524 transitions. [2022-11-23 13:48:41,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-23 13:48:41,154 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:48:41,155 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:48:41,162 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-11-23 13:48:41,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:48:41,362 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:48:41,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:48:41,362 INFO L85 PathProgramCache]: Analyzing trace with hash 322754275, now seen corresponding path program 1 times [2022-11-23 13:48:41,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:48:41,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000262989] [2022-11-23 13:48:41,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:48:41,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:48:41,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:48:41,551 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 19 proven. 27 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-23 13:48:41,551 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:48:41,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000262989] [2022-11-23 13:48:41,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000262989] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:48:41,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888076749] [2022-11-23 13:48:41,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:48:41,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:48:41,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:48:41,553 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:48:41,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-23 13:48:41,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:48:41,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 13:48:41,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:48:41,741 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 13:48:41,741 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:48:41,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888076749] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:48:41,741 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 13:48:41,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-23 13:48:41,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871555475] [2022-11-23 13:48:41,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:48:41,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:48:41,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:48:41,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:48:41,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-23 13:48:41,743 INFO L87 Difference]: Start difference. First operand 7809 states and 10524 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-23 13:48:43,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:48:43,169 INFO L93 Difference]: Finished difference Result 12522 states and 17554 transitions. [2022-11-23 13:48:43,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:48:43,170 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 112 [2022-11-23 13:48:43,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:48:43,192 INFO L225 Difference]: With dead ends: 12522 [2022-11-23 13:48:43,192 INFO L226 Difference]: Without dead ends: 7829 [2022-11-23 13:48:43,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-23 13:48:43,206 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 90 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 412 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 13:48:43,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 412 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:48:43,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7829 states. [2022-11-23 13:48:44,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7829 to 7757. [2022-11-23 13:48:44,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7757 states, 6080 states have (on average 1.3245065789473685) internal successors, (8053), 6125 states have internal predecessors, (8053), 955 states have call successors, (955), 698 states have call predecessors, (955), 720 states have return successors, (1304), 935 states have call predecessors, (1304), 954 states have call successors, (1304) [2022-11-23 13:48:44,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7757 states to 7757 states and 10312 transitions. [2022-11-23 13:48:44,322 INFO L78 Accepts]: Start accepts. Automaton has 7757 states and 10312 transitions. Word has length 112 [2022-11-23 13:48:44,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:48:44,323 INFO L495 AbstractCegarLoop]: Abstraction has 7757 states and 10312 transitions. [2022-11-23 13:48:44,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-23 13:48:44,323 INFO L276 IsEmpty]: Start isEmpty. Operand 7757 states and 10312 transitions. [2022-11-23 13:48:44,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-23 13:48:44,331 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:48:44,331 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:48:44,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-23 13:48:44,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-23 13:48:44,532 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:48:44,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:48:44,532 INFO L85 PathProgramCache]: Analyzing trace with hash -651480987, now seen corresponding path program 1 times [2022-11-23 13:48:44,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:48:44,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362568227] [2022-11-23 13:48:44,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:48:44,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:48:44,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:48:44,704 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 19 proven. 25 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-23 13:48:44,705 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:48:44,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362568227] [2022-11-23 13:48:44,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362568227] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:48:44,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69184275] [2022-11-23 13:48:44,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:48:44,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:48:44,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:48:44,707 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:48:44,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-23 13:48:44,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:48:44,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 13:48:44,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:48:44,915 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-23 13:48:44,915 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:48:44,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69184275] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:48:44,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 13:48:44,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-11-23 13:48:44,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79059582] [2022-11-23 13:48:44,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:48:44,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 13:48:44,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:48:44,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 13:48:44,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-23 13:48:44,917 INFO L87 Difference]: Start difference. First operand 7757 states and 10312 transitions. Second operand has 6 states, 5 states have (on average 14.4) internal successors, (72), 6 states have internal predecessors, (72), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-23 13:48:46,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:48:46,600 INFO L93 Difference]: Finished difference Result 17307 states and 23235 transitions. [2022-11-23 13:48:46,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 13:48:46,600 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 14.4) internal successors, (72), 6 states have internal predecessors, (72), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 112 [2022-11-23 13:48:46,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:48:46,620 INFO L225 Difference]: With dead ends: 17307 [2022-11-23 13:48:46,620 INFO L226 Difference]: Without dead ends: 10719 [2022-11-23 13:48:46,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-23 13:48:46,631 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 380 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 13:48:46,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [402 Valid, 395 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 13:48:46,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10719 states. [2022-11-23 13:48:48,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10719 to 10717. [2022-11-23 13:48:48,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10717 states, 8418 states have (on average 1.3042290330244715) internal successors, (10979), 8478 states have internal predecessors, (10979), 1314 states have call successors, (1314), 961 states have call predecessors, (1314), 983 states have return successors, (1794), 1279 states have call predecessors, (1794), 1313 states have call successors, (1794) [2022-11-23 13:48:48,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10717 states to 10717 states and 14087 transitions. [2022-11-23 13:48:48,125 INFO L78 Accepts]: Start accepts. Automaton has 10717 states and 14087 transitions. Word has length 112 [2022-11-23 13:48:48,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:48:48,125 INFO L495 AbstractCegarLoop]: Abstraction has 10717 states and 14087 transitions. [2022-11-23 13:48:48,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 14.4) internal successors, (72), 6 states have internal predecessors, (72), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-23 13:48:48,125 INFO L276 IsEmpty]: Start isEmpty. Operand 10717 states and 14087 transitions. [2022-11-23 13:48:48,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-23 13:48:48,133 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:48:48,133 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:48:48,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-23 13:48:48,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-23 13:48:48,335 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:48:48,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:48:48,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1843676902, now seen corresponding path program 1 times [2022-11-23 13:48:48,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:48:48,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940314093] [2022-11-23 13:48:48,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:48:48,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:48:48,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:48:48,422 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-23 13:48:48,422 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:48:48,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940314093] [2022-11-23 13:48:48,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940314093] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:48:48,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285437873] [2022-11-23 13:48:48,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:48:48,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:48:48,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:48:48,424 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:48:48,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-23 13:48:48,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:48:48,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 13:48:48,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:48:48,588 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-23 13:48:48,589 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:48:48,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285437873] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:48:48,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 13:48:48,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-23 13:48:48,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322746801] [2022-11-23 13:48:48,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:48:48,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:48:48,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:48:48,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:48:48,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 13:48:48,596 INFO L87 Difference]: Start difference. First operand 10717 states and 14087 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-23 13:48:50,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:48:50,598 INFO L93 Difference]: Finished difference Result 19525 states and 26071 transitions. [2022-11-23 13:48:50,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:48:50,599 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 115 [2022-11-23 13:48:50,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:48:50,633 INFO L225 Difference]: With dead ends: 19525 [2022-11-23 13:48:50,633 INFO L226 Difference]: Without dead ends: 13155 [2022-11-23 13:48:50,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 13:48:50,651 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 64 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:48:50,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 414 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:48:50,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13155 states. [2022-11-23 13:48:52,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13155 to 11865. [2022-11-23 13:48:52,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11865 states, 9390 states have (on average 1.3121405750798723) internal successors, (12321), 9450 states have internal predecessors, (12321), 1402 states have call successors, (1402), 1049 states have call predecessors, (1402), 1071 states have return successors, (1882), 1367 states have call predecessors, (1882), 1401 states have call successors, (1882) [2022-11-23 13:48:52,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11865 states to 11865 states and 15605 transitions. [2022-11-23 13:48:52,355 INFO L78 Accepts]: Start accepts. Automaton has 11865 states and 15605 transitions. Word has length 115 [2022-11-23 13:48:52,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:48:52,356 INFO L495 AbstractCegarLoop]: Abstraction has 11865 states and 15605 transitions. [2022-11-23 13:48:52,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-23 13:48:52,356 INFO L276 IsEmpty]: Start isEmpty. Operand 11865 states and 15605 transitions. [2022-11-23 13:48:52,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-23 13:48:52,367 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:48:52,368 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:48:52,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-23 13:48:52,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:48:52,568 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:48:52,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:48:52,569 INFO L85 PathProgramCache]: Analyzing trace with hash -332806758, now seen corresponding path program 1 times [2022-11-23 13:48:52,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:48:52,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559794839] [2022-11-23 13:48:52,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:48:52,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:48:52,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:48:52,693 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-23 13:48:52,693 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:48:52,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559794839] [2022-11-23 13:48:52,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559794839] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:48:52,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147796669] [2022-11-23 13:48:52,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:48:52,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:48:52,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:48:52,695 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:48:52,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-23 13:48:52,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:48:52,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 13:48:52,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:48:52,927 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-23 13:48:52,927 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:48:52,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147796669] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:48:52,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 13:48:52,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2022-11-23 13:48:52,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449493120] [2022-11-23 13:48:52,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:48:52,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 13:48:52,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:48:52,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 13:48:52,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 13:48:52,931 INFO L87 Difference]: Start difference. First operand 11865 states and 15605 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-23 13:48:54,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:48:54,486 INFO L93 Difference]: Finished difference Result 17502 states and 22962 transitions. [2022-11-23 13:48:54,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 13:48:54,487 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 116 [2022-11-23 13:48:54,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:48:54,514 INFO L225 Difference]: With dead ends: 17502 [2022-11-23 13:48:54,515 INFO L226 Difference]: Without dead ends: 12336 [2022-11-23 13:48:54,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 118 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 13:48:54,525 INFO L413 NwaCegarLoop]: 239 mSDtfsCounter, 192 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:48:54,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 561 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:48:54,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12336 states. [2022-11-23 13:48:56,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12336 to 12107. [2022-11-23 13:48:56,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12107 states, 9585 states have (on average 1.309754825247783) internal successors, (12554), 9663 states have internal predecessors, (12554), 1409 states have call successors, (1409), 1053 states have call predecessors, (1409), 1111 states have return successors, (1943), 1392 states have call predecessors, (1943), 1408 states have call successors, (1943) [2022-11-23 13:48:56,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12107 states to 12107 states and 15906 transitions. [2022-11-23 13:48:56,067 INFO L78 Accepts]: Start accepts. Automaton has 12107 states and 15906 transitions. Word has length 116 [2022-11-23 13:48:56,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:48:56,068 INFO L495 AbstractCegarLoop]: Abstraction has 12107 states and 15906 transitions. [2022-11-23 13:48:56,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-23 13:48:56,068 INFO L276 IsEmpty]: Start isEmpty. Operand 12107 states and 15906 transitions. [2022-11-23 13:48:56,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-23 13:48:56,081 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:48:56,081 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:48:56,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-23 13:48:56,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:48:56,283 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:48:56,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:48:56,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1522491441, now seen corresponding path program 1 times [2022-11-23 13:48:56,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:48:56,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628181244] [2022-11-23 13:48:56,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:48:56,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:48:56,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:48:56,349 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 28 proven. 11 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-23 13:48:56,349 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:48:56,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628181244] [2022-11-23 13:48:56,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628181244] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:48:56,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740841145] [2022-11-23 13:48:56,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:48:56,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:48:56,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:48:56,351 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:48:56,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-23 13:48:56,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:48:56,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 13:48:56,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:48:56,503 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-23 13:48:56,503 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:48:56,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740841145] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:48:56,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 13:48:56,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-11-23 13:48:56,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863523453] [2022-11-23 13:48:56,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:48:56,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:48:56,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:48:56,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:48:56,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 13:48:56,505 INFO L87 Difference]: Start difference. First operand 12107 states and 15906 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-23 13:48:58,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:48:58,253 INFO L93 Difference]: Finished difference Result 17219 states and 22776 transitions. [2022-11-23 13:48:58,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:48:58,254 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 117 [2022-11-23 13:48:58,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:48:58,276 INFO L225 Difference]: With dead ends: 17219 [2022-11-23 13:48:58,276 INFO L226 Difference]: Without dead ends: 11849 [2022-11-23 13:48:58,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 118 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 13:48:58,286 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 22 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:48:58,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 359 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:48:58,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11849 states. [2022-11-23 13:48:59,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11849 to 11849. [2022-11-23 13:48:59,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11849 states, 9363 states have (on average 1.3094093773363238) internal successors, (12260), 9432 states have internal predecessors, (12260), 1409 states have call successors, (1409), 1053 states have call predecessors, (1409), 1075 states have return successors, (1889), 1365 states have call predecessors, (1889), 1408 states have call successors, (1889) [2022-11-23 13:48:59,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11849 states to 11849 states and 15558 transitions. [2022-11-23 13:48:59,758 INFO L78 Accepts]: Start accepts. Automaton has 11849 states and 15558 transitions. Word has length 117 [2022-11-23 13:48:59,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:48:59,758 INFO L495 AbstractCegarLoop]: Abstraction has 11849 states and 15558 transitions. [2022-11-23 13:48:59,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-23 13:48:59,759 INFO L276 IsEmpty]: Start isEmpty. Operand 11849 states and 15558 transitions. [2022-11-23 13:48:59,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-23 13:48:59,767 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:48:59,767 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:48:59,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-23 13:48:59,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:48:59,968 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:48:59,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:48:59,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1849729441, now seen corresponding path program 1 times [2022-11-23 13:48:59,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:48:59,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597774391] [2022-11-23 13:48:59,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:48:59,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:48:59,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:49:00,104 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 31 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-23 13:49:00,104 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:49:00,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597774391] [2022-11-23 13:49:00,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597774391] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:49:00,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626384314] [2022-11-23 13:49:00,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:49:00,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:49:00,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:49:00,106 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:49:00,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-23 13:49:00,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:49:00,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 13:49:00,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:49:00,310 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 13:49:00,310 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:49:00,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626384314] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:49:00,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 13:49:00,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2022-11-23 13:49:00,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155695351] [2022-11-23 13:49:00,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:49:00,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:49:00,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:49:00,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:49:00,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 13:49:00,312 INFO L87 Difference]: Start difference. First operand 11849 states and 15558 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-23 13:49:01,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:49:01,986 INFO L93 Difference]: Finished difference Result 20838 states and 28005 transitions. [2022-11-23 13:49:01,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:49:01,987 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 117 [2022-11-23 13:49:01,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:49:02,015 INFO L225 Difference]: With dead ends: 20838 [2022-11-23 13:49:02,015 INFO L226 Difference]: Without dead ends: 13356 [2022-11-23 13:49:02,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 119 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 13:49:02,030 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 164 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 13:49:02,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 226 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 13:49:02,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13356 states. [2022-11-23 13:49:03,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13356 to 13216. [2022-11-23 13:49:03,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13216 states, 10622 states have (on average 1.2879871963848617) internal successors, (13681), 10691 states have internal predecessors, (13681), 1422 states have call successors, (1422), 1148 states have call predecessors, (1422), 1170 states have return successors, (2078), 1378 states have call predecessors, (2078), 1421 states have call successors, (2078) [2022-11-23 13:49:03,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13216 states to 13216 states and 17181 transitions. [2022-11-23 13:49:03,696 INFO L78 Accepts]: Start accepts. Automaton has 13216 states and 17181 transitions. Word has length 117 [2022-11-23 13:49:03,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:49:03,697 INFO L495 AbstractCegarLoop]: Abstraction has 13216 states and 17181 transitions. [2022-11-23 13:49:03,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-23 13:49:03,697 INFO L276 IsEmpty]: Start isEmpty. Operand 13216 states and 17181 transitions. [2022-11-23 13:49:03,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-23 13:49:03,707 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:49:03,708 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:49:03,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-23 13:49:03,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-11-23 13:49:03,913 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:49:03,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:49:03,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1005730431, now seen corresponding path program 1 times [2022-11-23 13:49:03,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:49:03,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594084622] [2022-11-23 13:49:03,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:49:03,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:49:03,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:49:03,969 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 30 proven. 5 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-23 13:49:03,969 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:49:03,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594084622] [2022-11-23 13:49:03,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594084622] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:49:03,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491495577] [2022-11-23 13:49:03,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:49:03,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:49:03,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:49:03,971 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:49:03,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-23 13:49:04,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:49:04,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 13:49:04,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:49:04,146 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 13:49:04,146 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:49:04,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491495577] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:49:04,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 13:49:04,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-11-23 13:49:04,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131614032] [2022-11-23 13:49:04,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:49:04,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:49:04,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:49:04,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:49:04,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 13:49:04,148 INFO L87 Difference]: Start difference. First operand 13216 states and 17181 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-23 13:49:05,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:49:05,896 INFO L93 Difference]: Finished difference Result 21600 states and 29005 transitions. [2022-11-23 13:49:05,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:49:05,896 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 117 [2022-11-23 13:49:05,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:49:05,919 INFO L225 Difference]: With dead ends: 21600 [2022-11-23 13:49:05,919 INFO L226 Difference]: Without dead ends: 13191 [2022-11-23 13:49:05,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 118 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 13:49:05,930 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 87 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:49:05,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 424 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:49:05,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13191 states. [2022-11-23 13:49:07,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13191 to 13040. [2022-11-23 13:49:07,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13040 states, 10446 states have (on average 1.2604824813325675) internal successors, (13167), 10515 states have internal predecessors, (13167), 1422 states have call successors, (1422), 1148 states have call predecessors, (1422), 1170 states have return successors, (2078), 1378 states have call predecessors, (2078), 1421 states have call successors, (2078) [2022-11-23 13:49:07,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13040 states to 13040 states and 16667 transitions. [2022-11-23 13:49:07,594 INFO L78 Accepts]: Start accepts. Automaton has 13040 states and 16667 transitions. Word has length 117 [2022-11-23 13:49:07,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:49:07,594 INFO L495 AbstractCegarLoop]: Abstraction has 13040 states and 16667 transitions. [2022-11-23 13:49:07,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-23 13:49:07,595 INFO L276 IsEmpty]: Start isEmpty. Operand 13040 states and 16667 transitions. [2022-11-23 13:49:07,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-23 13:49:07,607 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:49:07,608 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:49:07,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-23 13:49:07,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-23 13:49:07,814 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:49:07,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:49:07,814 INFO L85 PathProgramCache]: Analyzing trace with hash 2061203851, now seen corresponding path program 1 times [2022-11-23 13:49:07,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:49:07,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042153922] [2022-11-23 13:49:07,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:49:07,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:49:07,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:49:08,283 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-23 13:49:08,283 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:49:08,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042153922] [2022-11-23 13:49:08,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042153922] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:49:08,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:49:08,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-23 13:49:08,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41608771] [2022-11-23 13:49:08,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:49:08,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-23 13:49:08,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:49:08,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-23 13:49:08,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-23 13:49:08,285 INFO L87 Difference]: Start difference. First operand 13040 states and 16667 transitions. Second operand has 11 states, 8 states have (on average 8.75) internal successors, (70), 9 states have internal predecessors, (70), 6 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-23 13:49:13,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:49:13,016 INFO L93 Difference]: Finished difference Result 35890 states and 47411 transitions. [2022-11-23 13:49:13,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-23 13:49:13,017 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 8.75) internal successors, (70), 9 states have internal predecessors, (70), 6 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) Word has length 114 [2022-11-23 13:49:13,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:49:13,070 INFO L225 Difference]: With dead ends: 35890 [2022-11-23 13:49:13,070 INFO L226 Difference]: Without dead ends: 25312 [2022-11-23 13:49:13,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2022-11-23 13:49:13,092 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 966 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 951 mSolverCounterSat, 357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 992 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 1308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 357 IncrementalHoareTripleChecker+Valid, 951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-23 13:49:13,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [992 Valid, 566 Invalid, 1308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [357 Valid, 951 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-23 13:49:13,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25312 states. [2022-11-23 13:49:16,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25312 to 22073. [2022-11-23 13:49:16,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22073 states, 17934 states have (on average 1.2524255603880896) internal successors, (22461), 18045 states have internal predecessors, (22461), 2238 states have call successors, (2238), 1871 states have call predecessors, (2238), 1899 states have return successors, (3260), 2158 states have call predecessors, (3260), 2237 states have call successors, (3260) [2022-11-23 13:49:16,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22073 states to 22073 states and 27959 transitions. [2022-11-23 13:49:16,262 INFO L78 Accepts]: Start accepts. Automaton has 22073 states and 27959 transitions. Word has length 114 [2022-11-23 13:49:16,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:49:16,262 INFO L495 AbstractCegarLoop]: Abstraction has 22073 states and 27959 transitions. [2022-11-23 13:49:16,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 8.75) internal successors, (70), 9 states have internal predecessors, (70), 6 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-23 13:49:16,263 INFO L276 IsEmpty]: Start isEmpty. Operand 22073 states and 27959 transitions. [2022-11-23 13:49:16,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-23 13:49:16,273 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:49:16,273 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:49:16,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-11-23 13:49:16,273 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:49:16,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:49:16,273 INFO L85 PathProgramCache]: Analyzing trace with hash 46418609, now seen corresponding path program 1 times [2022-11-23 13:49:16,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:49:16,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787148601] [2022-11-23 13:49:16,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:49:16,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:49:16,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:49:16,462 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-23 13:49:16,463 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:49:16,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787148601] [2022-11-23 13:49:16,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787148601] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:49:16,463 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:49:16,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 13:49:16,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654337629] [2022-11-23 13:49:16,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:49:16,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 13:49:16,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:49:16,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 13:49:16,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 13:49:16,465 INFO L87 Difference]: Start difference. First operand 22073 states and 27959 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-23 13:49:20,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:49:20,919 INFO L93 Difference]: Finished difference Result 44532 states and 56161 transitions. [2022-11-23 13:49:20,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 13:49:20,919 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 115 [2022-11-23 13:49:20,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:49:20,963 INFO L225 Difference]: With dead ends: 44532 [2022-11-23 13:49:20,963 INFO L226 Difference]: Without dead ends: 19903 [2022-11-23 13:49:20,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-23 13:49:20,994 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 120 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 13:49:20,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 582 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 13:49:21,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19903 states. [2022-11-23 13:49:23,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19903 to 19046. [2022-11-23 13:49:24,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19046 states, 15268 states have (on average 1.2196096410793817) internal successors, (18621), 15391 states have internal predecessors, (18621), 2056 states have call successors, (2056), 1698 states have call predecessors, (2056), 1720 states have return successors, (2738), 1958 states have call predecessors, (2738), 2055 states have call successors, (2738) [2022-11-23 13:49:24,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19046 states to 19046 states and 23415 transitions. [2022-11-23 13:49:24,038 INFO L78 Accepts]: Start accepts. Automaton has 19046 states and 23415 transitions. Word has length 115 [2022-11-23 13:49:24,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:49:24,039 INFO L495 AbstractCegarLoop]: Abstraction has 19046 states and 23415 transitions. [2022-11-23 13:49:24,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-23 13:49:24,039 INFO L276 IsEmpty]: Start isEmpty. Operand 19046 states and 23415 transitions. [2022-11-23 13:49:24,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-23 13:49:24,047 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:49:24,047 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:49:24,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-11-23 13:49:24,047 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:49:24,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:49:24,048 INFO L85 PathProgramCache]: Analyzing trace with hash 767769446, now seen corresponding path program 1 times [2022-11-23 13:49:24,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:49:24,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191821856] [2022-11-23 13:49:24,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:49:24,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:49:24,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:49:24,214 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 41 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-23 13:49:24,215 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:49:24,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191821856] [2022-11-23 13:49:24,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191821856] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:49:24,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170851357] [2022-11-23 13:49:24,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:49:24,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:49:24,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:49:24,217 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:49:24,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-23 13:49:24,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:49:24,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-23 13:49:24,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:49:24,438 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:49:24,438 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:49:24,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170851357] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:49:24,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 13:49:24,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2022-11-23 13:49:24,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650939698] [2022-11-23 13:49:24,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:49:24,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 13:49:24,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:49:24,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 13:49:24,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 13:49:24,443 INFO L87 Difference]: Start difference. First operand 19046 states and 23415 transitions. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-23 13:49:28,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:49:28,709 INFO L93 Difference]: Finished difference Result 39065 states and 48550 transitions. [2022-11-23 13:49:28,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 13:49:28,709 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 116 [2022-11-23 13:49:28,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:49:28,752 INFO L225 Difference]: With dead ends: 39065 [2022-11-23 13:49:28,752 INFO L226 Difference]: Without dead ends: 25732 [2022-11-23 13:49:28,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-23 13:49:28,766 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 222 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 13:49:28,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 539 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 13:49:28,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25732 states. [2022-11-23 13:49:32,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25732 to 24258. [2022-11-23 13:49:32,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24258 states, 19411 states have (on average 1.2069445159960848) internal successors, (23428), 19548 states have internal predecessors, (23428), 2666 states have call successors, (2666), 2173 states have call predecessors, (2666), 2179 states have return successors, (3773), 2538 states have call predecessors, (3773), 2665 states have call successors, (3773) [2022-11-23 13:49:32,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24258 states to 24258 states and 29867 transitions. [2022-11-23 13:49:32,635 INFO L78 Accepts]: Start accepts. Automaton has 24258 states and 29867 transitions. Word has length 116 [2022-11-23 13:49:32,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:49:32,635 INFO L495 AbstractCegarLoop]: Abstraction has 24258 states and 29867 transitions. [2022-11-23 13:49:32,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-23 13:49:32,636 INFO L276 IsEmpty]: Start isEmpty. Operand 24258 states and 29867 transitions. [2022-11-23 13:49:32,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-23 13:49:32,642 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:49:32,643 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 13:49:32,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-23 13:49:32,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-23 13:49:32,843 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:49:32,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:49:32,844 INFO L85 PathProgramCache]: Analyzing trace with hash -480707774, now seen corresponding path program 1 times [2022-11-23 13:49:32,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:49:32,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149357772] [2022-11-23 13:49:32,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:49:32,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:49:32,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:49:33,652 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 27 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-23 13:49:33,653 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:49:33,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149357772] [2022-11-23 13:49:33,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149357772] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:49:33,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788538427] [2022-11-23 13:49:33,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:49:33,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:49:33,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:49:33,654 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:49:33,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-23 13:49:33,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:49:33,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-23 13:49:33,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:49:34,716 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 13:49:34,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:49:36,630 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 13:49:36,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788538427] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:49:36,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [9344853] [2022-11-23 13:49:36,634 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2022-11-23 13:49:36,634 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 13:49:36,635 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 13:49:36,635 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 13:49:36,635 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 13:49:43,663 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 192 for LOIs [2022-11-23 13:49:44,059 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 140 for LOIs [2022-11-23 13:49:44,084 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 70 for LOIs [2022-11-23 13:49:44,091 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 204 for LOIs [2022-11-23 13:49:45,129 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 122 for LOIs [2022-11-23 13:49:45,270 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 70 for LOIs [2022-11-23 13:49:45,379 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 196 for LOIs [2022-11-23 13:49:45,901 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 219 for LOIs [2022-11-23 13:49:46,154 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 13:50:17,681 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '805538#(and (= ~q_req_up~0 1) (<= 0 ~p_dw_st~0) (= ~T1_E~0 2) (<= 2 ~T3_E~0) (<= 0 ~p_dw_pc~0) (<= ~t2_st~0 0) (= ~q_free~0 1) (<= ~E_2~0 2) (<= 0 ~p_num_write~0) (<= ~token~0 0) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (<= ~p_dw_st~0 2) (= ~E_3~0 2) (<= ~t1_pc~0 0) (<= 2 ~M_E~0) (<= |#NULL.offset| 0) (= ~c_dr_pc~0 1) (<= 2 ~E_2~0) (= ~m_i~0 0) (<= ~t2_i~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (<= ~T3_E~0 2) (<= 0 ~token~0) (<= 0 ~t2_i~0) (= ~c_last_read~0 ~q_buf_0~0) (<= ~t3_st~0 0) (= ~local~0 0) (= ~t3_i~0 0) (<= ~c_num_read~0 1) (<= 0 ~t3_st~0) (<= ~m_pc~0 0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (<= ~M_E~0 2) (<= ~m_st~0 0) (<= ~t3_pc~0 0) (= ~c_last_read~0 ~p_last_write~0) (<= 0 ~m_pc~0) (= ~E_M~0 2) (<= 0 ~t2_st~0) (<= 0 ~t3_pc~0) (<= 1 ~c_num_read~0) (<= 0 ~m_st~0) (<= 0 |#NULL.offset|) (= ~E_1~0 2) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (= ~c_dr_st~0 1) (<= 0 ~t1_st~0) (<= 0 ~t1_pc~0) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-23 13:50:17,681 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 13:50:17,681 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:50:17,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 18, 18] total 55 [2022-11-23 13:50:17,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229653301] [2022-11-23 13:50:17,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 13:50:17,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-23 13:50:17,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:50:17,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-23 13:50:17,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=964, Invalid=11246, Unknown=0, NotChecked=0, Total=12210 [2022-11-23 13:50:17,685 INFO L87 Difference]: Start difference. First operand 24258 states and 29867 transitions. Second operand has 55 states, 36 states have (on average 5.944444444444445) internal successors, (214), 40 states have internal predecessors, (214), 25 states have call successors, (49), 17 states have call predecessors, (49), 22 states have return successors, (51), 24 states have call predecessors, (51), 25 states have call successors, (51) [2022-11-23 13:50:39,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:50:39,262 INFO L93 Difference]: Finished difference Result 26542 states and 32569 transitions. [2022-11-23 13:50:39,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2022-11-23 13:50:39,263 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 36 states have (on average 5.944444444444445) internal successors, (214), 40 states have internal predecessors, (214), 25 states have call successors, (49), 17 states have call predecessors, (49), 22 states have return successors, (51), 24 states have call predecessors, (51), 25 states have call successors, (51) Word has length 124 [2022-11-23 13:50:39,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:50:39,313 INFO L225 Difference]: With dead ends: 26542 [2022-11-23 13:50:39,313 INFO L226 Difference]: Without dead ends: 25471 [2022-11-23 13:50:39,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 584 GetRequests, 318 SyntacticMatches, 6 SemanticMatches, 260 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26825 ImplicationChecksByTransitivity, 42.8s TimeCoverageRelationStatistics Valid=6762, Invalid=61620, Unknown=0, NotChecked=0, Total=68382 [2022-11-23 13:50:39,327 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 5058 mSDsluCounter, 2617 mSDsCounter, 0 mSdLazyCounter, 8433 mSolverCounterSat, 3514 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5058 SdHoareTripleChecker+Valid, 2796 SdHoareTripleChecker+Invalid, 11947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3514 IncrementalHoareTripleChecker+Valid, 8433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-11-23 13:50:39,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5058 Valid, 2796 Invalid, 11947 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3514 Valid, 8433 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2022-11-23 13:50:39,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25471 states. [2022-11-23 13:50:43,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25471 to 24074. [2022-11-23 13:50:43,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24074 states, 19299 states have (on average 1.2073164412663868) internal successors, (23300), 19435 states have internal predecessors, (23300), 2626 states have call successors, (2626), 2141 states have call predecessors, (2626), 2147 states have return successors, (3723), 2499 states have call predecessors, (3723), 2625 states have call successors, (3723) [2022-11-23 13:50:43,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24074 states to 24074 states and 29649 transitions. [2022-11-23 13:50:43,193 INFO L78 Accepts]: Start accepts. Automaton has 24074 states and 29649 transitions. Word has length 124 [2022-11-23 13:50:43,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:50:43,194 INFO L495 AbstractCegarLoop]: Abstraction has 24074 states and 29649 transitions. [2022-11-23 13:50:43,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 36 states have (on average 5.944444444444445) internal successors, (214), 40 states have internal predecessors, (214), 25 states have call successors, (49), 17 states have call predecessors, (49), 22 states have return successors, (51), 24 states have call predecessors, (51), 25 states have call successors, (51) [2022-11-23 13:50:43,194 INFO L276 IsEmpty]: Start isEmpty. Operand 24074 states and 29649 transitions. [2022-11-23 13:50:43,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-23 13:50:43,201 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:50:43,201 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 13:50:43,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-23 13:50:43,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-23 13:50:43,402 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:50:43,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:50:43,402 INFO L85 PathProgramCache]: Analyzing trace with hash 300997334, now seen corresponding path program 1 times [2022-11-23 13:50:43,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:50:43,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662290054] [2022-11-23 13:50:43,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:50:43,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:50:43,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:50:43,588 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 13:50:43,588 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:50:43,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662290054] [2022-11-23 13:50:43,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662290054] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:50:43,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703419774] [2022-11-23 13:50:43,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:50:43,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:50:43,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:50:43,591 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:50:43,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-23 13:50:43,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:50:43,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-23 13:50:43,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:50:43,865 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 13:50:43,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:50:44,091 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 13:50:44,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703419774] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 13:50:44,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 13:50:44,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 10] total 17 [2022-11-23 13:50:44,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004419549] [2022-11-23 13:50:44,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:50:44,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 13:50:44,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:50:44,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 13:50:44,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-23 13:50:44,094 INFO L87 Difference]: Start difference. First operand 24074 states and 29649 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 13:50:48,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:50:48,917 INFO L93 Difference]: Finished difference Result 24729 states and 30390 transitions. [2022-11-23 13:50:48,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-23 13:50:48,917 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 13:50:48,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:50:48,970 INFO L225 Difference]: With dead ends: 24729 [2022-11-23 13:50:48,970 INFO L226 Difference]: Without dead ends: 23842 [2022-11-23 13:50:48,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2022-11-23 13:50:48,978 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 408 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 13:50:48,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [410 Valid, 533 Invalid, 835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 697 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 13:50:48,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23842 states. [2022-11-23 13:50:52,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23842 to 23805. [2022-11-23 13:50:52,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23805 states, 19100 states have (on average 1.2070680628272252) internal successors, (23055), 19236 states have internal predecessors, (23055), 2590 states have call successors, (2590), 2111 states have call predecessors, (2590), 2113 states have return successors, (3682), 2459 states have call predecessors, (3682), 2589 states have call successors, (3682) [2022-11-23 13:50:52,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23805 states to 23805 states and 29327 transitions. [2022-11-23 13:50:52,945 INFO L78 Accepts]: Start accepts. Automaton has 23805 states and 29327 transitions. Word has length 125 [2022-11-23 13:50:52,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:50:52,945 INFO L495 AbstractCegarLoop]: Abstraction has 23805 states and 29327 transitions. [2022-11-23 13:50:52,945 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 13:50:52,946 INFO L276 IsEmpty]: Start isEmpty. Operand 23805 states and 29327 transitions. [2022-11-23 13:50:52,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-23 13:50:52,957 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:50:52,957 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:50:52,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-23 13:50:53,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-23 13:50:53,158 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:50:53,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:50:53,158 INFO L85 PathProgramCache]: Analyzing trace with hash 2075686238, now seen corresponding path program 1 times [2022-11-23 13:50:53,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:50:53,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093733536] [2022-11-23 13:50:53,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:50:53,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:50:53,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:50:53,293 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 31 proven. 19 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-23 13:50:53,293 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:50:53,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093733536] [2022-11-23 13:50:53,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093733536] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:50:53,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882865987] [2022-11-23 13:50:53,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:50:53,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:50:53,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:50:53,295 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:50:53,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-23 13:50:53,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:50:53,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 13:50:53,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:50:53,542 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-23 13:50:53,543 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:50:53,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882865987] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:50:53,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 13:50:53,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2022-11-23 13:50:53,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661701601] [2022-11-23 13:50:53,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:50:53,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:50:53,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:50:53,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:50:53,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 13:50:53,545 INFO L87 Difference]: Start difference. First operand 23805 states and 29327 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-23 13:50:58,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:50:58,151 INFO L93 Difference]: Finished difference Result 42701 states and 53690 transitions. [2022-11-23 13:50:58,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:50:58,152 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 141 [2022-11-23 13:50:58,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:50:58,209 INFO L225 Difference]: With dead ends: 42701 [2022-11-23 13:50:58,209 INFO L226 Difference]: Without dead ends: 26600 [2022-11-23 13:50:58,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 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 13:50:58,233 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 165 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 13:50:58,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 226 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 13:50:58,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26600 states. [2022-11-23 13:51:02,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26600 to 25780. [2022-11-23 13:51:02,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25780 states, 20892 states have (on average 1.185669155657668) internal successors, (24771), 21121 states have internal predecessors, (24771), 2590 states have call successors, (2590), 2186 states have call predecessors, (2590), 2296 states have return successors, (3884), 2474 states have call predecessors, (3884), 2589 states have call successors, (3884) [2022-11-23 13:51:02,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25780 states to 25780 states and 31245 transitions. [2022-11-23 13:51:02,798 INFO L78 Accepts]: Start accepts. Automaton has 25780 states and 31245 transitions. Word has length 141 [2022-11-23 13:51:02,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:51:02,798 INFO L495 AbstractCegarLoop]: Abstraction has 25780 states and 31245 transitions. [2022-11-23 13:51:02,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-23 13:51:02,798 INFO L276 IsEmpty]: Start isEmpty. Operand 25780 states and 31245 transitions. [2022-11-23 13:51:02,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-23 13:51:02,810 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:51:02,810 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:51:02,815 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-11-23 13:51:03,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:51:03,011 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:51:03,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:51:03,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1258180528, now seen corresponding path program 1 times [2022-11-23 13:51:03,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:51:03,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206932312] [2022-11-23 13:51:03,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:51:03,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:51:03,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:51:03,231 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 43 proven. 36 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-11-23 13:51:03,231 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:51:03,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206932312] [2022-11-23 13:51:03,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206932312] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:51:03,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489110397] [2022-11-23 13:51:03,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:51:03,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:51:03,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:51:03,233 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:51:03,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-23 13:51:03,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:51:03,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 703 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-23 13:51:03,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:51:03,488 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-23 13:51:03,488 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:51:03,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489110397] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:51:03,489 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 13:51:03,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2022-11-23 13:51:03,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193799167] [2022-11-23 13:51:03,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:51:03,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 13:51:03,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:51:03,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 13:51:03,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 13:51:03,490 INFO L87 Difference]: Start difference. First operand 25780 states and 31245 transitions. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-23 13:51:09,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:51:09,659 INFO L93 Difference]: Finished difference Result 51013 states and 62498 transitions. [2022-11-23 13:51:09,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 13:51:09,660 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 144 [2022-11-23 13:51:09,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:51:09,724 INFO L225 Difference]: With dead ends: 51013 [2022-11-23 13:51:09,724 INFO L226 Difference]: Without dead ends: 33309 [2022-11-23 13:51:09,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-23 13:51:09,747 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 236 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 13:51:09,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 531 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 13:51:09,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33309 states. [2022-11-23 13:51:15,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33309 to 31635. [2022-11-23 13:51:15,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31635 states, 25583 states have (on average 1.1759371457608567) internal successors, (30084), 25881 states have internal predecessors, (30084), 3224 states have call successors, (3224), 2694 states have call predecessors, (3224), 2826 states have return successors, (5177), 3061 states have call predecessors, (5177), 3223 states have call successors, (5177) [2022-11-23 13:51:15,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31635 states to 31635 states and 38485 transitions. [2022-11-23 13:51:15,779 INFO L78 Accepts]: Start accepts. Automaton has 31635 states and 38485 transitions. Word has length 144 [2022-11-23 13:51:15,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:51:15,780 INFO L495 AbstractCegarLoop]: Abstraction has 31635 states and 38485 transitions. [2022-11-23 13:51:15,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-23 13:51:15,780 INFO L276 IsEmpty]: Start isEmpty. Operand 31635 states and 38485 transitions. [2022-11-23 13:51:15,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-11-23 13:51:15,796 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:51:15,796 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:51:15,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-23 13:51:15,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-11-23 13:51:15,996 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:51:15,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:51:15,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1919255000, now seen corresponding path program 1 times [2022-11-23 13:51:15,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:51:15,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33106511] [2022-11-23 13:51:15,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:51:15,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:51:16,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:51:16,799 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 30 proven. 73 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-23 13:51:16,799 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:51:16,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33106511] [2022-11-23 13:51:16,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33106511] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:51:16,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837766359] [2022-11-23 13:51:16,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:51:16,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:51:16,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:51:16,802 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:51:16,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-23 13:51:17,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:51:17,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 793 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-23 13:51:17,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:51:17,192 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 112 proven. 14 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-23 13:51:17,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:51:17,505 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 34 proven. 4 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-11-23 13:51:17,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837766359] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:51:17,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1716964101] [2022-11-23 13:51:17,509 INFO L159 IcfgInterpreter]: Started Sifa with 74 locations of interest [2022-11-23 13:51:17,509 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 13:51:17,510 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 13:51:17,510 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 13:51:17,510 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 13:51:44,848 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 204 for LOIs [2022-11-23 13:52:02,240 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 70 for LOIs [2022-11-23 13:52:02,252 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 212 for LOIs [2022-11-23 13:52:02,336 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 70 for LOIs [2022-11-23 13:52:02,510 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 70 for LOIs [2022-11-23 13:52:03,392 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 244 for LOIs [2022-11-23 13:52:15,699 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 13:52:39,853 WARN L233 SmtUtils]: Spent 21.62s on a formula simplification. DAG size of input: 425 DAG size of output: 375 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 13:52:59,252 WARN L233 SmtUtils]: Spent 8.74s on a formula simplification. DAG size of input: 482 DAG size of output: 338 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 13:53:19,827 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1156037#(and (= ~p_dw_pc~0 0) (= ~c_dr_st~0 0) (= ~p_num_write~0 0) (<= ~local~0 2147483647) (= ~c_num_read~0 0) (= ~q_buf_0~0 0) (= ~t1_pc~0 0) (= ~t1_i~0 1) (= ~p_last_write~0 0) (<= 0 (+ ~local~0 2147483648)) (<= 0 (+ |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 2147483648)) (= ~c_last_read~0 0) (= 0 ~c_dr_i~0) (= ~q_free~0 0) (<= |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 2147483647) (= ~q_req_up~0 0) (= ~q_ev~0 0) (= ~m_pc~0 1) (= ~p_dw_i~0 0) (= ~m_i~0 1) (= |ULTIMATE.start_start_simulation2_~kernel_st~1#1| 1) (<= 0 |ULTIMATE.start_eval2_~tmp~5#1|) (not (= ~token~0 (+ 3 ~local~0))) (<= ~t3_pc~0 1) (<= |ULTIMATE.start_eval2_~tmp~5#1| 1) (= ~p_dw_st~0 0) (= ~t2_i~0 1) (= ~q_write_ev~0 0) (= ~c_dr_pc~0 0) (= 0 ~t2_pc~0) (= ~q_read_ev~0 0) (= ~m_st~0 1) (= |#NULL.offset| 0) (= ~a_t~0 0) (<= 0 ~t3_pc~0) (= ~t3_i~0 1) (<= 0 (+ ~token~0 2147483648)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 13:53:19,827 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 13:53:19,827 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:53:19,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 6] total 21 [2022-11-23 13:53:19,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126074894] [2022-11-23 13:53:19,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 13:53:19,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-23 13:53:19,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:53:19,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-23 13:53:19,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=4987, Unknown=0, NotChecked=0, Total=5402 [2022-11-23 13:53:19,830 INFO L87 Difference]: Start difference. First operand 31635 states and 38485 transitions. Second operand has 21 states, 17 states have (on average 10.529411764705882) internal successors, (179), 19 states have internal predecessors, (179), 9 states have call successors, (36), 5 states have call predecessors, (36), 8 states have return successors, (37), 9 states have call predecessors, (37), 9 states have call successors, (37) [2022-11-23 13:53:30,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:53:30,638 INFO L93 Difference]: Finished difference Result 54377 states and 66315 transitions. [2022-11-23 13:53:30,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-11-23 13:53:30,639 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 10.529411764705882) internal successors, (179), 19 states have internal predecessors, (179), 9 states have call successors, (36), 5 states have call predecessors, (36), 8 states have return successors, (37), 9 states have call predecessors, (37), 9 states have call successors, (37) Word has length 159 [2022-11-23 13:53:30,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:53:30,690 INFO L225 Difference]: With dead ends: 54377 [2022-11-23 13:53:30,690 INFO L226 Difference]: Without dead ends: 23406 [2022-11-23 13:53:30,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 670 GetRequests, 486 SyntacticMatches, 4 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14128 ImplicationChecksByTransitivity, 66.4s TimeCoverageRelationStatistics Valid=1910, Invalid=31032, Unknown=0, NotChecked=0, Total=32942 [2022-11-23 13:53:30,730 INFO L413 NwaCegarLoop]: 335 mSDtfsCounter, 1988 mSDsluCounter, 3674 mSDsCounter, 0 mSdLazyCounter, 4233 mSolverCounterSat, 724 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2007 SdHoareTripleChecker+Valid, 4009 SdHoareTripleChecker+Invalid, 4957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 724 IncrementalHoareTripleChecker+Valid, 4233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-23 13:53:30,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2007 Valid, 4009 Invalid, 4957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [724 Valid, 4233 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-23 13:53:30,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23406 states. [2022-11-23 13:53:34,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23406 to 17072. [2022-11-23 13:53:34,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17072 states, 13810 states have (on average 1.1555394641564083) internal successors, (15958), 13898 states have internal predecessors, (15958), 1706 states have call successors, (1706), 1526 states have call predecessors, (1706), 1554 states have return successors, (2282), 1648 states have call predecessors, (2282), 1705 states have call successors, (2282) [2022-11-23 13:53:34,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17072 states to 17072 states and 19946 transitions. [2022-11-23 13:53:34,422 INFO L78 Accepts]: Start accepts. Automaton has 17072 states and 19946 transitions. Word has length 159 [2022-11-23 13:53:34,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:53:34,423 INFO L495 AbstractCegarLoop]: Abstraction has 17072 states and 19946 transitions. [2022-11-23 13:53:34,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 10.529411764705882) internal successors, (179), 19 states have internal predecessors, (179), 9 states have call successors, (36), 5 states have call predecessors, (36), 8 states have return successors, (37), 9 states have call predecessors, (37), 9 states have call successors, (37) [2022-11-23 13:53:34,423 INFO L276 IsEmpty]: Start isEmpty. Operand 17072 states and 19946 transitions. [2022-11-23 13:53:34,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-11-23 13:53:34,433 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:53:34,433 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1] [2022-11-23 13:53:34,438 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-11-23 13:53:34,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-11-23 13:53:34,634 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:53:34,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:53:34,634 INFO L85 PathProgramCache]: Analyzing trace with hash 2021320345, now seen corresponding path program 1 times [2022-11-23 13:53:34,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:53:34,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789856023] [2022-11-23 13:53:34,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:53:34,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:53:34,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:53:34,883 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 33 proven. 38 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-23 13:53:34,883 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:53:34,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789856023] [2022-11-23 13:53:34,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789856023] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:53:34,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882825048] [2022-11-23 13:53:34,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:53:34,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:53:34,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:53:34,886 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:53:34,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c667014-1bf6-43c9-9569-8782e687b89b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-23 13:53:35,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:53:35,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-23 13:53:35,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:53:35,232 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 111 proven. 14 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-23 13:53:35,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:53:35,593 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 33 proven. 4 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-11-23 13:53:35,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882825048] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:53:35,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1735501646] [2022-11-23 13:53:35,596 INFO L159 IcfgInterpreter]: Started Sifa with 77 locations of interest [2022-11-23 13:53:35,597 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 13:53:35,597 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 13:53:35,598 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 13:53:35,598 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs