./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/sep05-1.i --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_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/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_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/reducercommutativity/sep05-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/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_c09c70de-5198-4842-942e-14f0209d70d6/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 ac50477087b7e2b9c80860ad42d4d46d99ddf32e797cee205c21d5ff44f08ec3 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-07 01:23:38,769 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-07 01:23:38,771 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-07 01:23:38,799 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-07 01:23:38,800 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-07 01:23:38,801 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-07 01:23:38,803 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-07 01:23:38,805 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-07 01:23:38,807 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-07 01:23:38,808 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-07 01:23:38,809 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-07 01:23:38,810 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-07 01:23:38,810 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-07 01:23:38,812 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-07 01:23:38,813 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-07 01:23:38,815 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-07 01:23:38,815 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-07 01:23:38,817 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-07 01:23:38,819 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-07 01:23:38,821 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-07 01:23:38,823 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-07 01:23:38,824 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-07 01:23:38,826 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-07 01:23:38,827 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-07 01:23:38,830 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-07 01:23:38,831 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-07 01:23:38,831 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-07 01:23:38,832 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-07 01:23:38,833 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-07 01:23:38,834 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-07 01:23:38,834 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-07 01:23:38,835 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-07 01:23:38,836 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-07 01:23:38,837 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-07 01:23:38,838 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-07 01:23:38,838 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-07 01:23:38,839 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-07 01:23:38,839 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-07 01:23:38,840 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-07 01:23:38,840 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-07 01:23:38,841 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-07 01:23:38,841 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-07 01:23:38,864 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-07 01:23:38,864 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-07 01:23:38,874 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-07 01:23:38,874 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-07 01:23:38,875 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-07 01:23:38,875 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-07 01:23:38,876 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-07 01:23:38,876 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-07 01:23:38,876 INFO L138 SettingsManager]: * Use SBE=true [2021-12-07 01:23:38,876 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-07 01:23:38,876 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-07 01:23:38,876 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-07 01:23:38,877 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-07 01:23:38,877 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-07 01:23:38,877 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-07 01:23:38,877 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-07 01:23:38,877 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-07 01:23:38,878 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-07 01:23:38,878 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-07 01:23:38,878 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-07 01:23:38,878 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-07 01:23:38,878 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-07 01:23:38,878 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-07 01:23:38,879 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-07 01:23:38,879 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 01:23:38,879 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-07 01:23:38,879 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-07 01:23:38,879 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-07 01:23:38,880 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-07 01:23:38,880 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-07 01:23:38,880 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-07 01:23:38,880 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-07 01:23:38,880 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-07 01:23:38,880 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-07 01:23:38,881 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_c09c70de-5198-4842-942e-14f0209d70d6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac50477087b7e2b9c80860ad42d4d46d99ddf32e797cee205c21d5ff44f08ec3 [2021-12-07 01:23:39,055 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-07 01:23:39,075 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-07 01:23:39,077 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-07 01:23:39,078 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-07 01:23:39,079 INFO L275 PluginConnector]: CDTParser initialized [2021-12-07 01:23:39,080 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/reducercommutativity/sep05-1.i [2021-12-07 01:23:39,124 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/data/e98abd4bf/165cae77115a45178cf67af6c6daf7f1/FLAGd00c5b10e [2021-12-07 01:23:39,499 INFO L306 CDTParser]: Found 1 translation units. [2021-12-07 01:23:39,499 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/sv-benchmarks/c/reducercommutativity/sep05-1.i [2021-12-07 01:23:39,503 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/data/e98abd4bf/165cae77115a45178cf67af6c6daf7f1/FLAGd00c5b10e [2021-12-07 01:23:39,513 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/data/e98abd4bf/165cae77115a45178cf67af6c6daf7f1 [2021-12-07 01:23:39,515 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-07 01:23:39,516 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-07 01:23:39,517 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-07 01:23:39,517 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-07 01:23:39,519 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-07 01:23:39,520 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:23:39" (1/1) ... [2021-12-07 01:23:39,521 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41dcef5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:23:39, skipping insertion in model container [2021-12-07 01:23:39,521 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:23:39" (1/1) ... [2021-12-07 01:23:39,526 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-07 01:23:39,537 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-07 01:23:39,681 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_c09c70de-5198-4842-942e-14f0209d70d6/sv-benchmarks/c/reducercommutativity/sep05-1.i[1287,1300] [2021-12-07 01:23:39,683 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 01:23:39,688 INFO L203 MainTranslator]: Completed pre-run [2021-12-07 01:23:39,706 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_c09c70de-5198-4842-942e-14f0209d70d6/sv-benchmarks/c/reducercommutativity/sep05-1.i[1287,1300] [2021-12-07 01:23:39,707 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 01:23:39,716 INFO L208 MainTranslator]: Completed translation [2021-12-07 01:23:39,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:23:39 WrapperNode [2021-12-07 01:23:39,717 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-07 01:23:39,718 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-07 01:23:39,718 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-07 01:23:39,718 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-07 01:23:39,723 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:23:39" (1/1) ... [2021-12-07 01:23:39,729 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:23:39" (1/1) ... [2021-12-07 01:23:39,747 INFO L137 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2021-12-07 01:23:39,747 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-07 01:23:39,748 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-07 01:23:39,748 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-07 01:23:39,748 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-07 01:23:39,754 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:23:39" (1/1) ... [2021-12-07 01:23:39,755 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:23:39" (1/1) ... [2021-12-07 01:23:39,756 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:23:39" (1/1) ... [2021-12-07 01:23:39,757 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:23:39" (1/1) ... [2021-12-07 01:23:39,761 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:23:39" (1/1) ... [2021-12-07 01:23:39,764 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:23:39" (1/1) ... [2021-12-07 01:23:39,765 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:23:39" (1/1) ... [2021-12-07 01:23:39,767 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-07 01:23:39,767 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-07 01:23:39,767 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-07 01:23:39,768 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-07 01:23:39,768 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:23:39" (1/1) ... [2021-12-07 01:23:39,774 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 01:23:39,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:23:39,791 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-07 01:23:39,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-07 01:23:39,819 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-07 01:23:39,820 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-07 01:23:39,820 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-07 01:23:39,820 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-07 01:23:39,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-07 01:23:39,820 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-07 01:23:39,820 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-07 01:23:39,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-07 01:23:39,820 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2021-12-07 01:23:39,820 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2021-12-07 01:23:39,878 INFO L236 CfgBuilder]: Building ICFG [2021-12-07 01:23:39,880 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-07 01:23:39,997 INFO L277 CfgBuilder]: Performing block encoding [2021-12-07 01:23:40,002 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-07 01:23:40,003 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-07 01:23:40,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:23:40 BoogieIcfgContainer [2021-12-07 01:23:40,005 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-07 01:23:40,006 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-07 01:23:40,007 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-07 01:23:40,010 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-07 01:23:40,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 01:23:39" (1/3) ... [2021-12-07 01:23:40,011 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b7dc6bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:23:40, skipping insertion in model container [2021-12-07 01:23:40,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:23:39" (2/3) ... [2021-12-07 01:23:40,011 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b7dc6bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:23:40, skipping insertion in model container [2021-12-07 01:23:40,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:23:40" (3/3) ... [2021-12-07 01:23:40,013 INFO L111 eAbstractionObserver]: Analyzing ICFG sep05-1.i [2021-12-07 01:23:40,018 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-07 01:23:40,018 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-07 01:23:40,064 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-07 01:23:40,072 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 [2021-12-07 01:23:40,072 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-07 01:23:40,088 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:23:40,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-07 01:23:40,093 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:23:40,093 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:23:40,094 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:23:40,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:23:40,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1312709850, now seen corresponding path program 1 times [2021-12-07 01:23:40,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:23:40,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816387308] [2021-12-07 01:23:40,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:40,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:23:40,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:40,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:23:40,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:40,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-07 01:23:40,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:40,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-07 01:23:40,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:40,268 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-07 01:23:40,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:23:40,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816387308] [2021-12-07 01:23:40,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816387308] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:23:40,270 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:23:40,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:23:40,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641177280] [2021-12-07 01:23:40,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:23:40,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:23:40,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:23:40,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:23:40,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:23:40,301 INFO L87 Difference]: Start difference. First operand has 27 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-07 01:23:40,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:23:40,331 INFO L93 Difference]: Finished difference Result 52 states and 73 transitions. [2021-12-07 01:23:40,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:23:40,333 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2021-12-07 01:23:40,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:23:40,340 INFO L225 Difference]: With dead ends: 52 [2021-12-07 01:23:40,340 INFO L226 Difference]: Without dead ends: 25 [2021-12-07 01:23:40,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:23:40,347 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 1 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:23:40,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 58 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:23:40,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-12-07 01:23:40,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-12-07 01:23:40,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:23:40,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2021-12-07 01:23:40,374 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 28 [2021-12-07 01:23:40,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:23:40,374 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2021-12-07 01:23:40,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-07 01:23:40,375 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2021-12-07 01:23:40,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-07 01:23:40,377 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:23:40,377 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:23:40,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-07 01:23:40,378 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:23:40,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:23:40,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1845794557, now seen corresponding path program 1 times [2021-12-07 01:23:40,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:23:40,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281414121] [2021-12-07 01:23:40,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:40,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:23:40,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:40,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-07 01:23:40,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:40,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-07 01:23:40,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:40,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-07 01:23:40,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:40,476 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-07 01:23:40,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:23:40,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281414121] [2021-12-07 01:23:40,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281414121] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:23:40,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477477218] [2021-12-07 01:23:40,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:40,477 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:23:40,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:23:40,478 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:23:40,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-07 01:23:40,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:40,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-07 01:23:40,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:23:40,593 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-07 01:23:40,593 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:23:40,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477477218] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:23:40,593 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:23:40,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-07 01:23:40,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773828763] [2021-12-07 01:23:40,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:23:40,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:23:40,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:23:40,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:23:40,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:23:40,597 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-07 01:23:40,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:23:40,606 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2021-12-07 01:23:40,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:23:40,607 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2021-12-07 01:23:40,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:23:40,608 INFO L225 Difference]: With dead ends: 45 [2021-12-07 01:23:40,608 INFO L226 Difference]: Without dead ends: 27 [2021-12-07 01:23:40,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:23:40,610 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 3 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:23:40,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 50 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:23:40,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-07 01:23:40,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2021-12-07 01:23:40,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:23:40,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2021-12-07 01:23:40,617 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 30 [2021-12-07 01:23:40,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:23:40,617 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2021-12-07 01:23:40,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-07 01:23:40,618 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2021-12-07 01:23:40,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-07 01:23:40,619 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:23:40,619 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:23:40,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-07 01:23:40,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:23:40,821 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:23:40,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:23:40,823 INFO L85 PathProgramCache]: Analyzing trace with hash -701057785, now seen corresponding path program 1 times [2021-12-07 01:23:40,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:23:40,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463972904] [2021-12-07 01:23:40,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:40,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:23:40,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:40,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-07 01:23:40,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:40,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-07 01:23:41,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:41,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-07 01:23:41,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:41,026 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-07 01:23:41,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:23:41,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463972904] [2021-12-07 01:23:41,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463972904] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:23:41,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468469468] [2021-12-07 01:23:41,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:41,027 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:23:41,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:23:41,028 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:23:41,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-07 01:23:41,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:41,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-07 01:23:41,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:23:41,112 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-07 01:23:41,113 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:23:41,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468469468] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:23:41,113 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:23:41,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-07 01:23:41,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332823247] [2021-12-07 01:23:41,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:23:41,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:23:41,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:23:41,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:23:41,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:23:41,115 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-07 01:23:41,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:23:41,125 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2021-12-07 01:23:41,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:23:41,126 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2021-12-07 01:23:41,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:23:41,127 INFO L225 Difference]: With dead ends: 41 [2021-12-07 01:23:41,127 INFO L226 Difference]: Without dead ends: 27 [2021-12-07 01:23:41,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:23:41,129 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 1 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:23:41,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 49 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:23:41,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-07 01:23:41,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2021-12-07 01:23:41,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:23:41,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2021-12-07 01:23:41,133 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 39 [2021-12-07 01:23:41,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:23:41,134 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2021-12-07 01:23:41,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-07 01:23:41,134 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2021-12-07 01:23:41,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-07 01:23:41,135 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:23:41,135 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:23:41,154 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-07 01:23:41,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:23:41,337 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:23:41,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:23:41,338 INFO L85 PathProgramCache]: Analyzing trace with hash -235909079, now seen corresponding path program 1 times [2021-12-07 01:23:41,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:23:41,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001800376] [2021-12-07 01:23:41,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:41,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:23:41,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:41,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-07 01:23:41,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:41,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-07 01:23:41,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:41,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-07 01:23:41,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:41,512 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-07 01:23:41,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:23:41,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001800376] [2021-12-07 01:23:41,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001800376] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:23:41,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82130968] [2021-12-07 01:23:41,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:41,513 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:23:41,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:23:41,514 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:23:41,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-07 01:23:41,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:41,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 01:23:41,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:23:41,623 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-07 01:23:41,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:23:41,682 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-07 01:23:41,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82130968] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:23:41,683 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:23:41,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2021-12-07 01:23:41,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566074683] [2021-12-07 01:23:41,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:23:41,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-07 01:23:41,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:23:41,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-07 01:23:41,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-07 01:23:41,685 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 01:23:41,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:23:41,714 INFO L93 Difference]: Finished difference Result 58 states and 76 transitions. [2021-12-07 01:23:41,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-07 01:23:41,715 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 41 [2021-12-07 01:23:41,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:23:41,716 INFO L225 Difference]: With dead ends: 58 [2021-12-07 01:23:41,716 INFO L226 Difference]: Without dead ends: 37 [2021-12-07 01:23:41,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-07 01:23:41,717 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 12 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:23:41,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 156 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:23:41,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-07 01:23:41,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2021-12-07 01:23:41,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:23:41,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2021-12-07 01:23:41,723 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 41 [2021-12-07 01:23:41,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:23:41,723 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2021-12-07 01:23:41,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 01:23:41,723 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2021-12-07 01:23:41,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-07 01:23:41,725 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:23:41,725 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:23:41,745 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-07 01:23:41,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:23:41,927 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:23:41,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:23:41,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1946429025, now seen corresponding path program 2 times [2021-12-07 01:23:41,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:23:41,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507747480] [2021-12-07 01:23:41,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:41,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:23:42,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:42,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-07 01:23:42,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:42,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-07 01:23:42,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:42,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-07 01:23:42,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:42,111 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-12-07 01:23:42,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:23:42,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507747480] [2021-12-07 01:23:42,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507747480] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:23:42,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005632599] [2021-12-07 01:23:42,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:23:42,112 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:23:42,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:23:42,112 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:23:42,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-07 01:23:42,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 01:23:42,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:23:42,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-07 01:23:42,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:23:42,230 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-12-07 01:23:42,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:23:42,297 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-12-07 01:23:42,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005632599] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:23:42,297 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:23:42,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 9 [2021-12-07 01:23:42,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3544591] [2021-12-07 01:23:42,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:23:42,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-07 01:23:42,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:23:42,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-07 01:23:42,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-07 01:23:42,300 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-07 01:23:42,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:23:42,328 INFO L93 Difference]: Finished difference Result 64 states and 77 transitions. [2021-12-07 01:23:42,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-07 01:23:42,328 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 56 [2021-12-07 01:23:42,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:23:42,329 INFO L225 Difference]: With dead ends: 64 [2021-12-07 01:23:42,329 INFO L226 Difference]: Without dead ends: 40 [2021-12-07 01:23:42,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-07 01:23:42,330 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 7 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:23:42,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 111 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:23:42,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-07 01:23:42,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-12-07 01:23:42,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 34 states have internal predecessors, (39), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:23:42,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2021-12-07 01:23:42,336 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 56 [2021-12-07 01:23:42,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:23:42,336 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2021-12-07 01:23:42,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-07 01:23:42,336 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2021-12-07 01:23:42,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-07 01:23:42,338 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:23:42,338 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:23:42,366 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-07 01:23:42,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:23:42,540 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:23:42,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:23:42,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1253498369, now seen corresponding path program 3 times [2021-12-07 01:23:42,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:23:42,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276678496] [2021-12-07 01:23:42,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:42,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:23:42,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:42,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-07 01:23:42,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:42,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-07 01:23:42,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:42,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-07 01:23:42,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:42,730 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-12-07 01:23:42,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:23:42,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276678496] [2021-12-07 01:23:42,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276678496] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:23:42,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143219623] [2021-12-07 01:23:42,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 01:23:42,731 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:23:42,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:23:42,738 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:23:42,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-07 01:23:42,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-07 01:23:42,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:23:42,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 01:23:42,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:23:42,846 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-12-07 01:23:42,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:23:42,902 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-12-07 01:23:42,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143219623] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:23:42,902 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:23:42,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2021-12-07 01:23:42,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468970047] [2021-12-07 01:23:42,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:23:42,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-07 01:23:42,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:23:42,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-07 01:23:42,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:23:42,904 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 01:23:42,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:23:42,919 INFO L93 Difference]: Finished difference Result 73 states and 92 transitions. [2021-12-07 01:23:42,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-07 01:23:42,920 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 60 [2021-12-07 01:23:42,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:23:42,921 INFO L225 Difference]: With dead ends: 73 [2021-12-07 01:23:42,921 INFO L226 Difference]: Without dead ends: 48 [2021-12-07 01:23:42,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 123 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:23:42,922 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 17 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:23:42,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 100 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:23:42,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-07 01:23:42,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-12-07 01:23:42,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.186046511627907) internal successors, (51), 43 states have internal predecessors, (51), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:23:42,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2021-12-07 01:23:42,927 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 60 [2021-12-07 01:23:42,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:23:42,927 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2021-12-07 01:23:42,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 01:23:42,927 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2021-12-07 01:23:42,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-07 01:23:42,928 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:23:42,928 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 5, 5, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:23:42,948 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-07 01:23:43,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-07 01:23:43,130 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:23:43,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:23:43,131 INFO L85 PathProgramCache]: Analyzing trace with hash -156103101, now seen corresponding path program 4 times [2021-12-07 01:23:43,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:23:43,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350144815] [2021-12-07 01:23:43,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:43,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:23:43,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:43,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-07 01:23:43,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:43,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-07 01:23:43,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:43,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-07 01:23:43,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:43,338 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-12-07 01:23:43,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:23:43,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350144815] [2021-12-07 01:23:43,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350144815] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:23:43,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483556451] [2021-12-07 01:23:43,338 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 01:23:43,338 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:23:43,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:23:43,339 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:23:43,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-07 01:23:43,416 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 01:23:43,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:23:43,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 01:23:43,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:23:43,496 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 180 proven. 4 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-12-07 01:23:43,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:23:43,575 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-12-07 01:23:43,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483556451] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:23:43,576 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:23:43,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2021-12-07 01:23:43,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487095986] [2021-12-07 01:23:43,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:23:43,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-07 01:23:43,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:23:43,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-07 01:23:43,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:23:43,577 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-07 01:23:43,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:23:43,595 INFO L93 Difference]: Finished difference Result 78 states and 94 transitions. [2021-12-07 01:23:43,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 01:23:43,596 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 87 [2021-12-07 01:23:43,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:23:43,597 INFO L225 Difference]: With dead ends: 78 [2021-12-07 01:23:43,597 INFO L226 Difference]: Without dead ends: 52 [2021-12-07 01:23:43,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 177 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:23:43,599 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 4 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:23:43,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 95 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:23:43,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-07 01:23:43,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-12-07 01:23:43,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 47 states have internal predecessors, (55), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:23:43,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2021-12-07 01:23:43,604 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 87 [2021-12-07 01:23:43,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:23:43,604 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2021-12-07 01:23:43,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-07 01:23:43,604 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2021-12-07 01:23:43,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-07 01:23:43,605 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:23:43,605 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:23:43,625 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-07 01:23:43,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-07 01:23:43,807 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:23:43,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:23:43,808 INFO L85 PathProgramCache]: Analyzing trace with hash 2081062919, now seen corresponding path program 5 times [2021-12-07 01:23:43,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:23:43,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662761468] [2021-12-07 01:23:43,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:43,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:23:44,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:44,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-07 01:23:44,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:44,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-07 01:23:44,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:44,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-07 01:23:44,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:44,447 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-12-07 01:23:44,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:23:44,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662761468] [2021-12-07 01:23:44,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662761468] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:23:44,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204044244] [2021-12-07 01:23:44,447 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-07 01:23:44,448 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:23:44,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:23:44,448 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:23:44,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-07 01:23:44,835 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-12-07 01:23:44,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:23:44,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-07 01:23:44,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:23:45,604 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-12-07 01:23:45,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:23:46,140 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-12-07 01:23:46,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204044244] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:23:46,141 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:23:46,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 24 [2021-12-07 01:23:46,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107197063] [2021-12-07 01:23:46,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:23:46,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-07 01:23:46,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:23:46,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-07 01:23:46,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-12-07 01:23:46,152 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand has 24 states, 23 states have (on average 2.347826086956522) internal successors, (54), 19 states have internal predecessors, (54), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-07 01:23:46,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:23:46,431 INFO L93 Difference]: Finished difference Result 147 states and 205 transitions. [2021-12-07 01:23:46,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-07 01:23:46,432 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.347826086956522) internal successors, (54), 19 states have internal predecessors, (54), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 91 [2021-12-07 01:23:46,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:23:46,436 INFO L225 Difference]: With dead ends: 147 [2021-12-07 01:23:46,436 INFO L226 Difference]: Without dead ends: 143 [2021-12-07 01:23:46,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 176 SyntacticMatches, 14 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-12-07 01:23:46,438 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 44 mSDsluCounter, 1265 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 1346 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:23:46,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 1346 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 01:23:46,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-12-07 01:23:46,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 108. [2021-12-07 01:23:46,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 100 states have (on average 1.26) internal successors, (126), 101 states have internal predecessors, (126), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-12-07 01:23:46,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 140 transitions. [2021-12-07 01:23:46,467 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 140 transitions. Word has length 91 [2021-12-07 01:23:46,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:23:46,467 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 140 transitions. [2021-12-07 01:23:46,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.347826086956522) internal successors, (54), 19 states have internal predecessors, (54), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-07 01:23:46,468 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 140 transitions. [2021-12-07 01:23:46,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-07 01:23:46,471 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:23:46,471 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:23:46,504 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-07 01:23:46,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:23:46,676 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:23:46,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:23:46,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1533846007, now seen corresponding path program 1 times [2021-12-07 01:23:46,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:23:46,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973106856] [2021-12-07 01:23:46,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:46,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:23:46,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:47,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-07 01:23:47,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:47,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-07 01:23:47,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:47,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-07 01:23:47,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:47,355 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 89 proven. 264 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-07 01:23:47,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:23:47,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973106856] [2021-12-07 01:23:47,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973106856] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:23:47,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876783285] [2021-12-07 01:23:47,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:47,356 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:23:47,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:23:47,357 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:23:47,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-07 01:23:47,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:47,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-07 01:23:47,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:23:47,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:23:47,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-12-07 01:23:47,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-12-07 01:23:48,170 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 181 proven. 132 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-12-07 01:23:48,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:23:48,734 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 196 proven. 115 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-12-07 01:23:48,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876783285] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:23:48,735 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:23:48,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 17, 15] total 45 [2021-12-07 01:23:48,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038659943] [2021-12-07 01:23:48,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:23:48,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-07 01:23:48,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:23:48,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-07 01:23:48,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1825, Unknown=0, NotChecked=0, Total=1980 [2021-12-07 01:23:48,737 INFO L87 Difference]: Start difference. First operand 108 states and 140 transitions. Second operand has 45 states, 43 states have (on average 2.9069767441860463) internal successors, (125), 42 states have internal predecessors, (125), 5 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2021-12-07 01:23:50,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:23:50,735 INFO L93 Difference]: Finished difference Result 439 states and 640 transitions. [2021-12-07 01:23:50,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-12-07 01:23:50,735 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 43 states have (on average 2.9069767441860463) internal successors, (125), 42 states have internal predecessors, (125), 5 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 91 [2021-12-07 01:23:50,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:23:50,738 INFO L225 Difference]: With dead ends: 439 [2021-12-07 01:23:50,738 INFO L226 Difference]: Without dead ends: 319 [2021-12-07 01:23:50,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 177 SyntacticMatches, 4 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1742 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=682, Invalid=6458, Unknown=0, NotChecked=0, Total=7140 [2021-12-07 01:23:50,742 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 197 mSDsluCounter, 643 mSDsCounter, 0 mSdLazyCounter, 1016 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 679 SdHoareTripleChecker+Invalid, 1898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 775 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-07 01:23:50,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 679 Invalid, 1898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1016 Invalid, 0 Unknown, 775 Unchecked, 0.6s Time] [2021-12-07 01:23:50,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-12-07 01:23:50,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 269. [2021-12-07 01:23:50,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 249 states have (on average 1.3373493975903614) internal successors, (333), 254 states have internal predecessors, (333), 11 states have call successors, (11), 3 states have call predecessors, (11), 8 states have return successors, (68), 11 states have call predecessors, (68), 11 states have call successors, (68) [2021-12-07 01:23:50,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 412 transitions. [2021-12-07 01:23:50,769 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 412 transitions. Word has length 91 [2021-12-07 01:23:50,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:23:50,770 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 412 transitions. [2021-12-07 01:23:50,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 43 states have (on average 2.9069767441860463) internal successors, (125), 42 states have internal predecessors, (125), 5 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2021-12-07 01:23:50,770 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 412 transitions. [2021-12-07 01:23:50,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-07 01:23:50,773 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:23:50,773 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:23:50,794 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-07 01:23:50,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-07 01:23:50,975 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:23:50,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:23:50,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1955738939, now seen corresponding path program 2 times [2021-12-07 01:23:50,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:23:50,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714954014] [2021-12-07 01:23:50,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:23:50,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:23:51,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:51,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-07 01:23:51,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:51,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-07 01:23:51,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:51,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-07 01:23:51,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:23:51,569 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 180 proven. 188 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-07 01:23:51,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:23:51,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714954014] [2021-12-07 01:23:51,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714954014] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:23:51,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770684740] [2021-12-07 01:23:51,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:23:51,569 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:23:51,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:23:51,570 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:23:51,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-07 01:23:51,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 01:23:51,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:23:51,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 72 conjunts are in the unsatisfiable core [2021-12-07 01:23:51,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:23:51,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:23:51,908 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-07 01:23:51,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 32 [2021-12-07 01:23:51,945 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-07 01:23:51,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 32 [2021-12-07 01:23:51,982 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-07 01:23:51,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 32 [2021-12-07 01:23:52,017 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-07 01:23:52,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 30 [2021-12-07 01:23:52,059 INFO L354 Elim1Store]: treesize reduction 39, result has 18.8 percent of original size [2021-12-07 01:23:52,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 33 [2021-12-07 01:24:02,907 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 190 proven. 187 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-07 01:24:02,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:24:12,533 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 205 proven. 146 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-12-07 01:24:12,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770684740] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:24:12,534 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:24:12,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27, 24] total 62 [2021-12-07 01:24:12,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283781690] [2021-12-07 01:24:12,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:24:12,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-12-07 01:24:12,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:24:12,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-12-07 01:24:12,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=3517, Unknown=18, NotChecked=0, Total=3782 [2021-12-07 01:24:12,536 INFO L87 Difference]: Start difference. First operand 269 states and 412 transitions. Second operand has 62 states, 62 states have (on average 2.338709677419355) internal successors, (145), 59 states have internal predecessors, (145), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-07 01:25:25,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:25:25,758 INFO L93 Difference]: Finished difference Result 988 states and 1668 transitions. [2021-12-07 01:25:25,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-12-07 01:25:25,759 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.338709677419355) internal successors, (145), 59 states have internal predecessors, (145), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 91 [2021-12-07 01:25:25,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:25:25,765 INFO L225 Difference]: With dead ends: 988 [2021-12-07 01:25:25,765 INFO L226 Difference]: Without dead ends: 672 [2021-12-07 01:25:25,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 159 SyntacticMatches, 9 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2615 ImplicationChecksByTransitivity, 92.7s TimeCoverageRelationStatistics Valid=704, Invalid=7986, Unknown=52, NotChecked=0, Total=8742 [2021-12-07 01:25:25,770 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 146 mSDsluCounter, 1142 mSDsCounter, 0 mSdLazyCounter, 1869 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 1186 SdHoareTripleChecker+Invalid, 2911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 945 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:25:25,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 1186 Invalid, 2911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1869 Invalid, 0 Unknown, 945 Unchecked, 1.0s Time] [2021-12-07 01:25:25,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-12-07 01:25:25,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 538. [2021-12-07 01:25:25,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 503 states have (on average 1.333996023856859) internal successors, (671), 514 states have internal predecessors, (671), 17 states have call successors, (17), 6 states have call predecessors, (17), 17 states have return successors, (178), 17 states have call predecessors, (178), 17 states have call successors, (178) [2021-12-07 01:25:25,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 866 transitions. [2021-12-07 01:25:25,819 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 866 transitions. Word has length 91 [2021-12-07 01:25:25,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:25:25,819 INFO L470 AbstractCegarLoop]: Abstraction has 538 states and 866 transitions. [2021-12-07 01:25:25,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.338709677419355) internal successors, (145), 59 states have internal predecessors, (145), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-07 01:25:25,820 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 866 transitions. [2021-12-07 01:25:25,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-07 01:25:25,824 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:25:25,824 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:25:25,857 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-07 01:25:26,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-07 01:25:26,026 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:25:26,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:25:26,026 INFO L85 PathProgramCache]: Analyzing trace with hash 801199241, now seen corresponding path program 3 times [2021-12-07 01:25:26,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:25:26,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836431494] [2021-12-07 01:25:26,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:25:26,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:25:26,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:25:26,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-07 01:25:26,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:25:26,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-07 01:25:26,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:25:26,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-07 01:25:26,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:25:26,708 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 91 proven. 279 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-12-07 01:25:26,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:25:26,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836431494] [2021-12-07 01:25:26,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836431494] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:25:26,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62481495] [2021-12-07 01:25:26,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 01:25:26,709 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:25:26,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:25:26,709 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:25:26,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-07 01:25:26,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-12-07 01:25:26,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:25:27,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 64 conjunts are in the unsatisfiable core [2021-12-07 01:25:27,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:25:27,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:25:27,322 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-07 01:25:27,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 32 [2021-12-07 01:25:27,364 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-07 01:25:27,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 32 [2021-12-07 01:25:27,384 INFO L354 Elim1Store]: treesize reduction 78, result has 26.4 percent of original size [2021-12-07 01:25:27,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 50 [2021-12-07 01:25:27,499 INFO L354 Elim1Store]: treesize reduction 99, result has 27.7 percent of original size [2021-12-07 01:25:27,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 63 treesize of output 67 [2021-12-07 01:25:27,666 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-07 01:25:27,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 28 [2021-12-07 01:25:55,775 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 214 proven. 133 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-12-07 01:25:55,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:25:59,600 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~2#1_42| Int)) (or (forall ((v_ArrVal_402 Int)) (<= 0 (let ((.cse0 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#x~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~2#1_42| 4) |c_ULTIMATE.start_main_~#x~0#1.offset|) v_ArrVal_402) (+ 12 |c_ULTIMATE.start_main_~#x~0#1.offset|)))) (+ (* 2 (div (* .cse0 (- 1)) 2)) .cse0)))) (< (+ |c_ULTIMATE.start_main_~i~2#1| 1) |v_ULTIMATE.start_main_~i~2#1_42|))) is different from false [2021-12-07 01:26:22,409 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 178 proven. 164 refuted. 0 times theorem prover too weak. 71 trivial. 3 not checked. [2021-12-07 01:26:22,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62481495] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:26:22,409 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:26:22,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28, 28] total 73 [2021-12-07 01:26:22,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228987368] [2021-12-07 01:26:22,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:26:22,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-12-07 01:26:22,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:26:22,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-12-07 01:26:22,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=475, Invalid=4620, Unknown=21, NotChecked=140, Total=5256 [2021-12-07 01:26:22,412 INFO L87 Difference]: Start difference. First operand 538 states and 866 transitions. Second operand has 73 states, 73 states have (on average 2.0547945205479454) internal successors, (150), 72 states have internal predecessors, (150), 5 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-07 01:32:58,695 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-12-07 01:32:58,695 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 101 [2021-12-07 01:32:58,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-12-07 01:32:58,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 158 SyntacticMatches, 7 SemanticMatches, 154 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 7157 ImplicationChecksByTransitivity, 449.2s TimeCoverageRelationStatistics Valid=2484, Invalid=21199, Unknown=191, NotChecked=306, Total=24180 [2021-12-07 01:32:58,703 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 127 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 1033 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 1946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 1033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 621 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-07 01:32:58,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 244 Invalid, 1946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 1033 Invalid, 0 Unknown, 621 Unchecked, 0.8s Time] [2021-12-07 01:32:58,722 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-07 01:32:58,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-07 01:32:58,906 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:241) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:260) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:61) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.getRedundancy(SimplifyDDA.java:621) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getRedundancy(SimplifyDDAWithTimeout.java:120) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA$Simplifier.walk(SimplifyDDA.java:371) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.simplifyOnce(SimplifyDDA.java:650) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getSimplifiedTerm(SimplifyDDAWithTimeout.java:180) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:192) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:159) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:360) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:388) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:229) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:282) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1465) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:237) ... 56 more [2021-12-07 01:32:58,913 INFO L158 Benchmark]: Toolchain (without parser) took 559396.89ms. Allocated memory was 107.0MB in the beginning and 157.3MB in the end (delta: 50.3MB). Free memory was 64.5MB in the beginning and 52.3MB in the end (delta: 12.2MB). Peak memory consumption was 62.8MB. Max. memory is 16.1GB. [2021-12-07 01:32:58,913 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 107.0MB. Free memory is still 80.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-07 01:32:58,914 INFO L158 Benchmark]: CACSL2BoogieTranslator took 200.39ms. Allocated memory is still 107.0MB. Free memory was 64.2MB in the beginning and 81.5MB in the end (delta: -17.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-12-07 01:32:58,915 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.82ms. Allocated memory is still 107.0MB. Free memory was 81.5MB in the beginning and 79.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-07 01:32:58,916 INFO L158 Benchmark]: Boogie Preprocessor took 18.73ms. Allocated memory is still 107.0MB. Free memory was 79.8MB in the beginning and 78.6MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-07 01:32:58,916 INFO L158 Benchmark]: RCFGBuilder took 237.31ms. Allocated memory is still 107.0MB. Free memory was 78.6MB in the beginning and 67.6MB in the end (delta: 11.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-07 01:32:58,917 INFO L158 Benchmark]: TraceAbstraction took 558905.70ms. Allocated memory was 107.0MB in the beginning and 157.3MB in the end (delta: 50.3MB). Free memory was 67.2MB in the beginning and 52.3MB in the end (delta: 14.9MB). Peak memory consumption was 67.1MB. Max. memory is 16.1GB. [2021-12-07 01:32:58,922 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 107.0MB. Free memory is still 80.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 200.39ms. Allocated memory is still 107.0MB. Free memory was 64.2MB in the beginning and 81.5MB in the end (delta: -17.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 29.82ms. Allocated memory is still 107.0MB. Free memory was 81.5MB in the beginning and 79.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 18.73ms. Allocated memory is still 107.0MB. Free memory was 79.8MB in the beginning and 78.6MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 237.31ms. Allocated memory is still 107.0MB. Free memory was 78.6MB in the beginning and 67.6MB in the end (delta: 11.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 558905.70ms. Allocated memory was 107.0MB in the beginning and 157.3MB in the end (delta: 50.3MB). Free memory was 67.2MB in the beginning and 52.3MB in the end (delta: 14.9MB). Peak memory consumption was 67.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:241) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/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_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/reducercommutativity/sep05-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/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 ac50477087b7e2b9c80860ad42d4d46d99ddf32e797cee205c21d5ff44f08ec3 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-07 01:33:00,232 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-07 01:33:00,234 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-07 01:33:00,256 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-07 01:33:00,257 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-07 01:33:00,258 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-07 01:33:00,259 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-07 01:33:00,261 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-07 01:33:00,262 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-07 01:33:00,263 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-07 01:33:00,264 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-07 01:33:00,265 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-07 01:33:00,265 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-07 01:33:00,266 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-07 01:33:00,267 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-07 01:33:00,269 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-07 01:33:00,269 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-07 01:33:00,270 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-07 01:33:00,286 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-07 01:33:00,288 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-07 01:33:00,290 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-07 01:33:00,291 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-07 01:33:00,292 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-07 01:33:00,293 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-07 01:33:00,296 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-07 01:33:00,296 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-07 01:33:00,297 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-07 01:33:00,297 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-07 01:33:00,298 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-07 01:33:00,299 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-07 01:33:00,299 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-07 01:33:00,300 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-07 01:33:00,301 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-07 01:33:00,301 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-07 01:33:00,302 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-07 01:33:00,303 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-07 01:33:00,303 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-07 01:33:00,304 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-07 01:33:00,304 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-07 01:33:00,305 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-07 01:33:00,305 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-07 01:33:00,306 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-07 01:33:00,326 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-07 01:33:00,326 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-07 01:33:00,326 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-07 01:33:00,326 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-07 01:33:00,327 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-07 01:33:00,327 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-07 01:33:00,328 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-07 01:33:00,328 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-07 01:33:00,328 INFO L138 SettingsManager]: * Use SBE=true [2021-12-07 01:33:00,328 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-07 01:33:00,328 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-07 01:33:00,328 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-07 01:33:00,328 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-07 01:33:00,329 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-07 01:33:00,329 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-07 01:33:00,329 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-07 01:33:00,329 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-07 01:33:00,329 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-07 01:33:00,329 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-07 01:33:00,329 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-07 01:33:00,330 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-07 01:33:00,330 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-07 01:33:00,330 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-07 01:33:00,330 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-07 01:33:00,330 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-07 01:33:00,330 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-07 01:33:00,330 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 01:33:00,331 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-07 01:33:00,331 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-07 01:33:00,331 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-07 01:33:00,331 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-07 01:33:00,331 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-07 01:33:00,331 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-07 01:33:00,332 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-07 01:33:00,332 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-07 01:33:00,332 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-07 01:33:00,332 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-07 01:33:00,332 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_c09c70de-5198-4842-942e-14f0209d70d6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac50477087b7e2b9c80860ad42d4d46d99ddf32e797cee205c21d5ff44f08ec3 [2021-12-07 01:33:00,555 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-07 01:33:00,574 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-07 01:33:00,575 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-07 01:33:00,576 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-07 01:33:00,577 INFO L275 PluginConnector]: CDTParser initialized [2021-12-07 01:33:00,578 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/reducercommutativity/sep05-1.i [2021-12-07 01:33:00,621 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/data/48d0bbcbd/b5fc2c94b27e4075bd4db0dd1bfef5bb/FLAG037072a94 [2021-12-07 01:33:01,004 INFO L306 CDTParser]: Found 1 translation units. [2021-12-07 01:33:01,004 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/sv-benchmarks/c/reducercommutativity/sep05-1.i [2021-12-07 01:33:01,009 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/data/48d0bbcbd/b5fc2c94b27e4075bd4db0dd1bfef5bb/FLAG037072a94 [2021-12-07 01:33:01,019 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/data/48d0bbcbd/b5fc2c94b27e4075bd4db0dd1bfef5bb [2021-12-07 01:33:01,020 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-07 01:33:01,021 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-07 01:33:01,022 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-07 01:33:01,023 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-07 01:33:01,025 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-07 01:33:01,026 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:33:01" (1/1) ... [2021-12-07 01:33:01,026 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@117e6d3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:33:01, skipping insertion in model container [2021-12-07 01:33:01,027 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:33:01" (1/1) ... [2021-12-07 01:33:01,031 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-07 01:33:01,043 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-07 01:33:01,165 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_c09c70de-5198-4842-942e-14f0209d70d6/sv-benchmarks/c/reducercommutativity/sep05-1.i[1287,1300] [2021-12-07 01:33:01,168 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 01:33:01,176 INFO L203 MainTranslator]: Completed pre-run [2021-12-07 01:33:01,203 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_c09c70de-5198-4842-942e-14f0209d70d6/sv-benchmarks/c/reducercommutativity/sep05-1.i[1287,1300] [2021-12-07 01:33:01,204 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 01:33:01,225 INFO L208 MainTranslator]: Completed translation [2021-12-07 01:33:01,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:33:01 WrapperNode [2021-12-07 01:33:01,226 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-07 01:33:01,226 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-07 01:33:01,227 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-07 01:33:01,227 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-07 01:33:01,239 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:33:01" (1/1) ... [2021-12-07 01:33:01,246 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:33:01" (1/1) ... [2021-12-07 01:33:01,264 INFO L137 Inliner]: procedures = 18, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 63 [2021-12-07 01:33:01,265 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-07 01:33:01,266 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-07 01:33:01,266 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-07 01:33:01,266 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-07 01:33:01,274 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:33:01" (1/1) ... [2021-12-07 01:33:01,274 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:33:01" (1/1) ... [2021-12-07 01:33:01,276 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:33:01" (1/1) ... [2021-12-07 01:33:01,277 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:33:01" (1/1) ... [2021-12-07 01:33:01,282 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:33:01" (1/1) ... [2021-12-07 01:33:01,286 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:33:01" (1/1) ... [2021-12-07 01:33:01,287 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:33:01" (1/1) ... [2021-12-07 01:33:01,289 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-07 01:33:01,289 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-07 01:33:01,289 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-07 01:33:01,290 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-07 01:33:01,290 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:33:01" (1/1) ... [2021-12-07 01:33:01,296 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 01:33:01,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:33:01,314 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-07 01:33:01,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-07 01:33:01,343 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-07 01:33:01,343 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-07 01:33:01,343 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-07 01:33:01,343 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-07 01:33:01,343 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-07 01:33:01,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-07 01:33:01,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-07 01:33:01,344 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-07 01:33:01,344 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2021-12-07 01:33:01,344 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2021-12-07 01:33:01,400 INFO L236 CfgBuilder]: Building ICFG [2021-12-07 01:33:01,402 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-07 01:33:01,528 INFO L277 CfgBuilder]: Performing block encoding [2021-12-07 01:33:01,533 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-07 01:33:01,533 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-07 01:33:01,534 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:33:01 BoogieIcfgContainer [2021-12-07 01:33:01,535 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-07 01:33:01,536 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-07 01:33:01,536 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-07 01:33:01,538 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-07 01:33:01,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 01:33:01" (1/3) ... [2021-12-07 01:33:01,539 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76f29e46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:33:01, skipping insertion in model container [2021-12-07 01:33:01,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:33:01" (2/3) ... [2021-12-07 01:33:01,539 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76f29e46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:33:01, skipping insertion in model container [2021-12-07 01:33:01,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:33:01" (3/3) ... [2021-12-07 01:33:01,540 INFO L111 eAbstractionObserver]: Analyzing ICFG sep05-1.i [2021-12-07 01:33:01,545 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-07 01:33:01,545 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-07 01:33:01,581 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-07 01:33:01,586 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 [2021-12-07 01:33:01,587 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-07 01:33:01,599 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:33:01,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-07 01:33:01,605 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:33:01,606 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:33:01,606 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:33:01,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:33:01,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1312709850, now seen corresponding path program 1 times [2021-12-07 01:33:01,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:33:01,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1501225032] [2021-12-07 01:33:01,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:33:01,621 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:33:01,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:33:01,622 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:33:01,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-07 01:33:01,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:33:01,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-07 01:33:01,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:33:01,757 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-07 01:33:01,757 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:33:01,758 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:33:01,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1501225032] [2021-12-07 01:33:01,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1501225032] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:33:01,758 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:33:01,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 01:33:01,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032144334] [2021-12-07 01:33:01,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:33:01,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-07 01:33:01,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:33:01,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-07 01:33:01,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-07 01:33:01,786 INFO L87 Difference]: Start difference. First operand has 27 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-07 01:33:01,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:33:01,800 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2021-12-07 01:33:01,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-07 01:33:01,802 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2021-12-07 01:33:01,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:33:01,807 INFO L225 Difference]: With dead ends: 50 [2021-12-07 01:33:01,807 INFO L226 Difference]: Without dead ends: 23 [2021-12-07 01:33:01,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-07 01:33:01,812 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:33:01,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:33:01,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-12-07 01:33:01,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-12-07 01:33:01,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:33:01,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2021-12-07 01:33:01,840 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 28 [2021-12-07 01:33:01,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:33:01,840 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2021-12-07 01:33:01,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-07 01:33:01,840 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2021-12-07 01:33:01,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-07 01:33:01,842 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:33:01,842 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:33:01,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-07 01:33:02,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:33:02,043 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:33:02,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:33:02,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1971914501, now seen corresponding path program 1 times [2021-12-07 01:33:02,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:33:02,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [917332547] [2021-12-07 01:33:02,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:33:02,044 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:33:02,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:33:02,045 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:33:02,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-07 01:33:02,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:33:02,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-07 01:33:02,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:33:02,151 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-07 01:33:02,152 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:33:02,152 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:33:02,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [917332547] [2021-12-07 01:33:02,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [917332547] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:33:02,153 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:33:02,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:33:02,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788218181] [2021-12-07 01:33:02,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:33:02,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:33:02,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:33:02,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:33:02,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:33:02,156 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-07 01:33:02,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:33:02,172 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2021-12-07 01:33:02,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:33:02,173 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2021-12-07 01:33:02,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:33:02,174 INFO L225 Difference]: With dead ends: 44 [2021-12-07 01:33:02,174 INFO L226 Difference]: Without dead ends: 25 [2021-12-07 01:33:02,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:33:02,176 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 1 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:33:02,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 50 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:33:02,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-12-07 01:33:02,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-12-07 01:33:02,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:33:02,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2021-12-07 01:33:02,183 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 28 [2021-12-07 01:33:02,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:33:02,184 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2021-12-07 01:33:02,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-07 01:33:02,184 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2021-12-07 01:33:02,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-07 01:33:02,185 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:33:02,185 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:33:02,193 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-12-07 01:33:02,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:33:02,388 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:33:02,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:33:02,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1845794557, now seen corresponding path program 1 times [2021-12-07 01:33:02,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:33:02,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1468496557] [2021-12-07 01:33:02,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:33:02,393 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:33:02,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:33:02,396 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:33:02,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-07 01:33:02,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:33:02,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 01:33:02,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:33:02,600 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-07 01:33:02,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:33:02,652 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-07 01:33:02,652 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:33:02,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1468496557] [2021-12-07 01:33:02,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1468496557] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:33:02,653 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:33:02,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-12-07 01:33:02,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608550380] [2021-12-07 01:33:02,653 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:33:02,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-07 01:33:02,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:33:02,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-07 01:33:02,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-07 01:33:02,654 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 01:33:02,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:33:02,692 INFO L93 Difference]: Finished difference Result 49 states and 61 transitions. [2021-12-07 01:33:02,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 01:33:02,692 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 30 [2021-12-07 01:33:02,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:33:02,693 INFO L225 Difference]: With dead ends: 49 [2021-12-07 01:33:02,693 INFO L226 Difference]: Without dead ends: 30 [2021-12-07 01:33:02,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:33:02,694 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 4 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:33:02,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 98 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:33:02,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-07 01:33:02,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-12-07 01:33:02,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:33:02,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2021-12-07 01:33:02,699 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 30 [2021-12-07 01:33:02,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:33:02,700 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2021-12-07 01:33:02,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 01:33:02,700 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2021-12-07 01:33:02,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-07 01:33:02,701 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:33:02,701 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:33:02,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-07 01:33:02,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:33:02,903 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:33:02,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:33:02,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1954094595, now seen corresponding path program 2 times [2021-12-07 01:33:02,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:33:02,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2075903243] [2021-12-07 01:33:02,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:33:02,908 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:33:02,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:33:02,911 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:33:02,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-07 01:33:03,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-07 01:33:03,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:33:03,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-07 01:33:03,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:33:03,062 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-07 01:33:03,062 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:33:03,062 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:33:03,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2075903243] [2021-12-07 01:33:03,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2075903243] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:33:03,063 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:33:03,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:33:03,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562664681] [2021-12-07 01:33:03,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:33:03,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:33:03,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:33:03,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:33:03,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:33:03,064 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-07 01:33:03,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:33:03,073 INFO L93 Difference]: Finished difference Result 51 states and 64 transitions. [2021-12-07 01:33:03,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:33:03,074 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2021-12-07 01:33:03,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:33:03,074 INFO L225 Difference]: With dead ends: 51 [2021-12-07 01:33:03,075 INFO L226 Difference]: Without dead ends: 33 [2021-12-07 01:33:03,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:33:03,076 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 3 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:33:03,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 50 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:33:03,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-07 01:33:03,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2021-12-07 01:33:03,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:33:03,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2021-12-07 01:33:03,080 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 36 [2021-12-07 01:33:03,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:33:03,081 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2021-12-07 01:33:03,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-07 01:33:03,081 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2021-12-07 01:33:03,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-07 01:33:03,082 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:33:03,082 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:33:03,089 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-12-07 01:33:03,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:33:03,284 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:33:03,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:33:03,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1185068225, now seen corresponding path program 1 times [2021-12-07 01:33:03,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:33:03,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [951207320] [2021-12-07 01:33:03,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:33:03,288 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:33:03,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:33:03,291 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:33:03,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-07 01:33:03,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:33:03,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-07 01:33:03,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:33:03,439 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-07 01:33:03,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:33:03,538 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-07 01:33:03,538 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:33:03,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [951207320] [2021-12-07 01:33:03,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [951207320] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:33:03,538 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:33:03,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-12-07 01:33:03,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463912132] [2021-12-07 01:33:03,539 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:33:03,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-07 01:33:03,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:33:03,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-07 01:33:03,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-12-07 01:33:03,541 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 01:33:03,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:33:03,595 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2021-12-07 01:33:03,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-07 01:33:03,595 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 45 [2021-12-07 01:33:03,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:33:03,596 INFO L225 Difference]: With dead ends: 54 [2021-12-07 01:33:03,596 INFO L226 Difference]: Without dead ends: 34 [2021-12-07 01:33:03,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-12-07 01:33:03,597 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 6 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:33:03,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 146 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:33:03,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-07 01:33:03,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-12-07 01:33:03,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:33:03,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2021-12-07 01:33:03,602 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 45 [2021-12-07 01:33:03,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:33:03,602 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2021-12-07 01:33:03,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 01:33:03,603 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2021-12-07 01:33:03,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-07 01:33:03,604 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:33:03,604 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:33:03,611 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-12-07 01:33:03,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:33:03,805 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:33:03,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:33:03,807 INFO L85 PathProgramCache]: Analyzing trace with hash -513238273, now seen corresponding path program 2 times [2021-12-07 01:33:03,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:33:03,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1954599970] [2021-12-07 01:33:03,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:33:03,808 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:33:03,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:33:03,809 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:33:03,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-07 01:33:03,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 01:33:03,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:33:03,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 01:33:03,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:33:04,006 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-07 01:33:04,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:33:04,066 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-07 01:33:04,066 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:33:04,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1954599970] [2021-12-07 01:33:04,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1954599970] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:33:04,067 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:33:04,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-12-07 01:33:04,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825659172] [2021-12-07 01:33:04,067 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:33:04,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-07 01:33:04,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:33:04,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-07 01:33:04,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-07 01:33:04,068 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-07 01:33:04,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:33:04,102 INFO L93 Difference]: Finished difference Result 61 states and 78 transitions. [2021-12-07 01:33:04,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 01:33:04,102 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 47 [2021-12-07 01:33:04,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:33:04,103 INFO L225 Difference]: With dead ends: 61 [2021-12-07 01:33:04,103 INFO L226 Difference]: Without dead ends: 42 [2021-12-07 01:33:04,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:33:04,104 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 15 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:33:04,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 100 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:33:04,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-12-07 01:33:04,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-12-07 01:33:04,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 37 states have internal predecessors, (44), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:33:04,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2021-12-07 01:33:04,109 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 47 [2021-12-07 01:33:04,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:33:04,110 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2021-12-07 01:33:04,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-07 01:33:04,110 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2021-12-07 01:33:04,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-07 01:33:04,111 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:33:04,111 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:33:04,122 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-12-07 01:33:04,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:33:04,313 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:33:04,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:33:04,315 INFO L85 PathProgramCache]: Analyzing trace with hash 250884229, now seen corresponding path program 3 times [2021-12-07 01:33:04,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:33:04,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [169970644] [2021-12-07 01:33:04,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 01:33:04,317 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:33:04,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:33:04,320 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:33:04,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-07 01:33:04,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-07 01:33:04,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:33:04,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-07 01:33:04,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:33:04,550 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2021-12-07 01:33:04,550 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:33:04,550 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:33:04,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [169970644] [2021-12-07 01:33:04,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [169970644] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:33:04,550 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:33:04,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:33:04,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586456574] [2021-12-07 01:33:04,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:33:04,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:33:04,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:33:04,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:33:04,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:33:04,552 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-07 01:33:04,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:33:04,566 INFO L93 Difference]: Finished difference Result 67 states and 80 transitions. [2021-12-07 01:33:04,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:33:04,567 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 74 [2021-12-07 01:33:04,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:33:04,568 INFO L225 Difference]: With dead ends: 67 [2021-12-07 01:33:04,569 INFO L226 Difference]: Without dead ends: 44 [2021-12-07 01:33:04,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:33:04,570 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 1 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:33:04,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 49 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:33:04,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-07 01:33:04,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2021-12-07 01:33:04,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 38 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:33:04,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2021-12-07 01:33:04,577 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 74 [2021-12-07 01:33:04,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:33:04,578 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2021-12-07 01:33:04,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-07 01:33:04,578 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2021-12-07 01:33:04,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-07 01:33:04,579 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:33:04,579 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:33:04,588 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-12-07 01:33:04,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:33:04,781 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:33:04,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:33:04,783 INFO L85 PathProgramCache]: Analyzing trace with hash 990958115, now seen corresponding path program 1 times [2021-12-07 01:33:04,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:33:04,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [26539076] [2021-12-07 01:33:04,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:33:04,785 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:33:04,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:33:04,787 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:33:04,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-07 01:33:04,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:33:04,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-07 01:33:04,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:33:05,040 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 116 proven. 22 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-12-07 01:33:05,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:33:05,159 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-12-07 01:33:05,159 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:33:05,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [26539076] [2021-12-07 01:33:05,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [26539076] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:33:05,160 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:33:05,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-12-07 01:33:05,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248741247] [2021-12-07 01:33:05,160 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:33:05,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-07 01:33:05,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:33:05,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-07 01:33:05,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-12-07 01:33:05,162 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 12 states have internal predecessors, (56), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-07 01:33:05,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:33:05,209 INFO L93 Difference]: Finished difference Result 77 states and 97 transitions. [2021-12-07 01:33:05,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-07 01:33:05,209 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 12 states have internal predecessors, (56), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 76 [2021-12-07 01:33:05,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:33:05,210 INFO L225 Difference]: With dead ends: 77 [2021-12-07 01:33:05,211 INFO L226 Difference]: Without dead ends: 48 [2021-12-07 01:33:05,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-12-07 01:33:05,212 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 34 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:33:05,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 184 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:33:05,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-07 01:33:05,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2021-12-07 01:33:05,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 41 states have internal predecessors, (49), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:33:05,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2021-12-07 01:33:05,219 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 76 [2021-12-07 01:33:05,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:33:05,220 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2021-12-07 01:33:05,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 12 states have internal predecessors, (56), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-07 01:33:05,220 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2021-12-07 01:33:05,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-07 01:33:05,222 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:33:05,222 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:33:05,230 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-12-07 01:33:05,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:33:05,423 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:33:05,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:33:05,423 INFO L85 PathProgramCache]: Analyzing trace with hash -516090719, now seen corresponding path program 2 times [2021-12-07 01:33:05,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:33:05,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1325514380] [2021-12-07 01:33:05,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:33:05,424 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:33:05,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:33:05,424 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:33:05,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-07 01:33:05,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 01:33:05,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:33:05,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 01:33:05,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:33:05,597 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 180 proven. 1 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-12-07 01:33:05,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:33:05,658 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-12-07 01:33:05,659 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:33:05,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1325514380] [2021-12-07 01:33:05,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1325514380] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:33:05,659 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:33:05,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-12-07 01:33:05,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547981898] [2021-12-07 01:33:05,659 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:33:05,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-07 01:33:05,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:33:05,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-07 01:33:05,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-07 01:33:05,660 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-07 01:33:05,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:33:05,696 INFO L93 Difference]: Finished difference Result 78 states and 95 transitions. [2021-12-07 01:33:05,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 01:33:05,697 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 85 [2021-12-07 01:33:05,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:33:05,698 INFO L225 Difference]: With dead ends: 78 [2021-12-07 01:33:05,698 INFO L226 Difference]: Without dead ends: 52 [2021-12-07 01:33:05,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:33:05,699 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 5 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:33:05,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 72 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:33:05,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-07 01:33:05,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-12-07 01:33:05,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 47 states have internal predecessors, (55), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:33:05,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2021-12-07 01:33:05,706 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 85 [2021-12-07 01:33:05,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:33:05,707 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2021-12-07 01:33:05,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-07 01:33:05,707 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2021-12-07 01:33:05,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-07 01:33:05,708 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:33:05,708 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:33:05,717 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-12-07 01:33:05,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:33:05,910 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:33:05,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:33:05,911 INFO L85 PathProgramCache]: Analyzing trace with hash 2081062919, now seen corresponding path program 3 times [2021-12-07 01:33:05,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:33:05,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [401497877] [2021-12-07 01:33:05,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 01:33:05,914 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:33:05,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:33:05,916 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:33:05,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-07 01:33:06,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-12-07 01:33:06,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:33:06,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-07 01:33:06,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:33:06,582 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-12-07 01:33:06,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:33:07,004 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-12-07 01:33:07,004 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:33:07,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [401497877] [2021-12-07 01:33:07,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [401497877] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:33:07,005 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:33:07,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-12-07 01:33:07,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661597750] [2021-12-07 01:33:07,005 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:33:07,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-07 01:33:07,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:33:07,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-07 01:33:07,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-12-07 01:33:07,006 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand has 23 states, 22 states have (on average 2.409090909090909) internal successors, (53), 19 states have internal predecessors, (53), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-07 01:33:07,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:33:07,322 INFO L93 Difference]: Finished difference Result 147 states and 205 transitions. [2021-12-07 01:33:07,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-07 01:33:07,322 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.409090909090909) internal successors, (53), 19 states have internal predecessors, (53), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 91 [2021-12-07 01:33:07,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:33:07,325 INFO L225 Difference]: With dead ends: 147 [2021-12-07 01:33:07,326 INFO L226 Difference]: Without dead ends: 143 [2021-12-07 01:33:07,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 158 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-12-07 01:33:07,326 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 41 mSDsluCounter, 1233 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 1314 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:33:07,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 1314 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-07 01:33:07,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-12-07 01:33:07,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 108. [2021-12-07 01:33:07,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 100 states have (on average 1.26) internal successors, (126), 101 states have internal predecessors, (126), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-12-07 01:33:07,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 140 transitions. [2021-12-07 01:33:07,351 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 140 transitions. Word has length 91 [2021-12-07 01:33:07,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:33:07,351 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 140 transitions. [2021-12-07 01:33:07,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.409090909090909) internal successors, (53), 19 states have internal predecessors, (53), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-07 01:33:07,352 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 140 transitions. [2021-12-07 01:33:07,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-07 01:33:07,354 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:33:07,354 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:33:07,364 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-12-07 01:33:07,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:33:07,556 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:33:07,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:33:07,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1533846007, now seen corresponding path program 1 times [2021-12-07 01:33:07,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:33:07,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [216537604] [2021-12-07 01:33:07,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:33:07,559 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:33:07,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:33:07,562 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:33:07,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-07 01:33:07,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:33:07,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-07 01:33:07,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:33:07,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-12-07 01:33:08,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-07 01:33:08,478 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 181 proven. 156 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-12-07 01:33:08,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:33:09,435 INFO L354 Elim1Store]: treesize reduction 4, result has 73.3 percent of original size [2021-12-07 01:33:09,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-12-07 01:33:11,520 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 191 proven. 120 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-12-07 01:33:11,520 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:33:11,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [216537604] [2021-12-07 01:33:11,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [216537604] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:33:11,521 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:33:11,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 15] total 33 [2021-12-07 01:33:11,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352676712] [2021-12-07 01:33:11,521 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:33:11,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-07 01:33:11,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:33:11,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-07 01:33:11,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=949, Unknown=1, NotChecked=0, Total=1056 [2021-12-07 01:33:11,522 INFO L87 Difference]: Start difference. First operand 108 states and 140 transitions. Second operand has 33 states, 31 states have (on average 2.870967741935484) internal successors, (89), 30 states have internal predecessors, (89), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-07 01:33:13,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:33:13,411 INFO L93 Difference]: Finished difference Result 249 states and 352 transitions. [2021-12-07 01:33:13,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-07 01:33:13,412 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 2.870967741935484) internal successors, (89), 30 states have internal predecessors, (89), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 91 [2021-12-07 01:33:13,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:33:13,414 INFO L225 Difference]: With dead ends: 249 [2021-12-07 01:33:13,414 INFO L226 Difference]: Without dead ends: 218 [2021-12-07 01:33:13,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=273, Invalid=2378, Unknown=1, NotChecked=0, Total=2652 [2021-12-07 01:33:13,416 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 134 mSDsluCounter, 618 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 1103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 433 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-07 01:33:13,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 658 Invalid, 1103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 637 Invalid, 0 Unknown, 433 Unchecked, 0.9s Time] [2021-12-07 01:33:13,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-12-07 01:33:13,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 202. [2021-12-07 01:33:13,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 189 states have (on average 1.306878306878307) internal successors, (247), 193 states have internal predecessors, (247), 6 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (29), 6 states have call predecessors, (29), 6 states have call successors, (29) [2021-12-07 01:33:13,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 282 transitions. [2021-12-07 01:33:13,439 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 282 transitions. Word has length 91 [2021-12-07 01:33:13,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:33:13,439 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 282 transitions. [2021-12-07 01:33:13,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 2.870967741935484) internal successors, (89), 30 states have internal predecessors, (89), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-07 01:33:13,439 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 282 transitions. [2021-12-07 01:33:13,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-07 01:33:13,441 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:33:13,441 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:33:13,451 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-12-07 01:33:13,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:33:13,642 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:33:13,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:33:13,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1955738939, now seen corresponding path program 2 times [2021-12-07 01:33:13,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:33:13,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [119865499] [2021-12-07 01:33:13,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:33:13,646 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:33:13,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:33:13,648 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:33:13,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-07 01:33:13,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 01:33:13,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:33:13,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-07 01:33:13,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:33:13,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:33:14,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:33:14,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:33:14,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:33:14,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2021-12-07 01:33:14,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:33:14,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2021-12-07 01:33:14,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:33:14,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2021-12-07 01:33:14,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:33:14,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2021-12-07 01:33:14,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:33:14,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 24 [2021-12-07 01:33:14,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:33:14,776 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:33:14,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 27 [2021-12-07 01:33:15,316 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 12 proven. 400 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-07 01:33:15,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:33:45,663 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:33:45,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [119865499] [2021-12-07 01:33:45,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [119865499] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:33:45,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [482175556] [2021-12-07 01:33:45,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:33:45,664 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 01:33:45,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 01:33:45,664 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 01:33:45,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-12-07 01:33:46,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 01:33:46,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:33:46,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-07 01:33:46,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:33:46,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-07 01:33:46,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:33:46,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:33:46,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:33:46,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2021-12-07 01:33:47,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:33:47,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2021-12-07 01:33:47,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:33:47,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2021-12-07 01:33:47,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:33:47,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2021-12-07 01:33:47,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:33:47,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 24 [2021-12-07 01:33:47,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:33:47,305 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:33:47,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 27 [2021-12-07 01:33:47,485 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 25 proven. 389 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-07 01:33:47,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:34:00,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [482175556] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:34:00,657 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:34:00,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 35] total 39 [2021-12-07 01:34:00,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375974537] [2021-12-07 01:34:00,657 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:34:00,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-07 01:34:00,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:34:00,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-07 01:34:00,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=2645, Unknown=14, NotChecked=0, Total=2862 [2021-12-07 01:34:00,659 INFO L87 Difference]: Start difference. First operand 202 states and 282 transitions. Second operand has 39 states, 38 states have (on average 2.6315789473684212) internal successors, (100), 38 states have internal predecessors, (100), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:34:02,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:34:02,143 INFO L93 Difference]: Finished difference Result 492 states and 679 transitions. [2021-12-07 01:34:02,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-07 01:34:02,144 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.6315789473684212) internal successors, (100), 38 states have internal predecessors, (100), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 91 [2021-12-07 01:34:02,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:34:02,147 INFO L225 Difference]: With dead ends: 492 [2021-12-07 01:34:02,147 INFO L226 Difference]: Without dead ends: 442 [2021-12-07 01:34:02,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 191 SyntacticMatches, 10 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1389 ImplicationChecksByTransitivity, 45.3s TimeCoverageRelationStatistics Valid=318, Invalid=3958, Unknown=14, NotChecked=0, Total=4290 [2021-12-07 01:34:02,149 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 57 mSDsluCounter, 843 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 896 SdHoareTripleChecker+Invalid, 1373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 675 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-07 01:34:02,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 896 Invalid, 1373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 678 Invalid, 0 Unknown, 675 Unchecked, 0.7s Time] [2021-12-07 01:34:02,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-12-07 01:34:02,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 380. [2021-12-07 01:34:02,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 359 states have (on average 1.2952646239554317) internal successors, (465), 363 states have internal predecessors, (465), 11 states have call successors, (11), 5 states have call predecessors, (11), 9 states have return successors, (52), 11 states have call predecessors, (52), 11 states have call successors, (52) [2021-12-07 01:34:02,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 528 transitions. [2021-12-07 01:34:02,187 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 528 transitions. Word has length 91 [2021-12-07 01:34:02,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:34:02,187 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 528 transitions. [2021-12-07 01:34:02,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.6315789473684212) internal successors, (100), 38 states have internal predecessors, (100), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:34:02,188 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 528 transitions. [2021-12-07 01:34:02,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-07 01:34:02,190 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:34:02,190 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:34:02,205 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-12-07 01:34:02,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-12-07 01:34:02,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-07 01:34:02,591 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:34:02,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:34:02,592 INFO L85 PathProgramCache]: Analyzing trace with hash 801199241, now seen corresponding path program 3 times [2021-12-07 01:34:02,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:34:02,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [874666193] [2021-12-07 01:34:02,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 01:34:02,592 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:34:02,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:34:02,593 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:34:02,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-07 01:34:02,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-12-07 01:34:02,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:34:02,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-07 01:34:02,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:34:02,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:34:03,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:34:03,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2021-12-07 01:34:03,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:34:03,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2021-12-07 01:34:03,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:34:03,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:34:03,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:34:03,299 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-12-07 01:34:03,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2021-12-07 01:34:03,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:34:03,416 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:34:03,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 27 [2021-12-07 01:34:03,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:34:03,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-12-07 01:34:03,915 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 187 proven. 177 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-07 01:34:03,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:34:25,639 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 217 proven. 127 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-07 01:34:25,639 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:34:25,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [874666193] [2021-12-07 01:34:25,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [874666193] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:34:25,639 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:34:25,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 22] total 44 [2021-12-07 01:34:25,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61403835] [2021-12-07 01:34:25,640 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:34:25,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-07 01:34:25,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:34:25,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-07 01:34:25,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1707, Unknown=7, NotChecked=0, Total=1892 [2021-12-07 01:34:25,641 INFO L87 Difference]: Start difference. First operand 380 states and 528 transitions. Second operand has 44 states, 44 states have (on average 2.4545454545454546) internal successors, (108), 41 states have internal predecessors, (108), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-07 01:34:29,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:34:29,995 INFO L93 Difference]: Finished difference Result 1013 states and 1560 transitions. [2021-12-07 01:34:29,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-07 01:34:29,997 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.4545454545454546) internal successors, (108), 41 states have internal predecessors, (108), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 91 [2021-12-07 01:34:29,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:34:30,003 INFO L225 Difference]: With dead ends: 1013 [2021-12-07 01:34:30,003 INFO L226 Difference]: Without dead ends: 898 [2021-12-07 01:34:30,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 144 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 24.9s TimeCoverageRelationStatistics Valid=435, Invalid=3718, Unknown=7, NotChecked=0, Total=4160 [2021-12-07 01:34:30,006 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 95 mSDsluCounter, 838 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 881 SdHoareTripleChecker+Invalid, 1628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 808 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:34:30,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 881 Invalid, 1628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 785 Invalid, 0 Unknown, 808 Unchecked, 1.3s Time] [2021-12-07 01:34:30,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2021-12-07 01:34:30,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 824. [2021-12-07 01:34:30,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 777 states have (on average 1.3243243243243243) internal successors, (1029), 797 states have internal predecessors, (1029), 17 states have call successors, (17), 9 states have call predecessors, (17), 29 states have return successors, (209), 17 states have call predecessors, (209), 17 states have call successors, (209) [2021-12-07 01:34:30,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 1255 transitions. [2021-12-07 01:34:30,070 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 1255 transitions. Word has length 91 [2021-12-07 01:34:30,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:34:30,071 INFO L470 AbstractCegarLoop]: Abstraction has 824 states and 1255 transitions. [2021-12-07 01:34:30,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.4545454545454546) internal successors, (108), 41 states have internal predecessors, (108), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-07 01:34:30,071 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 1255 transitions. [2021-12-07 01:34:30,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-07 01:34:30,077 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:34:30,077 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:34:30,086 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-12-07 01:34:30,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:34:30,278 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:34:30,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:34:30,280 INFO L85 PathProgramCache]: Analyzing trace with hash 86918213, now seen corresponding path program 4 times [2021-12-07 01:34:30,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:34:30,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1140919138] [2021-12-07 01:34:30,281 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 01:34:30,281 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:34:30,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:34:30,284 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:34:30,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-07 01:34:30,590 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 01:34:30,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:34:30,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-07 01:34:30,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:34:30,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:34:30,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:34:30,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:34:30,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:34:30,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2021-12-07 01:34:31,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:34:31,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2021-12-07 01:34:31,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:34:31,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:34:31,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:34:31,065 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-12-07 01:34:31,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2021-12-07 01:34:31,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:34:31,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:34:31,201 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:34:31,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 44 [2021-12-07 01:34:31,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:34:31,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-12-07 01:34:31,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:34:31,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-12-07 01:34:31,684 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 6 proven. 367 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-07 01:34:31,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:35:00,306 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:35:00,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1140919138] [2021-12-07 01:35:00,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1140919138] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:35:00,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1766842550] [2021-12-07 01:35:00,306 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 01:35:00,306 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 01:35:00,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 01:35:00,307 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 01:35:00,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-12-07 01:35:00,960 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 01:35:00,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:35:00,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-07 01:35:00,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:35:01,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-07 01:35:01,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-07 01:35:01,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-07 01:35:01,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:35:01,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:35:01,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:35:01,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2021-12-07 01:35:01,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:35:01,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2021-12-07 01:35:01,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:35:01,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:35:01,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:35:01,581 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-12-07 01:35:01,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2021-12-07 01:35:01,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:35:01,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:35:01,639 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:35:01,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 44 [2021-12-07 01:35:01,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:35:01,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-12-07 01:35:01,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:35:01,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-12-07 01:35:01,867 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 13 proven. 372 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-07 01:35:01,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:35:13,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1766842550] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:35:13,937 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:35:13,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 30] total 32 [2021-12-07 01:35:13,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159739504] [2021-12-07 01:35:13,938 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:35:13,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-07 01:35:13,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:35:13,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-07 01:35:13,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1770, Unknown=14, NotChecked=0, Total=1980 [2021-12-07 01:35:13,939 INFO L87 Difference]: Start difference. First operand 824 states and 1255 transitions. Second operand has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:35:15,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:35:15,057 INFO L93 Difference]: Finished difference Result 1743 states and 2787 transitions. [2021-12-07 01:35:15,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-07 01:35:15,058 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 91 [2021-12-07 01:35:15,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:35:15,068 INFO L225 Difference]: With dead ends: 1743 [2021-12-07 01:35:15,068 INFO L226 Difference]: Without dead ends: 1568 [2021-12-07 01:35:15,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 199 SyntacticMatches, 11 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1189 ImplicationChecksByTransitivity, 41.9s TimeCoverageRelationStatistics Valid=279, Invalid=2677, Unknown=14, NotChecked=0, Total=2970 [2021-12-07 01:35:15,072 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 33 mSDsluCounter, 663 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 1039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 576 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 01:35:15,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 700 Invalid, 1039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 451 Invalid, 0 Unknown, 576 Unchecked, 0.5s Time] [2021-12-07 01:35:15,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1568 states. [2021-12-07 01:35:15,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1568 to 1405. [2021-12-07 01:35:15,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1405 states, 1319 states have (on average 1.3214556482183473) internal successors, (1743), 1352 states have internal predecessors, (1743), 33 states have call successors, (33), 19 states have call predecessors, (33), 52 states have return successors, (419), 33 states have call predecessors, (419), 33 states have call successors, (419) [2021-12-07 01:35:15,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1405 states to 1405 states and 2195 transitions. [2021-12-07 01:35:15,179 INFO L78 Accepts]: Start accepts. Automaton has 1405 states and 2195 transitions. Word has length 91 [2021-12-07 01:35:15,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:35:15,180 INFO L470 AbstractCegarLoop]: Abstraction has 1405 states and 2195 transitions. [2021-12-07 01:35:15,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:35:15,180 INFO L276 IsEmpty]: Start isEmpty. Operand 1405 states and 2195 transitions. [2021-12-07 01:35:15,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-07 01:35:15,189 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:35:15,189 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:35:15,193 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2021-12-07 01:35:15,403 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-12-07 01:35:15,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:35:15,590 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:35:15,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:35:15,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1791202551, now seen corresponding path program 5 times [2021-12-07 01:35:15,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:35:15,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [188868853] [2021-12-07 01:35:15,591 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-07 01:35:15,591 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:35:15,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:35:15,592 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:35:15,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-07 01:35:15,850 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-12-07 01:35:15,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:35:15,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-07 01:35:15,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:35:15,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:35:15,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-12-07 01:35:16,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:35:16,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:35:16,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:35:16,043 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-12-07 01:35:16,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2021-12-07 01:35:16,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:35:16,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:35:16,138 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:35:16,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 44 [2021-12-07 01:35:16,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:35:16,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-12-07 01:35:16,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:35:16,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-07 01:35:16,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:35:16,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-07 01:35:16,481 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 181 proven. 133 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-07 01:35:16,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:35:23,774 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 205 proven. 107 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-12-07 01:35:23,774 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:35:23,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [188868853] [2021-12-07 01:35:23,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [188868853] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:35:23,774 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:35:23,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 34 [2021-12-07 01:35:23,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988443414] [2021-12-07 01:35:23,774 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:35:23,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-07 01:35:23,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:35:23,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-07 01:35:23,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=961, Unknown=3, NotChecked=0, Total=1122 [2021-12-07 01:35:23,776 INFO L87 Difference]: Start difference. First operand 1405 states and 2195 transitions. Second operand has 34 states, 34 states have (on average 2.323529411764706) internal successors, (79), 31 states have internal predecessors, (79), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-07 01:35:25,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:35:25,752 INFO L93 Difference]: Finished difference Result 2314 states and 3920 transitions. [2021-12-07 01:35:25,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-07 01:35:25,753 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.323529411764706) internal successors, (79), 31 states have internal predecessors, (79), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 91 [2021-12-07 01:35:25,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:35:25,767 INFO L225 Difference]: With dead ends: 2314 [2021-12-07 01:35:25,768 INFO L226 Difference]: Without dead ends: 2196 [2021-12-07 01:35:25,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 157 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=358, Invalid=2291, Unknown=3, NotChecked=0, Total=2652 [2021-12-07 01:35:25,773 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 53 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 388 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 01:35:25,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 477 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 246 Invalid, 0 Unknown, 388 Unchecked, 0.5s Time] [2021-12-07 01:35:25,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2196 states. [2021-12-07 01:35:25,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2196 to 2192. [2021-12-07 01:35:25,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2192 states, 2040 states have (on average 1.3088235294117647) internal successors, (2670), 2101 states have internal predecessors, (2670), 56 states have call successors, (56), 35 states have call predecessors, (56), 95 states have return successors, (904), 55 states have call predecessors, (904), 56 states have call successors, (904) [2021-12-07 01:35:25,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2192 states to 2192 states and 3630 transitions. [2021-12-07 01:35:25,940 INFO L78 Accepts]: Start accepts. Automaton has 2192 states and 3630 transitions. Word has length 91 [2021-12-07 01:35:25,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:35:25,941 INFO L470 AbstractCegarLoop]: Abstraction has 2192 states and 3630 transitions. [2021-12-07 01:35:25,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.323529411764706) internal successors, (79), 31 states have internal predecessors, (79), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-07 01:35:25,941 INFO L276 IsEmpty]: Start isEmpty. Operand 2192 states and 3630 transitions. [2021-12-07 01:35:25,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-07 01:35:25,958 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:35:25,958 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:35:25,967 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-12-07 01:35:26,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:35:26,158 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:35:26,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:35:26,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1790257655, now seen corresponding path program 6 times [2021-12-07 01:35:26,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:35:26,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [915303818] [2021-12-07 01:35:26,159 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-07 01:35:26,159 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:35:26,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:35:26,160 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:35:26,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-12-07 01:35:26,286 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-12-07 01:35:26,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:35:26,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-07 01:35:26,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:35:26,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:35:26,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:35:26,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:35:26,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:35:26,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 34 [2021-12-07 01:35:27,611 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 239 proven. 57 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-07 01:35:27,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:35:27,864 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:35:27,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [915303818] [2021-12-07 01:35:27,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [915303818] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:35:27,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1376639070] [2021-12-07 01:35:27,864 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-07 01:35:27,864 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 01:35:27,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 01:35:27,865 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 01:35:27,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-12-07 01:35:28,140 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-12-07 01:35:28,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:35:28,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-07 01:35:28,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:35:28,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-07 01:35:28,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:35:28,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:35:28,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:35:28,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 34 [2021-12-07 01:35:29,031 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 248 proven. 57 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-12-07 01:35:29,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:35:29,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1376639070] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:35:29,267 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:35:29,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 17 [2021-12-07 01:35:29,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718974052] [2021-12-07 01:35:29,267 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:35:29,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-07 01:35:29,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:35:29,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-07 01:35:29,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-12-07 01:35:29,268 INFO L87 Difference]: Start difference. First operand 2192 states and 3630 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:35:31,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:35:31,094 INFO L93 Difference]: Finished difference Result 6451 states and 10387 transitions. [2021-12-07 01:35:31,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-07 01:35:31,096 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 91 [2021-12-07 01:35:31,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:35:31,121 INFO L225 Difference]: With dead ends: 6451 [2021-12-07 01:35:31,121 INFO L226 Difference]: Without dead ends: 5007 [2021-12-07 01:35:31,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 233 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=180, Invalid=1080, Unknown=0, NotChecked=0, Total=1260 [2021-12-07 01:35:31,132 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 27 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:35:31,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 146 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 104 Invalid, 0 Unknown, 143 Unchecked, 0.2s Time] [2021-12-07 01:35:31,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5007 states. [2021-12-07 01:35:31,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5007 to 3722. [2021-12-07 01:35:31,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3722 states, 3452 states have (on average 1.3102549246813442) internal successors, (4523), 3623 states have internal predecessors, (4523), 60 states have call successors, (60), 39 states have call predecessors, (60), 209 states have return successors, (1538), 59 states have call predecessors, (1538), 60 states have call successors, (1538) [2021-12-07 01:35:31,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3722 states to 3722 states and 6121 transitions. [2021-12-07 01:35:31,527 INFO L78 Accepts]: Start accepts. Automaton has 3722 states and 6121 transitions. Word has length 91 [2021-12-07 01:35:31,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:35:31,527 INFO L470 AbstractCegarLoop]: Abstraction has 3722 states and 6121 transitions. [2021-12-07 01:35:31,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:35:31,528 INFO L276 IsEmpty]: Start isEmpty. Operand 3722 states and 6121 transitions. [2021-12-07 01:35:31,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-07 01:35:31,548 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:35:31,548 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:35:31,551 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 0 [2021-12-07 01:35:31,759 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-12-07 01:35:31,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:35:31,950 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:35:31,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:35:31,952 INFO L85 PathProgramCache]: Analyzing trace with hash 31675077, now seen corresponding path program 7 times [2021-12-07 01:35:31,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:35:31,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1818490945] [2021-12-07 01:35:31,953 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-07 01:35:31,953 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:35:31,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:35:31,955 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:35:31,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-12-07 01:35:32,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:35:32,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-07 01:35:32,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:35:32,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:35:32,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:35:32,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-12-07 01:35:32,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:35:32,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-12-07 01:35:32,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:35:32,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:35:32,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:35:32,683 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-12-07 01:35:32,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2021-12-07 01:35:32,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:35:32,819 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:35:32,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 28 [2021-12-07 01:35:32,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:35:32,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-07 01:35:33,235 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 187 proven. 180 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-07 01:35:33,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:35:35,962 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 217 proven. 127 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-07 01:35:35,962 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:35:35,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1818490945] [2021-12-07 01:35:35,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1818490945] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:35:35,962 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:35:35,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 22] total 44 [2021-12-07 01:35:35,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764554979] [2021-12-07 01:35:35,962 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:35:35,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-07 01:35:35,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:35:35,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-07 01:35:35,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1720, Unknown=0, NotChecked=0, Total=1892 [2021-12-07 01:35:35,964 INFO L87 Difference]: Start difference. First operand 3722 states and 6121 transitions. Second operand has 44 states, 44 states have (on average 2.477272727272727) internal successors, (109), 41 states have internal predecessors, (109), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-07 01:35:39,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:35:39,672 INFO L93 Difference]: Finished difference Result 4069 states and 6985 transitions. [2021-12-07 01:35:39,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-07 01:35:39,674 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.477272727272727) internal successors, (109), 41 states have internal predecessors, (109), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 91 [2021-12-07 01:35:39,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:35:39,694 INFO L225 Difference]: With dead ends: 4069 [2021-12-07 01:35:39,694 INFO L226 Difference]: Without dead ends: 3969 [2021-12-07 01:35:39,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 137 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 928 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=353, Invalid=3187, Unknown=0, NotChecked=0, Total=3540 [2021-12-07 01:35:39,702 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 69 mSDsluCounter, 682 mSDsCounter, 0 mSdLazyCounter, 767 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 719 SdHoareTripleChecker+Invalid, 1085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 289 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-07 01:35:39,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 719 Invalid, 1085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 767 Invalid, 0 Unknown, 289 Unchecked, 1.7s Time] [2021-12-07 01:35:39,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3969 states. [2021-12-07 01:35:40,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3969 to 3129. [2021-12-07 01:35:40,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3129 states, 2886 states have (on average 1.3132363132363132) internal successors, (3790), 3051 states have internal predecessors, (3790), 53 states have call successors, (53), 33 states have call predecessors, (53), 189 states have return successors, (1182), 44 states have call predecessors, (1182), 53 states have call successors, (1182) [2021-12-07 01:35:40,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3129 states to 3129 states and 5025 transitions. [2021-12-07 01:35:40,088 INFO L78 Accepts]: Start accepts. Automaton has 3129 states and 5025 transitions. Word has length 91 [2021-12-07 01:35:40,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:35:40,088 INFO L470 AbstractCegarLoop]: Abstraction has 3129 states and 5025 transitions. [2021-12-07 01:35:40,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.477272727272727) internal successors, (109), 41 states have internal predecessors, (109), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-07 01:35:40,089 INFO L276 IsEmpty]: Start isEmpty. Operand 3129 states and 5025 transitions. [2021-12-07 01:35:40,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-07 01:35:40,107 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:35:40,108 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 13, 5, 5, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:35:40,119 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-12-07 01:35:40,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:35:40,309 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:35:40,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:35:40,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1248188601, now seen corresponding path program 8 times [2021-12-07 01:35:40,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:35:40,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1711701739] [2021-12-07 01:35:40,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:35:40,310 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:35:40,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:35:40,311 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:35:40,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-12-07 01:35:40,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 01:35:40,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:35:40,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-07 01:35:40,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:35:40,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:35:40,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:35:40,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:35:40,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:35:40,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2021-12-07 01:35:41,415 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 192 proven. 165 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-12-07 01:35:41,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:35:42,692 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 36 proven. 297 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-12-07 01:35:42,692 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:35:42,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1711701739] [2021-12-07 01:35:42,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1711701739] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:35:42,692 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:35:42,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15] total 32 [2021-12-07 01:35:42,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383796397] [2021-12-07 01:35:42,693 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:35:42,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-07 01:35:42,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:35:42,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-07 01:35:42,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=878, Unknown=0, NotChecked=0, Total=992 [2021-12-07 01:35:42,694 INFO L87 Difference]: Start difference. First operand 3129 states and 5025 transitions. Second operand has 32 states, 32 states have (on average 3.34375) internal successors, (107), 31 states have internal predecessors, (107), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-07 01:35:43,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:35:43,991 INFO L93 Difference]: Finished difference Result 5369 states and 8644 transitions. [2021-12-07 01:35:43,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-07 01:35:43,993 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.34375) internal successors, (107), 31 states have internal predecessors, (107), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Word has length 91 [2021-12-07 01:35:43,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:35:44,011 INFO L225 Difference]: With dead ends: 5369 [2021-12-07 01:35:44,011 INFO L226 Difference]: Without dead ends: 3419 [2021-12-07 01:35:44,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 150 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=177, Invalid=1229, Unknown=0, NotChecked=0, Total=1406 [2021-12-07 01:35:44,029 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 94 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 276 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-07 01:35:44,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 593 Invalid, 835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 530 Invalid, 0 Unknown, 276 Unchecked, 0.9s Time] [2021-12-07 01:35:44,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3419 states. [2021-12-07 01:35:44,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3419 to 3415. [2021-12-07 01:35:44,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3415 states, 3164 states have (on average 1.2989886219974716) internal successors, (4110), 3323 states have internal predecessors, (4110), 61 states have call successors, (61), 39 states have call predecessors, (61), 189 states have return successors, (1405), 52 states have call predecessors, (1405), 61 states have call successors, (1405) [2021-12-07 01:35:44,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3415 states to 3415 states and 5576 transitions. [2021-12-07 01:35:44,289 INFO L78 Accepts]: Start accepts. Automaton has 3415 states and 5576 transitions. Word has length 91 [2021-12-07 01:35:44,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:35:44,290 INFO L470 AbstractCegarLoop]: Abstraction has 3415 states and 5576 transitions. [2021-12-07 01:35:44,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.34375) internal successors, (107), 31 states have internal predecessors, (107), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-07 01:35:44,290 INFO L276 IsEmpty]: Start isEmpty. Operand 3415 states and 5576 transitions. [2021-12-07 01:35:44,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-07 01:35:44,307 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:35:44,307 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:35:44,321 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-12-07 01:35:44,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:35:44,508 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:35:44,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:35:44,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1727974537, now seen corresponding path program 9 times [2021-12-07 01:35:44,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:35:44,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [479257630] [2021-12-07 01:35:44,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 01:35:44,509 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:35:44,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:35:44,510 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:35:44,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-12-07 01:35:44,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-12-07 01:35:44,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:35:44,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-07 01:35:44,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:35:44,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:35:45,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:35:45,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-12-07 01:35:45,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:35:45,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:35:45,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:35:45,171 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-12-07 01:35:45,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2021-12-07 01:35:45,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:35:45,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:35:45,286 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:35:45,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 45 [2021-12-07 01:35:45,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:35:45,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-07 01:35:45,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:35:45,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-07 01:35:45,756 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 184 proven. 165 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-12-07 01:35:45,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:35:47,869 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 217 proven. 114 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-12-07 01:35:47,870 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:35:47,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [479257630] [2021-12-07 01:35:47,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [479257630] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:35:47,870 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:35:47,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 40 [2021-12-07 01:35:47,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40032085] [2021-12-07 01:35:47,870 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:35:47,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-07 01:35:47,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:35:47,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-07 01:35:47,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1384, Unknown=0, NotChecked=0, Total=1560 [2021-12-07 01:35:47,872 INFO L87 Difference]: Start difference. First operand 3415 states and 5576 transitions. Second operand has 40 states, 40 states have (on average 2.375) internal successors, (95), 37 states have internal predecessors, (95), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-07 01:35:50,837 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-07 01:35:53,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:35:53,320 INFO L93 Difference]: Finished difference Result 5646 states and 9281 transitions. [2021-12-07 01:35:53,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-12-07 01:35:53,321 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.375) internal successors, (95), 37 states have internal predecessors, (95), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 91 [2021-12-07 01:35:53,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:35:53,340 INFO L225 Difference]: With dead ends: 5646 [2021-12-07 01:35:53,340 INFO L226 Difference]: Without dead ends: 3679 [2021-12-07 01:35:53,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 149 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1221 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=477, Invalid=3683, Unknown=0, NotChecked=0, Total=4160 [2021-12-07 01:35:53,357 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 92 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 54 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 1212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 520 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:35:53,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 614 Invalid, 1212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 637 Invalid, 1 Unknown, 520 Unchecked, 3.1s Time] [2021-12-07 01:35:53,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3679 states. [2021-12-07 01:35:53,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3679 to 3637. [2021-12-07 01:35:53,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3637 states, 3370 states have (on average 1.2851632047477746) internal successors, (4331), 3516 states have internal predecessors, (4331), 77 states have call successors, (77), 55 states have call predecessors, (77), 189 states have return successors, (1353), 65 states have call predecessors, (1353), 77 states have call successors, (1353) [2021-12-07 01:35:53,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3637 states to 3637 states and 5761 transitions. [2021-12-07 01:35:53,596 INFO L78 Accepts]: Start accepts. Automaton has 3637 states and 5761 transitions. Word has length 91 [2021-12-07 01:35:53,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:35:53,596 INFO L470 AbstractCegarLoop]: Abstraction has 3637 states and 5761 transitions. [2021-12-07 01:35:53,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.375) internal successors, (95), 37 states have internal predecessors, (95), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-07 01:35:53,597 INFO L276 IsEmpty]: Start isEmpty. Operand 3637 states and 5761 transitions. [2021-12-07 01:35:53,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-07 01:35:53,605 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:35:53,605 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 13, 5, 5, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:35:53,614 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-12-07 01:35:53,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:35:53,806 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:35:53,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:35:53,807 INFO L85 PathProgramCache]: Analyzing trace with hash -266170169, now seen corresponding path program 10 times [2021-12-07 01:35:53,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:35:53,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1003544036] [2021-12-07 01:35:53,809 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 01:35:53,809 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:35:53,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:35:53,811 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:35:53,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-12-07 01:35:54,058 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 01:35:54,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:35:54,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-07 01:35:54,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:35:54,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:35:54,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:35:54,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:35:54,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:35:54,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2021-12-07 01:35:54,649 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 189 proven. 153 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-12-07 01:35:54,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:35:55,627 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 42 proven. 281 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-12-07 01:35:55,627 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:35:55,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1003544036] [2021-12-07 01:35:55,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1003544036] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:35:55,627 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:35:55,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 27 [2021-12-07 01:35:55,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225446342] [2021-12-07 01:35:55,627 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:35:55,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-07 01:35:55,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:35:55,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-07 01:35:55,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2021-12-07 01:35:55,628 INFO L87 Difference]: Start difference. First operand 3637 states and 5761 transitions. Second operand has 27 states, 27 states have (on average 3.4444444444444446) internal successors, (93), 26 states have internal predecessors, (93), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-07 01:35:56,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:35:56,556 INFO L93 Difference]: Finished difference Result 4905 states and 7636 transitions. [2021-12-07 01:35:56,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-07 01:35:56,557 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.4444444444444446) internal successors, (93), 26 states have internal predecessors, (93), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Word has length 91 [2021-12-07 01:35:56,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:35:56,574 INFO L225 Difference]: With dead ends: 4905 [2021-12-07 01:35:56,574 INFO L226 Difference]: Without dead ends: 3138 [2021-12-07 01:35:56,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 154 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=150, Invalid=906, Unknown=0, NotChecked=0, Total=1056 [2021-12-07 01:35:56,582 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 73 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 211 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 01:35:56,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 448 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 363 Invalid, 0 Unknown, 211 Unchecked, 0.5s Time] [2021-12-07 01:35:56,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3138 states. [2021-12-07 01:35:56,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3138 to 3134. [2021-12-07 01:35:56,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3134 states, 2910 states have (on average 1.2707903780068728) internal successors, (3698), 3013 states have internal predecessors, (3698), 77 states have call successors, (77), 55 states have call predecessors, (77), 146 states have return successors, (1247), 65 states have call predecessors, (1247), 77 states have call successors, (1247) [2021-12-07 01:35:56,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3134 states to 3134 states and 5022 transitions. [2021-12-07 01:35:56,821 INFO L78 Accepts]: Start accepts. Automaton has 3134 states and 5022 transitions. Word has length 91 [2021-12-07 01:35:56,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:35:56,821 INFO L470 AbstractCegarLoop]: Abstraction has 3134 states and 5022 transitions. [2021-12-07 01:35:56,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.4444444444444446) internal successors, (93), 26 states have internal predecessors, (93), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-07 01:35:56,821 INFO L276 IsEmpty]: Start isEmpty. Operand 3134 states and 5022 transitions. [2021-12-07 01:35:56,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-07 01:35:56,829 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:35:56,829 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:35:56,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-12-07 01:35:57,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:35:57,030 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:35:57,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:35:57,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1599982661, now seen corresponding path program 11 times [2021-12-07 01:35:57,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:35:57,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [932367194] [2021-12-07 01:35:57,033 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-07 01:35:57,034 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:35:57,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:35:57,036 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:35:57,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-12-07 01:35:57,458 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-12-07 01:35:57,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:35:57,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-07 01:35:57,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:35:57,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:35:57,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-12-07 01:35:57,865 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 182 proven. 117 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-12-07 01:35:57,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:35:58,330 INFO L354 Elim1Store]: treesize reduction 4, result has 73.3 percent of original size [2021-12-07 01:35:58,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-12-07 01:36:00,387 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 22 proven. 274 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-07 01:36:00,387 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:36:00,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [932367194] [2021-12-07 01:36:00,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [932367194] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:36:00,387 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:36:00,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-12-07 01:36:00,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102316763] [2021-12-07 01:36:00,388 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:36:00,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-07 01:36:00,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:36:00,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-07 01:36:00,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=355, Unknown=1, NotChecked=0, Total=420 [2021-12-07 01:36:00,389 INFO L87 Difference]: Start difference. First operand 3134 states and 5022 transitions. Second operand has 21 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 18 states have internal predecessors, (69), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-07 01:36:01,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:36:01,415 INFO L93 Difference]: Finished difference Result 4743 states and 7777 transitions. [2021-12-07 01:36:01,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-07 01:36:01,417 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 18 states have internal predecessors, (69), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Word has length 91 [2021-12-07 01:36:01,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:36:01,430 INFO L225 Difference]: With dead ends: 4743 [2021-12-07 01:36:01,430 INFO L226 Difference]: Without dead ends: 3226 [2021-12-07 01:36:01,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=175, Invalid=880, Unknown=1, NotChecked=0, Total=1056 [2021-12-07 01:36:01,442 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 61 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 153 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:36:01,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 299 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 295 Invalid, 0 Unknown, 153 Unchecked, 0.4s Time] [2021-12-07 01:36:01,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3226 states. [2021-12-07 01:36:01,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3226 to 3069. [2021-12-07 01:36:01,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3069 states, 2842 states have (on average 1.2642505277973257) internal successors, (3593), 2928 states have internal predecessors, (3593), 84 states have call successors, (84), 67 states have call predecessors, (84), 142 states have return successors, (1302), 73 states have call predecessors, (1302), 84 states have call successors, (1302) [2021-12-07 01:36:01,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3069 states to 3069 states and 4979 transitions. [2021-12-07 01:36:01,646 INFO L78 Accepts]: Start accepts. Automaton has 3069 states and 4979 transitions. Word has length 91 [2021-12-07 01:36:01,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:36:01,646 INFO L470 AbstractCegarLoop]: Abstraction has 3069 states and 4979 transitions. [2021-12-07 01:36:01,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 18 states have internal predecessors, (69), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-07 01:36:01,646 INFO L276 IsEmpty]: Start isEmpty. Operand 3069 states and 4979 transitions. [2021-12-07 01:36:01,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-07 01:36:01,661 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:36:01,661 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:36:01,670 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-12-07 01:36:01,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:36:01,862 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:36:01,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:36:01,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1770003703, now seen corresponding path program 12 times [2021-12-07 01:36:01,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:36:01,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [18825770] [2021-12-07 01:36:01,862 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-07 01:36:01,863 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:36:01,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:36:01,863 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:36:01,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-12-07 01:36:02,017 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-12-07 01:36:02,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:36:02,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-07 01:36:02,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:36:02,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-12-07 01:36:02,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-07 01:36:02,611 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 180 proven. 111 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2021-12-07 01:36:02,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:36:02,793 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:36:02,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [18825770] [2021-12-07 01:36:02,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [18825770] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:36:02,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [804575058] [2021-12-07 01:36:02,793 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-07 01:36:02,793 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 01:36:02,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 01:36:02,794 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 01:36:02,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-12-07 01:36:03,101 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-12-07 01:36:03,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:36:03,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-07 01:36:03,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:36:03,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:36:03,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-12-07 01:36:03,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-12-07 01:36:03,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-07 01:36:03,515 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 187 proven. 111 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-12-07 01:36:03,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:36:03,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [804575058] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:36:03,684 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:36:03,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 17 [2021-12-07 01:36:03,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175360951] [2021-12-07 01:36:03,684 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:36:03,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-07 01:36:03,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:36:03,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-07 01:36:03,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-12-07 01:36:03,685 INFO L87 Difference]: Start difference. First operand 3069 states and 4979 transitions. Second operand has 17 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-07 01:36:04,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:36:04,847 INFO L93 Difference]: Finished difference Result 3139 states and 5068 transitions. [2021-12-07 01:36:04,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-07 01:36:04,847 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 91 [2021-12-07 01:36:04,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:36:04,860 INFO L225 Difference]: With dead ends: 3139 [2021-12-07 01:36:04,860 INFO L226 Difference]: Without dead ends: 3129 [2021-12-07 01:36:04,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 170 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=129, Invalid=801, Unknown=0, NotChecked=0, Total=930 [2021-12-07 01:36:04,864 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 30 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:36:04,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 202 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 159 Invalid, 0 Unknown, 64 Unchecked, 0.2s Time] [2021-12-07 01:36:04,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3129 states. [2021-12-07 01:36:05,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3129 to 3090. [2021-12-07 01:36:05,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3090 states, 2863 states have (on average 1.2647572476423332) internal successors, (3621), 2948 states have internal predecessors, (3621), 84 states have call successors, (84), 68 states have call predecessors, (84), 142 states have return successors, (1302), 73 states have call predecessors, (1302), 84 states have call successors, (1302) [2021-12-07 01:36:05,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3090 states to 3090 states and 5007 transitions. [2021-12-07 01:36:05,091 INFO L78 Accepts]: Start accepts. Automaton has 3090 states and 5007 transitions. Word has length 91 [2021-12-07 01:36:05,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:36:05,092 INFO L470 AbstractCegarLoop]: Abstraction has 3090 states and 5007 transitions. [2021-12-07 01:36:05,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-07 01:36:05,092 INFO L276 IsEmpty]: Start isEmpty. Operand 3090 states and 5007 transitions. [2021-12-07 01:36:05,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-07 01:36:05,104 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:36:05,105 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 13, 5, 5, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:36:05,107 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (27)] Ended with exit code 0 [2021-12-07 01:36:05,319 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2021-12-07 01:36:05,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:36:05,506 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:36:05,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:36:05,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1089945333, now seen corresponding path program 13 times [2021-12-07 01:36:05,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:36:05,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2020100280] [2021-12-07 01:36:05,509 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-07 01:36:05,509 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:36:05,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:36:05,511 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:36:05,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-12-07 01:36:05,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:36:05,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-07 01:36:05,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:36:06,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:36:06,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-12-07 01:36:06,293 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 182 proven. 126 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-12-07 01:36:06,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:36:06,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 30 [2021-12-07 01:36:06,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2021-12-07 01:36:06,691 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-12-07 01:36:06,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-07 01:36:06,834 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 12 proven. 284 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-07 01:36:06,834 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:36:06,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2020100280] [2021-12-07 01:36:06,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2020100280] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:36:06,835 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:36:06,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-12-07 01:36:06,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194063684] [2021-12-07 01:36:06,835 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:36:06,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-07 01:36:06,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:36:06,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-07 01:36:06,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-12-07 01:36:06,836 INFO L87 Difference]: Start difference. First operand 3090 states and 5007 transitions. Second operand has 22 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-07 01:36:08,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:36:08,190 INFO L93 Difference]: Finished difference Result 4870 states and 8067 transitions. [2021-12-07 01:36:08,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-07 01:36:08,191 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Word has length 91 [2021-12-07 01:36:08,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:36:08,206 INFO L225 Difference]: With dead ends: 4870 [2021-12-07 01:36:08,206 INFO L226 Difference]: Without dead ends: 3292 [2021-12-07 01:36:08,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 161 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=196, Invalid=1136, Unknown=0, NotChecked=0, Total=1332 [2021-12-07 01:36:08,212 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 71 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 177 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 01:36:08,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 292 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 345 Invalid, 0 Unknown, 177 Unchecked, 0.5s Time] [2021-12-07 01:36:08,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3292 states. [2021-12-07 01:36:08,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3292 to 3211. [2021-12-07 01:36:08,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3211 states, 2958 states have (on average 1.2562542258282623) internal successors, (3716), 3020 states have internal predecessors, (3716), 110 states have call successors, (110), 91 states have call predecessors, (110), 142 states have return successors, (1557), 99 states have call predecessors, (1557), 110 states have call successors, (1557) [2021-12-07 01:36:08,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3211 states to 3211 states and 5383 transitions. [2021-12-07 01:36:08,479 INFO L78 Accepts]: Start accepts. Automaton has 3211 states and 5383 transitions. Word has length 91 [2021-12-07 01:36:08,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:36:08,479 INFO L470 AbstractCegarLoop]: Abstraction has 3211 states and 5383 transitions. [2021-12-07 01:36:08,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-07 01:36:08,479 INFO L276 IsEmpty]: Start isEmpty. Operand 3211 states and 5383 transitions. [2021-12-07 01:36:08,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-07 01:36:08,489 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:36:08,489 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:36:08,499 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2021-12-07 01:36:08,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:36:08,690 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:36:08,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:36:08,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1663666313, now seen corresponding path program 14 times [2021-12-07 01:36:08,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:36:08,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1551254312] [2021-12-07 01:36:08,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:36:08,691 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:36:08,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:36:08,691 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:36:08,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-12-07 01:36:08,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 01:36:08,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:36:08,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-07 01:36:08,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:36:08,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:36:09,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:36:09,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:36:09,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:36:09,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 32 [2021-12-07 01:36:09,724 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 195 proven. 169 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-07 01:36:09,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:36:11,435 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 18 proven. 319 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-12-07 01:36:11,435 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:36:11,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1551254312] [2021-12-07 01:36:11,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1551254312] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:36:11,435 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:36:11,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 17] total 37 [2021-12-07 01:36:11,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370331347] [2021-12-07 01:36:11,435 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:36:11,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-07 01:36:11,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:36:11,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-07 01:36:11,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1198, Unknown=0, NotChecked=0, Total=1332 [2021-12-07 01:36:11,437 INFO L87 Difference]: Start difference. First operand 3211 states and 5383 transitions. Second operand has 37 states, 37 states have (on average 3.054054054054054) internal successors, (113), 36 states have internal predecessors, (113), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-07 01:36:13,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:36:13,265 INFO L93 Difference]: Finished difference Result 5820 states and 9399 transitions. [2021-12-07 01:36:13,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-07 01:36:13,266 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.054054054054054) internal successors, (113), 36 states have internal predecessors, (113), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Word has length 91 [2021-12-07 01:36:13,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:36:13,281 INFO L225 Difference]: With dead ends: 5820 [2021-12-07 01:36:13,281 INFO L226 Difference]: Without dead ends: 3598 [2021-12-07 01:36:13,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=201, Invalid=1605, Unknown=0, NotChecked=0, Total=1806 [2021-12-07 01:36:13,294 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 96 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 1007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 184 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:36:13,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 640 Invalid, 1007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 799 Invalid, 0 Unknown, 184 Unchecked, 1.3s Time] [2021-12-07 01:36:13,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3598 states. [2021-12-07 01:36:13,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3598 to 3491. [2021-12-07 01:36:13,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3491 states, 3222 states have (on average 1.2386716325263811) internal successors, (3991), 3262 states have internal predecessors, (3991), 130 states have call successors, (130), 109 states have call predecessors, (130), 138 states have return successors, (1486), 119 states have call predecessors, (1486), 130 states have call successors, (1486) [2021-12-07 01:36:13,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3491 states to 3491 states and 5607 transitions. [2021-12-07 01:36:13,589 INFO L78 Accepts]: Start accepts. Automaton has 3491 states and 5607 transitions. Word has length 91 [2021-12-07 01:36:13,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:36:13,589 INFO L470 AbstractCegarLoop]: Abstraction has 3491 states and 5607 transitions. [2021-12-07 01:36:13,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.054054054054054) internal successors, (113), 36 states have internal predecessors, (113), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-07 01:36:13,589 INFO L276 IsEmpty]: Start isEmpty. Operand 3491 states and 5607 transitions. [2021-12-07 01:36:13,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-07 01:36:13,599 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:36:13,600 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 13, 5, 5, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:36:13,609 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-12-07 01:36:13,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:36:13,801 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:36:13,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:36:13,802 INFO L85 PathProgramCache]: Analyzing trace with hash 2087313035, now seen corresponding path program 15 times [2021-12-07 01:36:13,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:36:13,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [205063703] [2021-12-07 01:36:13,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 01:36:13,804 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:36:13,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:36:13,806 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:36:13,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-12-07 01:36:14,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-12-07 01:36:14,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:36:14,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-07 01:36:14,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:36:14,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:36:14,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:36:14,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-12-07 01:36:14,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:36:14,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-12-07 01:36:14,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:36:14,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-12-07 01:36:14,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:36:14,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 25 [2021-12-07 01:36:14,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:36:14,713 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:36:14,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 28 [2021-12-07 01:36:15,150 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 190 proven. 163 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-07 01:36:15,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:36:18,294 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 205 proven. 146 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-12-07 01:36:18,294 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:36:18,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [205063703] [2021-12-07 01:36:18,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [205063703] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:36:18,294 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:36:18,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 45 [2021-12-07 01:36:18,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266534127] [2021-12-07 01:36:18,294 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:36:18,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-07 01:36:18,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:36:18,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-07 01:36:18,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1796, Unknown=0, NotChecked=0, Total=1980 [2021-12-07 01:36:18,296 INFO L87 Difference]: Start difference. First operand 3491 states and 5607 transitions. Second operand has 45 states, 44 states have (on average 2.590909090909091) internal successors, (114), 42 states have internal predecessors, (114), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-07 01:36:40,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:36:40,926 INFO L93 Difference]: Finished difference Result 9713 states and 17880 transitions. [2021-12-07 01:36:40,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-12-07 01:36:40,926 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 2.590909090909091) internal successors, (114), 42 states have internal predecessors, (114), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 91 [2021-12-07 01:36:40,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:36:40,959 INFO L225 Difference]: With dead ends: 9713 [2021-12-07 01:36:40,960 INFO L226 Difference]: Without dead ends: 7292 [2021-12-07 01:36:40,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 167 SyntacticMatches, 3 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3325 ImplicationChecksByTransitivity, 22.8s TimeCoverageRelationStatistics Valid=1482, Invalid=9854, Unknown=6, NotChecked=0, Total=11342 [2021-12-07 01:36:40,978 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 239 mSDsluCounter, 1020 mSDsCounter, 0 mSdLazyCounter, 1181 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 1077 SdHoareTripleChecker+Invalid, 2353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 1181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1035 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-07 01:36:40,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 1077 Invalid, 2353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 1181 Invalid, 0 Unknown, 1035 Unchecked, 2.6s Time] [2021-12-07 01:36:40,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7292 states. [2021-12-07 01:36:41,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7292 to 5372. [2021-12-07 01:36:41,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5372 states, 4983 states have (on average 1.2927955047160344) internal successors, (6442), 5098 states have internal predecessors, (6442), 158 states have call successors, (158), 133 states have call predecessors, (158), 230 states have return successors, (2286), 140 states have call predecessors, (2286), 158 states have call successors, (2286) [2021-12-07 01:36:41,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5372 states to 5372 states and 8886 transitions. [2021-12-07 01:36:41,597 INFO L78 Accepts]: Start accepts. Automaton has 5372 states and 8886 transitions. Word has length 91 [2021-12-07 01:36:41,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:36:41,597 INFO L470 AbstractCegarLoop]: Abstraction has 5372 states and 8886 transitions. [2021-12-07 01:36:41,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 2.590909090909091) internal successors, (114), 42 states have internal predecessors, (114), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-07 01:36:41,597 INFO L276 IsEmpty]: Start isEmpty. Operand 5372 states and 8886 transitions. [2021-12-07 01:36:41,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-07 01:36:41,610 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:36:41,610 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 12, 5, 5, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:36:41,620 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2021-12-07 01:36:41,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:36:41,811 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:36:41,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:36:41,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1949488823, now seen corresponding path program 16 times [2021-12-07 01:36:41,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:36:41,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [280961320] [2021-12-07 01:36:41,811 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 01:36:41,811 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:36:41,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:36:41,812 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:36:41,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-12-07 01:36:41,966 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 01:36:41,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:36:41,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-07 01:36:41,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:36:42,201 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 294 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2021-12-07 01:36:42,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:36:42,579 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 294 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2021-12-07 01:36:42,579 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:36:42,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [280961320] [2021-12-07 01:36:42,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [280961320] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:36:42,580 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:36:42,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-12-07 01:36:42,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404044104] [2021-12-07 01:36:42,580 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:36:42,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-07 01:36:42,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:36:42,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-07 01:36:42,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-12-07 01:36:42,581 INFO L87 Difference]: Start difference. First operand 5372 states and 8886 transitions. Second operand has 21 states, 20 states have (on average 2.65) internal successors, (53), 17 states have internal predecessors, (53), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-07 01:36:43,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:36:43,183 INFO L93 Difference]: Finished difference Result 7221 states and 15178 transitions. [2021-12-07 01:36:43,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-07 01:36:43,184 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.65) internal successors, (53), 17 states have internal predecessors, (53), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 91 [2021-12-07 01:36:43,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:36:43,218 INFO L225 Difference]: With dead ends: 7221 [2021-12-07 01:36:43,218 INFO L226 Difference]: Without dead ends: 7217 [2021-12-07 01:36:43,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-12-07 01:36:43,226 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 35 mSDsluCounter, 953 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 1039 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:36:43,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 1039 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-07 01:36:43,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7217 states. [2021-12-07 01:36:44,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7217 to 6204. [2021-12-07 01:36:44,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6204 states, 5743 states have (on average 1.3083754135469268) internal successors, (7514), 5902 states have internal predecessors, (7514), 186 states have call successors, (186), 133 states have call predecessors, (186), 274 states have return successors, (3223), 168 states have call predecessors, (3223), 186 states have call successors, (3223) [2021-12-07 01:36:44,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6204 states to 6204 states and 10923 transitions. [2021-12-07 01:36:44,827 INFO L78 Accepts]: Start accepts. Automaton has 6204 states and 10923 transitions. Word has length 91 [2021-12-07 01:36:44,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:36:44,827 INFO L470 AbstractCegarLoop]: Abstraction has 6204 states and 10923 transitions. [2021-12-07 01:36:44,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.65) internal successors, (53), 17 states have internal predecessors, (53), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-07 01:36:44,827 INFO L276 IsEmpty]: Start isEmpty. Operand 6204 states and 10923 transitions. [2021-12-07 01:36:44,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-07 01:36:44,850 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:36:44,851 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 11, 5, 5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:36:44,859 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2021-12-07 01:36:45,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:36:45,051 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:36:45,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:36:45,051 INFO L85 PathProgramCache]: Analyzing trace with hash 351333767, now seen corresponding path program 17 times [2021-12-07 01:36:45,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:36:45,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1620357347] [2021-12-07 01:36:45,052 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-07 01:36:45,052 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:36:45,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:36:45,053 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:36:45,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-12-07 01:36:45,391 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-12-07 01:36:45,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:36:45,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-07 01:36:45,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:36:45,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:36:45,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:36:45,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2021-12-07 01:36:45,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:36:45,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:36:45,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:36:45,765 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-12-07 01:36:45,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2021-12-07 01:36:45,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-07 01:36:45,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:36:45,873 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-07 01:36:45,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 38 [2021-12-07 01:36:45,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:36:45,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-12-07 01:36:45,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:36:45,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-12-07 01:36:46,290 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 101 proven. 264 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-07 01:36:46,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:37:01,678 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 217 proven. 114 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-12-07 01:37:01,678 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:37:01,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1620357347] [2021-12-07 01:37:01,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1620357347] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:37:01,678 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:37:01,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 20] total 42 [2021-12-07 01:37:01,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549828859] [2021-12-07 01:37:01,679 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:37:01,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-07 01:37:01,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:37:01,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-07 01:37:01,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1525, Unknown=7, NotChecked=0, Total=1722 [2021-12-07 01:37:01,680 INFO L87 Difference]: Start difference. First operand 6204 states and 10923 transitions. Second operand has 42 states, 42 states have (on average 2.5238095238095237) internal successors, (106), 39 states have internal predecessors, (106), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-07 01:37:03,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:37:03,675 INFO L93 Difference]: Finished difference Result 6975 states and 12037 transitions. [2021-12-07 01:37:03,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-07 01:37:03,677 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.5238095238095237) internal successors, (106), 39 states have internal predecessors, (106), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 91 [2021-12-07 01:37:03,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:37:03,701 INFO L225 Difference]: With dead ends: 6975 [2021-12-07 01:37:03,701 INFO L226 Difference]: Without dead ends: 6237 [2021-12-07 01:37:03,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 145 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=394, Invalid=2905, Unknown=7, NotChecked=0, Total=3306 [2021-12-07 01:37:03,718 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 61 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 278 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-07 01:37:03,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 530 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 356 Invalid, 0 Unknown, 278 Unchecked, 0.6s Time] [2021-12-07 01:37:03,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6237 states. [2021-12-07 01:37:04,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6237 to 6120. [2021-12-07 01:37:04,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6120 states, 5665 states have (on average 1.3067961165048543) internal successors, (7403), 5822 states have internal predecessors, (7403), 188 states have call successors, (188), 133 states have call predecessors, (188), 266 states have return successors, (2724), 164 states have call predecessors, (2724), 188 states have call successors, (2724) [2021-12-07 01:37:04,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6120 states to 6120 states and 10315 transitions. [2021-12-07 01:37:04,612 INFO L78 Accepts]: Start accepts. Automaton has 6120 states and 10315 transitions. Word has length 91 [2021-12-07 01:37:04,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:37:04,612 INFO L470 AbstractCegarLoop]: Abstraction has 6120 states and 10315 transitions. [2021-12-07 01:37:04,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.5238095238095237) internal successors, (106), 39 states have internal predecessors, (106), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-07 01:37:04,613 INFO L276 IsEmpty]: Start isEmpty. Operand 6120 states and 10315 transitions. [2021-12-07 01:37:04,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-07 01:37:04,630 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:37:04,630 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:37:04,639 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2021-12-07 01:37:04,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:37:04,830 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:37:04,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:37:04,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1349095493, now seen corresponding path program 18 times [2021-12-07 01:37:04,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:37:04,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [863652670] [2021-12-07 01:37:04,831 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-07 01:37:04,831 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:37:04,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:37:04,832 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:37:04,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-12-07 01:37:05,023 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-12-07 01:37:05,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:37:05,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-07 01:37:05,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:37:05,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:37:05,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:37:05,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:37:05,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 35 [2021-12-07 01:37:06,745 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 216 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-07 01:37:06,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:37:07,005 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:37:07,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [863652670] [2021-12-07 01:37:07,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [863652670] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:37:07,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1734202360] [2021-12-07 01:37:07,005 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-07 01:37:07,005 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 01:37:07,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 01:37:07,006 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 01:37:07,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2021-12-07 01:37:07,444 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-12-07 01:37:07,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:37:07,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-07 01:37:07,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:37:07,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-07 01:37:07,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-07 01:37:07,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:37:07,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:37:07,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:37:07,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 35 [2021-12-07 01:37:08,516 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 225 proven. 100 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-07 01:37:08,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:37:08,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1734202360] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:37:08,779 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:37:08,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 21 [2021-12-07 01:37:08,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313189090] [2021-12-07 01:37:08,779 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:37:08,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-07 01:37:08,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:37:08,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-07 01:37:08,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-12-07 01:37:08,780 INFO L87 Difference]: Start difference. First operand 6120 states and 10315 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:37:10,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:37:10,692 INFO L93 Difference]: Finished difference Result 7829 states and 13407 transitions. [2021-12-07 01:37:10,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-07 01:37:10,694 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 91 [2021-12-07 01:37:10,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:37:10,724 INFO L225 Difference]: With dead ends: 7829 [2021-12-07 01:37:10,724 INFO L226 Difference]: Without dead ends: 6598 [2021-12-07 01:37:10,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 228 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=128, Invalid=864, Unknown=0, NotChecked=0, Total=992 [2021-12-07 01:37:10,735 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 34 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 303 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:37:10,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 366 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 225 Invalid, 0 Unknown, 303 Unchecked, 0.4s Time] [2021-12-07 01:37:10,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6598 states. [2021-12-07 01:37:11,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6598 to 6230. [2021-12-07 01:37:11,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6230 states, 5769 states have (on average 1.3055988906222915) internal successors, (7532), 5927 states have internal predecessors, (7532), 190 states have call successors, (190), 136 states have call predecessors, (190), 270 states have return successors, (2789), 166 states have call predecessors, (2789), 190 states have call successors, (2789) [2021-12-07 01:37:11,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6230 states to 6230 states and 10511 transitions. [2021-12-07 01:37:11,724 INFO L78 Accepts]: Start accepts. Automaton has 6230 states and 10511 transitions. Word has length 91 [2021-12-07 01:37:11,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:37:11,724 INFO L470 AbstractCegarLoop]: Abstraction has 6230 states and 10511 transitions. [2021-12-07 01:37:11,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:37:11,724 INFO L276 IsEmpty]: Start isEmpty. Operand 6230 states and 10511 transitions. [2021-12-07 01:37:11,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-07 01:37:11,741 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:37:11,741 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 11, 5, 5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:37:11,744 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (34)] Ended with exit code 0 [2021-12-07 01:37:11,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-12-07 01:37:12,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:37:12,143 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:37:12,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:37:12,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1613511047, now seen corresponding path program 19 times [2021-12-07 01:37:12,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:37:12,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1640951357] [2021-12-07 01:37:12,146 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-07 01:37:12,146 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:37:12,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:37:12,148 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:37:12,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-12-07 01:37:12,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:37:12,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-07 01:37:12,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:37:12,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 01:37:12,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:37:12,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:37:12,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:37:12,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 32 [2021-12-07 01:37:13,125 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 192 proven. 165 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-12-07 01:37:13,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:37:14,434 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 36 proven. 297 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-12-07 01:37:14,434 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:37:14,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1640951357] [2021-12-07 01:37:14,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1640951357] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:37:14,434 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:37:14,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15] total 32 [2021-12-07 01:37:14,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549240253] [2021-12-07 01:37:14,434 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:37:14,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-07 01:37:14,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:37:14,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-07 01:37:14,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=878, Unknown=0, NotChecked=0, Total=992 [2021-12-07 01:37:14,435 INFO L87 Difference]: Start difference. First operand 6230 states and 10511 transitions. Second operand has 32 states, 32 states have (on average 3.34375) internal successors, (107), 31 states have internal predecessors, (107), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-07 01:37:15,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:37:15,998 INFO L93 Difference]: Finished difference Result 10062 states and 16462 transitions. [2021-12-07 01:37:15,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-07 01:37:15,999 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.34375) internal successors, (107), 31 states have internal predecessors, (107), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Word has length 91 [2021-12-07 01:37:15,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:37:16,020 INFO L225 Difference]: With dead ends: 10062 [2021-12-07 01:37:16,021 INFO L226 Difference]: Without dead ends: 6230 [2021-12-07 01:37:16,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 149 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=159, Invalid=1173, Unknown=0, NotChecked=0, Total=1332 [2021-12-07 01:37:16,035 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 74 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 201 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-07 01:37:16,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 541 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 436 Invalid, 0 Unknown, 201 Unchecked, 0.9s Time] [2021-12-07 01:37:16,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6230 states. [2021-12-07 01:37:16,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6230 to 6131. [2021-12-07 01:37:16,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6131 states, 5675 states have (on average 1.3030837004405287) internal successors, (7395), 5834 states have internal predecessors, (7395), 187 states have call successors, (187), 133 states have call predecessors, (187), 268 states have return successors, (2403), 163 states have call predecessors, (2403), 187 states have call successors, (2403) [2021-12-07 01:37:16,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6131 states to 6131 states and 9985 transitions. [2021-12-07 01:37:16,982 INFO L78 Accepts]: Start accepts. Automaton has 6131 states and 9985 transitions. Word has length 91 [2021-12-07 01:37:16,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:37:16,983 INFO L470 AbstractCegarLoop]: Abstraction has 6131 states and 9985 transitions. [2021-12-07 01:37:16,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.34375) internal successors, (107), 31 states have internal predecessors, (107), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-07 01:37:16,983 INFO L276 IsEmpty]: Start isEmpty. Operand 6131 states and 9985 transitions. [2021-12-07 01:37:17,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-07 01:37:17,001 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:37:17,002 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 9, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:37:17,011 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (35)] Ended with exit code 0 [2021-12-07 01:37:17,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:37:17,203 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:37:17,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:37:17,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1715740473, now seen corresponding path program 20 times [2021-12-07 01:37:17,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:37:17,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [359054698] [2021-12-07 01:37:17,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:37:17,207 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:37:17,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:37:17,209 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:37:17,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-12-07 01:37:17,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 01:37:17,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:37:17,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-07 01:37:17,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:37:17,584 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 270 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2021-12-07 01:37:17,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:37:17,953 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 270 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2021-12-07 01:37:17,953 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:37:17,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [359054698] [2021-12-07 01:37:17,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [359054698] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:37:17,953 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:37:17,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-12-07 01:37:17,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574189314] [2021-12-07 01:37:17,953 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:37:17,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-07 01:37:17,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:37:17,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-07 01:37:17,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-12-07 01:37:17,954 INFO L87 Difference]: Start difference. First operand 6131 states and 9985 transitions. Second operand has 19 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 15 states have internal predecessors, (51), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-07 01:37:18,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:37:18,477 INFO L93 Difference]: Finished difference Result 7228 states and 13399 transitions. [2021-12-07 01:37:18,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-07 01:37:18,478 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 15 states have internal predecessors, (51), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 91 [2021-12-07 01:37:18,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:37:18,510 INFO L225 Difference]: With dead ends: 7228 [2021-12-07 01:37:18,511 INFO L226 Difference]: Without dead ends: 7224 [2021-12-07 01:37:18,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 162 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-12-07 01:37:18,521 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 33 mSDsluCounter, 746 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 826 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:37:18,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 826 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 01:37:18,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7224 states. [2021-12-07 01:37:19,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7224 to 6485. [2021-12-07 01:37:19,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6485 states, 5995 states have (on average 1.307256046705588) internal successors, (7837), 6175 states have internal predecessors, (7837), 199 states have call successors, (199), 133 states have call predecessors, (199), 290 states have return successors, (2929), 176 states have call predecessors, (2929), 199 states have call successors, (2929) [2021-12-07 01:37:19,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6485 states to 6485 states and 10965 transitions. [2021-12-07 01:37:19,714 INFO L78 Accepts]: Start accepts. Automaton has 6485 states and 10965 transitions. Word has length 91 [2021-12-07 01:37:19,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:37:19,714 INFO L470 AbstractCegarLoop]: Abstraction has 6485 states and 10965 transitions. [2021-12-07 01:37:19,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 15 states have internal predecessors, (51), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-07 01:37:19,714 INFO L276 IsEmpty]: Start isEmpty. Operand 6485 states and 10965 transitions. [2021-12-07 01:37:19,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-07 01:37:19,730 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:37:19,730 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 9, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:37:19,738 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (36)] Ended with exit code 0 [2021-12-07 01:37:19,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:37:19,931 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:37:19,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:37:19,932 INFO L85 PathProgramCache]: Analyzing trace with hash -525047993, now seen corresponding path program 21 times [2021-12-07 01:37:19,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:37:19,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [92177077] [2021-12-07 01:37:19,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 01:37:19,934 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:37:19,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:37:19,936 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:37:19,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-12-07 01:37:20,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-12-07 01:37:20,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:37:20,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-07 01:37:20,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:37:20,522 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 246 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2021-12-07 01:37:20,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:37:20,855 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 246 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2021-12-07 01:37:20,855 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:37:20,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [92177077] [2021-12-07 01:37:20,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [92177077] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:37:20,856 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:37:20,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-12-07 01:37:20,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906638104] [2021-12-07 01:37:20,856 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:37:20,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-07 01:37:20,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:37:20,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-07 01:37:20,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-12-07 01:37:20,857 INFO L87 Difference]: Start difference. First operand 6485 states and 10965 transitions. Second operand has 19 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 15 states have internal predecessors, (51), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-07 01:37:21,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:37:21,451 INFO L93 Difference]: Finished difference Result 8674 states and 17910 transitions. [2021-12-07 01:37:21,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-07 01:37:21,452 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 15 states have internal predecessors, (51), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 91 [2021-12-07 01:37:21,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:37:21,505 INFO L225 Difference]: With dead ends: 8674 [2021-12-07 01:37:21,505 INFO L226 Difference]: Without dead ends: 8670 [2021-12-07 01:37:21,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 162 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-12-07 01:37:21,524 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 27 mSDsluCounter, 925 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 1006 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:37:21,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 1006 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 01:37:21,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8670 states. [2021-12-07 01:37:23,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8670 to 7658. [2021-12-07 01:37:23,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7658 states, 7058 states have (on average 1.3163785775007084) internal successors, (9291), 7306 states have internal predecessors, (9291), 246 states have call successors, (246), 133 states have call predecessors, (246), 353 states have return successors, (4382), 218 states have call predecessors, (4382), 246 states have call successors, (4382) [2021-12-07 01:37:23,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7658 states to 7658 states and 13919 transitions. [2021-12-07 01:37:23,822 INFO L78 Accepts]: Start accepts. Automaton has 7658 states and 13919 transitions. Word has length 91 [2021-12-07 01:37:23,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:37:23,822 INFO L470 AbstractCegarLoop]: Abstraction has 7658 states and 13919 transitions. [2021-12-07 01:37:23,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 15 states have internal predecessors, (51), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-07 01:37:23,822 INFO L276 IsEmpty]: Start isEmpty. Operand 7658 states and 13919 transitions. [2021-12-07 01:37:23,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-07 01:37:23,861 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:37:23,861 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 9, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:37:23,870 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (37)] Ended with exit code 0 [2021-12-07 01:37:24,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:37:24,062 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:37:24,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:37:24,064 INFO L85 PathProgramCache]: Analyzing trace with hash -260632439, now seen corresponding path program 22 times [2021-12-07 01:37:24,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:37:24,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1557897664] [2021-12-07 01:37:24,065 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 01:37:24,066 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:37:24,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:37:24,067 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:37:24,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-12-07 01:37:24,291 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 01:37:24,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:37:24,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-07 01:37:24,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:37:24,524 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 285 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-12-07 01:37:24,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:37:24,914 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 285 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-12-07 01:37:24,914 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:37:24,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1557897664] [2021-12-07 01:37:24,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1557897664] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:37:24,915 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:37:24,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-12-07 01:37:24,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087543061] [2021-12-07 01:37:24,915 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:37:24,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-07 01:37:24,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:37:24,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-07 01:37:24,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-12-07 01:37:24,916 INFO L87 Difference]: Start difference. First operand 7658 states and 13919 transitions. Second operand has 21 states, 20 states have (on average 2.85) internal successors, (57), 17 states have internal predecessors, (57), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-07 01:37:25,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:37:25,706 INFO L93 Difference]: Finished difference Result 11023 states and 25665 transitions. [2021-12-07 01:37:25,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-07 01:37:25,707 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.85) internal successors, (57), 17 states have internal predecessors, (57), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 91 [2021-12-07 01:37:25,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:37:25,788 INFO L225 Difference]: With dead ends: 11023 [2021-12-07 01:37:25,788 INFO L226 Difference]: Without dead ends: 11019 [2021-12-07 01:37:25,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-12-07 01:37:25,816 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 28 mSDsluCounter, 1278 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 1370 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:37:25,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 1370 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 01:37:25,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11019 states. [2021-12-07 01:37:34,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11019 to 9322. [2021-12-07 01:37:34,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9322 states, 8591 states have (on average 1.3359329530904436) internal successors, (11477), 8922 states have internal predecessors, (11477), 302 states have call successors, (302), 133 states have call predecessors, (302), 428 states have return successors, (6326), 266 states have call predecessors, (6326), 302 states have call successors, (6326) [2021-12-07 01:37:34,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9322 states to 9322 states and 18105 transitions. [2021-12-07 01:37:34,555 INFO L78 Accepts]: Start accepts. Automaton has 9322 states and 18105 transitions. Word has length 91 [2021-12-07 01:37:34,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:37:34,556 INFO L470 AbstractCegarLoop]: Abstraction has 9322 states and 18105 transitions. [2021-12-07 01:37:34,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.85) internal successors, (57), 17 states have internal predecessors, (57), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-07 01:37:34,556 INFO L276 IsEmpty]: Start isEmpty. Operand 9322 states and 18105 transitions. [2021-12-07 01:37:34,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-07 01:37:34,588 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:37:34,588 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:37:34,597 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (38)] Ended with exit code 0 [2021-12-07 01:37:34,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:37:34,790 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:37:34,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:37:34,791 INFO L85 PathProgramCache]: Analyzing trace with hash -2137003579, now seen corresponding path program 23 times [2021-12-07 01:37:34,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:37:34,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [903607364] [2021-12-07 01:37:34,792 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-07 01:37:34,793 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:37:34,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:37:34,795 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:37:34,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-12-07 01:37:35,110 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-12-07 01:37:35,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:37:35,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-07 01:37:35,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:37:35,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:37:35,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2021-12-07 01:37:35,528 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 182 proven. 121 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-12-07 01:37:35,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:37:35,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 30 [2021-12-07 01:37:35,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2021-12-07 01:37:35,983 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-12-07 01:37:35,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-07 01:37:36,113 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 21 proven. 285 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-12-07 01:37:36,114 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:37:36,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [903607364] [2021-12-07 01:37:36,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [903607364] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:37:36,114 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:37:36,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-12-07 01:37:36,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805870187] [2021-12-07 01:37:36,114 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:37:36,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-07 01:37:36,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:37:36,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-07 01:37:36,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-12-07 01:37:36,115 INFO L87 Difference]: Start difference. First operand 9322 states and 18105 transitions. Second operand has 24 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-07 01:37:37,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:37:37,345 INFO L93 Difference]: Finished difference Result 12109 states and 22962 transitions. [2021-12-07 01:37:37,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-07 01:37:37,347 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Word has length 91 [2021-12-07 01:37:37,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:37:37,412 INFO L225 Difference]: With dead ends: 12109 [2021-12-07 01:37:37,412 INFO L226 Difference]: Without dead ends: 9340 [2021-12-07 01:37:37,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=169, Invalid=953, Unknown=0, NotChecked=0, Total=1122 [2021-12-07 01:37:37,445 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 29 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 01:37:37,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 323 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 275 Invalid, 0 Unknown, 94 Unchecked, 0.5s Time] [2021-12-07 01:37:37,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9340 states. [2021-12-07 01:37:41,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9340 to 9147. [2021-12-07 01:37:41,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9147 states, 8440 states have (on average 1.3327014218009479) internal successors, (11248), 8765 states have internal predecessors, (11248), 285 states have call successors, (285), 133 states have call predecessors, (285), 421 states have return successors, (5864), 248 states have call predecessors, (5864), 285 states have call successors, (5864) [2021-12-07 01:37:41,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9147 states to 9147 states and 17397 transitions. [2021-12-07 01:37:41,882 INFO L78 Accepts]: Start accepts. Automaton has 9147 states and 17397 transitions. Word has length 91 [2021-12-07 01:37:41,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:37:41,882 INFO L470 AbstractCegarLoop]: Abstraction has 9147 states and 17397 transitions. [2021-12-07 01:37:41,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-07 01:37:41,882 INFO L276 IsEmpty]: Start isEmpty. Operand 9147 states and 17397 transitions. [2021-12-07 01:37:41,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-07 01:37:41,907 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:37:41,907 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 12, 5, 5, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:37:41,916 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (39)] Ended with exit code 0 [2021-12-07 01:37:42,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:37:42,109 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:37:42,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:37:42,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1013044535, now seen corresponding path program 24 times [2021-12-07 01:37:42,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:37:42,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [42431348] [2021-12-07 01:37:42,112 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-07 01:37:42,112 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:37:42,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:37:42,114 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:37:42,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09c70de-5198-4842-942e-14f0209d70d6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-12-07 01:37:42,457 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-12-07 01:37:42,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:37:42,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-07 01:37:42,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:37:42,671 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 303 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-12-07 01:37:42,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:37:43,083 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 303 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-12-07 01:37:43,083 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:37:43,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [42431348] [2021-12-07 01:37:43,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [42431348] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:37:43,083 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:37:43,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-12-07 01:37:43,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157142138] [2021-12-07 01:37:43,083 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:37:43,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-07 01:37:43,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:37:43,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-07 01:37:43,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-12-07 01:37:43,084 INFO L87 Difference]: Start difference. First operand 9147 states and 17397 transitions. Second operand has 23 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 19 states have internal predecessors, (63), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-07 01:37:44,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:37:44,023 INFO L93 Difference]: Finished difference Result 13470 states and 34905 transitions. [2021-12-07 01:37:44,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-07 01:37:44,024 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 19 states have internal predecessors, (63), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 91 [2021-12-07 01:37:44,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:37:44,144 INFO L225 Difference]: With dead ends: 13470 [2021-12-07 01:37:44,145 INFO L226 Difference]: Without dead ends: 13466 [2021-12-07 01:37:44,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 158 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-12-07 01:37:44,185 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 31 mSDsluCounter, 1543 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 1636 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:37:44,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 1636 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-07 01:37:44,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13466 states.