./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 5e519f3a 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_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/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_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI --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-5e519f3 [2022-11-03 03:59:37,743 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:59:37,746 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:59:37,800 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:59:37,801 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:59:37,805 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:59:37,807 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:59:37,810 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:59:37,815 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:59:37,820 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:59:37,821 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:59:37,824 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:59:37,824 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:59:37,826 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:59:37,828 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:59:37,830 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:59:37,831 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:59:37,832 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:59:37,834 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:59:37,841 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:59:37,842 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:59:37,843 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:59:37,846 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:59:37,847 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:59:37,856 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:59:37,856 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:59:37,856 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:59:37,857 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:59:37,858 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:59:37,859 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:59:37,859 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:59:37,862 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:59:37,863 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:59:37,865 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:59:37,866 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:59:37,866 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:59:37,867 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:59:37,867 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:59:37,867 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:59:37,868 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:59:37,868 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:59:37,869 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 03:59:37,902 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:59:37,903 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:59:37,903 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:59:37,903 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:59:37,904 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:59:37,904 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:59:37,904 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:59:37,904 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:59:37,904 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:59:37,904 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:59:37,905 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:59:37,905 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:59:37,905 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:59:37,905 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:59:37,905 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:59:37,906 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:59:37,906 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:59:37,906 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:59:37,907 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:59:37,907 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 03:59:37,907 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:59:37,907 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 03:59:37,907 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:59:37,908 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:59:37,908 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:59:37,908 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:59:37,908 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 03:59:37,908 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:59:37,908 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:59:37,909 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:59:37,909 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:59:37,909 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:59:37,909 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:59:37,910 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:59:37,910 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:59:37,910 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:59:37,910 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:59:37,910 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:59:37,919 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:59:37,920 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:59:37,920 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:59:37,920 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_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4c3aab1156afcb98b97b027e9b66004d54025f3b89e95d6d35dc2e84fdb640d2 [2022-11-03 03:59:38,202 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:59:38,224 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:59:38,227 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:59:38,228 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:59:38,229 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:59:38,230 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.03.cil-2.c [2022-11-03 03:59:38,297 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/data/fbe890911/d4e48e405a1d4c45bd0215332b169664/FLAG4936e0910 [2022-11-03 03:59:38,760 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:59:38,760 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.03.cil-2.c [2022-11-03 03:59:38,772 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/data/fbe890911/d4e48e405a1d4c45bd0215332b169664/FLAG4936e0910 [2022-11-03 03:59:39,113 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/data/fbe890911/d4e48e405a1d4c45bd0215332b169664 [2022-11-03 03:59:39,116 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:59:39,117 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:59:39,119 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:59:39,119 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:59:39,123 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:59:39,124 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:59:39" (1/1) ... [2022-11-03 03:59:39,125 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f7a3ba9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:59:39, skipping insertion in model container [2022-11-03 03:59:39,125 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:59:39" (1/1) ... [2022-11-03 03:59:39,132 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:59:39,184 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:59:39,362 WARN L230 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_01949c93-15e7-4e30-bd82-b23a243e9e1a/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.03.cil-2.c[914,927] [2022-11-03 03:59:39,424 WARN L230 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_01949c93-15e7-4e30-bd82-b23a243e9e1a/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.03.cil-2.c[7115,7128] [2022-11-03 03:59:39,493 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:59:39,510 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:59:39,522 WARN L230 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_01949c93-15e7-4e30-bd82-b23a243e9e1a/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.03.cil-2.c[914,927] [2022-11-03 03:59:39,555 WARN L230 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_01949c93-15e7-4e30-bd82-b23a243e9e1a/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.03.cil-2.c[7115,7128] [2022-11-03 03:59:39,596 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:59:39,617 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:59:39,617 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:59:39 WrapperNode [2022-11-03 03:59:39,617 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:59:39,619 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:59:39,619 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:59:39,620 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:59:39,627 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:59:39" (1/1) ... [2022-11-03 03:59:39,647 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:59:39" (1/1) ... [2022-11-03 03:59:39,685 INFO L138 Inliner]: procedures = 59, calls = 66, calls flagged for inlining = 28, calls inlined = 28, statements flattened = 518 [2022-11-03 03:59:39,685 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:59:39,686 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:59:39,687 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:59:39,687 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:59:39,698 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:59:39" (1/1) ... [2022-11-03 03:59:39,698 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:59:39" (1/1) ... [2022-11-03 03:59:39,702 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:59:39" (1/1) ... [2022-11-03 03:59:39,703 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:59:39" (1/1) ... [2022-11-03 03:59:39,715 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:59:39" (1/1) ... [2022-11-03 03:59:39,741 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:59:39" (1/1) ... [2022-11-03 03:59:39,749 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:59:39" (1/1) ... [2022-11-03 03:59:39,764 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:59:39" (1/1) ... [2022-11-03 03:59:39,769 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:59:39,770 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:59:39,770 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:59:39,770 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:59:39,771 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:59:39" (1/1) ... [2022-11-03 03:59:39,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:59:39,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:59:39,806 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:59:39,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:59:39,857 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 03:59:39,858 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-03 03:59:39,858 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-03 03:59:39,858 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-11-03 03:59:39,858 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-11-03 03:59:39,859 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-11-03 03:59:39,859 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-11-03 03:59:39,859 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-11-03 03:59:39,859 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-11-03 03:59:39,859 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-11-03 03:59:39,859 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-11-03 03:59:39,860 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-11-03 03:59:39,860 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-11-03 03:59:39,860 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-11-03 03:59:39,860 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-11-03 03:59:39,860 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-11-03 03:59:39,860 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-11-03 03:59:39,861 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-11-03 03:59:39,861 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-11-03 03:59:39,861 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-11-03 03:59:39,861 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-11-03 03:59:39,861 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-11-03 03:59:39,861 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-11-03 03:59:39,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 03:59:39,862 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-11-03 03:59:39,862 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-11-03 03:59:39,862 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-11-03 03:59:39,862 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-11-03 03:59:39,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:59:39,863 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:59:39,863 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-11-03 03:59:39,863 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-11-03 03:59:39,964 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:59:39,970 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:59:40,763 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:59:41,030 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:59:41,030 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2022-11-03 03:59:41,033 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:59:41 BoogieIcfgContainer [2022-11-03 03:59:41,034 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:59:41,035 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:59:41,036 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:59:41,039 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:59:41,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:59:39" (1/3) ... [2022-11-03 03:59:41,040 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@da93fa8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:59:41, skipping insertion in model container [2022-11-03 03:59:41,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:59:39" (2/3) ... [2022-11-03 03:59:41,041 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@da93fa8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:59:41, skipping insertion in model container [2022-11-03 03:59:41,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:59:41" (3/3) ... [2022-11-03 03:59:41,044 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.03.cil-2.c [2022-11-03 03:59:41,065 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:59:41,066 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-03 03:59:41,141 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:59:41,147 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;@203e1e50, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:59:41,148 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-03 03:59:41,152 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) [2022-11-03 03:59:41,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 03:59:41,165 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:59:41,165 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] [2022-11-03 03:59:41,166 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:59:41,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:59:41,172 INFO L85 PathProgramCache]: Analyzing trace with hash -911236769, now seen corresponding path program 1 times [2022-11-03 03:59:41,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:59:41,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123332605] [2022-11-03 03:59:41,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:41,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:59:41,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:41,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:59:41,647 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:59:41,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123332605] [2022-11-03 03:59:41,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123332605] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:59:41,648 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:59:41,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:59:41,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141898104] [2022-11-03 03:59:41,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:59:41,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:59:41,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:59:41,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:59:41,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:59:41,692 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) [2022-11-03 03:59:42,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:59:42,585 INFO L93 Difference]: Finished difference Result 623 states and 938 transitions. [2022-11-03 03:59:42,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:59:42,588 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 [2022-11-03 03:59:42,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:59:42,617 INFO L225 Difference]: With dead ends: 623 [2022-11-03 03:59:42,617 INFO L226 Difference]: Without dead ends: 457 [2022-11-03 03:59:42,627 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 [2022-11-03 03:59:42,634 INFO L413 NwaCegarLoop]: 301 mSDtfsCounter, 631 mSDsluCounter, 442 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, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:59:42,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [639 Valid, 648 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 03:59:42,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-11-03 03:59:42,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 446. [2022-11-03 03:59:42,723 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) [2022-11-03 03:59:42,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 645 transitions. [2022-11-03 03:59:42,728 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 645 transitions. Word has length 40 [2022-11-03 03:59:42,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:59:42,729 INFO L495 AbstractCegarLoop]: Abstraction has 446 states and 645 transitions. [2022-11-03 03:59:42,729 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) [2022-11-03 03:59:42,729 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 645 transitions. [2022-11-03 03:59:42,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-03 03:59:42,732 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:59:42,732 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] [2022-11-03 03:59:42,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 03:59:42,733 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:59:42,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:59:42,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1284385766, now seen corresponding path program 1 times [2022-11-03 03:59:42,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:59:42,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163260205] [2022-11-03 03:59:42,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:42,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:59:42,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:42,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:59:42,819 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:59:42,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163260205] [2022-11-03 03:59:42,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163260205] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:59:42,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:59:42,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:59:42,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453545588] [2022-11-03 03:59:42,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:59:42,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:59:42,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:59:42,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:59:42,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:59:42,823 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) [2022-11-03 03:59:43,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:59:43,098 INFO L93 Difference]: Finished difference Result 570 states and 807 transitions. [2022-11-03 03:59:43,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:59:43,098 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 [2022-11-03 03:59:43,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:59:43,105 INFO L225 Difference]: With dead ends: 570 [2022-11-03 03:59:43,106 INFO L226 Difference]: Without dead ends: 506 [2022-11-03 03:59:43,108 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 [2022-11-03 03:59:43,110 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 271 mSDsluCounter, 198 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 [2022-11-03 03:59:43,111 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] [2022-11-03 03:59:43,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2022-11-03 03:59:43,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 499. [2022-11-03 03:59:43,190 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) [2022-11-03 03:59:43,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 708 transitions. [2022-11-03 03:59:43,194 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 708 transitions. Word has length 45 [2022-11-03 03:59:43,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:59:43,195 INFO L495 AbstractCegarLoop]: Abstraction has 499 states and 708 transitions. [2022-11-03 03:59:43,195 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) [2022-11-03 03:59:43,195 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 708 transitions. [2022-11-03 03:59:43,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-03 03:59:43,198 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:59:43,198 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] [2022-11-03 03:59:43,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 03:59:43,199 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:59:43,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:59:43,199 INFO L85 PathProgramCache]: Analyzing trace with hash -365411143, now seen corresponding path program 1 times [2022-11-03 03:59:43,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:59:43,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495893582] [2022-11-03 03:59:43,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:43,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:59:43,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:43,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:59:43,509 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:59:43,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495893582] [2022-11-03 03:59:43,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495893582] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:59:43,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:59:43,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 03:59:43,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8897371] [2022-11-03 03:59:43,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:59:43,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:59:43,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:59:43,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:59:43,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:59:43,515 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) [2022-11-03 03:59:44,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:59:44,156 INFO L93 Difference]: Finished difference Result 680 states and 929 transitions. [2022-11-03 03:59:44,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 03:59:44,157 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 [2022-11-03 03:59:44,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:59:44,161 INFO L225 Difference]: With dead ends: 680 [2022-11-03 03:59:44,161 INFO L226 Difference]: Without dead ends: 564 [2022-11-03 03:59:44,162 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 [2022-11-03 03:59:44,163 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 331 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:59:44,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [353 Valid, 684 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 03:59:44,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2022-11-03 03:59:44,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 551. [2022-11-03 03:59:44,247 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) [2022-11-03 03:59:44,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 771 transitions. [2022-11-03 03:59:44,251 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 771 transitions. Word has length 45 [2022-11-03 03:59:44,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:59:44,252 INFO L495 AbstractCegarLoop]: Abstraction has 551 states and 771 transitions. [2022-11-03 03:59:44,252 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) [2022-11-03 03:59:44,252 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 771 transitions. [2022-11-03 03:59:44,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-03 03:59:44,254 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:59:44,254 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] [2022-11-03 03:59:44,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 03:59:44,255 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:59:44,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:59:44,255 INFO L85 PathProgramCache]: Analyzing trace with hash -471338478, now seen corresponding path program 1 times [2022-11-03 03:59:44,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:59:44,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654352027] [2022-11-03 03:59:44,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:44,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:59:44,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:44,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:59:44,306 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:59:44,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654352027] [2022-11-03 03:59:44,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654352027] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:59:44,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:59:44,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:59:44,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931916626] [2022-11-03 03:59:44,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:59:44,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:59:44,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:59:44,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:59:44,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:59:44,309 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) [2022-11-03 03:59:44,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:59:44,451 INFO L93 Difference]: Finished difference Result 879 states and 1177 transitions. [2022-11-03 03:59:44,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:59:44,451 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 [2022-11-03 03:59:44,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:59:44,455 INFO L225 Difference]: With dead ends: 879 [2022-11-03 03:59:44,455 INFO L226 Difference]: Without dead ends: 710 [2022-11-03 03:59:44,456 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 [2022-11-03 03:59:44,458 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 190 mSDsluCounter, 72 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 [2022-11-03 03:59:44,458 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] [2022-11-03 03:59:44,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2022-11-03 03:59:44,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 691. [2022-11-03 03:59:44,549 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) [2022-11-03 03:59:44,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 929 transitions. [2022-11-03 03:59:44,553 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 929 transitions. Word has length 46 [2022-11-03 03:59:44,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:59:44,554 INFO L495 AbstractCegarLoop]: Abstraction has 691 states and 929 transitions. [2022-11-03 03:59:44,554 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) [2022-11-03 03:59:44,555 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 929 transitions. [2022-11-03 03:59:44,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-03 03:59:44,556 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:59:44,557 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] [2022-11-03 03:59:44,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 03:59:44,557 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:59:44,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:59:44,558 INFO L85 PathProgramCache]: Analyzing trace with hash 449491853, now seen corresponding path program 1 times [2022-11-03 03:59:44,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:59:44,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780579162] [2022-11-03 03:59:44,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:44,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:59:44,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:44,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:59:44,627 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:59:44,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780579162] [2022-11-03 03:59:44,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780579162] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:59:44,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:59:44,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:59:44,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011402587] [2022-11-03 03:59:44,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:59:44,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:59:44,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:59:44,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:59:44,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:59:44,639 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) [2022-11-03 03:59:44,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:59:44,811 INFO L93 Difference]: Finished difference Result 1061 states and 1374 transitions. [2022-11-03 03:59:44,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:59:44,812 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 [2022-11-03 03:59:44,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:59:44,817 INFO L225 Difference]: With dead ends: 1061 [2022-11-03 03:59:44,817 INFO L226 Difference]: Without dead ends: 798 [2022-11-03 03:59:44,818 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 [2022-11-03 03:59:44,823 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 67 mSDsluCounter, 186 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 [2022-11-03 03:59:44,823 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] [2022-11-03 03:59:44,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2022-11-03 03:59:44,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 792. [2022-11-03 03:59:44,913 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) [2022-11-03 03:59:44,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 1049 transitions. [2022-11-03 03:59:44,931 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 1049 transitions. Word has length 47 [2022-11-03 03:59:44,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:59:44,932 INFO L495 AbstractCegarLoop]: Abstraction has 792 states and 1049 transitions. [2022-11-03 03:59:44,932 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) [2022-11-03 03:59:44,932 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 1049 transitions. [2022-11-03 03:59:44,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-03 03:59:44,936 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:59:44,936 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] [2022-11-03 03:59:44,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 03:59:44,937 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:59:44,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:59:44,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1236058268, now seen corresponding path program 1 times [2022-11-03 03:59:44,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:59:44,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768987465] [2022-11-03 03:59:44,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:44,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:59:44,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:45,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:59:45,099 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:59:45,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768987465] [2022-11-03 03:59:45,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768987465] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:59:45,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:59:45,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:59:45,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700626837] [2022-11-03 03:59:45,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:59:45,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:59:45,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:59:45,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:59:45,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:59:45,101 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) [2022-11-03 03:59:45,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:59:45,395 INFO L93 Difference]: Finished difference Result 899 states and 1175 transitions. [2022-11-03 03:59:45,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:59:45,395 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 [2022-11-03 03:59:45,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:59:45,400 INFO L225 Difference]: With dead ends: 899 [2022-11-03 03:59:45,400 INFO L226 Difference]: Without dead ends: 896 [2022-11-03 03:59:45,401 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 [2022-11-03 03:59:45,402 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 344 mSDsluCounter, 52 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 [2022-11-03 03:59:45,402 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] [2022-11-03 03:59:45,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2022-11-03 03:59:45,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 791. [2022-11-03 03:59:45,529 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) [2022-11-03 03:59:45,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 1045 transitions. [2022-11-03 03:59:45,534 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 1045 transitions. Word has length 54 [2022-11-03 03:59:45,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:59:45,535 INFO L495 AbstractCegarLoop]: Abstraction has 791 states and 1045 transitions. [2022-11-03 03:59:45,535 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) [2022-11-03 03:59:45,535 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 1045 transitions. [2022-11-03 03:59:45,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-03 03:59:45,537 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:59:45,537 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] [2022-11-03 03:59:45,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 03:59:45,537 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:59:45,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:59:45,538 INFO L85 PathProgramCache]: Analyzing trace with hash 336125942, now seen corresponding path program 1 times [2022-11-03 03:59:45,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:59:45,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887191174] [2022-11-03 03:59:45,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:45,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:59:45,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:45,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:59:45,676 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:59:45,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887191174] [2022-11-03 03:59:45,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887191174] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:59:45,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813784955] [2022-11-03 03:59:45,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:59:45,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:59:45,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:59:45,683 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:59:45,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 03:59:45,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:45,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:59:45,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:59:46,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:59:46,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:59:46,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:59:46,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813784955] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:59:46,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [605631606] [2022-11-03 03:59:46,402 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2022-11-03 03:59:46,402 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:59:46,406 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:59:46,411 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:59:46,411 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:59:49,219 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 115 for LOIs [2022-11-03 03:59:49,244 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 83 for LOIs [2022-11-03 03:59:49,253 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 111 for LOIs [2022-11-03 03:59:49,273 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 119 for LOIs [2022-11-03 03:59:49,699 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 115 for LOIs [2022-11-03 03:59:49,748 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 115 for LOIs [2022-11-03 03:59:49,797 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 115 for LOIs [2022-11-03 03:59:49,818 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 122 for LOIs [2022-11-03 03:59:49,841 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 04:00:01,480 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 [2022-11-03 04:00:01,481 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 04:00:01,481 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 04:00:01,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-11-03 04:00:01,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331713668] [2022-11-03 04:00:01,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 04:00:01,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:00:01,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:00:01,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:00:01,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1867, Unknown=0, NotChecked=0, Total=2070 [2022-11-03 04:00:01,483 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) [2022-11-03 04:00:02,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:02,097 INFO L93 Difference]: Finished difference Result 1568 states and 1973 transitions. [2022-11-03 04:00:02,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:00:02,098 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 [2022-11-03 04:00:02,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:02,107 INFO L225 Difference]: With dead ends: 1568 [2022-11-03 04:00:02,107 INFO L226 Difference]: Without dead ends: 1565 [2022-11-03 04:00:02,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=203, Invalid=1867, Unknown=0, NotChecked=0, Total=2070 [2022-11-03 04:00:02,109 INFO L413 NwaCegarLoop]: 299 mSDtfsCounter, 455 mSDsluCounter, 638 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 [2022-11-03 04:00:02,110 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] [2022-11-03 04:00:02,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1565 states. [2022-11-03 04:00:02,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1565 to 1191. [2022-11-03 04:00:02,233 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) [2022-11-03 04:00:02,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1191 states to 1191 states and 1521 transitions. [2022-11-03 04:00:02,240 INFO L78 Accepts]: Start accepts. Automaton has 1191 states and 1521 transitions. Word has length 55 [2022-11-03 04:00:02,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:02,240 INFO L495 AbstractCegarLoop]: Abstraction has 1191 states and 1521 transitions. [2022-11-03 04:00:02,241 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) [2022-11-03 04:00:02,241 INFO L276 IsEmpty]: Start isEmpty. Operand 1191 states and 1521 transitions. [2022-11-03 04:00:02,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-03 04:00:02,243 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:02,244 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] [2022-11-03 04:00:02,283 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-03 04:00:02,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:00:02,460 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:00:02,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:02,461 INFO L85 PathProgramCache]: Analyzing trace with hash 992874084, now seen corresponding path program 2 times [2022-11-03 04:00:02,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:00:02,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040188785] [2022-11-03 04:00:02,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:02,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:00:02,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:02,509 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:02,509 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:00:02,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040188785] [2022-11-03 04:00:02,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040188785] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:02,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:00:02,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 04:00:02,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252883199] [2022-11-03 04:00:02,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:02,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:00:02,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:00:02,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:00:02,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 04:00:02,512 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) [2022-11-03 04:00:02,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:02,684 INFO L93 Difference]: Finished difference Result 1608 states and 2018 transitions. [2022-11-03 04:00:02,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:00:02,685 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 [2022-11-03 04:00:02,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:02,690 INFO L225 Difference]: With dead ends: 1608 [2022-11-03 04:00:02,690 INFO L226 Difference]: Without dead ends: 995 [2022-11-03 04:00:02,692 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 [2022-11-03 04:00:02,693 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 188 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2022-11-03 04:00:02,694 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] [2022-11-03 04:00:02,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2022-11-03 04:00:02,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 993. [2022-11-03 04:00:02,815 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) [2022-11-03 04:00:02,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 993 states to 993 states and 1275 transitions. [2022-11-03 04:00:02,820 INFO L78 Accepts]: Start accepts. Automaton has 993 states and 1275 transitions. Word has length 58 [2022-11-03 04:00:02,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:02,823 INFO L495 AbstractCegarLoop]: Abstraction has 993 states and 1275 transitions. [2022-11-03 04:00:02,823 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) [2022-11-03 04:00:02,823 INFO L276 IsEmpty]: Start isEmpty. Operand 993 states and 1275 transitions. [2022-11-03 04:00:02,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-03 04:00:02,824 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:02,825 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] [2022-11-03 04:00:02,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 04:00:02,825 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:00:02,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:02,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1510064802, now seen corresponding path program 1 times [2022-11-03 04:00:02,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:00:02,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835891766] [2022-11-03 04:00:02,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:02,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:00:02,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:02,890 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 04:00:02,890 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:00:02,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835891766] [2022-11-03 04:00:02,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835891766] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:02,891 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:00:02,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 04:00:02,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699765370] [2022-11-03 04:00:02,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:02,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:00:02,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:00:02,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:00:02,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 04:00:02,894 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) [2022-11-03 04:00:03,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:03,107 INFO L93 Difference]: Finished difference Result 1624 states and 2025 transitions. [2022-11-03 04:00:03,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:00:03,108 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 [2022-11-03 04:00:03,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:03,124 INFO L225 Difference]: With dead ends: 1624 [2022-11-03 04:00:03,124 INFO L226 Difference]: Without dead ends: 1249 [2022-11-03 04:00:03,128 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 [2022-11-03 04:00:03,132 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 43 mSDsluCounter, 204 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 [2022-11-03 04:00:03,133 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] [2022-11-03 04:00:03,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1249 states. [2022-11-03 04:00:03,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1249 to 1068. [2022-11-03 04:00:03,245 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) [2022-11-03 04:00:03,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1364 transitions. [2022-11-03 04:00:03,263 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1364 transitions. Word has length 61 [2022-11-03 04:00:03,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:03,263 INFO L495 AbstractCegarLoop]: Abstraction has 1068 states and 1364 transitions. [2022-11-03 04:00:03,264 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) [2022-11-03 04:00:03,264 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1364 transitions. [2022-11-03 04:00:03,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-03 04:00:03,266 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:03,266 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] [2022-11-03 04:00:03,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 04:00:03,267 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:00:03,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:03,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1013883676, now seen corresponding path program 1 times [2022-11-03 04:00:03,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:00:03,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293337449] [2022-11-03 04:00:03,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:03,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:00:03,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:03,472 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 04:00:03,472 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:00:03,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293337449] [2022-11-03 04:00:03,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293337449] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:03,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:00:03,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 04:00:03,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217627234] [2022-11-03 04:00:03,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:03,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 04:00:03,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:00:03,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 04:00:03,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:00:03,475 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) [2022-11-03 04:00:04,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:04,144 INFO L93 Difference]: Finished difference Result 2121 states and 2579 transitions. [2022-11-03 04:00:04,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 04:00:04,144 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 [2022-11-03 04:00:04,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:04,151 INFO L225 Difference]: With dead ends: 2121 [2022-11-03 04:00:04,151 INFO L226 Difference]: Without dead ends: 1436 [2022-11-03 04:00:04,154 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 [2022-11-03 04:00:04,155 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 311 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:04,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [333 Valid, 585 Invalid, 636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 04:00:04,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1436 states. [2022-11-03 04:00:04,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1436 to 1387. [2022-11-03 04:00:04,338 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) [2022-11-03 04:00:04,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1387 states to 1387 states and 1719 transitions. [2022-11-03 04:00:04,345 INFO L78 Accepts]: Start accepts. Automaton has 1387 states and 1719 transitions. Word has length 70 [2022-11-03 04:00:04,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:04,345 INFO L495 AbstractCegarLoop]: Abstraction has 1387 states and 1719 transitions. [2022-11-03 04:00:04,345 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) [2022-11-03 04:00:04,345 INFO L276 IsEmpty]: Start isEmpty. Operand 1387 states and 1719 transitions. [2022-11-03 04:00:04,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 04:00:04,347 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:04,348 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] [2022-11-03 04:00:04,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-03 04:00:04,348 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:00:04,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:04,349 INFO L85 PathProgramCache]: Analyzing trace with hash -955459290, now seen corresponding path program 1 times [2022-11-03 04:00:04,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:00:04,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95216746] [2022-11-03 04:00:04,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:04,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:00:04,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:04,394 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 04:00:04,395 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:00:04,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95216746] [2022-11-03 04:00:04,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95216746] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:04,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:00:04,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 04:00:04,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483658748] [2022-11-03 04:00:04,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:04,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:00:04,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:00:04,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:00:04,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 04:00:04,397 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) [2022-11-03 04:00:04,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:04,660 INFO L93 Difference]: Finished difference Result 2359 states and 2847 transitions. [2022-11-03 04:00:04,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:00:04,660 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 [2022-11-03 04:00:04,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:04,668 INFO L225 Difference]: With dead ends: 2359 [2022-11-03 04:00:04,668 INFO L226 Difference]: Without dead ends: 1563 [2022-11-03 04:00:04,670 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 [2022-11-03 04:00:04,671 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 38 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-11-03 04:00:04,671 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] [2022-11-03 04:00:04,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1563 states. [2022-11-03 04:00:04,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1563 to 1434. [2022-11-03 04:00:04,845 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) [2022-11-03 04:00:04,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1434 states to 1434 states and 1777 transitions. [2022-11-03 04:00:04,853 INFO L78 Accepts]: Start accepts. Automaton has 1434 states and 1777 transitions. Word has length 71 [2022-11-03 04:00:04,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:04,853 INFO L495 AbstractCegarLoop]: Abstraction has 1434 states and 1777 transitions. [2022-11-03 04:00:04,853 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) [2022-11-03 04:00:04,854 INFO L276 IsEmpty]: Start isEmpty. Operand 1434 states and 1777 transitions. [2022-11-03 04:00:04,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-03 04:00:04,861 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:04,861 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] [2022-11-03 04:00:04,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-03 04:00:04,862 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:00:04,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:04,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1468371616, now seen corresponding path program 1 times [2022-11-03 04:00:04,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:00:04,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541264187] [2022-11-03 04:00:04,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:04,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:00:04,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:04,959 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 04:00:04,960 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:00:04,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541264187] [2022-11-03 04:00:04,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541264187] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:00:04,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085953939] [2022-11-03 04:00:04,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:04,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:00:04,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:00:04,963 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:00:04,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 04:00:05,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:05,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 04:00:05,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:00:05,158 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 04:00:05,174 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:00:05,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085953939] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:05,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:00:05,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 04:00:05,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188586719] [2022-11-03 04:00:05,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:05,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:00:05,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:00:05,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:00:05,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:00:05,177 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) [2022-11-03 04:00:05,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:05,530 INFO L93 Difference]: Finished difference Result 2162 states and 2888 transitions. [2022-11-03 04:00:05,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:00:05,531 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 [2022-11-03 04:00:05,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:05,540 INFO L225 Difference]: With dead ends: 2162 [2022-11-03 04:00:05,540 INFO L226 Difference]: Without dead ends: 1790 [2022-11-03 04:00:05,542 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 [2022-11-03 04:00:05,543 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 184 mSDsluCounter, 107 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 [2022-11-03 04:00:05,543 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] [2022-11-03 04:00:05,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1790 states. [2022-11-03 04:00:05,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1790 to 1783. [2022-11-03 04:00:05,822 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) [2022-11-03 04:00:05,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1783 states to 1783 states and 2276 transitions. [2022-11-03 04:00:05,831 INFO L78 Accepts]: Start accepts. Automaton has 1783 states and 2276 transitions. Word has length 73 [2022-11-03 04:00:05,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:05,831 INFO L495 AbstractCegarLoop]: Abstraction has 1783 states and 2276 transitions. [2022-11-03 04:00:05,832 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) [2022-11-03 04:00:05,832 INFO L276 IsEmpty]: Start isEmpty. Operand 1783 states and 2276 transitions. [2022-11-03 04:00:05,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-03 04:00:05,834 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:05,834 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] [2022-11-03 04:00:05,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 04:00:06,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-03 04:00:06,051 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:00:06,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:06,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1974574050, now seen corresponding path program 1 times [2022-11-03 04:00:06,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:00:06,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775261183] [2022-11-03 04:00:06,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:06,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:00:06,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:06,407 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 04:00:06,408 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:00:06,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775261183] [2022-11-03 04:00:06,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775261183] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:06,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:00:06,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 04:00:06,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101583447] [2022-11-03 04:00:06,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:06,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:00:06,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:00:06,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:00:06,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:00:06,410 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) [2022-11-03 04:00:07,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:07,080 INFO L93 Difference]: Finished difference Result 2997 states and 4087 transitions. [2022-11-03 04:00:07,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 04:00:07,080 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 [2022-11-03 04:00:07,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:07,092 INFO L225 Difference]: With dead ends: 2997 [2022-11-03 04:00:07,093 INFO L226 Difference]: Without dead ends: 2277 [2022-11-03 04:00:07,096 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 [2022-11-03 04:00:07,097 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 397 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:07,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [414 Valid, 463 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 04:00:07,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2277 states. [2022-11-03 04:00:07,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2277 to 2191. [2022-11-03 04:00:07,386 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) [2022-11-03 04:00:07,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2191 states to 2191 states and 2857 transitions. [2022-11-03 04:00:07,396 INFO L78 Accepts]: Start accepts. Automaton has 2191 states and 2857 transitions. Word has length 73 [2022-11-03 04:00:07,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:07,397 INFO L495 AbstractCegarLoop]: Abstraction has 2191 states and 2857 transitions. [2022-11-03 04:00:07,397 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) [2022-11-03 04:00:07,397 INFO L276 IsEmpty]: Start isEmpty. Operand 2191 states and 2857 transitions. [2022-11-03 04:00:07,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-03 04:00:07,400 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:07,400 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] [2022-11-03 04:00:07,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-03 04:00:07,401 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:00:07,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:07,401 INFO L85 PathProgramCache]: Analyzing trace with hash -542680176, now seen corresponding path program 1 times [2022-11-03 04:00:07,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:00:07,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106836008] [2022-11-03 04:00:07,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:07,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:00:07,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:07,484 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 04:00:07,485 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:00:07,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106836008] [2022-11-03 04:00:07,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106836008] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:07,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:00:07,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 04:00:07,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512478050] [2022-11-03 04:00:07,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:07,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:00:07,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:00:07,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:00:07,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 04:00:07,490 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) [2022-11-03 04:00:07,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:07,907 INFO L93 Difference]: Finished difference Result 3421 states and 4686 transitions. [2022-11-03 04:00:07,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:00:07,908 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 [2022-11-03 04:00:07,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:07,925 INFO L225 Difference]: With dead ends: 3421 [2022-11-03 04:00:07,925 INFO L226 Difference]: Without dead ends: 2435 [2022-11-03 04:00:07,930 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 [2022-11-03 04:00:07,930 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 46 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-11-03 04:00:07,931 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] [2022-11-03 04:00:07,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2435 states. [2022-11-03 04:00:08,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2435 to 2310. [2022-11-03 04:00:08,249 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) [2022-11-03 04:00:08,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2310 states to 2310 states and 3041 transitions. [2022-11-03 04:00:08,258 INFO L78 Accepts]: Start accepts. Automaton has 2310 states and 3041 transitions. Word has length 74 [2022-11-03 04:00:08,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:08,258 INFO L495 AbstractCegarLoop]: Abstraction has 2310 states and 3041 transitions. [2022-11-03 04:00:08,258 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) [2022-11-03 04:00:08,259 INFO L276 IsEmpty]: Start isEmpty. Operand 2310 states and 3041 transitions. [2022-11-03 04:00:08,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-03 04:00:08,263 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:08,264 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] [2022-11-03 04:00:08,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-03 04:00:08,264 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:00:08,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:08,265 INFO L85 PathProgramCache]: Analyzing trace with hash -475164843, now seen corresponding path program 1 times [2022-11-03 04:00:08,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:00:08,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101105959] [2022-11-03 04:00:08,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:08,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:00:08,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:08,727 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 04:00:08,727 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:00:08,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101105959] [2022-11-03 04:00:08,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101105959] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:00:08,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47407421] [2022-11-03 04:00:08,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:08,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:00:08,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:00:08,743 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:00:08,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 04:00:08,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:08,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 04:00:08,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:00:08,960 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 04:00:08,960 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:00:08,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47407421] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:08,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:00:08,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [14] total 15 [2022-11-03 04:00:08,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860381272] [2022-11-03 04:00:08,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:08,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:00:08,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:00:08,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:00:08,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-11-03 04:00:08,963 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) [2022-11-03 04:00:09,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:09,297 INFO L93 Difference]: Finished difference Result 3135 states and 4029 transitions. [2022-11-03 04:00:09,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:00:09,298 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 [2022-11-03 04:00:09,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:09,310 INFO L225 Difference]: With dead ends: 3135 [2022-11-03 04:00:09,310 INFO L226 Difference]: Without dead ends: 2339 [2022-11-03 04:00:09,315 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 [2022-11-03 04:00:09,316 INFO L413 NwaCegarLoop]: 221 mSDtfsCounter, 46 mSDsluCounter, 199 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 [2022-11-03 04:00:09,317 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] [2022-11-03 04:00:09,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2339 states. [2022-11-03 04:00:09,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2339 to 2306. [2022-11-03 04:00:09,630 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) [2022-11-03 04:00:09,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2306 states to 2306 states and 3005 transitions. [2022-11-03 04:00:09,639 INFO L78 Accepts]: Start accepts. Automaton has 2306 states and 3005 transitions. Word has length 102 [2022-11-03 04:00:09,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:09,640 INFO L495 AbstractCegarLoop]: Abstraction has 2306 states and 3005 transitions. [2022-11-03 04:00:09,640 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) [2022-11-03 04:00:09,640 INFO L276 IsEmpty]: Start isEmpty. Operand 2306 states and 3005 transitions. [2022-11-03 04:00:09,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-03 04:00:09,646 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:09,646 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] [2022-11-03 04:00:09,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 04:00:09,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-03 04:00:09,871 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:00:09,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:09,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1101392916, now seen corresponding path program 1 times [2022-11-03 04:00:09,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:00:09,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437102573] [2022-11-03 04:00:09,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:09,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:00:09,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:10,329 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 04:00:10,330 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:00:10,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437102573] [2022-11-03 04:00:10,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437102573] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:00:10,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528074222] [2022-11-03 04:00:10,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:10,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:00:10,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:00:10,347 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:00:10,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 04:00:10,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:10,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 04:00:10,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:00:10,563 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 04:00:10,563 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:00:10,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528074222] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:10,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:00:10,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 17 [2022-11-03 04:00:10,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15487179] [2022-11-03 04:00:10,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:10,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:00:10,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:00:10,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:00:10,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-03 04:00:10,566 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) [2022-11-03 04:00:11,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:11,086 INFO L93 Difference]: Finished difference Result 3170 states and 4010 transitions. [2022-11-03 04:00:11,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 04:00:11,101 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 [2022-11-03 04:00:11,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:11,111 INFO L225 Difference]: With dead ends: 3170 [2022-11-03 04:00:11,111 INFO L226 Difference]: Without dead ends: 2123 [2022-11-03 04:00:11,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-11-03 04:00:11,124 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 181 mSDsluCounter, 704 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 823 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:11,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 823 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:00:11,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2123 states. [2022-11-03 04:00:11,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2123 to 1938. [2022-11-03 04:00:11,411 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) [2022-11-03 04:00:11,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1938 states to 1938 states and 2593 transitions. [2022-11-03 04:00:11,418 INFO L78 Accepts]: Start accepts. Automaton has 1938 states and 2593 transitions. Word has length 102 [2022-11-03 04:00:11,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:11,418 INFO L495 AbstractCegarLoop]: Abstraction has 1938 states and 2593 transitions. [2022-11-03 04:00:11,419 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) [2022-11-03 04:00:11,419 INFO L276 IsEmpty]: Start isEmpty. Operand 1938 states and 2593 transitions. [2022-11-03 04:00:11,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-03 04:00:11,423 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:11,424 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] [2022-11-03 04:00:11,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 04:00:11,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-03 04:00:11,647 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:00:11,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:11,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1860212688, now seen corresponding path program 1 times [2022-11-03 04:00:11,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:00:11,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860527223] [2022-11-03 04:00:11,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:11,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:00:11,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:11,708 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-03 04:00:11,708 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:00:11,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860527223] [2022-11-03 04:00:11,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860527223] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:11,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:00:11,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 04:00:11,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557433680] [2022-11-03 04:00:11,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:11,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:00:11,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:00:11,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:00:11,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 04:00:11,711 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) [2022-11-03 04:00:12,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:12,136 INFO L93 Difference]: Finished difference Result 4363 states and 6217 transitions. [2022-11-03 04:00:12,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:00:12,137 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 [2022-11-03 04:00:12,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:12,151 INFO L225 Difference]: With dead ends: 4363 [2022-11-03 04:00:12,151 INFO L226 Difference]: Without dead ends: 3115 [2022-11-03 04:00:12,156 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 [2022-11-03 04:00:12,157 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 178 mSDsluCounter, 107 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 [2022-11-03 04:00:12,157 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] [2022-11-03 04:00:12,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3115 states. [2022-11-03 04:00:12,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3115 to 3091. [2022-11-03 04:00:12,509 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) [2022-11-03 04:00:12,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3091 states to 3091 states and 4202 transitions. [2022-11-03 04:00:12,521 INFO L78 Accepts]: Start accepts. Automaton has 3091 states and 4202 transitions. Word has length 97 [2022-11-03 04:00:12,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:12,521 INFO L495 AbstractCegarLoop]: Abstraction has 3091 states and 4202 transitions. [2022-11-03 04:00:12,522 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) [2022-11-03 04:00:12,522 INFO L276 IsEmpty]: Start isEmpty. Operand 3091 states and 4202 transitions. [2022-11-03 04:00:12,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-03 04:00:12,531 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:12,531 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] [2022-11-03 04:00:12,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-03 04:00:12,531 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:00:12,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:12,532 INFO L85 PathProgramCache]: Analyzing trace with hash 192220974, now seen corresponding path program 1 times [2022-11-03 04:00:12,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:00:12,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640090735] [2022-11-03 04:00:12,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:12,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:00:12,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:12,732 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-03 04:00:12,732 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:00:12,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640090735] [2022-11-03 04:00:12,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640090735] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:00:12,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871615839] [2022-11-03 04:00:12,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:12,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:00:12,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:00:12,735 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:00:12,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 04:00:12,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:12,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 04:00:12,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:00:12,955 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 04:00:12,955 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:00:12,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871615839] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:12,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:00:12,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-11-03 04:00:12,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157696296] [2022-11-03 04:00:12,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:12,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:00:12,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:00:12,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:00:12,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-03 04:00:12,958 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) [2022-11-03 04:00:13,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:13,549 INFO L93 Difference]: Finished difference Result 3640 states and 4827 transitions. [2022-11-03 04:00:13,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:00:13,550 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 [2022-11-03 04:00:13,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:13,566 INFO L225 Difference]: With dead ends: 3640 [2022-11-03 04:00:13,566 INFO L226 Difference]: Without dead ends: 3047 [2022-11-03 04:00:13,568 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 [2022-11-03 04:00:13,569 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 66 mSDsluCounter, 931 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 1012 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:13,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 1012 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:00:13,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3047 states. [2022-11-03 04:00:14,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3047 to 2955. [2022-11-03 04:00:14,045 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) [2022-11-03 04:00:14,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2955 states to 2955 states and 4047 transitions. [2022-11-03 04:00:14,056 INFO L78 Accepts]: Start accepts. Automaton has 2955 states and 4047 transitions. Word has length 112 [2022-11-03 04:00:14,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:14,058 INFO L495 AbstractCegarLoop]: Abstraction has 2955 states and 4047 transitions. [2022-11-03 04:00:14,059 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) [2022-11-03 04:00:14,059 INFO L276 IsEmpty]: Start isEmpty. Operand 2955 states and 4047 transitions. [2022-11-03 04:00:14,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-03 04:00:14,067 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:14,068 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] [2022-11-03 04:00:14,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 04:00:14,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-03 04:00:14,283 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:00:14,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:14,283 INFO L85 PathProgramCache]: Analyzing trace with hash 188521773, now seen corresponding path program 1 times [2022-11-03 04:00:14,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:00:14,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462560089] [2022-11-03 04:00:14,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:14,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:00:14,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:14,453 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-03 04:00:14,453 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:00:14,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462560089] [2022-11-03 04:00:14,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462560089] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:00:14,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626213353] [2022-11-03 04:00:14,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:14,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:00:14,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:00:14,456 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:00:14,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 04:00:14,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:14,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 04:00:14,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:00:14,684 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 04:00:14,684 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:00:14,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626213353] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:00:14,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:00:14,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2022-11-03 04:00:14,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084350233] [2022-11-03 04:00:14,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:00:14,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:00:14,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:00:14,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:00:14,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-03 04:00:14,688 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) [2022-11-03 04:00:15,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:15,254 INFO L93 Difference]: Finished difference Result 3704 states and 4892 transitions. [2022-11-03 04:00:15,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:00:15,255 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 [2022-11-03 04:00:15,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:15,289 INFO L225 Difference]: With dead ends: 3704 [2022-11-03 04:00:15,290 INFO L226 Difference]: Without dead ends: 3247 [2022-11-03 04:00:15,293 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 [2022-11-03 04:00:15,293 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 167 mSDsluCounter, 808 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, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:15,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 894 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 04:00:15,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3247 states. [2022-11-03 04:00:15,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3247 to 3213. [2022-11-03 04:00:15,709 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) [2022-11-03 04:00:15,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3213 states to 3213 states and 4335 transitions. [2022-11-03 04:00:15,720 INFO L78 Accepts]: Start accepts. Automaton has 3213 states and 4335 transitions. Word has length 113 [2022-11-03 04:00:15,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:15,721 INFO L495 AbstractCegarLoop]: Abstraction has 3213 states and 4335 transitions. [2022-11-03 04:00:15,721 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) [2022-11-03 04:00:15,721 INFO L276 IsEmpty]: Start isEmpty. Operand 3213 states and 4335 transitions. [2022-11-03 04:00:15,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-03 04:00:15,730 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:15,731 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] [2022-11-03 04:00:15,767 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-03 04:00:15,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:00:15,946 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:00:15,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:15,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1181390692, now seen corresponding path program 1 times [2022-11-03 04:00:15,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:00:15,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560303933] [2022-11-03 04:00:15,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:15,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:00:15,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:16,894 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 04:00:16,894 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:00:16,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560303933] [2022-11-03 04:00:16,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560303933] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:00:16,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49323477] [2022-11-03 04:00:16,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:00:16,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:00:16,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:00:16,896 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:00:16,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 04:00:17,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:00:17,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-03 04:00:17,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:00:18,115 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 04:00:18,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:00:20,218 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 04:00:20,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49323477] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:00:20,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1511766348] [2022-11-03 04:00:20,222 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2022-11-03 04:00:20,222 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 04:00:20,223 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 04:00:20,223 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 04:00:20,223 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 04:00:42,247 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 192 for LOIs [2022-11-03 04:00:42,608 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 143 for LOIs [2022-11-03 04:00:42,645 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 134 for LOIs [2022-11-03 04:00:42,678 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 204 for LOIs [2022-11-03 04:00:43,847 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 122 for LOIs [2022-11-03 04:00:44,051 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 68 for LOIs [2022-11-03 04:00:44,176 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 196 for LOIs [2022-11-03 04:00:44,538 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 219 for LOIs [2022-11-03 04:00:45,014 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 04:01:17,515 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 [2022-11-03 04:01:17,515 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 04:01:17,515 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 04:01:17,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 16] total 51 [2022-11-03 04:01:17,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886031279] [2022-11-03 04:01:17,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 04:01:17,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-03 04:01:17,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:01:17,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-03 04:01:17,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=775, Invalid=10567, Unknown=0, NotChecked=0, Total=11342 [2022-11-03 04:01:17,522 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) [2022-11-03 04:01:40,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:40,246 INFO L93 Difference]: Finished difference Result 5724 states and 7251 transitions. [2022-11-03 04:01:40,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 229 states. [2022-11-03 04:01:40,247 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 [2022-11-03 04:01:40,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:40,265 INFO L225 Difference]: With dead ends: 5724 [2022-11-03 04:01:40,265 INFO L226 Difference]: Without dead ends: 5009 [2022-11-03 04:01:40,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 622 GetRequests, 287 SyntacticMatches, 6 SemanticMatches, 329 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44526 ImplicationChecksByTransitivity, 49.8s TimeCoverageRelationStatistics Valid=10062, Invalid=99168, Unknown=0, NotChecked=0, Total=109230 [2022-11-03 04:01:40,286 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 4254 mSDsluCounter, 2673 mSDsCounter, 0 mSdLazyCounter, 6761 mSolverCounterSat, 2646 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4255 SdHoareTripleChecker+Valid, 2541 SdHoareTripleChecker+Invalid, 9407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2646 IncrementalHoareTripleChecker+Valid, 6761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:40,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4255 Valid, 2541 Invalid, 9407 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2646 Valid, 6761 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-11-03 04:01:40,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5009 states. [2022-11-03 04:01:40,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5009 to 3489. [2022-11-03 04:01:40,823 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) [2022-11-03 04:01:40,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3489 states to 3489 states and 4648 transitions. [2022-11-03 04:01:40,834 INFO L78 Accepts]: Start accepts. Automaton has 3489 states and 4648 transitions. Word has length 114 [2022-11-03 04:01:40,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:40,834 INFO L495 AbstractCegarLoop]: Abstraction has 3489 states and 4648 transitions. [2022-11-03 04:01:40,835 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) [2022-11-03 04:01:40,835 INFO L276 IsEmpty]: Start isEmpty. Operand 3489 states and 4648 transitions. [2022-11-03 04:01:40,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-03 04:01:40,844 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:40,844 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] [2022-11-03 04:01:40,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 04:01:41,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:01:41,071 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:41,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:41,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1339438238, now seen corresponding path program 1 times [2022-11-03 04:01:41,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:01:41,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367769766] [2022-11-03 04:01:41,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:41,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:01:41,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:41,490 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 04:01:41,490 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:01:41,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367769766] [2022-11-03 04:01:41,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367769766] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:01:41,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669017818] [2022-11-03 04:01:41,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:41,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:01:41,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:01:41,494 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:01:41,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 04:01:41,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:41,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 04:01:41,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:41,733 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 04:01:41,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:01:42,001 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 04:01:42,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669017818] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 04:01:42,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:01:42,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14, 8] total 20 [2022-11-03 04:01:42,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979358084] [2022-11-03 04:01:42,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:01:42,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:01:42,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:01:42,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:01:42,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-11-03 04:01:42,004 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) [2022-11-03 04:01:43,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:43,163 INFO L93 Difference]: Finished difference Result 4813 states and 6196 transitions. [2022-11-03 04:01:43,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 04:01:43,163 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 [2022-11-03 04:01:43,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:43,178 INFO L225 Difference]: With dead ends: 4813 [2022-11-03 04:01:43,178 INFO L226 Difference]: Without dead ends: 3822 [2022-11-03 04:01:43,182 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 [2022-11-03 04:01:43,183 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 302 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:43,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 466 Invalid, 636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 04:01:43,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3822 states. [2022-11-03 04:01:43,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3822 to 3569. [2022-11-03 04:01:43,728 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) [2022-11-03 04:01:43,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3569 states to 3569 states and 4758 transitions. [2022-11-03 04:01:43,739 INFO L78 Accepts]: Start accepts. Automaton has 3569 states and 4758 transitions. Word has length 115 [2022-11-03 04:01:43,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:43,740 INFO L495 AbstractCegarLoop]: Abstraction has 3569 states and 4758 transitions. [2022-11-03 04:01:43,740 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) [2022-11-03 04:01:43,740 INFO L276 IsEmpty]: Start isEmpty. Operand 3569 states and 4758 transitions. [2022-11-03 04:01:43,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-03 04:01:43,749 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:43,750 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] [2022-11-03 04:01:43,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 04:01:43,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-03 04:01:43,963 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:43,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:43,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1765750631, now seen corresponding path program 1 times [2022-11-03 04:01:43,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:01:43,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72296642] [2022-11-03 04:01:43,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:43,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:01:43,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:44,059 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-03 04:01:44,060 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:01:44,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72296642] [2022-11-03 04:01:44,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72296642] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:01:44,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721075908] [2022-11-03 04:01:44,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:44,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:01:44,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:01:44,063 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:01:44,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 04:01:44,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:44,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 04:01:44,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:44,265 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 04:01:44,265 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:01:44,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721075908] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:01:44,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:01:44,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-03 04:01:44,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579024832] [2022-11-03 04:01:44,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:01:44,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:01:44,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:01:44,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:01:44,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:01:44,268 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) [2022-11-03 04:01:45,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:45,130 INFO L93 Difference]: Finished difference Result 5931 states and 8159 transitions. [2022-11-03 04:01:45,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:01:45,132 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 [2022-11-03 04:01:45,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:45,149 INFO L225 Difference]: With dead ends: 5931 [2022-11-03 04:01:45,149 INFO L226 Difference]: Without dead ends: 4157 [2022-11-03 04:01:45,157 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 [2022-11-03 04:01:45,158 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 179 mSDsluCounter, 28 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, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:45,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 211 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:01:45,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4157 states. [2022-11-03 04:01:45,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4157 to 4069. [2022-11-03 04:01:45,820 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) [2022-11-03 04:01:45,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4069 states to 4069 states and 5332 transitions. [2022-11-03 04:01:45,833 INFO L78 Accepts]: Start accepts. Automaton has 4069 states and 5332 transitions. Word has length 109 [2022-11-03 04:01:45,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:45,834 INFO L495 AbstractCegarLoop]: Abstraction has 4069 states and 5332 transitions. [2022-11-03 04:01:45,834 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) [2022-11-03 04:01:45,834 INFO L276 IsEmpty]: Start isEmpty. Operand 4069 states and 5332 transitions. [2022-11-03 04:01:45,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-03 04:01:45,843 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:45,843 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] [2022-11-03 04:01:45,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 04:01:46,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-03 04:01:46,071 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:46,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:46,071 INFO L85 PathProgramCache]: Analyzing trace with hash -2074189640, now seen corresponding path program 1 times [2022-11-03 04:01:46,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:01:46,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59938239] [2022-11-03 04:01:46,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:46,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:01:46,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:46,168 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-03 04:01:46,168 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:01:46,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59938239] [2022-11-03 04:01:46,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59938239] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:01:46,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961848713] [2022-11-03 04:01:46,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:46,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:01:46,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:01:46,170 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:01:46,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 04:01:46,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:46,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 04:01:46,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:46,337 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 04:01:46,337 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:01:46,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961848713] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:01:46,338 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:01:46,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-03 04:01:46,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252652215] [2022-11-03 04:01:46,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:01:46,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:01:46,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:01:46,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:01:46,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:01:46,340 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) [2022-11-03 04:01:47,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:47,250 INFO L93 Difference]: Finished difference Result 6695 states and 9021 transitions. [2022-11-03 04:01:47,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:01:47,250 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 [2022-11-03 04:01:47,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:47,267 INFO L225 Difference]: With dead ends: 6695 [2022-11-03 04:01:47,267 INFO L226 Difference]: Without dead ends: 4563 [2022-11-03 04:01:47,278 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 [2022-11-03 04:01:47,279 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 54 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-11-03 04:01:47,279 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] [2022-11-03 04:01:47,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4563 states. [2022-11-03 04:01:47,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4563 to 4275. [2022-11-03 04:01:47,850 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) [2022-11-03 04:01:47,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4275 states to 4275 states and 5644 transitions. [2022-11-03 04:01:47,864 INFO L78 Accepts]: Start accepts. Automaton has 4275 states and 5644 transitions. Word has length 109 [2022-11-03 04:01:47,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:47,865 INFO L495 AbstractCegarLoop]: Abstraction has 4275 states and 5644 transitions. [2022-11-03 04:01:47,865 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) [2022-11-03 04:01:47,865 INFO L276 IsEmpty]: Start isEmpty. Operand 4275 states and 5644 transitions. [2022-11-03 04:01:47,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-03 04:01:47,874 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:47,875 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] [2022-11-03 04:01:47,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 04:01:48,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:01:48,103 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:48,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:48,103 INFO L85 PathProgramCache]: Analyzing trace with hash -730651071, now seen corresponding path program 2 times [2022-11-03 04:01:48,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:01:48,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724643055] [2022-11-03 04:01:48,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:48,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:01:48,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:48,309 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-03 04:01:48,309 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:01:48,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724643055] [2022-11-03 04:01:48,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724643055] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:01:48,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082708450] [2022-11-03 04:01:48,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 04:01:48,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:01:48,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:01:48,311 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:01:48,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 04:01:48,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 04:01:48,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:01:48,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 04:01:48,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:48,455 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 04:01:48,455 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:01:48,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082708450] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:01:48,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:01:48,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 04:01:48,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079322864] [2022-11-03 04:01:48,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:01:48,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:01:48,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:01:48,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:01:48,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:01:48,457 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) [2022-11-03 04:01:49,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:49,360 INFO L93 Difference]: Finished difference Result 7210 states and 9929 transitions. [2022-11-03 04:01:49,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:01:49,361 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 [2022-11-03 04:01:49,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:49,379 INFO L225 Difference]: With dead ends: 7210 [2022-11-03 04:01:49,379 INFO L226 Difference]: Without dead ends: 4872 [2022-11-03 04:01:49,389 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 [2022-11-03 04:01:49,390 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 109 mSDsluCounter, 197 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 [2022-11-03 04:01:49,391 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] [2022-11-03 04:01:49,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4872 states. [2022-11-03 04:01:50,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4872 to 4798. [2022-11-03 04:01:50,195 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) [2022-11-03 04:01:50,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4798 states to 4798 states and 6357 transitions. [2022-11-03 04:01:50,208 INFO L78 Accepts]: Start accepts. Automaton has 4798 states and 6357 transitions. Word has length 109 [2022-11-03 04:01:50,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:50,208 INFO L495 AbstractCegarLoop]: Abstraction has 4798 states and 6357 transitions. [2022-11-03 04:01:50,208 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) [2022-11-03 04:01:50,208 INFO L276 IsEmpty]: Start isEmpty. Operand 4798 states and 6357 transitions. [2022-11-03 04:01:50,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 04:01:50,216 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:50,216 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] [2022-11-03 04:01:50,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-03 04:01:50,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-03 04:01:50,431 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:50,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:50,431 INFO L85 PathProgramCache]: Analyzing trace with hash 244107795, now seen corresponding path program 1 times [2022-11-03 04:01:50,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:01:50,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118626342] [2022-11-03 04:01:50,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:50,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:01:50,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:50,632 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-03 04:01:50,632 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:01:50,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118626342] [2022-11-03 04:01:50,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118626342] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:01:50,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160595960] [2022-11-03 04:01:50,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:50,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:01:50,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:01:50,634 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:01:50,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 04:01:50,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:50,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 04:01:50,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:50,812 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 04:01:50,812 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:01:50,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160595960] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:01:50,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:01:50,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 04:01:50,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797004838] [2022-11-03 04:01:50,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:01:50,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:01:50,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:01:50,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:01:50,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:01:50,814 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) [2022-11-03 04:01:51,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:51,819 INFO L93 Difference]: Finished difference Result 9794 states and 13423 transitions. [2022-11-03 04:01:51,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:01:51,821 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 [2022-11-03 04:01:51,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:51,848 INFO L225 Difference]: With dead ends: 9794 [2022-11-03 04:01:51,848 INFO L226 Difference]: Without dead ends: 6165 [2022-11-03 04:01:51,859 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 [2022-11-03 04:01:51,859 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 51 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-11-03 04:01:51,860 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] [2022-11-03 04:01:51,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6165 states. [2022-11-03 04:01:52,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6165 to 5238. [2022-11-03 04:01:52,608 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) [2022-11-03 04:01:52,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5238 states to 5238 states and 7009 transitions. [2022-11-03 04:01:52,619 INFO L78 Accepts]: Start accepts. Automaton has 5238 states and 7009 transitions. Word has length 110 [2022-11-03 04:01:52,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:52,674 INFO L495 AbstractCegarLoop]: Abstraction has 5238 states and 7009 transitions. [2022-11-03 04:01:52,674 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) [2022-11-03 04:01:52,674 INFO L276 IsEmpty]: Start isEmpty. Operand 5238 states and 7009 transitions. [2022-11-03 04:01:52,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-03 04:01:52,683 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:52,684 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] [2022-11-03 04:01:52,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-03 04:01:52,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-03 04:01:52,895 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:52,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:52,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1003080199, now seen corresponding path program 1 times [2022-11-03 04:01:52,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:01:52,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261435196] [2022-11-03 04:01:52,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:52,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:01:52,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:53,113 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 18 proven. 26 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-03 04:01:53,113 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:01:53,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261435196] [2022-11-03 04:01:53,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261435196] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:01:53,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448100466] [2022-11-03 04:01:53,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:53,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:01:53,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:01:53,115 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:01:53,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 04:01:53,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:53,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 04:01:53,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:53,375 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-03 04:01:53,375 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:01:53,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448100466] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:01:53,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:01:53,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-11-03 04:01:53,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948349449] [2022-11-03 04:01:53,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:01:53,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:01:53,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:01:53,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:01:53,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-03 04:01:53,377 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) [2022-11-03 04:01:54,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:54,911 INFO L93 Difference]: Finished difference Result 11196 states and 15291 transitions. [2022-11-03 04:01:54,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:01:54,912 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 [2022-11-03 04:01:54,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:54,943 INFO L225 Difference]: With dead ends: 11196 [2022-11-03 04:01:54,943 INFO L226 Difference]: Without dead ends: 7127 [2022-11-03 04:01:54,955 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 [2022-11-03 04:01:54,956 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 396 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:54,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [418 Valid, 414 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 04:01:54,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7127 states. [2022-11-03 04:01:56,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7127 to 7125. [2022-11-03 04:01:56,184 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) [2022-11-03 04:01:56,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7125 states to 7125 states and 9534 transitions. [2022-11-03 04:01:56,204 INFO L78 Accepts]: Start accepts. Automaton has 7125 states and 9534 transitions. Word has length 111 [2022-11-03 04:01:56,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:56,204 INFO L495 AbstractCegarLoop]: Abstraction has 7125 states and 9534 transitions. [2022-11-03 04:01:56,205 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) [2022-11-03 04:01:56,205 INFO L276 IsEmpty]: Start isEmpty. Operand 7125 states and 9534 transitions. [2022-11-03 04:01:56,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-03 04:01:56,213 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:56,213 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] [2022-11-03 04:01:56,251 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-03 04:01:56,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-03 04:01:56,439 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:56,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:56,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1746096297, now seen corresponding path program 1 times [2022-11-03 04:01:56,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:01:56,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582092936] [2022-11-03 04:01:56,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:56,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:01:56,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:56,541 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-03 04:01:56,541 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:01:56,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582092936] [2022-11-03 04:01:56,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582092936] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:01:56,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124815191] [2022-11-03 04:01:56,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:56,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:01:56,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:01:56,543 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:01:56,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-03 04:01:56,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:56,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 04:01:56,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:56,710 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 04:01:56,710 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:01:56,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124815191] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:01:56,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:01:56,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-03 04:01:56,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859704460] [2022-11-03 04:01:56,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:01:56,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:01:56,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:01:56,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:01:56,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:01:56,712 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) [2022-11-03 04:01:58,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:58,128 INFO L93 Difference]: Finished difference Result 12540 states and 17196 transitions. [2022-11-03 04:01:58,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:01:58,129 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 [2022-11-03 04:01:58,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:58,160 INFO L225 Difference]: With dead ends: 12540 [2022-11-03 04:01:58,160 INFO L226 Difference]: Without dead ends: 8531 [2022-11-03 04:01:58,173 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 [2022-11-03 04:01:58,173 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 59 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-11-03 04:01:58,174 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] [2022-11-03 04:01:58,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8531 states. [2022-11-03 04:01:59,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8531 to 7809. [2022-11-03 04:01:59,514 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) [2022-11-03 04:01:59,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7809 states to 7809 states and 10524 transitions. [2022-11-03 04:01:59,535 INFO L78 Accepts]: Start accepts. Automaton has 7809 states and 10524 transitions. Word has length 111 [2022-11-03 04:01:59,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:59,536 INFO L495 AbstractCegarLoop]: Abstraction has 7809 states and 10524 transitions. [2022-11-03 04:01:59,536 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) [2022-11-03 04:01:59,536 INFO L276 IsEmpty]: Start isEmpty. Operand 7809 states and 10524 transitions. [2022-11-03 04:01:59,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-03 04:01:59,544 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:59,544 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] [2022-11-03 04:01:59,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-03 04:01:59,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:01:59,745 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:59,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:59,746 INFO L85 PathProgramCache]: Analyzing trace with hash 322754275, now seen corresponding path program 1 times [2022-11-03 04:01:59,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:01:59,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746148133] [2022-11-03 04:01:59,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:59,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:01:59,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:59,929 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 19 proven. 27 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-03 04:01:59,930 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:01:59,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746148133] [2022-11-03 04:01:59,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746148133] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:01:59,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87684418] [2022-11-03 04:01:59,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:59,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:01:59,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:01:59,935 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:01:59,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-03 04:02:00,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:00,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 04:02:00,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:00,136 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 04:02:00,137 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:00,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87684418] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:00,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:02:00,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 04:02:00,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841499110] [2022-11-03 04:02:00,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:00,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:02:00,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:02:00,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:02:00,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:02:00,140 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) [2022-11-03 04:02:01,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:01,984 INFO L93 Difference]: Finished difference Result 12522 states and 17554 transitions. [2022-11-03 04:02:01,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:02:01,985 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 [2022-11-03 04:02:01,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:02,012 INFO L225 Difference]: With dead ends: 12522 [2022-11-03 04:02:02,012 INFO L226 Difference]: Without dead ends: 7829 [2022-11-03 04:02:02,027 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 [2022-11-03 04:02:02,028 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 90 mSDsluCounter, 197 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 [2022-11-03 04:02:02,028 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] [2022-11-03 04:02:02,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7829 states. [2022-11-03 04:02:03,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7829 to 7757. [2022-11-03 04:02:03,569 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) [2022-11-03 04:02:03,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7757 states to 7757 states and 10312 transitions. [2022-11-03 04:02:03,586 INFO L78 Accepts]: Start accepts. Automaton has 7757 states and 10312 transitions. Word has length 112 [2022-11-03 04:02:03,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:03,586 INFO L495 AbstractCegarLoop]: Abstraction has 7757 states and 10312 transitions. [2022-11-03 04:02:03,586 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) [2022-11-03 04:02:03,587 INFO L276 IsEmpty]: Start isEmpty. Operand 7757 states and 10312 transitions. [2022-11-03 04:02:03,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-03 04:02:03,598 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:03,598 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] [2022-11-03 04:02:03,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:03,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-03 04:02:03,802 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:03,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:03,803 INFO L85 PathProgramCache]: Analyzing trace with hash -651480987, now seen corresponding path program 1 times [2022-11-03 04:02:03,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:02:03,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616826846] [2022-11-03 04:02:03,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:03,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:02:03,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:03,994 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 19 proven. 25 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-03 04:02:03,995 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:02:03,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616826846] [2022-11-03 04:02:03,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616826846] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:02:03,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809579905] [2022-11-03 04:02:03,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:03,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:02:03,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:02:03,997 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:02:04,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-03 04:02:04,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:04,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 04:02:04,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:04,231 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-03 04:02:04,231 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:04,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809579905] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:04,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:02:04,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-11-03 04:02:04,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143480582] [2022-11-03 04:02:04,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:04,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:02:04,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:02:04,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:02:04,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:02:04,234 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) [2022-11-03 04:02:06,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:06,492 INFO L93 Difference]: Finished difference Result 17307 states and 23235 transitions. [2022-11-03 04:02:06,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:02:06,493 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 [2022-11-03 04:02:06,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:06,522 INFO L225 Difference]: With dead ends: 17307 [2022-11-03 04:02:06,522 INFO L226 Difference]: Without dead ends: 10719 [2022-11-03 04:02:06,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-03 04:02:06,538 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 377 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:06,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [399 Valid, 412 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 04:02:06,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10719 states. [2022-11-03 04:02:08,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10719 to 10717. [2022-11-03 04:02:08,649 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) [2022-11-03 04:02:08,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10717 states to 10717 states and 14087 transitions. [2022-11-03 04:02:08,673 INFO L78 Accepts]: Start accepts. Automaton has 10717 states and 14087 transitions. Word has length 112 [2022-11-03 04:02:08,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:08,674 INFO L495 AbstractCegarLoop]: Abstraction has 10717 states and 14087 transitions. [2022-11-03 04:02:08,674 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) [2022-11-03 04:02:08,674 INFO L276 IsEmpty]: Start isEmpty. Operand 10717 states and 14087 transitions. [2022-11-03 04:02:08,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-03 04:02:08,687 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:08,687 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] [2022-11-03 04:02:08,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:08,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-03 04:02:08,888 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:08,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:08,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1843676902, now seen corresponding path program 1 times [2022-11-03 04:02:08,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:02:08,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286343358] [2022-11-03 04:02:08,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:08,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:02:08,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:08,986 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-03 04:02:08,987 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:02:08,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286343358] [2022-11-03 04:02:08,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286343358] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:02:08,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013213442] [2022-11-03 04:02:08,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:08,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:02:08,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:02:08,989 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:02:09,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-03 04:02:09,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:09,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 04:02:09,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:09,157 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 04:02:09,157 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:09,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013213442] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:09,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:02:09,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-03 04:02:09,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57652158] [2022-11-03 04:02:09,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:09,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:02:09,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:02:09,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:02:09,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:02:09,159 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) [2022-11-03 04:02:11,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:11,858 INFO L93 Difference]: Finished difference Result 19525 states and 26071 transitions. [2022-11-03 04:02:11,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:02:11,859 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 [2022-11-03 04:02:11,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:11,889 INFO L225 Difference]: With dead ends: 19525 [2022-11-03 04:02:11,890 INFO L226 Difference]: Without dead ends: 13155 [2022-11-03 04:02:11,899 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 [2022-11-03 04:02:11,899 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 64 mSDsluCounter, 207 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 [2022-11-03 04:02:11,899 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] [2022-11-03 04:02:11,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13155 states. [2022-11-03 04:02:13,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13155 to 11865. [2022-11-03 04:02:13,493 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) [2022-11-03 04:02:13,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11865 states to 11865 states and 15605 transitions. [2022-11-03 04:02:13,526 INFO L78 Accepts]: Start accepts. Automaton has 11865 states and 15605 transitions. Word has length 115 [2022-11-03 04:02:13,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:13,526 INFO L495 AbstractCegarLoop]: Abstraction has 11865 states and 15605 transitions. [2022-11-03 04:02:13,527 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) [2022-11-03 04:02:13,527 INFO L276 IsEmpty]: Start isEmpty. Operand 11865 states and 15605 transitions. [2022-11-03 04:02:13,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-03 04:02:13,540 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:13,540 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] [2022-11-03 04:02:13,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:13,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:02:13,743 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:13,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:13,743 INFO L85 PathProgramCache]: Analyzing trace with hash -332806758, now seen corresponding path program 1 times [2022-11-03 04:02:13,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:02:13,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481913217] [2022-11-03 04:02:13,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:13,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:02:13,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:13,877 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-03 04:02:13,878 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:02:13,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481913217] [2022-11-03 04:02:13,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481913217] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:02:13,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284576729] [2022-11-03 04:02:13,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:13,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:02:13,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:02:13,880 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:02:13,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-03 04:02:14,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:14,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 04:02:14,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:14,044 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 04:02:14,044 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:14,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284576729] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:14,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:02:14,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2022-11-03 04:02:14,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190634814] [2022-11-03 04:02:14,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:14,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:02:14,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:02:14,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:02:14,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:02:14,046 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) [2022-11-03 04:02:16,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:16,077 INFO L93 Difference]: Finished difference Result 17502 states and 22962 transitions. [2022-11-03 04:02:16,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:02:16,078 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 [2022-11-03 04:02:16,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:16,101 INFO L225 Difference]: With dead ends: 17502 [2022-11-03 04:02:16,101 INFO L226 Difference]: Without dead ends: 12336 [2022-11-03 04:02:16,109 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 [2022-11-03 04:02:16,110 INFO L413 NwaCegarLoop]: 239 mSDtfsCounter, 192 mSDsluCounter, 375 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 [2022-11-03 04:02:16,110 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] [2022-11-03 04:02:16,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12336 states. [2022-11-03 04:02:18,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12336 to 12107. [2022-11-03 04:02:18,359 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) [2022-11-03 04:02:18,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12107 states to 12107 states and 15906 transitions. [2022-11-03 04:02:18,396 INFO L78 Accepts]: Start accepts. Automaton has 12107 states and 15906 transitions. Word has length 116 [2022-11-03 04:02:18,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:18,397 INFO L495 AbstractCegarLoop]: Abstraction has 12107 states and 15906 transitions. [2022-11-03 04:02:18,397 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) [2022-11-03 04:02:18,397 INFO L276 IsEmpty]: Start isEmpty. Operand 12107 states and 15906 transitions. [2022-11-03 04:02:18,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-03 04:02:18,410 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:18,410 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] [2022-11-03 04:02:18,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:18,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-11-03 04:02:18,611 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:18,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:18,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1522491441, now seen corresponding path program 1 times [2022-11-03 04:02:18,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:02:18,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748600247] [2022-11-03 04:02:18,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:18,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:02:18,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:18,683 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 28 proven. 11 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-03 04:02:18,683 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:02:18,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748600247] [2022-11-03 04:02:18,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748600247] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:02:18,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913239328] [2022-11-03 04:02:18,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:18,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:02:18,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:02:18,686 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:02:18,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-03 04:02:18,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:18,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 04:02:18,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:18,856 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 04:02:18,857 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:18,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913239328] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:18,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:02:18,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-11-03 04:02:18,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894809742] [2022-11-03 04:02:18,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:18,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:02:18,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:02:18,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:02:18,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:02:18,859 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) [2022-11-03 04:02:20,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:20,348 INFO L93 Difference]: Finished difference Result 17219 states and 22776 transitions. [2022-11-03 04:02:20,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:02:20,349 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 [2022-11-03 04:02:20,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:20,376 INFO L225 Difference]: With dead ends: 17219 [2022-11-03 04:02:20,377 INFO L226 Difference]: Without dead ends: 11849 [2022-11-03 04:02:20,388 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 [2022-11-03 04:02:20,389 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 22 mSDsluCounter, 200 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 [2022-11-03 04:02:20,389 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] [2022-11-03 04:02:20,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11849 states. [2022-11-03 04:02:21,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11849 to 11849. [2022-11-03 04:02:21,988 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) [2022-11-03 04:02:22,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11849 states to 11849 states and 15558 transitions. [2022-11-03 04:02:22,019 INFO L78 Accepts]: Start accepts. Automaton has 11849 states and 15558 transitions. Word has length 117 [2022-11-03 04:02:22,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:22,020 INFO L495 AbstractCegarLoop]: Abstraction has 11849 states and 15558 transitions. [2022-11-03 04:02:22,020 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) [2022-11-03 04:02:22,020 INFO L276 IsEmpty]: Start isEmpty. Operand 11849 states and 15558 transitions. [2022-11-03 04:02:22,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-03 04:02:22,029 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:22,030 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] [2022-11-03 04:02:22,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:22,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-11-03 04:02:22,230 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:22,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:22,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1849729441, now seen corresponding path program 1 times [2022-11-03 04:02:22,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:02:22,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396185681] [2022-11-03 04:02:22,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:22,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:02:22,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:22,390 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 31 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-03 04:02:22,390 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:02:22,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396185681] [2022-11-03 04:02:22,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396185681] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:02:22,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434381148] [2022-11-03 04:02:22,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:22,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:02:22,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:02:22,392 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:02:22,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-03 04:02:22,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:22,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 04:02:22,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:22,610 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 04:02:22,610 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:22,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434381148] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:22,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:02:22,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2022-11-03 04:02:22,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173585857] [2022-11-03 04:02:22,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:22,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:02:22,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:02:22,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:02:22,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:02:22,615 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) [2022-11-03 04:02:24,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:24,422 INFO L93 Difference]: Finished difference Result 20838 states and 28005 transitions. [2022-11-03 04:02:24,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:02:24,423 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 [2022-11-03 04:02:24,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:24,450 INFO L225 Difference]: With dead ends: 20838 [2022-11-03 04:02:24,451 INFO L226 Difference]: Without dead ends: 13356 [2022-11-03 04:02:24,467 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 [2022-11-03 04:02:24,468 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 164 mSDsluCounter, 35 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, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:24,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 226 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:02:24,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13356 states. [2022-11-03 04:02:26,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13356 to 13216. [2022-11-03 04:02:26,233 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) [2022-11-03 04:02:26,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13216 states to 13216 states and 17181 transitions. [2022-11-03 04:02:26,260 INFO L78 Accepts]: Start accepts. Automaton has 13216 states and 17181 transitions. Word has length 117 [2022-11-03 04:02:26,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:26,261 INFO L495 AbstractCegarLoop]: Abstraction has 13216 states and 17181 transitions. [2022-11-03 04:02:26,261 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) [2022-11-03 04:02:26,261 INFO L276 IsEmpty]: Start isEmpty. Operand 13216 states and 17181 transitions. [2022-11-03 04:02:26,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-03 04:02:26,273 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:26,273 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:02:26,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:26,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-11-03 04:02:26,489 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:26,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:26,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1005730431, now seen corresponding path program 1 times [2022-11-03 04:02:26,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:02:26,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608284081] [2022-11-03 04:02:26,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:26,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:02:26,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:26,545 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 30 proven. 5 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-03 04:02:26,545 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:02:26,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608284081] [2022-11-03 04:02:26,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608284081] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:02:26,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015274001] [2022-11-03 04:02:26,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:26,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:02:26,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:02:26,547 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:02:26,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-03 04:02:26,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:26,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 04:02:26,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:26,715 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 04:02:26,715 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:26,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015274001] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:26,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:02:26,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-11-03 04:02:26,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691503379] [2022-11-03 04:02:26,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:26,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:02:26,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:02:26,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:02:26,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:02:26,718 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) [2022-11-03 04:02:29,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:29,004 INFO L93 Difference]: Finished difference Result 21600 states and 29005 transitions. [2022-11-03 04:02:29,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:02:29,005 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 [2022-11-03 04:02:29,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:29,037 INFO L225 Difference]: With dead ends: 21600 [2022-11-03 04:02:29,037 INFO L226 Difference]: Without dead ends: 13191 [2022-11-03 04:02:29,050 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 [2022-11-03 04:02:29,051 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 87 mSDsluCounter, 196 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 [2022-11-03 04:02:29,051 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] [2022-11-03 04:02:29,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13191 states. [2022-11-03 04:02:30,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13191 to 13040. [2022-11-03 04:02:30,698 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) [2022-11-03 04:02:30,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13040 states to 13040 states and 16667 transitions. [2022-11-03 04:02:30,734 INFO L78 Accepts]: Start accepts. Automaton has 13040 states and 16667 transitions. Word has length 117 [2022-11-03 04:02:30,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:30,735 INFO L495 AbstractCegarLoop]: Abstraction has 13040 states and 16667 transitions. [2022-11-03 04:02:30,735 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) [2022-11-03 04:02:30,735 INFO L276 IsEmpty]: Start isEmpty. Operand 13040 states and 16667 transitions. [2022-11-03 04:02:30,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-03 04:02:30,747 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:30,747 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] [2022-11-03 04:02:30,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:30,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:02:30,967 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:30,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:30,967 INFO L85 PathProgramCache]: Analyzing trace with hash 2061203851, now seen corresponding path program 1 times [2022-11-03 04:02:30,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:02:30,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217885256] [2022-11-03 04:02:30,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:30,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:02:30,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:31,468 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-03 04:02:31,468 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:02:31,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217885256] [2022-11-03 04:02:31,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217885256] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:31,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:02:31,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-03 04:02:31,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684654899] [2022-11-03 04:02:31,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:31,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 04:02:31,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:02:31,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 04:02:31,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-03 04:02:31,470 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) [2022-11-03 04:02:36,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:36,350 INFO L93 Difference]: Finished difference Result 35890 states and 47411 transitions. [2022-11-03 04:02:36,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-03 04:02:36,350 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 [2022-11-03 04:02:36,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:36,407 INFO L225 Difference]: With dead ends: 35890 [2022-11-03 04:02:36,407 INFO L226 Difference]: Without dead ends: 25312 [2022-11-03 04:02:36,424 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 [2022-11-03 04:02:36,425 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 961 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 891 mSolverCounterSat, 362 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 987 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 1253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 362 IncrementalHoareTripleChecker+Valid, 891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:36,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [987 Valid, 626 Invalid, 1253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [362 Valid, 891 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 04:02:36,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25312 states. [2022-11-03 04:02:39,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25312 to 22073. [2022-11-03 04:02:39,469 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) [2022-11-03 04:02:39,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22073 states to 22073 states and 27959 transitions. [2022-11-03 04:02:39,513 INFO L78 Accepts]: Start accepts. Automaton has 22073 states and 27959 transitions. Word has length 114 [2022-11-03 04:02:39,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:39,514 INFO L495 AbstractCegarLoop]: Abstraction has 22073 states and 27959 transitions. [2022-11-03 04:02:39,514 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) [2022-11-03 04:02:39,514 INFO L276 IsEmpty]: Start isEmpty. Operand 22073 states and 27959 transitions. [2022-11-03 04:02:39,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-03 04:02:39,526 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:39,526 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] [2022-11-03 04:02:39,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-11-03 04:02:39,526 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:39,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:39,527 INFO L85 PathProgramCache]: Analyzing trace with hash 46418609, now seen corresponding path program 1 times [2022-11-03 04:02:39,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:02:39,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391697694] [2022-11-03 04:02:39,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:39,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:02:39,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:39,717 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-03 04:02:39,717 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:02:39,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391697694] [2022-11-03 04:02:39,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391697694] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:39,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:02:39,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:02:39,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386706306] [2022-11-03 04:02:39,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:39,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:02:39,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:02:39,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:02:39,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:02:39,719 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) [2022-11-03 04:02:44,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:44,058 INFO L93 Difference]: Finished difference Result 44532 states and 56161 transitions. [2022-11-03 04:02:44,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:02:44,059 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 [2022-11-03 04:02:44,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:44,098 INFO L225 Difference]: With dead ends: 44532 [2022-11-03 04:02:44,098 INFO L226 Difference]: Without dead ends: 19903 [2022-11-03 04:02:44,126 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 [2022-11-03 04:02:44,127 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 118 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:44,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 600 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 04:02:44,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19903 states. [2022-11-03 04:02:47,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19903 to 19046. [2022-11-03 04:02:47,173 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) [2022-11-03 04:02:47,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19046 states to 19046 states and 23415 transitions. [2022-11-03 04:02:47,209 INFO L78 Accepts]: Start accepts. Automaton has 19046 states and 23415 transitions. Word has length 115 [2022-11-03 04:02:47,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:47,209 INFO L495 AbstractCegarLoop]: Abstraction has 19046 states and 23415 transitions. [2022-11-03 04:02:47,210 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) [2022-11-03 04:02:47,210 INFO L276 IsEmpty]: Start isEmpty. Operand 19046 states and 23415 transitions. [2022-11-03 04:02:47,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-03 04:02:47,218 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:47,218 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] [2022-11-03 04:02:47,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-11-03 04:02:47,218 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:47,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:47,219 INFO L85 PathProgramCache]: Analyzing trace with hash 767769446, now seen corresponding path program 1 times [2022-11-03 04:02:47,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:02:47,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946218766] [2022-11-03 04:02:47,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:47,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:02:47,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:47,388 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 41 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 04:02:47,388 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:02:47,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946218766] [2022-11-03 04:02:47,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946218766] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:02:47,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372456646] [2022-11-03 04:02:47,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:47,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:02:47,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:02:47,391 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:02:47,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-03 04:02:47,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:47,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 04:02:47,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:47,606 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:47,607 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:02:47,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372456646] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:47,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:02:47,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2022-11-03 04:02:47,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897710908] [2022-11-03 04:02:47,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:47,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:02:47,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:02:47,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:02:47,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:02:47,609 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) [2022-11-03 04:02:51,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:51,841 INFO L93 Difference]: Finished difference Result 39065 states and 48550 transitions. [2022-11-03 04:02:51,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:02:51,842 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 [2022-11-03 04:02:51,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:51,889 INFO L225 Difference]: With dead ends: 39065 [2022-11-03 04:02:51,889 INFO L226 Difference]: Without dead ends: 25732 [2022-11-03 04:02:51,904 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 [2022-11-03 04:02:51,905 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 217 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:51,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 557 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 04:02:51,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25732 states. [2022-11-03 04:02:55,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25732 to 24258. [2022-11-03 04:02:55,407 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) [2022-11-03 04:02:55,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24258 states to 24258 states and 29867 transitions. [2022-11-03 04:02:55,450 INFO L78 Accepts]: Start accepts. Automaton has 24258 states and 29867 transitions. Word has length 116 [2022-11-03 04:02:55,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:55,450 INFO L495 AbstractCegarLoop]: Abstraction has 24258 states and 29867 transitions. [2022-11-03 04:02:55,451 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) [2022-11-03 04:02:55,451 INFO L276 IsEmpty]: Start isEmpty. Operand 24258 states and 29867 transitions. [2022-11-03 04:02:55,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:02:55,457 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:55,457 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] [2022-11-03 04:02:55,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:55,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-03 04:02:55,658 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:55,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:55,659 INFO L85 PathProgramCache]: Analyzing trace with hash -480707774, now seen corresponding path program 1 times [2022-11-03 04:02:55,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:02:55,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577097951] [2022-11-03 04:02:55,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:55,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:02:55,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:56,475 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 27 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-03 04:02:56,475 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:02:56,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577097951] [2022-11-03 04:02:56,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577097951] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:02:56,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023801301] [2022-11-03 04:02:56,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:56,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:02:56,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:02:56,477 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:02:56,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-03 04:02:56,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:56,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-03 04:02:56,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:57,507 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 60 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 04:02:57,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:02:59,536 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 13 proven. 44 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-03 04:02:59,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023801301] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:02:59,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1598684355] [2022-11-03 04:02:59,539 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2022-11-03 04:02:59,540 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 04:02:59,540 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 04:02:59,540 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 04:02:59,541 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 04:03:06,602 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 192 for LOIs [2022-11-03 04:03:07,038 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 140 for LOIs [2022-11-03 04:03:07,063 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 70 for LOIs [2022-11-03 04:03:07,072 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 204 for LOIs [2022-11-03 04:03:08,231 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 122 for LOIs [2022-11-03 04:03:08,392 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 70 for LOIs [2022-11-03 04:03:08,507 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 196 for LOIs [2022-11-03 04:03:09,064 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 219 for LOIs [2022-11-03 04:03:09,310 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 04:03:42,025 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 [2022-11-03 04:03:42,025 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 04:03:42,025 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 04:03:42,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 18, 18] total 55 [2022-11-03 04:03:42,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536486667] [2022-11-03 04:03:42,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 04:03:42,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-03 04:03:42,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:03:42,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-03 04:03:42,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=964, Invalid=11246, Unknown=0, NotChecked=0, Total=12210 [2022-11-03 04:03:42,029 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) [2022-11-03 04:04:02,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:04:02,908 INFO L93 Difference]: Finished difference Result 26542 states and 32569 transitions. [2022-11-03 04:04:02,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2022-11-03 04:04:02,909 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 [2022-11-03 04:04:02,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:04:02,961 INFO L225 Difference]: With dead ends: 26542 [2022-11-03 04:04:02,961 INFO L226 Difference]: Without dead ends: 25471 [2022-11-03 04:04:02,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 584 GetRequests, 318 SyntacticMatches, 6 SemanticMatches, 260 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26825 ImplicationChecksByTransitivity, 43.7s TimeCoverageRelationStatistics Valid=6762, Invalid=61620, Unknown=0, NotChecked=0, Total=68382 [2022-11-03 04:04:02,976 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 4928 mSDsluCounter, 3101 mSDsCounter, 0 mSdLazyCounter, 8368 mSolverCounterSat, 3644 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4928 SdHoareTripleChecker+Valid, 2861 SdHoareTripleChecker+Invalid, 12012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3644 IncrementalHoareTripleChecker+Valid, 8368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:04:02,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4928 Valid, 2861 Invalid, 12012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3644 Valid, 8368 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2022-11-03 04:04:02,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25471 states. [2022-11-03 04:04:06,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25471 to 24074. [2022-11-03 04:04:06,873 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) [2022-11-03 04:04:06,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24074 states to 24074 states and 29649 transitions. [2022-11-03 04:04:06,916 INFO L78 Accepts]: Start accepts. Automaton has 24074 states and 29649 transitions. Word has length 124 [2022-11-03 04:04:06,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:04:06,916 INFO L495 AbstractCegarLoop]: Abstraction has 24074 states and 29649 transitions. [2022-11-03 04:04:06,916 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) [2022-11-03 04:04:06,916 INFO L276 IsEmpty]: Start isEmpty. Operand 24074 states and 29649 transitions. [2022-11-03 04:04:06,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-03 04:04:06,927 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:04:06,927 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] [2022-11-03 04:04:06,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-03 04:04:07,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-03 04:04:07,131 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:04:07,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:04:07,131 INFO L85 PathProgramCache]: Analyzing trace with hash 300997334, now seen corresponding path program 1 times [2022-11-03 04:04:07,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:04:07,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457635142] [2022-11-03 04:04:07,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:07,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:04:07,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:07,309 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 38 proven. 9 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-03 04:04:07,309 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:04:07,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457635142] [2022-11-03 04:04:07,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457635142] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:04:07,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296313924] [2022-11-03 04:04:07,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:07,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:04:07,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:04:07,311 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:04:07,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-03 04:04:07,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:07,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 04:04:07,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:07,569 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 50 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 04:04:07,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:04:07,808 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-03 04:04:07,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296313924] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 04:04:07,809 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:04:07,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 10] total 17 [2022-11-03 04:04:07,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538984969] [2022-11-03 04:04:07,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:04:07,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 04:04:07,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:04:07,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 04:04:07,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-03 04:04:07,810 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) [2022-11-03 04:04:12,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:04:12,339 INFO L93 Difference]: Finished difference Result 24729 states and 30390 transitions. [2022-11-03 04:04:12,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 04:04:12,339 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 [2022-11-03 04:04:12,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:04:12,396 INFO L225 Difference]: With dead ends: 24729 [2022-11-03 04:04:12,396 INFO L226 Difference]: Without dead ends: 23842 [2022-11-03 04:04:12,405 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 [2022-11-03 04:04:12,406 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 408 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 04:04:12,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [410 Valid, 567 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 663 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 04:04:12,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23842 states. [2022-11-03 04:04:16,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23842 to 23805. [2022-11-03 04:04:16,346 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) [2022-11-03 04:04:16,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23805 states to 23805 states and 29327 transitions. [2022-11-03 04:04:16,389 INFO L78 Accepts]: Start accepts. Automaton has 23805 states and 29327 transitions. Word has length 125 [2022-11-03 04:04:16,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:04:16,389 INFO L495 AbstractCegarLoop]: Abstraction has 23805 states and 29327 transitions. [2022-11-03 04:04:16,389 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) [2022-11-03 04:04:16,389 INFO L276 IsEmpty]: Start isEmpty. Operand 23805 states and 29327 transitions. [2022-11-03 04:04:16,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-03 04:04:16,401 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:04:16,401 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] [2022-11-03 04:04:16,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-03 04:04:16,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-03 04:04:16,601 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:04:16,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:04:16,602 INFO L85 PathProgramCache]: Analyzing trace with hash 2075686238, now seen corresponding path program 1 times [2022-11-03 04:04:16,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:04:16,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691629027] [2022-11-03 04:04:16,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:16,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:04:16,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:16,741 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 31 proven. 19 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-03 04:04:16,742 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:04:16,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691629027] [2022-11-03 04:04:16,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691629027] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:04:16,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881030737] [2022-11-03 04:04:16,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:16,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:04:16,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:04:16,745 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:04:16,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-03 04:04:16,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:16,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 04:04:16,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:16,938 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-03 04:04:16,938 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:04:16,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881030737] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:04:16,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:04:16,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2022-11-03 04:04:16,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510770381] [2022-11-03 04:04:16,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:04:16,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:04:16,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:04:16,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:04:16,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:04:16,940 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) [2022-11-03 04:04:21,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:04:21,544 INFO L93 Difference]: Finished difference Result 42701 states and 53690 transitions. [2022-11-03 04:04:21,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:04:21,545 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 [2022-11-03 04:04:21,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:04:21,602 INFO L225 Difference]: With dead ends: 42701 [2022-11-03 04:04:21,602 INFO L226 Difference]: Without dead ends: 26600 [2022-11-03 04:04:21,624 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 [2022-11-03 04:04:21,624 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 165 mSDsluCounter, 35 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 [2022-11-03 04:04:21,624 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] [2022-11-03 04:04:21,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26600 states. [2022-11-03 04:04:26,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26600 to 25780. [2022-11-03 04:04:26,033 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) [2022-11-03 04:04:26,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25780 states to 25780 states and 31245 transitions. [2022-11-03 04:04:26,080 INFO L78 Accepts]: Start accepts. Automaton has 25780 states and 31245 transitions. Word has length 141 [2022-11-03 04:04:26,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:04:26,081 INFO L495 AbstractCegarLoop]: Abstraction has 25780 states and 31245 transitions. [2022-11-03 04:04:26,081 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) [2022-11-03 04:04:26,081 INFO L276 IsEmpty]: Start isEmpty. Operand 25780 states and 31245 transitions. [2022-11-03 04:04:26,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-03 04:04:26,093 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:04:26,093 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] [2022-11-03 04:04:26,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-03 04:04:26,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-03 04:04:26,294 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:04:26,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:04:26,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1258180528, now seen corresponding path program 1 times [2022-11-03 04:04:26,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:04:26,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402530595] [2022-11-03 04:04:26,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:26,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:04:26,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:26,530 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 43 proven. 36 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-11-03 04:04:26,531 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:04:26,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402530595] [2022-11-03 04:04:26,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402530595] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:04:26,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796584859] [2022-11-03 04:04:26,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:26,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:04:26,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:04:26,533 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:04:26,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-03 04:04:26,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:26,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 703 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 04:04:26,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:26,759 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 04:04:26,759 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:04:26,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796584859] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:04:26,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:04:26,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2022-11-03 04:04:26,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656192987] [2022-11-03 04:04:26,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:04:26,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:04:26,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:04:26,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:04:26,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:04:26,763 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) [2022-11-03 04:04:32,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:04:32,900 INFO L93 Difference]: Finished difference Result 51013 states and 62498 transitions. [2022-11-03 04:04:32,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:04:32,903 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 [2022-11-03 04:04:32,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:04:32,974 INFO L225 Difference]: With dead ends: 51013 [2022-11-03 04:04:32,974 INFO L226 Difference]: Without dead ends: 33309 [2022-11-03 04:04:32,998 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 [2022-11-03 04:04:32,999 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 231 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 04:04:32,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 549 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 04:04:33,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33309 states. [2022-11-03 04:04:39,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33309 to 31635. [2022-11-03 04:04:39,318 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) [2022-11-03 04:04:39,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31635 states to 31635 states and 38485 transitions. [2022-11-03 04:04:39,384 INFO L78 Accepts]: Start accepts. Automaton has 31635 states and 38485 transitions. Word has length 144 [2022-11-03 04:04:39,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:04:39,384 INFO L495 AbstractCegarLoop]: Abstraction has 31635 states and 38485 transitions. [2022-11-03 04:04:39,384 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) [2022-11-03 04:04:39,385 INFO L276 IsEmpty]: Start isEmpty. Operand 31635 states and 38485 transitions. [2022-11-03 04:04:39,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-11-03 04:04:39,403 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:04:39,403 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] [2022-11-03 04:04:39,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-03 04:04:39,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:04:39,604 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:04:39,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:04:39,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1919255000, now seen corresponding path program 1 times [2022-11-03 04:04:39,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:04:39,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083216899] [2022-11-03 04:04:39,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:39,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:04:39,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:40,201 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 30 proven. 73 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-03 04:04:40,201 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:04:40,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083216899] [2022-11-03 04:04:40,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083216899] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:04:40,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155453754] [2022-11-03 04:04:40,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:40,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:04:40,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:04:40,203 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:04:40,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-03 04:04:40,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:40,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 793 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 04:04:40,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:04:40,547 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 112 proven. 14 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 04:04:40,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:04:40,858 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 34 proven. 4 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-11-03 04:04:40,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155453754] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:04:40,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1108336341] [2022-11-03 04:04:40,861 INFO L159 IcfgInterpreter]: Started Sifa with 74 locations of interest [2022-11-03 04:04:40,862 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 04:04:40,862 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 04:04:40,862 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 04:04:40,862 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 04:05:09,629 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 204 for LOIs [2022-11-03 04:05:27,470 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 70 for LOIs [2022-11-03 04:05:27,480 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 212 for LOIs [2022-11-03 04:05:27,561 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 70 for LOIs [2022-11-03 04:05:27,724 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 70 for LOIs [2022-11-03 04:05:28,599 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 244 for LOIs [2022-11-03 04:05:41,684 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 04:06:05,305 WARN L234 SmtUtils]: Spent 20.90s on a formula simplification. DAG size of input: 425 DAG size of output: 375 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 04:06:23,254 WARN L234 SmtUtils]: Spent 8.48s on a formula simplification. DAG size of input: 482 DAG size of output: 338 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 04:06:42,057 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 [2022-11-03 04:06:42,057 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 04:06:42,057 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 04:06:42,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 6] total 21 [2022-11-03 04:06:42,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079555743] [2022-11-03 04:06:42,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 04:06:42,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-03 04:06:42,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:06:42,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-03 04:06:42,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=4987, Unknown=0, NotChecked=0, Total=5402 [2022-11-03 04:06:42,059 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) [2022-11-03 04:06:51,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:06:51,924 INFO L93 Difference]: Finished difference Result 54377 states and 66315 transitions. [2022-11-03 04:06:51,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-11-03 04:06:51,925 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 [2022-11-03 04:06:51,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:06:51,973 INFO L225 Difference]: With dead ends: 54377 [2022-11-03 04:06:51,973 INFO L226 Difference]: Without dead ends: 23406 [2022-11-03 04:06:52,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 670 GetRequests, 486 SyntacticMatches, 4 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14128 ImplicationChecksByTransitivity, 62.4s TimeCoverageRelationStatistics Valid=1910, Invalid=31032, Unknown=0, NotChecked=0, Total=32942 [2022-11-03 04:06:52,007 INFO L413 NwaCegarLoop]: 353 mSDtfsCounter, 1962 mSDsluCounter, 4421 mSDsCounter, 0 mSdLazyCounter, 4215 mSolverCounterSat, 750 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1981 SdHoareTripleChecker+Valid, 4027 SdHoareTripleChecker+Invalid, 4965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 750 IncrementalHoareTripleChecker+Valid, 4215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-03 04:06:52,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1981 Valid, 4027 Invalid, 4965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [750 Valid, 4215 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-03 04:06:52,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23406 states. [2022-11-03 04:06:55,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23406 to 17072. [2022-11-03 04:06:55,119 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) [2022-11-03 04:06:55,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17072 states to 17072 states and 19946 transitions. [2022-11-03 04:06:55,147 INFO L78 Accepts]: Start accepts. Automaton has 17072 states and 19946 transitions. Word has length 159 [2022-11-03 04:06:55,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:06:55,147 INFO L495 AbstractCegarLoop]: Abstraction has 17072 states and 19946 transitions. [2022-11-03 04:06:55,147 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) [2022-11-03 04:06:55,147 INFO L276 IsEmpty]: Start isEmpty. Operand 17072 states and 19946 transitions. [2022-11-03 04:06:55,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-11-03 04:06:55,157 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:06:55,157 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] [2022-11-03 04:06:55,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-03 04:06:55,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:06:55,370 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:06:55,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:06:55,370 INFO L85 PathProgramCache]: Analyzing trace with hash 2021320345, now seen corresponding path program 1 times [2022-11-03 04:06:55,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:06:55,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757408617] [2022-11-03 04:06:55,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:06:55,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:06:55,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:06:55,631 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 33 proven. 38 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-03 04:06:55,631 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:06:55,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757408617] [2022-11-03 04:06:55,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757408617] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:06:55,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495969177] [2022-11-03 04:06:55,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:06:55,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:06:55,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:06:55,633 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:06:55,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01949c93-15e7-4e30-bd82-b23a243e9e1a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-03 04:06:55,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:06:55,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 04:06:55,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:06:55,962 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 111 proven. 14 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-03 04:06:55,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:06:56,273 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 33 proven. 4 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-11-03 04:06:56,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495969177] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:06:56,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1094607684] [2022-11-03 04:06:56,276 INFO L159 IcfgInterpreter]: Started Sifa with 77 locations of interest [2022-11-03 04:06:56,277 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 04:06:56,277 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 04:06:56,277 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 04:06:56,278 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs