./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.09.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28af170d-e50f-41aa-86d3-bf7f2322151c/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28af170d-e50f-41aa-86d3-bf7f2322151c/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28af170d-e50f-41aa-86d3-bf7f2322151c/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28af170d-e50f-41aa-86d3-bf7f2322151c/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.09.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28af170d-e50f-41aa-86d3-bf7f2322151c/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28af170d-e50f-41aa-86d3-bf7f2322151c/bin/uautomizer-DrprNOufMa --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 20da2548babe3ea7ba69c8856235b685b3dad9dcce2cbb8d7159e2037477f2fb --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 18:20:24,611 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 18:20:24,613 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 18:20:24,635 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 18:20:24,636 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 18:20:24,637 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 18:20:24,638 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 18:20:24,640 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 18:20:24,641 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 18:20:24,642 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 18:20:24,643 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 18:20:24,644 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 18:20:24,645 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 18:20:24,645 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 18:20:24,647 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 18:20:24,648 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 18:20:24,649 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 18:20:24,649 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 18:20:24,651 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 18:20:24,653 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 18:20:24,654 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 18:20:24,656 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 18:20:24,658 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 18:20:24,658 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 18:20:24,662 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 18:20:24,663 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 18:20:24,663 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 18:20:24,664 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 18:20:24,665 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 18:20:24,666 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 18:20:24,666 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 18:20:24,667 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 18:20:24,668 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 18:20:24,669 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 18:20:24,670 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 18:20:24,670 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 18:20:24,671 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 18:20:24,671 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 18:20:24,671 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 18:20:24,672 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 18:20:24,673 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 18:20:24,674 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28af170d-e50f-41aa-86d3-bf7f2322151c/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 18:20:24,698 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 18:20:24,698 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 18:20:24,698 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 18:20:24,698 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 18:20:24,699 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 18:20:24,699 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 18:20:24,700 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 18:20:24,700 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 18:20:24,700 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 18:20:24,701 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 18:20:24,701 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 18:20:24,701 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 18:20:24,701 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 18:20:24,701 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 18:20:24,702 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 18:20:24,702 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 18:20:24,702 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 18:20:24,702 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 18:20:24,702 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 18:20:24,702 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 18:20:24,703 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 18:20:24,703 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 18:20:24,703 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 18:20:24,703 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 18:20:24,704 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:20:24,704 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 18:20:24,704 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 18:20:24,704 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 18:20:24,704 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 18:20:24,705 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 18:20:24,705 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 18:20:24,705 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 18:20:24,705 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 18:20:24,705 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 18:20:24,706 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_28af170d-e50f-41aa-86d3-bf7f2322151c/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28af170d-e50f-41aa-86d3-bf7f2322151c/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 20da2548babe3ea7ba69c8856235b685b3dad9dcce2cbb8d7159e2037477f2fb [2021-12-06 18:20:24,881 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 18:20:24,896 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 18:20:24,898 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 18:20:24,899 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 18:20:24,900 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 18:20:24,901 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28af170d-e50f-41aa-86d3-bf7f2322151c/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.09.cil-2.c [2021-12-06 18:20:24,945 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28af170d-e50f-41aa-86d3-bf7f2322151c/bin/uautomizer-DrprNOufMa/data/3ee603327/7513366639d2442197c7eb1285e15382/FLAG0b39d3d6d [2021-12-06 18:20:25,351 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 18:20:25,352 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28af170d-e50f-41aa-86d3-bf7f2322151c/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.09.cil-2.c [2021-12-06 18:20:25,362 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28af170d-e50f-41aa-86d3-bf7f2322151c/bin/uautomizer-DrprNOufMa/data/3ee603327/7513366639d2442197c7eb1285e15382/FLAG0b39d3d6d [2021-12-06 18:20:25,371 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28af170d-e50f-41aa-86d3-bf7f2322151c/bin/uautomizer-DrprNOufMa/data/3ee603327/7513366639d2442197c7eb1285e15382 [2021-12-06 18:20:25,373 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 18:20:25,374 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 18:20:25,375 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 18:20:25,375 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 18:20:25,377 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 18:20:25,378 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:20:25" (1/1) ... [2021-12-06 18:20:25,379 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@321a81d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:20:25, skipping insertion in model container [2021-12-06 18:20:25,379 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:20:25" (1/1) ... [2021-12-06 18:20:25,388 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 18:20:25,418 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 18:20:25,547 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_28af170d-e50f-41aa-86d3-bf7f2322151c/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.09.cil-2.c[911,924] [2021-12-06 18:20:25,599 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_28af170d-e50f-41aa-86d3-bf7f2322151c/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.09.cil-2.c[8416,8429] [2021-12-06 18:20:25,671 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:20:25,679 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 18:20:25,691 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_28af170d-e50f-41aa-86d3-bf7f2322151c/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.09.cil-2.c[911,924] [2021-12-06 18:20:25,712 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_28af170d-e50f-41aa-86d3-bf7f2322151c/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.09.cil-2.c[8416,8429] [2021-12-06 18:20:25,750 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:20:25,770 INFO L208 MainTranslator]: Completed translation [2021-12-06 18:20:25,770 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:20:25 WrapperNode [2021-12-06 18:20:25,771 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 18:20:25,771 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 18:20:25,771 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 18:20:25,772 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 18:20:25,777 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:20:25" (1/1) ... [2021-12-06 18:20:25,792 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:20:25" (1/1) ... [2021-12-06 18:20:25,831 INFO L137 Inliner]: procedures = 73, calls = 89, calls flagged for inlining = 41, calls inlined = 41, statements flattened = 909 [2021-12-06 18:20:25,831 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 18:20:25,831 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 18:20:25,831 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 18:20:25,832 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 18:20:25,838 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:20:25" (1/1) ... [2021-12-06 18:20:25,838 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:20:25" (1/1) ... [2021-12-06 18:20:25,842 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:20:25" (1/1) ... [2021-12-06 18:20:25,842 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:20:25" (1/1) ... [2021-12-06 18:20:25,855 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:20:25" (1/1) ... [2021-12-06 18:20:25,867 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:20:25" (1/1) ... [2021-12-06 18:20:25,870 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:20:25" (1/1) ... [2021-12-06 18:20:25,875 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 18:20:25,875 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 18:20:25,875 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 18:20:25,876 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 18:20:25,876 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:20:25" (1/1) ... [2021-12-06 18:20:25,883 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:20:25,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28af170d-e50f-41aa-86d3-bf7f2322151c/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:20:25,905 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28af170d-e50f-41aa-86d3-bf7f2322151c/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 18:20:25,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28af170d-e50f-41aa-86d3-bf7f2322151c/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 18:20:25,943 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 18:20:25,944 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-06 18:20:25,944 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-06 18:20:25,944 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2021-12-06 18:20:25,944 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2021-12-06 18:20:25,944 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-06 18:20:25,944 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-06 18:20:25,944 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-06 18:20:25,945 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-06 18:20:25,945 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2021-12-06 18:20:25,945 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2021-12-06 18:20:25,945 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-06 18:20:25,945 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-06 18:20:25,945 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-06 18:20:25,945 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-06 18:20:25,945 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2021-12-06 18:20:25,946 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2021-12-06 18:20:25,946 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2021-12-06 18:20:25,946 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2021-12-06 18:20:25,946 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2021-12-06 18:20:25,946 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2021-12-06 18:20:25,946 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-06 18:20:25,946 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-06 18:20:25,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 18:20:25,946 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-06 18:20:25,947 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-06 18:20:25,947 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2021-12-06 18:20:25,947 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2021-12-06 18:20:25,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 18:20:25,947 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 18:20:25,947 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-06 18:20:25,947 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-06 18:20:25,947 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2021-12-06 18:20:25,947 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2021-12-06 18:20:26,042 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 18:20:26,044 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 18:20:26,505 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##56: assume !(1 == ~q_free~0); [2021-12-06 18:20:26,505 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##55: assume 1 == ~q_free~0;~c_dr_st~0 := 2;~c_dr_pc~0 := 2;~a_t~0 := do_read_c_~a~0#1; [2021-12-06 18:20:26,549 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 18:20:26,558 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 18:20:26,558 INFO L301 CfgBuilder]: Removed 16 assume(true) statements. [2021-12-06 18:20:26,560 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:20:26 BoogieIcfgContainer [2021-12-06 18:20:26,560 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 18:20:26,561 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 18:20:26,561 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 18:20:26,564 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 18:20:26,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 06:20:25" (1/3) ... [2021-12-06 18:20:26,565 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53b682ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:20:26, skipping insertion in model container [2021-12-06 18:20:26,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:20:25" (2/3) ... [2021-12-06 18:20:26,565 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53b682ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:20:26, skipping insertion in model container [2021-12-06 18:20:26,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:20:26" (3/3) ... [2021-12-06 18:20:26,566 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_3.cil+token_ring.09.cil-2.c [2021-12-06 18:20:26,570 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 18:20:26,570 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-06 18:20:26,606 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 18:20:26,611 INFO L339 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=PETRI_NET, 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 18:20:26,611 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-06 18:20:26,631 INFO L276 IsEmpty]: Start isEmpty. Operand has 432 states, 373 states have (on average 1.6300268096514745) internal successors, (608), 381 states have internal predecessors, (608), 41 states have call successors, (41), 15 states have call predecessors, (41), 15 states have return successors, (41), 39 states have call predecessors, (41), 41 states have call successors, (41) [2021-12-06 18:20:26,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-06 18:20:26,639 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:20:26,639 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:20:26,640 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:20:26,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:20:26,644 INFO L85 PathProgramCache]: Analyzing trace with hash 140273204, now seen corresponding path program 1 times [2021-12-06 18:20:26,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:20:26,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999648542] [2021-12-06 18:20:26,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:26,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:20:26,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:26,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 18:20:26,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:26,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:20:26,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:26,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 18:20:26,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:26,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:26,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:26,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:20:26,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:26,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 18:20:26,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:26,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 18:20:26,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:26,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:20:26,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:20:26,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999648542] [2021-12-06 18:20:26,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999648542] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:20:26,859 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:20:26,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 18:20:26,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051176383] [2021-12-06 18:20:26,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:20:26,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:20:26,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:20:26,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:20:26,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:20:26,894 INFO L87 Difference]: Start difference. First operand has 432 states, 373 states have (on average 1.6300268096514745) internal successors, (608), 381 states have internal predecessors, (608), 41 states have call successors, (41), 15 states have call predecessors, (41), 15 states have return successors, (41), 39 states have call predecessors, (41), 41 states have call successors, (41) Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-06 18:20:27,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:20:27,400 INFO L93 Difference]: Finished difference Result 857 states and 1368 transitions. [2021-12-06 18:20:27,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 18:20:27,402 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-06 18:20:27,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:20:27,418 INFO L225 Difference]: With dead ends: 857 [2021-12-06 18:20:27,418 INFO L226 Difference]: Without dead ends: 439 [2021-12-06 18:20:27,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-06 18:20:27,428 INFO L933 BasicCegarLoop]: 649 mSDtfsCounter, 669 mSDsluCounter, 1178 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 681 SdHoareTripleChecker+Valid, 1827 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:20:27,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [681 Valid, 1827 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 18:20:27,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-12-06 18:20:27,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 421. [2021-12-06 18:20:27,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 365 states have (on average 1.5424657534246575) internal successors, (563), 370 states have internal predecessors, (563), 41 states have call successors, (41), 15 states have call predecessors, (41), 13 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2021-12-06 18:20:27,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 641 transitions. [2021-12-06 18:20:27,499 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 641 transitions. Word has length 65 [2021-12-06 18:20:27,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:20:27,500 INFO L470 AbstractCegarLoop]: Abstraction has 421 states and 641 transitions. [2021-12-06 18:20:27,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-06 18:20:27,500 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 641 transitions. [2021-12-06 18:20:27,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-06 18:20:27,503 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:20:27,504 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:20:27,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 18:20:27,504 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:20:27,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:20:27,505 INFO L85 PathProgramCache]: Analyzing trace with hash 99598454, now seen corresponding path program 1 times [2021-12-06 18:20:27,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:20:27,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571389369] [2021-12-06 18:20:27,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:27,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:20:27,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:27,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 18:20:27,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:27,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:20:27,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:27,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 18:20:27,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:27,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:27,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:27,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:20:27,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:27,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 18:20:27,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:27,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 18:20:27,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:27,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:20:27,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:20:27,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571389369] [2021-12-06 18:20:27,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571389369] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:20:27,629 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:20:27,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-06 18:20:27,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043355928] [2021-12-06 18:20:27,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:20:27,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 18:20:27,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:20:27,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 18:20:27,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-06 18:20:27,631 INFO L87 Difference]: Start difference. First operand 421 states and 641 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-06 18:20:28,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:20:28,240 INFO L93 Difference]: Finished difference Result 676 states and 1010 transitions. [2021-12-06 18:20:28,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 18:20:28,240 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-06 18:20:28,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:20:28,248 INFO L225 Difference]: With dead ends: 676 [2021-12-06 18:20:28,249 INFO L226 Difference]: Without dead ends: 572 [2021-12-06 18:20:28,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-12-06 18:20:28,250 INFO L933 BasicCegarLoop]: 647 mSDtfsCounter, 1098 mSDsluCounter, 1549 mSDsCounter, 0 mSdLazyCounter, 946 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1105 SdHoareTripleChecker+Valid, 2196 SdHoareTripleChecker+Invalid, 1152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 18:20:28,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1105 Valid, 2196 Invalid, 1152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 946 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 18:20:28,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-12-06 18:20:28,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 533. [2021-12-06 18:20:28,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 455 states have (on average 1.5142857142857142) internal successors, (689), 462 states have internal predecessors, (689), 54 states have call successors, (54), 22 states have call predecessors, (54), 22 states have return successors, (55), 51 states have call predecessors, (55), 50 states have call successors, (55) [2021-12-06 18:20:28,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 798 transitions. [2021-12-06 18:20:28,286 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 798 transitions. Word has length 65 [2021-12-06 18:20:28,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:20:28,287 INFO L470 AbstractCegarLoop]: Abstraction has 533 states and 798 transitions. [2021-12-06 18:20:28,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-06 18:20:28,287 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 798 transitions. [2021-12-06 18:20:28,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-06 18:20:28,289 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:20:28,289 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:20:28,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 18:20:28,290 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:20:28,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:20:28,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1778487094, now seen corresponding path program 1 times [2021-12-06 18:20:28,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:20:28,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795430638] [2021-12-06 18:20:28,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:28,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:20:28,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:28,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 18:20:28,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:28,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:20:28,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:28,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 18:20:28,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:28,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:28,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:28,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:20:28,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:28,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 18:20:28,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:28,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 18:20:28,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:28,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:20:28,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:20:28,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795430638] [2021-12-06 18:20:28,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795430638] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:20:28,382 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:20:28,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-06 18:20:28,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254852069] [2021-12-06 18:20:28,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:20:28,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 18:20:28,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:20:28,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 18:20:28,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-06 18:20:28,384 INFO L87 Difference]: Start difference. First operand 533 states and 798 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-06 18:20:29,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:20:29,140 INFO L93 Difference]: Finished difference Result 930 states and 1363 transitions. [2021-12-06 18:20:29,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 18:20:29,141 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-06 18:20:29,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:20:29,145 INFO L225 Difference]: With dead ends: 930 [2021-12-06 18:20:29,145 INFO L226 Difference]: Without dead ends: 721 [2021-12-06 18:20:29,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-12-06 18:20:29,147 INFO L933 BasicCegarLoop]: 674 mSDtfsCounter, 1553 mSDsluCounter, 1365 mSDsCounter, 0 mSdLazyCounter, 1183 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1584 SdHoareTripleChecker+Valid, 2039 SdHoareTripleChecker+Invalid, 1383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 1183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:20:29,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1584 Valid, 2039 Invalid, 1383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 1183 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 18:20:29,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2021-12-06 18:20:29,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 645. [2021-12-06 18:20:29,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 545 states have (on average 1.4935779816513761) internal successors, (814), 554 states have internal predecessors, (814), 67 states have call successors, (67), 29 states have call predecessors, (67), 31 states have return successors, (76), 65 states have call predecessors, (76), 63 states have call successors, (76) [2021-12-06 18:20:29,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 957 transitions. [2021-12-06 18:20:29,183 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 957 transitions. Word has length 65 [2021-12-06 18:20:29,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:20:29,183 INFO L470 AbstractCegarLoop]: Abstraction has 645 states and 957 transitions. [2021-12-06 18:20:29,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-06 18:20:29,184 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 957 transitions. [2021-12-06 18:20:29,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-06 18:20:29,186 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:20:29,186 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:20:29,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 18:20:29,186 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:20:29,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:20:29,187 INFO L85 PathProgramCache]: Analyzing trace with hash -250099016, now seen corresponding path program 1 times [2021-12-06 18:20:29,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:20:29,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605507225] [2021-12-06 18:20:29,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:29,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:20:29,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:29,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 18:20:29,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:29,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:20:29,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:29,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 18:20:29,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:29,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:29,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:29,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:20:29,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:29,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 18:20:29,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:29,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-06 18:20:29,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:29,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:20:29,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:20:29,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605507225] [2021-12-06 18:20:29,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605507225] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:20:29,282 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:20:29,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 18:20:29,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038881955] [2021-12-06 18:20:29,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:20:29,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 18:20:29,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:20:29,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 18:20:29,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:20:29,284 INFO L87 Difference]: Start difference. First operand 645 states and 957 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-06 18:20:30,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:20:30,446 INFO L93 Difference]: Finished difference Result 2191 states and 3154 transitions. [2021-12-06 18:20:30,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-06 18:20:30,446 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) Word has length 65 [2021-12-06 18:20:30,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:20:30,456 INFO L225 Difference]: With dead ends: 2191 [2021-12-06 18:20:30,457 INFO L226 Difference]: Without dead ends: 1858 [2021-12-06 18:20:30,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2021-12-06 18:20:30,460 INFO L933 BasicCegarLoop]: 767 mSDtfsCounter, 3779 mSDsluCounter, 1767 mSDsCounter, 0 mSdLazyCounter, 1610 mSolverCounterSat, 750 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3801 SdHoareTripleChecker+Valid, 2534 SdHoareTripleChecker+Invalid, 2360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 750 IncrementalHoareTripleChecker+Valid, 1610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 18:20:30,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3801 Valid, 2534 Invalid, 2360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [750 Valid, 1610 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 18:20:30,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2021-12-06 18:20:30,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 1698. [2021-12-06 18:20:30,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1698 states, 1393 states have (on average 1.407035175879397) internal successors, (1960), 1417 states have internal predecessors, (1960), 177 states have call successors, (177), 112 states have call predecessors, (177), 126 states have return successors, (209), 171 states have call predecessors, (209), 173 states have call successors, (209) [2021-12-06 18:20:30,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1698 states to 1698 states and 2346 transitions. [2021-12-06 18:20:30,555 INFO L78 Accepts]: Start accepts. Automaton has 1698 states and 2346 transitions. Word has length 65 [2021-12-06 18:20:30,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:20:30,556 INFO L470 AbstractCegarLoop]: Abstraction has 1698 states and 2346 transitions. [2021-12-06 18:20:30,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-06 18:20:30,556 INFO L276 IsEmpty]: Start isEmpty. Operand 1698 states and 2346 transitions. [2021-12-06 18:20:30,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-06 18:20:30,557 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:20:30,557 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:20:30,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 18:20:30,557 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:20:30,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:20:30,558 INFO L85 PathProgramCache]: Analyzing trace with hash -515912993, now seen corresponding path program 1 times [2021-12-06 18:20:30,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:20:30,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669398997] [2021-12-06 18:20:30,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:30,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:20:30,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:30,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 18:20:30,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:30,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:20:30,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:30,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 18:20:30,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:30,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:30,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:30,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-06 18:20:30,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:30,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 18:20:30,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:30,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-06 18:20:30,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:30,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:20:30,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:20:30,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669398997] [2021-12-06 18:20:30,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669398997] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:20:30,668 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:20:30,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-06 18:20:30,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352986087] [2021-12-06 18:20:30,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:20:30,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 18:20:30,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:20:30,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 18:20:30,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-06 18:20:30,669 INFO L87 Difference]: Start difference. First operand 1698 states and 2346 transitions. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 18:20:31,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:20:31,308 INFO L93 Difference]: Finished difference Result 3226 states and 4425 transitions. [2021-12-06 18:20:31,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 18:20:31,308 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2021-12-06 18:20:31,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:20:31,317 INFO L225 Difference]: With dead ends: 3226 [2021-12-06 18:20:31,317 INFO L226 Difference]: Without dead ends: 1846 [2021-12-06 18:20:31,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-06 18:20:31,320 INFO L933 BasicCegarLoop]: 626 mSDtfsCounter, 816 mSDsluCounter, 2075 mSDsCounter, 0 mSdLazyCounter, 1240 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 817 SdHoareTripleChecker+Valid, 2701 SdHoareTripleChecker+Invalid, 1385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 1240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 18:20:31,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [817 Valid, 2701 Invalid, 1385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 1240 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 18:20:31,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1846 states. [2021-12-06 18:20:31,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1846 to 1738. [2021-12-06 18:20:31,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1738 states, 1425 states have (on average 1.3936842105263159) internal successors, (1986), 1449 states have internal predecessors, (1986), 177 states have call successors, (177), 112 states have call predecessors, (177), 134 states have return successors, (217), 179 states have call predecessors, (217), 173 states have call successors, (217) [2021-12-06 18:20:31,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1738 states to 1738 states and 2380 transitions. [2021-12-06 18:20:31,400 INFO L78 Accepts]: Start accepts. Automaton has 1738 states and 2380 transitions. Word has length 66 [2021-12-06 18:20:31,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:20:31,400 INFO L470 AbstractCegarLoop]: Abstraction has 1738 states and 2380 transitions. [2021-12-06 18:20:31,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 18:20:31,401 INFO L276 IsEmpty]: Start isEmpty. Operand 1738 states and 2380 transitions. [2021-12-06 18:20:31,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-06 18:20:31,401 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:20:31,402 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:20:31,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 18:20:31,402 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:20:31,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:20:31,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1545272291, now seen corresponding path program 1 times [2021-12-06 18:20:31,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:20:31,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875899000] [2021-12-06 18:20:31,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:31,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:20:31,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:31,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 18:20:31,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:31,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:20:31,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:31,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 18:20:31,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:31,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:31,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:31,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-06 18:20:31,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:31,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-06 18:20:31,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:31,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-06 18:20:31,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:31,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:20:31,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:20:31,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875899000] [2021-12-06 18:20:31,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875899000] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:20:31,478 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:20:31,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 18:20:31,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595742801] [2021-12-06 18:20:31,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:20:31,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 18:20:31,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:20:31,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 18:20:31,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:20:31,479 INFO L87 Difference]: Start difference. First operand 1738 states and 2380 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-06 18:20:32,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:20:32,634 INFO L93 Difference]: Finished difference Result 5310 states and 7254 transitions. [2021-12-06 18:20:32,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-06 18:20:32,635 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 66 [2021-12-06 18:20:32,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:20:32,644 INFO L225 Difference]: With dead ends: 5310 [2021-12-06 18:20:32,644 INFO L226 Difference]: Without dead ends: 2129 [2021-12-06 18:20:32,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2021-12-06 18:20:32,651 INFO L933 BasicCegarLoop]: 761 mSDtfsCounter, 3475 mSDsluCounter, 2175 mSDsCounter, 0 mSdLazyCounter, 1678 mSolverCounterSat, 677 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3497 SdHoareTripleChecker+Valid, 2936 SdHoareTripleChecker+Invalid, 2355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 677 IncrementalHoareTripleChecker+Valid, 1678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 18:20:32,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3497 Valid, 2936 Invalid, 2355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [677 Valid, 1678 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 18:20:32,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2129 states. [2021-12-06 18:20:32,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2129 to 1949. [2021-12-06 18:20:32,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1949 states, 1564 states have (on average 1.350383631713555) internal successors, (2112), 1590 states have internal predecessors, (2112), 217 states have call successors, (217), 140 states have call predecessors, (217), 166 states have return successors, (263), 221 states have call predecessors, (263), 213 states have call successors, (263) [2021-12-06 18:20:32,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1949 states to 1949 states and 2592 transitions. [2021-12-06 18:20:32,738 INFO L78 Accepts]: Start accepts. Automaton has 1949 states and 2592 transitions. Word has length 66 [2021-12-06 18:20:32,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:20:32,739 INFO L470 AbstractCegarLoop]: Abstraction has 1949 states and 2592 transitions. [2021-12-06 18:20:32,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-06 18:20:32,739 INFO L276 IsEmpty]: Start isEmpty. Operand 1949 states and 2592 transitions. [2021-12-06 18:20:32,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-06 18:20:32,741 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:20:32,742 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2021-12-06 18:20:32,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 18:20:32,742 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:20:32,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:20:32,743 INFO L85 PathProgramCache]: Analyzing trace with hash 428939397, now seen corresponding path program 1 times [2021-12-06 18:20:32,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:20:32,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424116291] [2021-12-06 18:20:32,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:32,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:20:32,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:32,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 18:20:32,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:32,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:20:32,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:32,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 18:20:32,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:32,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:32,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:32,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-06 18:20:32,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:32,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-06 18:20:32,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:32,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-06 18:20:32,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:32,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-06 18:20:32,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:32,851 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-06 18:20:32,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:20:32,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424116291] [2021-12-06 18:20:32,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424116291] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:20:32,852 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:20:32,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-06 18:20:32,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136225909] [2021-12-06 18:20:32,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:20:32,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 18:20:32,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:20:32,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 18:20:32,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-06 18:20:32,853 INFO L87 Difference]: Start difference. First operand 1949 states and 2592 transitions. Second operand has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 18:20:33,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:20:33,455 INFO L93 Difference]: Finished difference Result 3774 states and 4994 transitions. [2021-12-06 18:20:33,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 18:20:33,455 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 91 [2021-12-06 18:20:33,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:20:33,468 INFO L225 Difference]: With dead ends: 3774 [2021-12-06 18:20:33,468 INFO L226 Difference]: Without dead ends: 2143 [2021-12-06 18:20:33,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-12-06 18:20:33,473 INFO L933 BasicCegarLoop]: 615 mSDtfsCounter, 541 mSDsluCounter, 2316 mSDsCounter, 0 mSdLazyCounter, 1283 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 543 SdHoareTripleChecker+Valid, 2931 SdHoareTripleChecker+Invalid, 1382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 18:20:33,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [543 Valid, 2931 Invalid, 1382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1283 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 18:20:33,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2143 states. [2021-12-06 18:20:33,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2143 to 2009. [2021-12-06 18:20:33,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2009 states, 1612 states have (on average 1.336228287841191) internal successors, (2154), 1638 states have internal predecessors, (2154), 217 states have call successors, (217), 140 states have call predecessors, (217), 178 states have return successors, (275), 233 states have call predecessors, (275), 213 states have call successors, (275) [2021-12-06 18:20:33,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2009 states to 2009 states and 2646 transitions. [2021-12-06 18:20:33,572 INFO L78 Accepts]: Start accepts. Automaton has 2009 states and 2646 transitions. Word has length 91 [2021-12-06 18:20:33,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:20:33,572 INFO L470 AbstractCegarLoop]: Abstraction has 2009 states and 2646 transitions. [2021-12-06 18:20:33,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 18:20:33,573 INFO L276 IsEmpty]: Start isEmpty. Operand 2009 states and 2646 transitions. [2021-12-06 18:20:33,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-06 18:20:33,574 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:20:33,574 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2021-12-06 18:20:33,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 18:20:33,574 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:20:33,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:20:33,575 INFO L85 PathProgramCache]: Analyzing trace with hash 872840071, now seen corresponding path program 1 times [2021-12-06 18:20:33,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:20:33,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092712158] [2021-12-06 18:20:33,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:33,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:20:33,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:33,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 18:20:33,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:33,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:20:33,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:33,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 18:20:33,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:33,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:33,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:33,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-06 18:20:33,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:33,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-06 18:20:33,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:33,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-06 18:20:33,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:33,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-06 18:20:33,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:33,642 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 18:20:33,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:20:33,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092712158] [2021-12-06 18:20:33,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092712158] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:20:33,643 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:20:33,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 18:20:33,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676768275] [2021-12-06 18:20:33,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:20:33,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 18:20:33,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:20:33,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 18:20:33,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:20:33,645 INFO L87 Difference]: Start difference. First operand 2009 states and 2646 transitions. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 4 states have internal predecessors, (70), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-06 18:20:34,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:20:34,017 INFO L93 Difference]: Finished difference Result 5606 states and 7354 transitions. [2021-12-06 18:20:34,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 18:20:34,018 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 4 states have internal predecessors, (70), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 91 [2021-12-06 18:20:34,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:20:34,034 INFO L225 Difference]: With dead ends: 5606 [2021-12-06 18:20:34,035 INFO L226 Difference]: Without dead ends: 3916 [2021-12-06 18:20:34,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-12-06 18:20:34,039 INFO L933 BasicCegarLoop]: 624 mSDtfsCounter, 1169 mSDsluCounter, 1226 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1199 SdHoareTripleChecker+Valid, 1850 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:20:34,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1199 Valid, 1850 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 18:20:34,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3916 states. [2021-12-06 18:20:34,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3916 to 3696. [2021-12-06 18:20:34,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3696 states, 2926 states have (on average 1.2956254272043746) internal successors, (3791), 2986 states have internal predecessors, (3791), 406 states have call successors, (406), 272 states have call predecessors, (406), 362 states have return successors, (607), 442 states have call predecessors, (607), 402 states have call successors, (607) [2021-12-06 18:20:34,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3696 states to 3696 states and 4804 transitions. [2021-12-06 18:20:34,196 INFO L78 Accepts]: Start accepts. Automaton has 3696 states and 4804 transitions. Word has length 91 [2021-12-06 18:20:34,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:20:34,197 INFO L470 AbstractCegarLoop]: Abstraction has 3696 states and 4804 transitions. [2021-12-06 18:20:34,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 4 states have internal predecessors, (70), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-06 18:20:34,197 INFO L276 IsEmpty]: Start isEmpty. Operand 3696 states and 4804 transitions. [2021-12-06 18:20:34,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-06 18:20:34,200 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:20:34,200 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2021-12-06 18:20:34,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 18:20:34,200 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:20:34,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:20:34,201 INFO L85 PathProgramCache]: Analyzing trace with hash -184998007, now seen corresponding path program 1 times [2021-12-06 18:20:34,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:20:34,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077204937] [2021-12-06 18:20:34,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:34,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:20:34,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:34,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 18:20:34,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:34,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:20:34,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:34,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 18:20:34,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:34,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:34,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:34,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-06 18:20:34,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:34,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-06 18:20:34,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:34,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-06 18:20:34,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:34,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-06 18:20:34,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:34,260 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-06 18:20:34,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:20:34,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077204937] [2021-12-06 18:20:34,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077204937] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:20:34,261 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:20:34,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 18:20:34,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402241321] [2021-12-06 18:20:34,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:20:34,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:20:34,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:20:34,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:20:34,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:20:34,262 INFO L87 Difference]: Start difference. First operand 3696 states and 4804 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-06 18:20:34,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:20:34,610 INFO L93 Difference]: Finished difference Result 5504 states and 7072 transitions. [2021-12-06 18:20:34,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 18:20:34,610 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 91 [2021-12-06 18:20:34,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:20:34,619 INFO L225 Difference]: With dead ends: 5504 [2021-12-06 18:20:34,619 INFO L226 Difference]: Without dead ends: 2127 [2021-12-06 18:20:34,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-06 18:20:34,624 INFO L933 BasicCegarLoop]: 615 mSDtfsCounter, 657 mSDsluCounter, 1120 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 672 SdHoareTripleChecker+Valid, 1735 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:20:34,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [672 Valid, 1735 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 18:20:34,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2127 states. [2021-12-06 18:20:34,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2127 to 2009. [2021-12-06 18:20:34,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2009 states, 1612 states have (on average 1.3095533498759304) internal successors, (2111), 1638 states have internal predecessors, (2111), 217 states have call successors, (217), 140 states have call predecessors, (217), 178 states have return successors, (275), 233 states have call predecessors, (275), 213 states have call successors, (275) [2021-12-06 18:20:34,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2009 states to 2009 states and 2603 transitions. [2021-12-06 18:20:34,696 INFO L78 Accepts]: Start accepts. Automaton has 2009 states and 2603 transitions. Word has length 91 [2021-12-06 18:20:34,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:20:34,696 INFO L470 AbstractCegarLoop]: Abstraction has 2009 states and 2603 transitions. [2021-12-06 18:20:34,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-06 18:20:34,696 INFO L276 IsEmpty]: Start isEmpty. Operand 2009 states and 2603 transitions. [2021-12-06 18:20:34,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-06 18:20:34,698 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:20:34,698 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-12-06 18:20:34,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-06 18:20:34,698 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:20:34,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:20:34,698 INFO L85 PathProgramCache]: Analyzing trace with hash -828087601, now seen corresponding path program 1 times [2021-12-06 18:20:34,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:20:34,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521452784] [2021-12-06 18:20:34,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:34,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:20:34,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:34,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 18:20:34,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:34,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 18:20:34,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:34,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 18:20:34,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:34,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 18:20:34,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:34,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-06 18:20:34,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:34,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-06 18:20:34,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:34,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-06 18:20:34,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:34,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-06 18:20:34,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:34,779 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 18:20:34,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:20:34,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521452784] [2021-12-06 18:20:34,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521452784] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:20:34,779 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:20:34,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-06 18:20:34,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521389536] [2021-12-06 18:20:34,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:20:34,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 18:20:34,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:20:34,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 18:20:34,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-06 18:20:34,781 INFO L87 Difference]: Start difference. First operand 2009 states and 2603 transitions. Second operand has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-06 18:20:35,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:20:35,683 INFO L93 Difference]: Finished difference Result 4665 states and 5993 transitions. [2021-12-06 18:20:35,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-06 18:20:35,683 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 92 [2021-12-06 18:20:35,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:20:35,694 INFO L225 Difference]: With dead ends: 4665 [2021-12-06 18:20:35,695 INFO L226 Difference]: Without dead ends: 2823 [2021-12-06 18:20:35,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=720, Unknown=0, NotChecked=0, Total=930 [2021-12-06 18:20:35,699 INFO L933 BasicCegarLoop]: 682 mSDtfsCounter, 2620 mSDsluCounter, 1308 mSDsCounter, 0 mSdLazyCounter, 1222 mSolverCounterSat, 555 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2662 SdHoareTripleChecker+Valid, 1990 SdHoareTripleChecker+Invalid, 1777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 555 IncrementalHoareTripleChecker+Valid, 1222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:20:35,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2662 Valid, 1990 Invalid, 1777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [555 Valid, 1222 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 18:20:35,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2823 states. [2021-12-06 18:20:35,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2823 to 2646. [2021-12-06 18:20:35,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2646 states, 2090 states have (on average 1.2708133971291866) internal successors, (2656), 2125 states have internal predecessors, (2656), 296 states have call successors, (296), 189 states have call predecessors, (296), 258 states have return successors, (411), 334 states have call predecessors, (411), 292 states have call successors, (411) [2021-12-06 18:20:35,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2646 states to 2646 states and 3363 transitions. [2021-12-06 18:20:35,826 INFO L78 Accepts]: Start accepts. Automaton has 2646 states and 3363 transitions. Word has length 92 [2021-12-06 18:20:35,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:20:35,826 INFO L470 AbstractCegarLoop]: Abstraction has 2646 states and 3363 transitions. [2021-12-06 18:20:35,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-06 18:20:35,827 INFO L276 IsEmpty]: Start isEmpty. Operand 2646 states and 3363 transitions. [2021-12-06 18:20:35,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-06 18:20:35,829 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:20:35,829 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:20:35,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-06 18:20:35,829 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:20:35,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:20:35,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1167702267, now seen corresponding path program 1 times [2021-12-06 18:20:35,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:20:35,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174137659] [2021-12-06 18:20:35,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:35,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:20:35,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:35,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 18:20:35,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:35,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 18:20:35,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:35,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 18:20:35,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:35,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-06 18:20:35,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:35,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-06 18:20:35,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:35,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:20:35,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:20:35,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174137659] [2021-12-06 18:20:35,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174137659] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:20:35,913 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:20:35,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:20:35,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940856425] [2021-12-06 18:20:35,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:20:35,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:20:35,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:20:35,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:20:35,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:20:35,914 INFO L87 Difference]: Start difference. First operand 2646 states and 3363 transitions. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 3 states have internal predecessors, (135), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 18:20:36,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:20:36,836 INFO L93 Difference]: Finished difference Result 3051 states and 4013 transitions. [2021-12-06 18:20:36,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 18:20:36,837 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 3 states have internal predecessors, (135), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 146 [2021-12-06 18:20:36,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:20:36,847 INFO L225 Difference]: With dead ends: 3051 [2021-12-06 18:20:36,847 INFO L226 Difference]: Without dead ends: 2755 [2021-12-06 18:20:36,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-06 18:20:36,849 INFO L933 BasicCegarLoop]: 673 mSDtfsCounter, 922 mSDsluCounter, 554 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 943 SdHoareTripleChecker+Valid, 1227 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 18:20:36,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [943 Valid, 1227 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 18:20:36,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2755 states. [2021-12-06 18:20:36,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2755 to 2646. [2021-12-06 18:20:36,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2646 states, 2090 states have (on average 1.270334928229665) internal successors, (2655), 2125 states have internal predecessors, (2655), 296 states have call successors, (296), 189 states have call predecessors, (296), 258 states have return successors, (411), 334 states have call predecessors, (411), 292 states have call successors, (411) [2021-12-06 18:20:37,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2646 states to 2646 states and 3362 transitions. [2021-12-06 18:20:37,008 INFO L78 Accepts]: Start accepts. Automaton has 2646 states and 3362 transitions. Word has length 146 [2021-12-06 18:20:37,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:20:37,009 INFO L470 AbstractCegarLoop]: Abstraction has 2646 states and 3362 transitions. [2021-12-06 18:20:37,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 3 states have internal predecessors, (135), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 18:20:37,009 INFO L276 IsEmpty]: Start isEmpty. Operand 2646 states and 3362 transitions. [2021-12-06 18:20:37,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-06 18:20:37,012 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:20:37,012 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:20:37,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-06 18:20:37,012 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:20:37,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:20:37,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1712574841, now seen corresponding path program 1 times [2021-12-06 18:20:37,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:20:37,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730384626] [2021-12-06 18:20:37,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:37,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:20:37,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:37,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 18:20:37,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:37,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 18:20:37,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:37,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 18:20:37,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:37,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-06 18:20:37,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:37,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-06 18:20:37,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:37,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:20:37,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:20:37,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730384626] [2021-12-06 18:20:37,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730384626] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:20:37,113 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:20:37,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 18:20:37,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526344318] [2021-12-06 18:20:37,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:20:37,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:20:37,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:20:37,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:20:37,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:20:37,115 INFO L87 Difference]: Start difference. First operand 2646 states and 3362 transitions. Second operand has 6 states, 6 states have (on average 22.5) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 18:20:38,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:20:38,840 INFO L93 Difference]: Finished difference Result 3460 states and 4673 transitions. [2021-12-06 18:20:38,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 18:20:38,840 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.5) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 146 [2021-12-06 18:20:38,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:20:38,852 INFO L225 Difference]: With dead ends: 3460 [2021-12-06 18:20:38,852 INFO L226 Difference]: Without dead ends: 3168 [2021-12-06 18:20:38,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-06 18:20:38,854 INFO L933 BasicCegarLoop]: 740 mSDtfsCounter, 1462 mSDsluCounter, 1105 mSDsCounter, 0 mSdLazyCounter, 1689 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1490 SdHoareTripleChecker+Valid, 1845 SdHoareTripleChecker+Invalid, 1841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 1689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:20:38,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1490 Valid, 1845 Invalid, 1841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 1689 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-06 18:20:38,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3168 states. [2021-12-06 18:20:39,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3168 to 2949. [2021-12-06 18:20:39,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2949 states, 2368 states have (on average 1.308277027027027) internal successors, (3098), 2404 states have internal predecessors, (3098), 314 states have call successors, (314), 195 states have call predecessors, (314), 265 states have return successors, (432), 352 states have call predecessors, (432), 310 states have call successors, (432) [2021-12-06 18:20:39,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2949 states to 2949 states and 3844 transitions. [2021-12-06 18:20:39,020 INFO L78 Accepts]: Start accepts. Automaton has 2949 states and 3844 transitions. Word has length 146 [2021-12-06 18:20:39,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:20:39,021 INFO L470 AbstractCegarLoop]: Abstraction has 2949 states and 3844 transitions. [2021-12-06 18:20:39,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.5) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 18:20:39,021 INFO L276 IsEmpty]: Start isEmpty. Operand 2949 states and 3844 transitions. [2021-12-06 18:20:39,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-06 18:20:39,024 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:20:39,024 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:20:39,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-06 18:20:39,024 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:20:39,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:20:39,025 INFO L85 PathProgramCache]: Analyzing trace with hash -88890763, now seen corresponding path program 1 times [2021-12-06 18:20:39,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:20:39,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546627685] [2021-12-06 18:20:39,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:39,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:20:39,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:39,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 18:20:39,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:39,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 18:20:39,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:39,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 18:20:39,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:39,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-06 18:20:39,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:39,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-06 18:20:39,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:39,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:20:39,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:20:39,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546627685] [2021-12-06 18:20:39,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546627685] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:20:39,134 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:20:39,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 18:20:39,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041921817] [2021-12-06 18:20:39,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:20:39,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 18:20:39,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:20:39,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 18:20:39,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:20:39,136 INFO L87 Difference]: Start difference. First operand 2949 states and 3844 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 18:20:41,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:20:41,079 INFO L93 Difference]: Finished difference Result 4188 states and 5840 transitions. [2021-12-06 18:20:41,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 18:20:41,080 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 146 [2021-12-06 18:20:41,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:20:41,094 INFO L225 Difference]: With dead ends: 4188 [2021-12-06 18:20:41,094 INFO L226 Difference]: Without dead ends: 3593 [2021-12-06 18:20:41,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-06 18:20:41,097 INFO L933 BasicCegarLoop]: 948 mSDtfsCounter, 1477 mSDsluCounter, 1869 mSDsCounter, 0 mSdLazyCounter, 2614 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1505 SdHoareTripleChecker+Valid, 2817 SdHoareTripleChecker+Invalid, 2727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 2614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:20:41,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1505 Valid, 2817 Invalid, 2727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 2614 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-06 18:20:41,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3593 states. [2021-12-06 18:20:41,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3593 to 3231. [2021-12-06 18:20:41,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3231 states, 2625 states have (on average 1.3329523809523809) internal successors, (3499), 2662 states have internal predecessors, (3499), 332 states have call successors, (332), 201 states have call predecessors, (332), 272 states have return successors, (452), 371 states have call predecessors, (452), 328 states have call successors, (452) [2021-12-06 18:20:41,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3231 states to 3231 states and 4283 transitions. [2021-12-06 18:20:41,256 INFO L78 Accepts]: Start accepts. Automaton has 3231 states and 4283 transitions. Word has length 146 [2021-12-06 18:20:41,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:20:41,257 INFO L470 AbstractCegarLoop]: Abstraction has 3231 states and 4283 transitions. [2021-12-06 18:20:41,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 18:20:41,257 INFO L276 IsEmpty]: Start isEmpty. Operand 3231 states and 4283 transitions. [2021-12-06 18:20:41,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-06 18:20:41,259 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:20:41,259 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:20:41,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-06 18:20:41,260 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:20:41,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:20:41,260 INFO L85 PathProgramCache]: Analyzing trace with hash -795487369, now seen corresponding path program 1 times [2021-12-06 18:20:41,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:20:41,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671354763] [2021-12-06 18:20:41,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:41,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:20:41,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:41,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 18:20:41,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:41,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 18:20:41,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:41,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 18:20:41,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:41,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-06 18:20:41,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:41,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-06 18:20:41,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:41,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:20:41,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:20:41,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671354763] [2021-12-06 18:20:41,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671354763] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:20:41,374 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:20:41,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 18:20:41,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220850324] [2021-12-06 18:20:41,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:20:41,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 18:20:41,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:20:41,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 18:20:41,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:20:41,375 INFO L87 Difference]: Start difference. First operand 3231 states and 4283 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 18:20:43,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:20:43,313 INFO L93 Difference]: Finished difference Result 5261 states and 7547 transitions. [2021-12-06 18:20:43,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 18:20:43,314 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 146 [2021-12-06 18:20:43,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:20:43,327 INFO L225 Difference]: With dead ends: 5261 [2021-12-06 18:20:43,327 INFO L226 Difference]: Without dead ends: 4384 [2021-12-06 18:20:43,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-06 18:20:43,331 INFO L933 BasicCegarLoop]: 940 mSDtfsCounter, 1474 mSDsluCounter, 1865 mSDsCounter, 0 mSdLazyCounter, 2620 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1502 SdHoareTripleChecker+Valid, 2805 SdHoareTripleChecker+Invalid, 2736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 2620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-06 18:20:43,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1502 Valid, 2805 Invalid, 2736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 2620 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-06 18:20:43,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4384 states. [2021-12-06 18:20:43,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4384 to 3796. [2021-12-06 18:20:43,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3796 states, 3140 states have (on average 1.370063694267516) internal successors, (4302), 3179 states have internal predecessors, (4302), 368 states have call successors, (368), 213 states have call predecessors, (368), 286 states have return successors, (496), 409 states have call predecessors, (496), 364 states have call successors, (496) [2021-12-06 18:20:43,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3796 states to 3796 states and 5166 transitions. [2021-12-06 18:20:43,528 INFO L78 Accepts]: Start accepts. Automaton has 3796 states and 5166 transitions. Word has length 146 [2021-12-06 18:20:43,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:20:43,528 INFO L470 AbstractCegarLoop]: Abstraction has 3796 states and 5166 transitions. [2021-12-06 18:20:43,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 18:20:43,528 INFO L276 IsEmpty]: Start isEmpty. Operand 3796 states and 5166 transitions. [2021-12-06 18:20:43,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-06 18:20:43,530 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:20:43,530 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:20:43,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-06 18:20:43,530 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:20:43,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:20:43,531 INFO L85 PathProgramCache]: Analyzing trace with hash 151550517, now seen corresponding path program 1 times [2021-12-06 18:20:43,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:20:43,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125149671] [2021-12-06 18:20:43,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:43,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:20:43,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:43,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 18:20:43,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:43,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 18:20:43,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:43,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 18:20:43,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:43,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-06 18:20:43,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:43,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-06 18:20:43,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:43,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:20:43,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:20:43,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125149671] [2021-12-06 18:20:43,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125149671] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:20:43,619 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:20:43,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 18:20:43,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412293235] [2021-12-06 18:20:43,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:20:43,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 18:20:43,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:20:43,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 18:20:43,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:20:43,621 INFO L87 Difference]: Start difference. First operand 3796 states and 5166 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 18:20:45,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:20:45,696 INFO L93 Difference]: Finished difference Result 7326 states and 10814 transitions. [2021-12-06 18:20:45,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 18:20:45,697 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 146 [2021-12-06 18:20:45,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:20:45,712 INFO L225 Difference]: With dead ends: 7326 [2021-12-06 18:20:45,712 INFO L226 Difference]: Without dead ends: 5884 [2021-12-06 18:20:45,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-06 18:20:45,716 INFO L933 BasicCegarLoop]: 936 mSDtfsCounter, 1470 mSDsluCounter, 1865 mSDsCounter, 0 mSdLazyCounter, 2615 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1498 SdHoareTripleChecker+Valid, 2801 SdHoareTripleChecker+Invalid, 2731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 2615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:20:45,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1498 Valid, 2801 Invalid, 2731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 2615 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-06 18:20:45,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5884 states. [2021-12-06 18:20:45,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5884 to 4927. [2021-12-06 18:20:45,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4927 states, 4171 states have (on average 1.416446895228962) internal successors, (5908), 4214 states have internal predecessors, (5908), 440 states have call successors, (440), 237 states have call predecessors, (440), 314 states have return successors, (590), 485 states have call predecessors, (590), 436 states have call successors, (590) [2021-12-06 18:20:46,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4927 states to 4927 states and 6938 transitions. [2021-12-06 18:20:46,001 INFO L78 Accepts]: Start accepts. Automaton has 4927 states and 6938 transitions. Word has length 146 [2021-12-06 18:20:46,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:20:46,001 INFO L470 AbstractCegarLoop]: Abstraction has 4927 states and 6938 transitions. [2021-12-06 18:20:46,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 18:20:46,002 INFO L276 IsEmpty]: Start isEmpty. Operand 4927 states and 6938 transitions. [2021-12-06 18:20:46,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-06 18:20:46,004 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:20:46,004 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:20:46,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-06 18:20:46,005 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:20:46,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:20:46,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1013384119, now seen corresponding path program 1 times [2021-12-06 18:20:46,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:20:46,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274147492] [2021-12-06 18:20:46,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:46,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:20:46,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:46,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 18:20:46,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:46,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 18:20:46,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:46,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 18:20:46,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:46,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-06 18:20:46,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:46,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-06 18:20:46,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:46,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:20:46,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:20:46,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274147492] [2021-12-06 18:20:46,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274147492] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:20:46,091 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:20:46,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 18:20:46,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418611646] [2021-12-06 18:20:46,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:20:46,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 18:20:46,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:20:46,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 18:20:46,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:20:46,092 INFO L87 Difference]: Start difference. First operand 4927 states and 6938 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 18:20:48,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:20:48,357 INFO L93 Difference]: Finished difference Result 11455 states and 17364 transitions. [2021-12-06 18:20:48,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 18:20:48,358 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 146 [2021-12-06 18:20:48,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:20:48,376 INFO L225 Difference]: With dead ends: 11455 [2021-12-06 18:20:48,376 INFO L226 Difference]: Without dead ends: 8882 [2021-12-06 18:20:48,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-06 18:20:48,382 INFO L933 BasicCegarLoop]: 932 mSDtfsCounter, 1466 mSDsluCounter, 1865 mSDsCounter, 0 mSdLazyCounter, 2610 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1494 SdHoareTripleChecker+Valid, 2797 SdHoareTripleChecker+Invalid, 2726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 2610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:20:48,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1494 Valid, 2797 Invalid, 2726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 2610 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-06 18:20:48,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8882 states. [2021-12-06 18:20:48,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8882 to 7194. [2021-12-06 18:20:48,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7194 states, 6238 states have (on average 1.462968900288554) internal successors, (9126), 6289 states have internal predecessors, (9126), 584 states have call successors, (584), 285 states have call predecessors, (584), 370 states have return successors, (796), 637 states have call predecessors, (796), 580 states have call successors, (796) [2021-12-06 18:20:48,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7194 states to 7194 states and 10506 transitions. [2021-12-06 18:20:48,808 INFO L78 Accepts]: Start accepts. Automaton has 7194 states and 10506 transitions. Word has length 146 [2021-12-06 18:20:48,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:20:48,808 INFO L470 AbstractCegarLoop]: Abstraction has 7194 states and 10506 transitions. [2021-12-06 18:20:48,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 18:20:48,808 INFO L276 IsEmpty]: Start isEmpty. Operand 7194 states and 10506 transitions. [2021-12-06 18:20:48,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-06 18:20:48,811 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:20:48,812 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:20:48,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-06 18:20:48,812 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:20:48,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:20:48,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1037024779, now seen corresponding path program 1 times [2021-12-06 18:20:48,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:20:48,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909293829] [2021-12-06 18:20:48,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:48,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:20:48,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:48,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 18:20:48,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:48,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 18:20:48,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:48,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 18:20:48,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:48,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-06 18:20:48,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:48,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-06 18:20:48,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:48,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:20:48,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:20:48,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909293829] [2021-12-06 18:20:48,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909293829] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:20:48,904 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:20:48,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 18:20:48,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696906542] [2021-12-06 18:20:48,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:20:48,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 18:20:48,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:20:48,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 18:20:48,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:20:48,906 INFO L87 Difference]: Start difference. First operand 7194 states and 10506 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 18:20:51,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:20:51,533 INFO L93 Difference]: Finished difference Result 19712 states and 30522 transitions. [2021-12-06 18:20:51,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 18:20:51,533 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 146 [2021-12-06 18:20:51,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:20:51,563 INFO L225 Difference]: With dead ends: 19712 [2021-12-06 18:20:51,563 INFO L226 Difference]: Without dead ends: 14872 [2021-12-06 18:20:51,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-06 18:20:51,576 INFO L933 BasicCegarLoop]: 928 mSDtfsCounter, 1462 mSDsluCounter, 1865 mSDsCounter, 0 mSdLazyCounter, 2605 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1490 SdHoareTripleChecker+Valid, 2793 SdHoareTripleChecker+Invalid, 2721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 2605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-06 18:20:51,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1490 Valid, 2793 Invalid, 2721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 2605 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-06 18:20:51,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14872 states. [2021-12-06 18:20:52,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14872 to 11741. [2021-12-06 18:20:52,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11741 states, 10385 states have (on average 1.5002407318247473) internal successors, (15580), 10452 states have internal predecessors, (15580), 872 states have call successors, (872), 381 states have call predecessors, (872), 482 states have return successors, (1262), 941 states have call predecessors, (1262), 868 states have call successors, (1262) [2021-12-06 18:20:52,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11741 states to 11741 states and 17714 transitions. [2021-12-06 18:20:52,225 INFO L78 Accepts]: Start accepts. Automaton has 11741 states and 17714 transitions. Word has length 146 [2021-12-06 18:20:52,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:20:52,225 INFO L470 AbstractCegarLoop]: Abstraction has 11741 states and 17714 transitions. [2021-12-06 18:20:52,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 18:20:52,225 INFO L276 IsEmpty]: Start isEmpty. Operand 11741 states and 17714 transitions. [2021-12-06 18:20:52,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-06 18:20:52,232 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:20:52,232 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:20:52,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-06 18:20:52,233 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:20:52,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:20:52,233 INFO L85 PathProgramCache]: Analyzing trace with hash -548977673, now seen corresponding path program 1 times [2021-12-06 18:20:52,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:20:52,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787359660] [2021-12-06 18:20:52,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:52,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:20:52,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:52,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 18:20:52,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:52,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 18:20:52,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:52,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 18:20:52,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:52,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-06 18:20:52,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:52,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-06 18:20:52,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:52,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:20:52,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:20:52,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787359660] [2021-12-06 18:20:52,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787359660] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:20:52,328 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:20:52,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 18:20:52,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471783694] [2021-12-06 18:20:52,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:20:52,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 18:20:52,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:20:52,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 18:20:52,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:20:52,329 INFO L87 Difference]: Start difference. First operand 11741 states and 17714 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 18:20:54,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:20:54,185 INFO L93 Difference]: Finished difference Result 24440 states and 38299 transitions. [2021-12-06 18:20:54,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 18:20:54,186 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 146 [2021-12-06 18:20:54,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:20:54,217 INFO L225 Difference]: With dead ends: 24440 [2021-12-06 18:20:54,217 INFO L226 Difference]: Without dead ends: 15053 [2021-12-06 18:20:54,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-06 18:20:54,237 INFO L933 BasicCegarLoop]: 633 mSDtfsCounter, 1317 mSDsluCounter, 792 mSDsCounter, 0 mSdLazyCounter, 1147 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1346 SdHoareTripleChecker+Valid, 1425 SdHoareTripleChecker+Invalid, 1313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 1147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 18:20:54,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1346 Valid, 1425 Invalid, 1313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 1147 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-06 18:20:54,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15053 states. [2021-12-06 18:20:54,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15053 to 11741. [2021-12-06 18:20:54,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11741 states, 10385 states have (on average 1.4970630717380837) internal successors, (15547), 10452 states have internal predecessors, (15547), 872 states have call successors, (872), 381 states have call predecessors, (872), 482 states have return successors, (1262), 941 states have call predecessors, (1262), 868 states have call successors, (1262) [2021-12-06 18:20:54,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11741 states to 11741 states and 17681 transitions. [2021-12-06 18:20:54,883 INFO L78 Accepts]: Start accepts. Automaton has 11741 states and 17681 transitions. Word has length 146 [2021-12-06 18:20:54,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:20:54,883 INFO L470 AbstractCegarLoop]: Abstraction has 11741 states and 17681 transitions. [2021-12-06 18:20:54,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 18:20:54,883 INFO L276 IsEmpty]: Start isEmpty. Operand 11741 states and 17681 transitions. [2021-12-06 18:20:54,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-06 18:20:54,888 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:20:54,888 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:20:54,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-06 18:20:54,888 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:20:54,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:20:54,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1641612875, now seen corresponding path program 1 times [2021-12-06 18:20:54,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:20:54,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766322835] [2021-12-06 18:20:54,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:54,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:20:54,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:54,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 18:20:54,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:54,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 18:20:54,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:54,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 18:20:54,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:54,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-06 18:20:54,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:54,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-06 18:20:54,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:54,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:20:54,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:20:54,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766322835] [2021-12-06 18:20:54,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766322835] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:20:54,972 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:20:54,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 18:20:54,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450808705] [2021-12-06 18:20:54,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:20:54,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 18:20:54,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:20:54,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 18:20:54,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:20:54,973 INFO L87 Difference]: Start difference. First operand 11741 states and 17681 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 18:20:58,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:20:58,405 INFO L93 Difference]: Finished difference Result 36158 states and 56734 transitions. [2021-12-06 18:20:58,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 18:20:58,406 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 146 [2021-12-06 18:20:58,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:20:58,460 INFO L225 Difference]: With dead ends: 36158 [2021-12-06 18:20:58,460 INFO L226 Difference]: Without dead ends: 26771 [2021-12-06 18:20:58,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-06 18:20:58,478 INFO L933 BasicCegarLoop]: 912 mSDtfsCounter, 1452 mSDsluCounter, 1865 mSDsCounter, 0 mSdLazyCounter, 2564 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1480 SdHoareTripleChecker+Valid, 2777 SdHoareTripleChecker+Invalid, 2684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 2564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-06 18:20:58,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1480 Valid, 2777 Invalid, 2684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 2564 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-06 18:20:58,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26771 states. [2021-12-06 18:20:59,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26771 to 20929. [2021-12-06 18:20:59,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20929 states, 18773 states have (on average 1.521546902466308) internal successors, (28564), 18872 states have internal predecessors, (28564), 1448 states have call successors, (1448), 573 states have call predecessors, (1448), 706 states have return successors, (2356), 1549 states have call predecessors, (2356), 1444 states have call successors, (2356) [2021-12-06 18:20:59,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20929 states to 20929 states and 32368 transitions. [2021-12-06 18:20:59,742 INFO L78 Accepts]: Start accepts. Automaton has 20929 states and 32368 transitions. Word has length 146 [2021-12-06 18:20:59,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:20:59,742 INFO L470 AbstractCegarLoop]: Abstraction has 20929 states and 32368 transitions. [2021-12-06 18:20:59,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 18:20:59,742 INFO L276 IsEmpty]: Start isEmpty. Operand 20929 states and 32368 transitions. [2021-12-06 18:20:59,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-06 18:20:59,752 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:20:59,752 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:20:59,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-06 18:20:59,752 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:20:59,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:20:59,753 INFO L85 PathProgramCache]: Analyzing trace with hash 810878707, now seen corresponding path program 1 times [2021-12-06 18:20:59,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:20:59,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069928698] [2021-12-06 18:20:59,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:20:59,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:20:59,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:59,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 18:20:59,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:59,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 18:20:59,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:59,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 18:20:59,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:59,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-06 18:20:59,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:59,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-06 18:20:59,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:20:59,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:20:59,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:20:59,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069928698] [2021-12-06 18:20:59,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069928698] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:20:59,843 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:20:59,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 18:20:59,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918566217] [2021-12-06 18:20:59,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:20:59,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 18:20:59,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:20:59,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 18:20:59,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:20:59,844 INFO L87 Difference]: Start difference. First operand 20929 states and 32368 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 18:21:02,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:21:02,341 INFO L93 Difference]: Finished difference Result 45659 states and 72691 transitions. [2021-12-06 18:21:02,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 18:21:02,341 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 146 [2021-12-06 18:21:02,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:21:02,399 INFO L225 Difference]: With dead ends: 45659 [2021-12-06 18:21:02,399 INFO L226 Difference]: Without dead ends: 27084 [2021-12-06 18:21:02,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-06 18:21:02,431 INFO L933 BasicCegarLoop]: 624 mSDtfsCounter, 1314 mSDsluCounter, 792 mSDsCounter, 0 mSdLazyCounter, 1128 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1343 SdHoareTripleChecker+Valid, 1416 SdHoareTripleChecker+Invalid, 1294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 1128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 18:21:02,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1343 Valid, 1416 Invalid, 1294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 1128 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 18:21:02,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27084 states. [2021-12-06 18:21:03,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27084 to 20929. [2021-12-06 18:21:03,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20929 states, 18773 states have (on average 1.5180844830341447) internal successors, (28499), 18872 states have internal predecessors, (28499), 1448 states have call successors, (1448), 573 states have call predecessors, (1448), 706 states have return successors, (2356), 1549 states have call predecessors, (2356), 1444 states have call successors, (2356) [2021-12-06 18:21:03,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20929 states to 20929 states and 32303 transitions. [2021-12-06 18:21:03,813 INFO L78 Accepts]: Start accepts. Automaton has 20929 states and 32303 transitions. Word has length 146 [2021-12-06 18:21:03,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:21:03,813 INFO L470 AbstractCegarLoop]: Abstraction has 20929 states and 32303 transitions. [2021-12-06 18:21:03,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 18:21:03,813 INFO L276 IsEmpty]: Start isEmpty. Operand 20929 states and 32303 transitions. [2021-12-06 18:21:03,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-06 18:21:03,820 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:21:03,820 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:21:03,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-06 18:21:03,821 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:21:03,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:21:03,821 INFO L85 PathProgramCache]: Analyzing trace with hash -911123979, now seen corresponding path program 1 times [2021-12-06 18:21:03,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:21:03,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461599044] [2021-12-06 18:21:03,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:21:03,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:21:03,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:03,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 18:21:03,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:03,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 18:21:03,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:03,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 18:21:03,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:03,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-06 18:21:03,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:03,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-06 18:21:03,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:03,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:21:03,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:21:03,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461599044] [2021-12-06 18:21:03,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461599044] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:21:03,903 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:21:03,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 18:21:03,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734866997] [2021-12-06 18:21:03,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:21:03,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 18:21:03,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:21:03,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 18:21:03,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:21:03,905 INFO L87 Difference]: Start difference. First operand 20929 states and 32303 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 18:21:10,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:21:10,251 INFO L93 Difference]: Finished difference Result 77760 states and 122891 transitions. [2021-12-06 18:21:10,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 18:21:10,251 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 146 [2021-12-06 18:21:10,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:21:10,414 INFO L225 Difference]: With dead ends: 77760 [2021-12-06 18:21:10,415 INFO L226 Difference]: Without dead ends: 59185 [2021-12-06 18:21:10,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-06 18:21:10,450 INFO L933 BasicCegarLoop]: 1051 mSDtfsCounter, 1537 mSDsluCounter, 1857 mSDsCounter, 0 mSdLazyCounter, 2971 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1564 SdHoareTripleChecker+Valid, 2908 SdHoareTripleChecker+Invalid, 3093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 2971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-06 18:21:10,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1564 Valid, 2908 Invalid, 3093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 2971 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-06 18:21:10,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59185 states. [2021-12-06 18:21:12,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59185 to 39237. [2021-12-06 18:21:12,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39237 states, 35545 states have (on average 1.5330707553805036) internal successors, (54493), 35708 states have internal predecessors, (54493), 2536 states have call successors, (2536), 957 states have call predecessors, (2536), 1154 states have return successors, (4966), 2701 states have call predecessors, (4966), 2532 states have call successors, (4966) [2021-12-06 18:21:12,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39237 states to 39237 states and 61995 transitions. [2021-12-06 18:21:12,922 INFO L78 Accepts]: Start accepts. Automaton has 39237 states and 61995 transitions. Word has length 146 [2021-12-06 18:21:12,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:21:12,922 INFO L470 AbstractCegarLoop]: Abstraction has 39237 states and 61995 transitions. [2021-12-06 18:21:12,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 18:21:12,922 INFO L276 IsEmpty]: Start isEmpty. Operand 39237 states and 61995 transitions. [2021-12-06 18:21:12,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-06 18:21:12,935 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:21:12,935 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:21:12,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-06 18:21:12,935 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:21:12,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:21:12,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1243767117, now seen corresponding path program 1 times [2021-12-06 18:21:12,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:21:12,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10197111] [2021-12-06 18:21:12,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:21:12,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:21:12,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:12,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 18:21:12,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:12,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 18:21:12,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:12,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 18:21:13,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:13,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-06 18:21:13,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:13,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-06 18:21:13,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:13,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:21:13,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:21:13,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10197111] [2021-12-06 18:21:13,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10197111] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:21:13,016 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:21:13,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 18:21:13,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489043627] [2021-12-06 18:21:13,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:21:13,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 18:21:13,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:21:13,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 18:21:13,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:21:13,018 INFO L87 Difference]: Start difference. First operand 39237 states and 61995 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 18:21:23,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:21:23,745 INFO L93 Difference]: Finished difference Result 150342 states and 241189 transitions. [2021-12-06 18:21:23,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 18:21:23,745 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 146 [2021-12-06 18:21:23,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:21:24,063 INFO L225 Difference]: With dead ends: 150342 [2021-12-06 18:21:24,063 INFO L226 Difference]: Without dead ends: 113459 [2021-12-06 18:21:24,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-06 18:21:24,157 INFO L933 BasicCegarLoop]: 893 mSDtfsCounter, 1772 mSDsluCounter, 1854 mSDsCounter, 0 mSdLazyCounter, 2521 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1810 SdHoareTripleChecker+Valid, 2747 SdHoareTripleChecker+Invalid, 2646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 2521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-06 18:21:24,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1810 Valid, 2747 Invalid, 2646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 2521 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-06 18:21:24,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113459 states. [2021-12-06 18:21:29,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113459 to 74506. [2021-12-06 18:21:29,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74506 states, 67806 states have (on average 1.537253340412353) internal successors, (104235), 68097 states have internal predecessors, (104235), 4648 states have call successors, (4648), 1725 states have call predecessors, (4648), 2050 states have return successors, (11580), 4941 states have call predecessors, (11580), 4644 states have call successors, (11580) [2021-12-06 18:21:29,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74506 states to 74506 states and 120463 transitions. [2021-12-06 18:21:29,485 INFO L78 Accepts]: Start accepts. Automaton has 74506 states and 120463 transitions. Word has length 146 [2021-12-06 18:21:29,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:21:29,485 INFO L470 AbstractCegarLoop]: Abstraction has 74506 states and 120463 transitions. [2021-12-06 18:21:29,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 18:21:29,485 INFO L276 IsEmpty]: Start isEmpty. Operand 74506 states and 120463 transitions. [2021-12-06 18:21:29,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-06 18:21:29,509 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:21:29,510 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:21:29,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-06 18:21:29,510 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:21:29,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:21:29,510 INFO L85 PathProgramCache]: Analyzing trace with hash 685165109, now seen corresponding path program 1 times [2021-12-06 18:21:29,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:21:29,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124173945] [2021-12-06 18:21:29,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:21:29,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:21:29,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:29,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 18:21:29,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:29,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 18:21:29,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:29,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 18:21:29,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:29,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-06 18:21:29,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:29,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-06 18:21:29,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:21:29,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:21:29,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:21:29,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124173945] [2021-12-06 18:21:29,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124173945] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:21:29,585 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:21:29,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 18:21:29,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822527463] [2021-12-06 18:21:29,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:21:29,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 18:21:29,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:21:29,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 18:21:29,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:21:29,586 INFO L87 Difference]: Start difference. First operand 74506 states and 120463 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 18:21:49,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:21:49,541 INFO L93 Difference]: Finished difference Result 289297 states and 472799 transitions. [2021-12-06 18:21:49,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 18:21:49,541 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 146 [2021-12-06 18:21:49,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:21:50,246 INFO L225 Difference]: With dead ends: 289297 [2021-12-06 18:21:50,246 INFO L226 Difference]: Without dead ends: 217145 [2021-12-06 18:21:50,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-06 18:21:50,451 INFO L933 BasicCegarLoop]: 1013 mSDtfsCounter, 1515 mSDsluCounter, 1857 mSDsCounter, 0 mSdLazyCounter, 2893 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1542 SdHoareTripleChecker+Valid, 2870 SdHoareTripleChecker+Invalid, 3015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 2893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-06 18:21:50,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1542 Valid, 2870 Invalid, 3015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 2893 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-06 18:21:50,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217145 states. [2021-12-06 18:22:00,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217145 to 146195. [2021-12-06 18:22:00,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146195 states, 133607 states have (on average 1.542950593906008) internal successors, (206149), 134154 states have internal predecessors, (206149), 8744 states have call successors, (8744), 3261 states have call predecessors, (8744), 3842 states have return successors, (29054), 9293 states have call predecessors, (29054), 8740 states have call successors, (29054) [2021-12-06 18:22:01,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146195 states to 146195 states and 243947 transitions. [2021-12-06 18:22:01,423 INFO L78 Accepts]: Start accepts. Automaton has 146195 states and 243947 transitions. Word has length 146 [2021-12-06 18:22:01,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:22:01,424 INFO L470 AbstractCegarLoop]: Abstraction has 146195 states and 243947 transitions. [2021-12-06 18:22:01,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 18:22:01,424 INFO L276 IsEmpty]: Start isEmpty. Operand 146195 states and 243947 transitions. [2021-12-06 18:22:01,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-06 18:22:01,468 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:22:01,468 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:22:01,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-06 18:22:01,468 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:22:01,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:22:01,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1607915917, now seen corresponding path program 1 times [2021-12-06 18:22:01,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:22:01,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000831995] [2021-12-06 18:22:01,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:22:01,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:22:01,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:22:01,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 18:22:01,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:22:01,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 18:22:01,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:22:01,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 18:22:01,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:22:01,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-06 18:22:01,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:22:01,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-06 18:22:01,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:22:01,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:22:01,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:22:01,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000831995] [2021-12-06 18:22:01,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000831995] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:22:01,547 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:22:01,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 18:22:01,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267531496] [2021-12-06 18:22:01,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:22:01,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 18:22:01,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:22:01,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 18:22:01,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:22:01,548 INFO L87 Difference]: Start difference. First operand 146195 states and 243947 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 18:22:40,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:22:40,203 INFO L93 Difference]: Finished difference Result 566056 states and 952621 transitions. [2021-12-06 18:22:40,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 18:22:40,203 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 146 [2021-12-06 18:22:40,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:22:41,838 INFO L225 Difference]: With dead ends: 566056 [2021-12-06 18:22:41,839 INFO L226 Difference]: Without dead ends: 422215 [2021-12-06 18:22:42,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-06 18:22:42,346 INFO L933 BasicCegarLoop]: 884 mSDtfsCounter, 1693 mSDsluCounter, 1857 mSDsCounter, 0 mSdLazyCounter, 2506 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1731 SdHoareTripleChecker+Valid, 2741 SdHoareTripleChecker+Invalid, 2631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 2506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-06 18:22:42,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1731 Valid, 2741 Invalid, 2631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 2506 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-06 18:22:42,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422215 states. [2021-12-06 18:23:03,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422215 to 289316. [2021-12-06 18:23:03,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289316 states, 265208 states have (on average 1.5468273958553287) internal successors, (410231), 266267 states have internal predecessors, (410231), 16680 states have call successors, (16680), 6333 states have call predecessors, (16680), 7426 states have return successors, (76868), 17741 states have call predecessors, (76868), 16676 states have call successors, (76868) [2021-12-06 18:23:04,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289316 states to 289316 states and 503779 transitions. [2021-12-06 18:23:04,908 INFO L78 Accepts]: Start accepts. Automaton has 289316 states and 503779 transitions. Word has length 146 [2021-12-06 18:23:04,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:23:04,908 INFO L470 AbstractCegarLoop]: Abstraction has 289316 states and 503779 transitions. [2021-12-06 18:23:04,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 18:23:04,908 INFO L276 IsEmpty]: Start isEmpty. Operand 289316 states and 503779 transitions. [2021-12-06 18:23:05,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-06 18:23:05,005 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:23:05,005 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:23:05,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-06 18:23:05,006 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:23:05,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:23:05,006 INFO L85 PathProgramCache]: Analyzing trace with hash 119229045, now seen corresponding path program 1 times [2021-12-06 18:23:05,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:23:05,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853726737] [2021-12-06 18:23:05,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:23:05,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:23:05,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:23:05,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 18:23:05,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:23:05,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 18:23:05,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:23:05,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 18:23:05,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:23:05,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-06 18:23:05,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:23:05,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-06 18:23:05,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:23:05,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:23:05,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:23:05,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853726737] [2021-12-06 18:23:05,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853726737] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:23:05,098 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:23:05,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 18:23:05,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243298351] [2021-12-06 18:23:05,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:23:05,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 18:23:05,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:23:05,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 18:23:05,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:23:05,100 INFO L87 Difference]: Start difference. First operand 289316 states and 503779 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 18:24:22,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:24:22,622 INFO L93 Difference]: Finished difference Result 1110103 states and 1949651 transitions. [2021-12-06 18:24:22,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 18:24:22,622 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 146 [2021-12-06 18:24:22,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:24:26,288 INFO L225 Difference]: With dead ends: 1110103 [2021-12-06 18:24:26,288 INFO L226 Difference]: Without dead ends: 823141 [2021-12-06 18:24:27,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-06 18:24:27,335 INFO L933 BasicCegarLoop]: 877 mSDtfsCounter, 1656 mSDsluCounter, 1857 mSDsCounter, 0 mSdLazyCounter, 2495 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1694 SdHoareTripleChecker+Valid, 2734 SdHoareTripleChecker+Invalid, 2623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 2495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:24:27,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1694 Valid, 2734 Invalid, 2623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 2495 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-06 18:24:27,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823141 states. [2021-12-06 18:25:12,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823141 to 575045. [2021-12-06 18:25:13,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575045 states, 528409 states have (on average 1.5497559655494135) internal successors, (818905), 530492 states have internal predecessors, (818905), 32040 states have call successors, (32040), 12477 states have call predecessors, (32040), 14594 states have return successors, (211350), 34125 states have call predecessors, (211350), 32036 states have call successors, (211350) [2021-12-06 18:25:16,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575045 states to 575045 states and 1062295 transitions. [2021-12-06 18:25:16,549 INFO L78 Accepts]: Start accepts. Automaton has 575045 states and 1062295 transitions. Word has length 146 [2021-12-06 18:25:16,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:25:16,550 INFO L470 AbstractCegarLoop]: Abstraction has 575045 states and 1062295 transitions. [2021-12-06 18:25:16,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 18:25:16,550 INFO L276 IsEmpty]: Start isEmpty. Operand 575045 states and 1062295 transitions. [2021-12-06 18:25:16,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-06 18:25:16,836 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:25:16,836 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:25:16,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-06 18:25:16,836 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:25:16,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:25:16,837 INFO L85 PathProgramCache]: Analyzing trace with hash 590585395, now seen corresponding path program 1 times [2021-12-06 18:25:16,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:25:16,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691719042] [2021-12-06 18:25:16,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:25:16,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:25:16,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:16,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 18:25:16,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:16,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 18:25:16,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:16,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 18:25:16,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:16,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-06 18:25:16,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:16,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-06 18:25:16,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:25:16,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:25:16,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:25:16,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691719042] [2021-12-06 18:25:16,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691719042] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:25:16,920 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:25:16,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 18:25:16,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286632123] [2021-12-06 18:25:16,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:25:16,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 18:25:16,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:25:16,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 18:25:16,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:25:16,921 INFO L87 Difference]: Start difference. First operand 575045 states and 1062295 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 18:27:49,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:27:49,855 INFO L93 Difference]: Finished difference Result 2148532 states and 4025909 transitions. [2021-12-06 18:27:49,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 18:27:49,856 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 146 [2021-12-06 18:27:49,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:27:57,982 INFO L225 Difference]: With dead ends: 2148532 [2021-12-06 18:27:57,982 INFO L226 Difference]: Without dead ends: 1575841 [2021-12-06 18:28:01,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-06 18:28:01,084 INFO L933 BasicCegarLoop]: 868 mSDtfsCounter, 1573 mSDsluCounter, 1857 mSDsCounter, 0 mSdLazyCounter, 2477 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1611 SdHoareTripleChecker+Valid, 2725 SdHoareTripleChecker+Invalid, 2605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 2477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-06 18:28:01,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1611 Valid, 2725 Invalid, 2605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 2477 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-06 18:28:01,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1575841 states. [2021-12-06 18:29:39,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1575841 to 1147527. [2021-12-06 18:29:40,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147527 states, 1056859 states have (on average 1.5530671546535535) internal successors, (1641373), 1060990 states have internal predecessors, (1641373), 61736 states have call successors, (61736), 24765 states have call predecessors, (61736), 28930 states have return successors, (597388), 65869 states have call predecessors, (597388), 61732 states have call successors, (597388) [2021-12-06 18:29:48,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147527 states to 1147527 states and 2300497 transitions. [2021-12-06 18:29:49,003 INFO L78 Accepts]: Start accepts. Automaton has 1147527 states and 2300497 transitions. Word has length 146 [2021-12-06 18:29:49,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:29:49,004 INFO L470 AbstractCegarLoop]: Abstraction has 1147527 states and 2300497 transitions. [2021-12-06 18:29:49,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 18:29:49,004 INFO L276 IsEmpty]: Start isEmpty. Operand 1147527 states and 2300497 transitions. [2021-12-06 18:29:49,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-06 18:29:49,417 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:29:49,418 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:29:49,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-06 18:29:49,418 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:29:49,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:29:49,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1540765327, now seen corresponding path program 1 times [2021-12-06 18:29:49,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:29:49,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541957722] [2021-12-06 18:29:49,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:29:49,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:29:49,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:49,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 18:29:49,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:49,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 18:29:49,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:49,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 18:29:49,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:49,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-06 18:29:49,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:49,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-06 18:29:49,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:49,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:29:49,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:29:49,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541957722] [2021-12-06 18:29:49,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541957722] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:29:49,506 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:29:49,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 18:29:49,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160961434] [2021-12-06 18:29:49,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:29:49,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 18:29:49,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:29:49,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 18:29:49,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:29:49,508 INFO L87 Difference]: Start difference. First operand 1147527 states and 2300497 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5)