./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/insertion_sort-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d00228-545a-4659-8a58-acb8990aa2e0/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d00228-545a-4659-8a58-acb8990aa2e0/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_52d00228-545a-4659-8a58-acb8990aa2e0/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d00228-545a-4659-8a58-acb8990aa2e0/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops/insertion_sort-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d00228-545a-4659-8a58-acb8990aa2e0/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_52d00228-545a-4659-8a58-acb8990aa2e0/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 e6909fdbd47ee7cc9ac1cfcb139a86d0e022eb1f9eab8a625d6818fa3999b29d --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 23:43:30,782 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 23:43:30,784 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 23:43:30,814 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 23:43:30,815 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 23:43:30,816 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 23:43:30,817 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 23:43:30,820 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 23:43:30,822 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 23:43:30,823 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 23:43:30,824 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 23:43:30,826 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 23:43:30,826 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 23:43:30,827 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 23:43:30,829 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 23:43:30,830 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 23:43:30,831 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 23:43:30,833 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 23:43:30,835 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 23:43:30,837 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 23:43:30,839 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 23:43:30,840 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 23:43:30,842 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 23:43:30,842 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 23:43:30,846 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 23:43:30,846 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 23:43:30,847 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 23:43:30,848 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 23:43:30,848 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 23:43:30,849 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 23:43:30,850 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 23:43:30,850 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 23:43:30,851 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 23:43:30,852 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 23:43:30,853 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 23:43:30,854 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 23:43:30,854 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 23:43:30,855 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 23:43:30,855 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 23:43:30,856 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 23:43:30,856 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 23:43:30,857 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d00228-545a-4659-8a58-acb8990aa2e0/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 23:43:30,873 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 23:43:30,874 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 23:43:30,874 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 23:43:30,874 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 23:43:30,875 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 23:43:30,875 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 23:43:30,875 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 23:43:30,875 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 23:43:30,875 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 23:43:30,876 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 23:43:30,876 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 23:43:30,876 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 23:43:30,876 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 23:43:30,876 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 23:43:30,876 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 23:43:30,876 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 23:43:30,876 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 23:43:30,877 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 23:43:30,877 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 23:43:30,877 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 23:43:30,877 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 23:43:30,877 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 23:43:30,877 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 23:43:30,877 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 23:43:30,877 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 23:43:30,878 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 23:43:30,878 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 23:43:30,878 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 23:43:30,878 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 23:43:30,878 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 23:43:30,878 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 23:43:30,878 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 23:43:30,879 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 23:43:30,879 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 23:43:30,879 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_52d00228-545a-4659-8a58-acb8990aa2e0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d00228-545a-4659-8a58-acb8990aa2e0/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e6909fdbd47ee7cc9ac1cfcb139a86d0e022eb1f9eab8a625d6818fa3999b29d [2021-12-06 23:43:31,074 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 23:43:31,092 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 23:43:31,093 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 23:43:31,094 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 23:43:31,095 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 23:43:31,096 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d00228-545a-4659-8a58-acb8990aa2e0/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/loops/insertion_sort-2.c [2021-12-06 23:43:31,140 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d00228-545a-4659-8a58-acb8990aa2e0/bin/uautomizer-DrprNOufMa/data/07de3d3ed/37da7d9a762944928a9defe8b4407659/FLAG91208e0b2 [2021-12-06 23:43:31,539 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 23:43:31,539 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d00228-545a-4659-8a58-acb8990aa2e0/sv-benchmarks/c/loops/insertion_sort-2.c [2021-12-06 23:43:31,543 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d00228-545a-4659-8a58-acb8990aa2e0/bin/uautomizer-DrprNOufMa/data/07de3d3ed/37da7d9a762944928a9defe8b4407659/FLAG91208e0b2 [2021-12-06 23:43:31,553 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d00228-545a-4659-8a58-acb8990aa2e0/bin/uautomizer-DrprNOufMa/data/07de3d3ed/37da7d9a762944928a9defe8b4407659 [2021-12-06 23:43:31,554 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 23:43:31,555 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 23:43:31,557 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 23:43:31,557 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 23:43:31,559 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 23:43:31,560 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 11:43:31" (1/1) ... [2021-12-06 23:43:31,560 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9548cb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:43:31, skipping insertion in model container [2021-12-06 23:43:31,561 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 11:43:31" (1/1) ... [2021-12-06 23:43:31,565 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 23:43:31,575 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 23:43:31,680 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_52d00228-545a-4659-8a58-acb8990aa2e0/sv-benchmarks/c/loops/insertion_sort-2.c[328,341] [2021-12-06 23:43:31,696 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 23:43:31,703 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 23:43:31,714 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_52d00228-545a-4659-8a58-acb8990aa2e0/sv-benchmarks/c/loops/insertion_sort-2.c[328,341] [2021-12-06 23:43:31,722 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 23:43:31,735 INFO L208 MainTranslator]: Completed translation [2021-12-06 23:43:31,735 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:43:31 WrapperNode [2021-12-06 23:43:31,736 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 23:43:31,737 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 23:43:31,737 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 23:43:31,737 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 23:43:31,742 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:43:31" (1/1) ... [2021-12-06 23:43:31,747 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:43:31" (1/1) ... [2021-12-06 23:43:31,762 INFO L137 Inliner]: procedures = 15, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 82 [2021-12-06 23:43:31,763 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 23:43:31,763 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 23:43:31,763 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 23:43:31,763 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 23:43:31,769 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:43:31" (1/1) ... [2021-12-06 23:43:31,770 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:43:31" (1/1) ... [2021-12-06 23:43:31,771 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:43:31" (1/1) ... [2021-12-06 23:43:31,771 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:43:31" (1/1) ... [2021-12-06 23:43:31,775 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:43:31" (1/1) ... [2021-12-06 23:43:31,778 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:43:31" (1/1) ... [2021-12-06 23:43:31,779 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:43:31" (1/1) ... [2021-12-06 23:43:31,781 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 23:43:31,782 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 23:43:31,782 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 23:43:31,782 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 23:43:31,783 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:43:31" (1/1) ... [2021-12-06 23:43:31,789 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 23:43:31,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d00228-545a-4659-8a58-acb8990aa2e0/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:43:31,809 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d00228-545a-4659-8a58-acb8990aa2e0/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 23:43:31,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d00228-545a-4659-8a58-acb8990aa2e0/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 23:43:31,840 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 23:43:31,840 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 23:43:31,840 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 23:43:31,840 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 23:43:31,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 23:43:31,840 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 23:43:31,840 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 23:43:31,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 23:43:31,886 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 23:43:31,887 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 23:43:31,984 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 23:43:31,988 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 23:43:31,988 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-06 23:43:31,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 11:43:31 BoogieIcfgContainer [2021-12-06 23:43:31,990 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 23:43:31,991 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 23:43:31,991 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 23:43:31,994 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 23:43:31,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 11:43:31" (1/3) ... [2021-12-06 23:43:31,995 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@746b372c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 11:43:31, skipping insertion in model container [2021-12-06 23:43:31,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:43:31" (2/3) ... [2021-12-06 23:43:31,995 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@746b372c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 11:43:31, skipping insertion in model container [2021-12-06 23:43:31,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 11:43:31" (3/3) ... [2021-12-06 23:43:31,997 INFO L111 eAbstractionObserver]: Analyzing ICFG insertion_sort-2.c [2021-12-06 23:43:32,002 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 23:43:32,002 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 23:43:32,048 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 23:43:32,055 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 23:43:32,055 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 23:43:32,068 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:43:32,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-06 23:43:32,072 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:43:32,072 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:43:32,073 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:43:32,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:43:32,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1991822609, now seen corresponding path program 1 times [2021-12-06 23:43:32,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:43:32,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333817041] [2021-12-06 23:43:32,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:43:32,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:43:32,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:43:32,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:43:32,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:43:32,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333817041] [2021-12-06 23:43:32,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333817041] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:43:32,199 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:43:32,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 23:43:32,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615572542] [2021-12-06 23:43:32,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:43:32,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 23:43:32,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:43:32,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 23:43:32,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 23:43:32,226 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:43:32,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:43:32,237 INFO L93 Difference]: Finished difference Result 40 states and 56 transitions. [2021-12-06 23:43:32,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 23:43:32,239 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-06 23:43:32,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:43:32,246 INFO L225 Difference]: With dead ends: 40 [2021-12-06 23:43:32,246 INFO L226 Difference]: Without dead ends: 18 [2021-12-06 23:43:32,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 23:43:32,253 INFO L933 BasicCegarLoop]: 26 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, 26 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 [2021-12-06 23:43:32,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:43:32,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-12-06 23:43:32,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-12-06 23:43:32,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:43:32,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2021-12-06 23:43:32,283 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 9 [2021-12-06 23:43:32,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:43:32,283 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2021-12-06 23:43:32,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:43:32,283 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2021-12-06 23:43:32,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-06 23:43:32,284 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:43:32,284 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:43:32,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 23:43:32,284 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:43:32,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:43:32,285 INFO L85 PathProgramCache]: Analyzing trace with hash -2015834155, now seen corresponding path program 1 times [2021-12-06 23:43:32,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:43:32,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408243242] [2021-12-06 23:43:32,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:43:32,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:43:32,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:43:32,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:43:32,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:43:32,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408243242] [2021-12-06 23:43:32,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408243242] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:43:32,410 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:43:32,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 23:43:32,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806903210] [2021-12-06 23:43:32,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:43:32,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 23:43:32,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:43:32,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 23:43:32,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:43:32,413 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:43:32,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:43:32,457 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2021-12-06 23:43:32,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 23:43:32,457 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-06 23:43:32,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:43:32,458 INFO L225 Difference]: With dead ends: 37 [2021-12-06 23:43:32,458 INFO L226 Difference]: Without dead ends: 20 [2021-12-06 23:43:32,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-06 23:43:32,460 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 3 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:43:32,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 48 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:43:32,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-12-06 23:43:32,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2021-12-06 23:43:32,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:43:32,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-12-06 23:43:32,466 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 9 [2021-12-06 23:43:32,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:43:32,466 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-12-06 23:43:32,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:43:32,467 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-12-06 23:43:32,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 23:43:32,467 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:43:32,468 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:43:32,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 23:43:32,468 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:43:32,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:43:32,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1565261075, now seen corresponding path program 1 times [2021-12-06 23:43:32,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:43:32,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453139782] [2021-12-06 23:43:32,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:43:32,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:43:32,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:43:32,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:43:32,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:43:32,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453139782] [2021-12-06 23:43:32,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453139782] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:43:32,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276408823] [2021-12-06 23:43:32,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:43:32,582 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:43:32,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d00228-545a-4659-8a58-acb8990aa2e0/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:43:32,583 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d00228-545a-4659-8a58-acb8990aa2e0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:43:32,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d00228-545a-4659-8a58-acb8990aa2e0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 23:43:32,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:43:32,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 23:43:32,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:43:32,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 23:43:32,741 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:43:32,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276408823] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:43:32,741 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:43:32,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 6 [2021-12-06 23:43:32,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744507033] [2021-12-06 23:43:32,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:43:32,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 23:43:32,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:43:32,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 23:43:32,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 23:43:32,743 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:43:32,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:43:32,782 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2021-12-06 23:43:32,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 23:43:32,782 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-06 23:43:32,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:43:32,783 INFO L225 Difference]: With dead ends: 33 [2021-12-06 23:43:32,783 INFO L226 Difference]: Without dead ends: 25 [2021-12-06 23:43:32,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-12-06 23:43:32,785 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 10 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:43:32,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 48 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:43:32,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-12-06 23:43:32,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2021-12-06 23:43:32,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:43:32,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2021-12-06 23:43:32,790 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 11 [2021-12-06 23:43:32,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:43:32,791 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2021-12-06 23:43:32,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:43:32,791 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2021-12-06 23:43:32,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-06 23:43:32,792 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:43:32,792 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:43:32,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d00228-545a-4659-8a58-acb8990aa2e0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 23:43:32,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d00228-545a-4659-8a58-acb8990aa2e0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-12-06 23:43:32,993 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:43:32,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:43:32,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1929667994, now seen corresponding path program 1 times [2021-12-06 23:43:32,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:43:32,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615652349] [2021-12-06 23:43:32,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:43:32,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:43:33,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:43:33,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:43:33,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:43:33,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615652349] [2021-12-06 23:43:33,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615652349] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:43:33,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856450321] [2021-12-06 23:43:33,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:43:33,129 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:43:33,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d00228-545a-4659-8a58-acb8990aa2e0/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:43:33,131 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d00228-545a-4659-8a58-acb8990aa2e0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:43:33,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d00228-545a-4659-8a58-acb8990aa2e0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 23:43:33,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:43:33,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 23:43:33,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:43:33,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:43:33,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:43:35,689 WARN L838 $PredicateComparison]: unable to prove that (forall ((|aux_mod_aux_mod_ULTIMATE.start_main_~SIZE~0#1_48_75| Int) (|aux_div_aux_mod_ULTIMATE.start_main_~SIZE~0#1_48_75| Int)) (or (< (mod |c_ULTIMATE.start_main_~j~0#1| 4294967296) (mod (+ (* |aux_mod_aux_mod_ULTIMATE.start_main_~SIZE~0#1_48_75| 4294967295) 1) 4294967296)) (<= 4294967296 |aux_mod_aux_mod_ULTIMATE.start_main_~SIZE~0#1_48_75|) (<= (+ |aux_mod_aux_mod_ULTIMATE.start_main_~SIZE~0#1_48_75| 4294967295 (* 4294967296 |aux_div_aux_mod_ULTIMATE.start_main_~SIZE~0#1_48_75|)) 0) (<= 0 |aux_div_aux_mod_ULTIMATE.start_main_~SIZE~0#1_48_75|))) is different from false [2021-12-06 23:43:43,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-12-06 23:43:43,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856450321] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:43:43,388 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:43:43,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 11 [2021-12-06 23:43:43,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909306143] [2021-12-06 23:43:43,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:43:43,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 23:43:43,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:43:43,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 23:43:43,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=64, Unknown=3, NotChecked=16, Total=110 [2021-12-06 23:43:43,389 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:43:44,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:43:44,525 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2021-12-06 23:43:44,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 23:43:44,525 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-06 23:43:44,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:43:44,526 INFO L225 Difference]: With dead ends: 43 [2021-12-06 23:43:44,526 INFO L226 Difference]: Without dead ends: 28 [2021-12-06 23:43:44,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=39, Invalid=94, Unknown=3, NotChecked=20, Total=156 [2021-12-06 23:43:44,527 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 25 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:43:44,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 89 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 48 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2021-12-06 23:43:44,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-06 23:43:44,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2021-12-06 23:43:44,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:43:44,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2021-12-06 23:43:44,531 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 17 [2021-12-06 23:43:44,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:43:44,531 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2021-12-06 23:43:44,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:43:44,531 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2021-12-06 23:43:44,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-06 23:43:44,531 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:43:44,531 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:43:44,551 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d00228-545a-4659-8a58-acb8990aa2e0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 23:43:44,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d00228-545a-4659-8a58-acb8990aa2e0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:43:44,733 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:43:44,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:43:44,735 INFO L85 PathProgramCache]: Analyzing trace with hash 797223332, now seen corresponding path program 2 times [2021-12-06 23:43:44,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:43:44,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402701483] [2021-12-06 23:43:44,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:43:44,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:43:44,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:43:45,120 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:43:45,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:43:45,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402701483] [2021-12-06 23:43:45,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402701483] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:43:45,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959698412] [2021-12-06 23:43:45,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 23:43:45,121 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:43:45,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d00228-545a-4659-8a58-acb8990aa2e0/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:43:45,122 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d00228-545a-4659-8a58-acb8990aa2e0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:43:45,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d00228-545a-4659-8a58-acb8990aa2e0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 23:43:45,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 23:43:45,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:43:45,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-06 23:43:45,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:43:45,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:43:45,350 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 [2021-12-06 23:43:45,430 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 23:43:45,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 26 treesize of output 10 [2021-12-06 23:43:45,455 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 23:43:45,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:43:45,631 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 41 treesize of output 35 [2021-12-06 23:43:45,652 INFO L354 Elim1Store]: treesize reduction 21, result has 43.2 percent of original size [2021-12-06 23:43:45,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 90 [2021-12-06 23:43:45,746 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 23:43:45,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959698412] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:43:45,747 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:43:45,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 10] total 26 [2021-12-06 23:43:45,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636315404] [2021-12-06 23:43:45,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:43:45,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-06 23:43:45,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:43:45,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-06 23:43:45,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2021-12-06 23:43:45,749 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:43:46,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:43:46,553 INFO L93 Difference]: Finished difference Result 89 states and 110 transitions. [2021-12-06 23:43:46,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-06 23:43:46,553 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-06 23:43:46,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:43:46,555 INFO L225 Difference]: With dead ends: 89 [2021-12-06 23:43:46,555 INFO L226 Difference]: Without dead ends: 87 [2021-12-06 23:43:46,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=470, Invalid=1692, Unknown=0, NotChecked=0, Total=2162 [2021-12-06 23:43:46,557 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 126 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 23:43:46,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 187 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 389 Invalid, 0 Unknown, 65 Unchecked, 0.3s Time] [2021-12-06 23:43:46,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-12-06 23:43:46,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 32. [2021-12-06 23:43:46,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 31 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:43:46,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2021-12-06 23:43:46,564 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 19 [2021-12-06 23:43:46,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:43:46,564 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2021-12-06 23:43:46,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:43:46,564 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2021-12-06 23:43:46,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-06 23:43:46,565 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:43:46,565 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:43:46,584 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d00228-545a-4659-8a58-acb8990aa2e0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 23:43:46,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d00228-545a-4659-8a58-acb8990aa2e0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:43:46,767 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:43:46,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:43:46,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1477281702, now seen corresponding path program 1 times [2021-12-06 23:43:46,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:43:46,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790076918] [2021-12-06 23:43:46,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:43:46,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:43:46,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:43:46,852 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 23:43:46,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:43:46,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790076918] [2021-12-06 23:43:46,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790076918] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:43:46,852 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:43:46,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 23:43:46,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627004824] [2021-12-06 23:43:46,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:43:46,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 23:43:46,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:43:46,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 23:43:46,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:43:46,854 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:43:46,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:43:46,891 INFO L93 Difference]: Finished difference Result 68 states and 88 transitions. [2021-12-06 23:43:46,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 23:43:46,892 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-06 23:43:46,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:43:46,892 INFO L225 Difference]: With dead ends: 68 [2021-12-06 23:43:46,892 INFO L226 Difference]: Without dead ends: 45 [2021-12-06 23:43:46,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-06 23:43:46,894 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 13 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:43:46,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 32 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:43:46,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-06 23:43:46,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2021-12-06 23:43:46,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:43:46,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2021-12-06 23:43:46,900 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 19 [2021-12-06 23:43:46,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:43:46,900 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2021-12-06 23:43:46,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:43:46,900 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2021-12-06 23:43:46,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-06 23:43:46,901 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:43:46,901 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:43:46,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 23:43:46,901 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:43:46,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:43:46,902 INFO L85 PathProgramCache]: Analyzing trace with hash -815236263, now seen corresponding path program 1 times [2021-12-06 23:43:46,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:43:46,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130985684] [2021-12-06 23:43:46,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:43:46,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:43:46,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:43:47,262 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:43:47,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:43:47,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130985684] [2021-12-06 23:43:47,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130985684] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:43:47,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123123798] [2021-12-06 23:43:47,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:43:47,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:43:47,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d00228-545a-4659-8a58-acb8990aa2e0/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:43:47,264 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d00228-545a-4659-8a58-acb8990aa2e0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:43:47,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d00228-545a-4659-8a58-acb8990aa2e0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 23:43:47,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:43:47,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-06 23:43:47,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:43:47,421 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-12-06 23:43:47,421 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 30 [2021-12-06 23:43:47,639 INFO L354 Elim1Store]: treesize reduction 108, result has 10.0 percent of original size [2021-12-06 23:43:47,639 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 31 [2021-12-06 23:43:47,850 INFO L354 Elim1Store]: treesize reduction 78, result has 8.2 percent of original size [2021-12-06 23:43:47,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 16 [2021-12-06 23:43:47,881 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 23:43:47,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:43:48,209 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 68 treesize of output 60 [2021-12-06 23:43:48,217 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-12-06 23:43:48,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 770 treesize of output 710 [2021-12-06 23:43:49,690 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 23:43:49,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123123798] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:43:49,690 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:43:49,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 10] total 32 [2021-12-06 23:43:49,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136316185] [2021-12-06 23:43:49,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:43:49,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-06 23:43:49,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:43:49,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-06 23:43:49,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=848, Unknown=1, NotChecked=0, Total=992 [2021-12-06 23:43:49,692 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 32 states, 32 states have (on average 1.65625) internal successors, (53), 32 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:43:59,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:43:59,228 INFO L93 Difference]: Finished difference Result 87 states and 107 transitions. [2021-12-06 23:43:59,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-06 23:43:59,229 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.65625) internal successors, (53), 32 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-06 23:43:59,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:43:59,230 INFO L225 Difference]: With dead ends: 87 [2021-12-06 23:43:59,230 INFO L226 Difference]: Without dead ends: 85 [2021-12-06 23:43:59,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=281, Invalid=1698, Unknown=1, NotChecked=0, Total=1980 [2021-12-06 23:43:59,232 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 76 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 203 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:43:59,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 258 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 217 Invalid, 0 Unknown, 203 Unchecked, 0.1s Time] [2021-12-06 23:43:59,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-12-06 23:43:59,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 39. [2021-12-06 23:43:59,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.3157894736842106) internal successors, (50), 38 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:43:59,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2021-12-06 23:43:59,240 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 22 [2021-12-06 23:43:59,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:43:59,240 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2021-12-06 23:43:59,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.65625) internal successors, (53), 32 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:43:59,240 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2021-12-06 23:43:59,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-06 23:43:59,241 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:43:59,241 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:43:59,265 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d00228-545a-4659-8a58-acb8990aa2e0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 23:43:59,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d00228-545a-4659-8a58-acb8990aa2e0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:43:59,442 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:43:59,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:43:59,442 INFO L85 PathProgramCache]: Analyzing trace with hash 755836794, now seen corresponding path program 1 times [2021-12-06 23:43:59,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:43:59,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360576514] [2021-12-06 23:43:59,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:43:59,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:43:59,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:43:59,557 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 23:43:59,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:43:59,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360576514] [2021-12-06 23:43:59,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360576514] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:43:59,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884872133] [2021-12-06 23:43:59,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:43:59,557 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:43:59,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d00228-545a-4659-8a58-acb8990aa2e0/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:43:59,558 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d00228-545a-4659-8a58-acb8990aa2e0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:43:59,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d00228-545a-4659-8a58-acb8990aa2e0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 23:43:59,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:43:59,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 23:43:59,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:43:59,693 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 23:43:59,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:43:59,807 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 23:43:59,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884872133] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:43:59,807 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:43:59,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2021-12-06 23:43:59,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778731704] [2021-12-06 23:43:59,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:43:59,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-06 23:43:59,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:43:59,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-06 23:43:59,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-12-06 23:43:59,809 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:43:59,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:43:59,948 INFO L93 Difference]: Finished difference Result 127 states and 171 transitions. [2021-12-06 23:43:59,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 23:43:59,948 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-06 23:43:59,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:43:59,949 INFO L225 Difference]: With dead ends: 127 [2021-12-06 23:43:59,949 INFO L226 Difference]: Without dead ends: 90 [2021-12-06 23:43:59,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-12-06 23:43:59,950 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 88 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:43:59,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 165 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:43:59,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-12-06 23:43:59,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 71. [2021-12-06 23:43:59,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.3142857142857143) internal successors, (92), 70 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:43:59,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 92 transitions. [2021-12-06 23:43:59,958 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 92 transitions. Word has length 23 [2021-12-06 23:43:59,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:43:59,958 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 92 transitions. [2021-12-06 23:43:59,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:43:59,958 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 92 transitions. [2021-12-06 23:43:59,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-06 23:43:59,959 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:43:59,959 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:43:59,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d00228-545a-4659-8a58-acb8990aa2e0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-06 23:44:00,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d00228-545a-4659-8a58-acb8990aa2e0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:44:00,161 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:44:00,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:44:00,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1610174852, now seen corresponding path program 2 times [2021-12-06 23:44:00,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:44:00,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038105828] [2021-12-06 23:44:00,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:44:00,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:44:00,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:44:00,218 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 23:44:00,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:44:00,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038105828] [2021-12-06 23:44:00,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038105828] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:44:00,219 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:44:00,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 23:44:00,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712646238] [2021-12-06 23:44:00,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:44:00,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:44:00,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:44:00,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:44:00,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:44:00,221 INFO L87 Difference]: Start difference. First operand 71 states and 92 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:44:00,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:44:00,236 INFO L93 Difference]: Finished difference Result 105 states and 137 transitions. [2021-12-06 23:44:00,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:44:00,236 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-06 23:44:00,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:44:00,237 INFO L225 Difference]: With dead ends: 105 [2021-12-06 23:44:00,237 INFO L226 Difference]: Without dead ends: 43 [2021-12-06 23:44:00,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:44:00,238 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:44:00,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:44:00,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-06 23:44:00,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-12-06 23:44:00,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 42 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:44:00,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2021-12-06 23:44:00,245 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 25 [2021-12-06 23:44:00,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:44:00,245 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2021-12-06 23:44:00,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:44:00,245 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2021-12-06 23:44:00,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-06 23:44:00,246 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:44:00,246 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:44:00,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-06 23:44:00,247 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:44:00,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:44:00,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1879558005, now seen corresponding path program 3 times [2021-12-06 23:44:00,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:44:00,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991774998] [2021-12-06 23:44:00,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:44:00,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:44:00,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:44:00,605 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:44:00,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:44:00,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991774998] [2021-12-06 23:44:00,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991774998] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:44:00,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428364338] [2021-12-06 23:44:00,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 23:44:00,606 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:44:00,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d00228-545a-4659-8a58-acb8990aa2e0/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:44:00,607 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d00228-545a-4659-8a58-acb8990aa2e0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:44:00,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d00228-545a-4659-8a58-acb8990aa2e0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 23:44:00,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 23:44:00,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:44:00,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-06 23:44:00,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:44:00,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:44:00,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 33 [2021-12-06 23:44:00,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:44:00,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:44:00,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:44:00,842 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 23:44:00,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2021-12-06 23:44:00,883 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 23:44:00,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 26 treesize of output 10 [2021-12-06 23:44:00,906 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 23:44:00,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:44:05,284 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 57 treesize of output 51 [2021-12-06 23:44:05,310 INFO L354 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2021-12-06 23:44:05,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 373 treesize of output 363 [2021-12-06 23:44:07,807 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 23:44:07,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428364338] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:44:07,807 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:44:07,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 31 [2021-12-06 23:44:07,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531621834] [2021-12-06 23:44:07,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:44:07,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-06 23:44:07,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:44:07,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-06 23:44:07,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=790, Unknown=1, NotChecked=0, Total=930 [2021-12-06 23:44:07,809 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 31 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:44:10,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:44:10,729 INFO L93 Difference]: Finished difference Result 134 states and 167 transitions. [2021-12-06 23:44:10,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-06 23:44:10,730 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 31 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-06 23:44:10,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:44:10,731 INFO L225 Difference]: With dead ends: 134 [2021-12-06 23:44:10,731 INFO L226 Difference]: Without dead ends: 111 [2021-12-06 23:44:10,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 34 SyntacticMatches, 11 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=387, Invalid=2162, Unknown=1, NotChecked=0, Total=2550 [2021-12-06 23:44:10,732 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 71 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 339 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 23:44:10,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 243 Invalid, 809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 405 Invalid, 0 Unknown, 339 Unchecked, 0.3s Time] [2021-12-06 23:44:10,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-12-06 23:44:10,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 61. [2021-12-06 23:44:10,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.2666666666666666) internal successors, (76), 60 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:44:10,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 76 transitions. [2021-12-06 23:44:10,738 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 76 transitions. Word has length 27 [2021-12-06 23:44:10,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:44:10,738 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 76 transitions. [2021-12-06 23:44:10,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 31 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:44:10,738 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 76 transitions. [2021-12-06 23:44:10,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-06 23:44:10,739 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:44:10,739 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:44:10,758 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d00228-545a-4659-8a58-acb8990aa2e0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 23:44:10,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d00228-545a-4659-8a58-acb8990aa2e0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-06 23:44:10,941 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:44:10,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:44:10,942 INFO L85 PathProgramCache]: Analyzing trace with hash 17457638, now seen corresponding path program 1 times [2021-12-06 23:44:10,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:44:10,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814846518] [2021-12-06 23:44:10,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:44:10,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:44:11,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:44:11,212 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 23:44:11,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:44:11,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814846518] [2021-12-06 23:44:11,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814846518] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:44:11,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328022661] [2021-12-06 23:44:11,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:44:11,213 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:44:11,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d00228-545a-4659-8a58-acb8990aa2e0/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:44:11,213 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d00228-545a-4659-8a58-acb8990aa2e0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:44:11,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d00228-545a-4659-8a58-acb8990aa2e0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 23:44:11,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:44:11,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-06 23:44:11,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:44:11,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:44:11,463 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 [2021-12-06 23:44:11,522 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 23:44:11,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 26 treesize of output 10 [2021-12-06 23:44:11,540 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 23:44:11,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:44:11,663 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 41 treesize of output 35 [2021-12-06 23:44:11,679 INFO L354 Elim1Store]: treesize reduction 21, result has 43.2 percent of original size [2021-12-06 23:44:11,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 90 [2021-12-06 23:44:11,815 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 23:44:11,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328022661] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:44:11,815 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:44:11,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 12] total 28 [2021-12-06 23:44:11,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571987944] [2021-12-06 23:44:11,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:44:11,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-06 23:44:11,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:44:11,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-06 23:44:11,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2021-12-06 23:44:11,816 INFO L87 Difference]: Start difference. First operand 61 states and 76 transitions. Second operand has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:44:14,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:44:14,178 INFO L93 Difference]: Finished difference Result 156 states and 189 transitions. [2021-12-06 23:44:14,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-12-06 23:44:14,179 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-06 23:44:14,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:44:14,180 INFO L225 Difference]: With dead ends: 156 [2021-12-06 23:44:14,180 INFO L226 Difference]: Without dead ends: 133 [2021-12-06 23:44:14,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 42 SyntacticMatches, 7 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1171 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=780, Invalid=3510, Unknown=0, NotChecked=0, Total=4290 [2021-12-06 23:44:14,181 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 194 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 23:44:14,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 267 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 500 Invalid, 0 Unknown, 120 Unchecked, 0.4s Time] [2021-12-06 23:44:14,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-12-06 23:44:14,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 66. [2021-12-06 23:44:14,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.2769230769230768) internal successors, (83), 65 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:44:14,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 83 transitions. [2021-12-06 23:44:14,187 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 83 transitions. Word has length 30 [2021-12-06 23:44:14,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:44:14,188 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 83 transitions. [2021-12-06 23:44:14,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:44:14,188 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 83 transitions. [2021-12-06 23:44:14,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-06 23:44:14,188 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:44:14,189 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:44:14,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d00228-545a-4659-8a58-acb8990aa2e0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-06 23:44:14,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d00228-545a-4659-8a58-acb8990aa2e0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:44:14,390 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:44:14,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:44:14,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1513919954, now seen corresponding path program 3 times [2021-12-06 23:44:14,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:44:14,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144693557] [2021-12-06 23:44:14,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:44:14,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:44:14,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:44:14,792 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:44:14,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:44:14,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144693557] [2021-12-06 23:44:14,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144693557] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:44:14,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113794174] [2021-12-06 23:44:14,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 23:44:14,793 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:44:14,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d00228-545a-4659-8a58-acb8990aa2e0/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:44:14,793 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d00228-545a-4659-8a58-acb8990aa2e0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:44:14,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d00228-545a-4659-8a58-acb8990aa2e0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 23:44:14,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-06 23:44:14,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:44:14,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-06 23:44:14,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:44:14,950 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-06 23:44:14,950 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 40 treesize of output 30 [2021-12-06 23:44:15,112 INFO L354 Elim1Store]: treesize reduction 109, result has 9.2 percent of original size [2021-12-06 23:44:15,113 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 49 treesize of output 30 [2021-12-06 23:44:15,274 INFO L354 Elim1Store]: treesize reduction 88, result has 20.0 percent of original size [2021-12-06 23:44:15,274 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 35 treesize of output 37 [2021-12-06 23:44:15,388 INFO L354 Elim1Store]: treesize reduction 36, result has 7.7 percent of original size [2021-12-06 23:44:15,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 13 [2021-12-06 23:44:15,414 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 23:44:15,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:44:17,540 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_24| Int)) (or (< (+ |v_ULTIMATE.start_main_~i~0#1_24| 1) |c_ULTIMATE.start_main_~j~0#1|) (forall ((v_ArrVal_193 Int)) (let ((.cse0 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#v~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_24| 4) |c_ULTIMATE.start_main_~#v~0#1.offset| 4) v_ArrVal_193))) (<= (select .cse0 |c_ULTIMATE.start_main_~#v~0#1.offset|) (select .cse0 (+ |c_ULTIMATE.start_main_~#v~0#1.offset| 4))))))) is different from false [2021-12-06 23:44:31,074 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 84 treesize of output 76 [2021-12-06 23:44:31,100 INFO L354 Elim1Store]: treesize reduction 27, result has 27.0 percent of original size [2021-12-06 23:44:31,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1462 treesize of output 1412 [2021-12-06 23:44:46,418 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 11 refuted. 1 times theorem prover too weak. 9 trivial. 2 not checked. [2021-12-06 23:44:46,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113794174] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:44:46,419 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:44:46,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 14] total 41 [2021-12-06 23:44:46,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917363075] [2021-12-06 23:44:46,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:44:46,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-06 23:44:46,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:44:46,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-06 23:44:46,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1340, Unknown=11, NotChecked=76, Total=1640 [2021-12-06 23:44:46,420 INFO L87 Difference]: Start difference. First operand 66 states and 83 transitions. Second operand has 41 states, 41 states have (on average 1.7804878048780488) internal successors, (73), 41 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:44:48,913 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~#v~0#1.offset| 0) (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#v~0#1.base|))) (<= (+ (select .cse0 0) 1) (select .cse0 (+ (- 4) |c_ULTIMATE.start_main_~#v~0#1.offset| (* |c_ULTIMATE.start_main_~j~0#1| 4))))) (forall ((|v_ULTIMATE.start_main_~i~0#1_24| Int)) (or (< (+ |v_ULTIMATE.start_main_~i~0#1_24| 1) |c_ULTIMATE.start_main_~j~0#1|) (forall ((v_ArrVal_193 Int)) (let ((.cse1 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#v~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_24| 4) |c_ULTIMATE.start_main_~#v~0#1.offset| 4) v_ArrVal_193))) (<= (select .cse1 |c_ULTIMATE.start_main_~#v~0#1.offset|) (select .cse1 (+ |c_ULTIMATE.start_main_~#v~0#1.offset| 4))))))) (= 8 (* 4 |c_ULTIMATE.start_main_~j~0#1|))) is different from false [2021-12-06 23:45:04,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:45:04,463 INFO L93 Difference]: Finished difference Result 181 states and 225 transitions. [2021-12-06 23:45:04,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-06 23:45:04,464 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.7804878048780488) internal successors, (73), 41 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-06 23:45:04,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:45:04,465 INFO L225 Difference]: With dead ends: 181 [2021-12-06 23:45:04,465 INFO L226 Difference]: Without dead ends: 128 [2021-12-06 23:45:04,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 35.6s TimeCoverageRelationStatistics Valid=475, Invalid=3059, Unknown=14, NotChecked=234, Total=3782 [2021-12-06 23:45:04,467 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 133 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 1069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 485 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 23:45:04,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 354 Invalid, 1069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 521 Invalid, 0 Unknown, 485 Unchecked, 0.4s Time] [2021-12-06 23:45:04,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-12-06 23:45:04,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 72. [2021-12-06 23:45:04,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.267605633802817) internal successors, (90), 71 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:45:04,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 90 transitions. [2021-12-06 23:45:04,473 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 90 transitions. Word has length 30 [2021-12-06 23:45:04,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:45:04,474 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 90 transitions. [2021-12-06 23:45:04,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.7804878048780488) internal successors, (73), 41 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:45:04,474 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 90 transitions. [2021-12-06 23:45:04,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-06 23:45:04,475 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:45:04,475 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:45:04,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d00228-545a-4659-8a58-acb8990aa2e0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-06 23:45:04,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d00228-545a-4659-8a58-acb8990aa2e0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-06 23:45:04,677 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:45:04,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:45:04,678 INFO L85 PathProgramCache]: Analyzing trace with hash -833861584, now seen corresponding path program 4 times [2021-12-06 23:45:04,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:45:04,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658711325] [2021-12-06 23:45:04,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:45:04,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:45:04,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:45:04,751 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 23:45:04,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:45:04,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658711325] [2021-12-06 23:45:04,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658711325] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:45:04,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382206598] [2021-12-06 23:45:04,752 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 23:45:04,752 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:45:04,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d00228-545a-4659-8a58-acb8990aa2e0/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:45:04,753 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d00228-545a-4659-8a58-acb8990aa2e0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:45:04,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d00228-545a-4659-8a58-acb8990aa2e0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 23:45:04,788 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 23:45:04,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:45:04,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 23:45:04,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:45:04,825 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 23:45:04,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:45:04,870 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 23:45:04,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382206598] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:45:04,870 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:45:04,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2021-12-06 23:45:04,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850430251] [2021-12-06 23:45:04,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:45:04,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 23:45:04,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:45:04,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 23:45:04,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-06 23:45:04,871 INFO L87 Difference]: Start difference. First operand 72 states and 90 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:45:05,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:45:05,020 INFO L93 Difference]: Finished difference Result 135 states and 168 transitions. [2021-12-06 23:45:05,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 23:45:05,020 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-06 23:45:05,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:45:05,021 INFO L225 Difference]: With dead ends: 135 [2021-12-06 23:45:05,021 INFO L226 Difference]: Without dead ends: 105 [2021-12-06 23:45:05,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-12-06 23:45:05,022 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 91 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:45:05,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 61 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:45:05,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-12-06 23:45:05,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 68. [2021-12-06 23:45:05,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.2238805970149254) internal successors, (82), 67 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:45:05,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 82 transitions. [2021-12-06 23:45:05,031 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 82 transitions. Word has length 30 [2021-12-06 23:45:05,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:45:05,031 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 82 transitions. [2021-12-06 23:45:05,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:45:05,031 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 82 transitions. [2021-12-06 23:45:05,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-06 23:45:05,032 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:45:05,032 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:45:05,052 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d00228-545a-4659-8a58-acb8990aa2e0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 23:45:05,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d00228-545a-4659-8a58-acb8990aa2e0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:45:05,234 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:45:05,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:45:05,235 INFO L85 PathProgramCache]: Analyzing trace with hash 406516939, now seen corresponding path program 2 times [2021-12-06 23:45:05,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:45:05,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921385499] [2021-12-06 23:45:05,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:45:05,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:45:05,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:45:05,479 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:45:05,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:45:05,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921385499] [2021-12-06 23:45:05,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921385499] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:45:05,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81535932] [2021-12-06 23:45:05,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 23:45:05,480 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:45:05,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d00228-545a-4659-8a58-acb8990aa2e0/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:45:05,480 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d00228-545a-4659-8a58-acb8990aa2e0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:45:05,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d00228-545a-4659-8a58-acb8990aa2e0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 23:45:05,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 23:45:05,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:45:05,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-06 23:45:05,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:45:05,648 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 16 treesize of output 12 [2021-12-06 23:45:05,694 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-06 23:45:05,695 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 23 treesize of output 22 [2021-12-06 23:45:05,757 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-06 23:45:05,758 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 34 treesize of output 10 [2021-12-06 23:45:05,777 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 23:45:05,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:45:10,074 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 67 treesize of output 61 [2021-12-06 23:45:10,096 INFO L354 Elim1Store]: treesize reduction 25, result has 39.0 percent of original size [2021-12-06 23:45:10,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 857 treesize of output 802 [2021-12-06 23:45:10,980 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 23:45:10,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81535932] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:45:10,980 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:45:10,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 15] total 26 [2021-12-06 23:45:10,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191884078] [2021-12-06 23:45:10,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:45:10,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-06 23:45:10,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:45:10,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-06 23:45:10,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=561, Unknown=1, NotChecked=0, Total=650 [2021-12-06 23:45:10,982 INFO L87 Difference]: Start difference. First operand 68 states and 82 transitions. Second operand has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:45:11,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:45:11,383 INFO L93 Difference]: Finished difference Result 103 states and 122 transitions. [2021-12-06 23:45:11,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-06 23:45:11,383 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-12-06 23:45:11,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:45:11,384 INFO L225 Difference]: With dead ends: 103 [2021-12-06 23:45:11,384 INFO L226 Difference]: Without dead ends: 101 [2021-12-06 23:45:11,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 44 SyntacticMatches, 7 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=148, Invalid=973, Unknown=1, NotChecked=0, Total=1122 [2021-12-06 23:45:11,385 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 66 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:45:11,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 178 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 307 Invalid, 0 Unknown, 109 Unchecked, 0.2s Time] [2021-12-06 23:45:11,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-12-06 23:45:11,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 79. [2021-12-06 23:45:11,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.2179487179487178) internal successors, (95), 78 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:45:11,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 95 transitions. [2021-12-06 23:45:11,391 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 95 transitions. Word has length 31 [2021-12-06 23:45:11,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:45:11,391 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 95 transitions. [2021-12-06 23:45:11,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:45:11,392 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 95 transitions. [2021-12-06 23:45:11,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-06 23:45:11,392 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:45:11,392 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:45:11,411 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d00228-545a-4659-8a58-acb8990aa2e0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-06 23:45:11,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d00228-545a-4659-8a58-acb8990aa2e0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-06 23:45:11,594 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:45:11,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:45:11,595 INFO L85 PathProgramCache]: Analyzing trace with hash -661066052, now seen corresponding path program 1 times [2021-12-06 23:45:11,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:45:11,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155349548] [2021-12-06 23:45:11,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:45:11,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:45:11,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:45:11,770 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:45:11,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:45:11,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155349548] [2021-12-06 23:45:11,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155349548] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:45:11,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857303068] [2021-12-06 23:45:11,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:45:11,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:45:11,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d00228-545a-4659-8a58-acb8990aa2e0/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:45:11,771 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d00228-545a-4659-8a58-acb8990aa2e0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:45:11,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d00228-545a-4659-8a58-acb8990aa2e0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 23:45:11,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:45:11,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-06 23:45:11,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:45:11,891 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-06 23:45:11,891 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 34 treesize of output 27 [2021-12-06 23:45:12,019 INFO L354 Elim1Store]: treesize reduction 86, result has 9.5 percent of original size [2021-12-06 23:45:12,019 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 43 treesize of output 30 [2021-12-06 23:45:12,095 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-06 23:45:12,095 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 36 treesize of output 12 [2021-12-06 23:45:12,118 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 23:45:12,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:45:12,456 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 70 treesize of output 62 [2021-12-06 23:45:12,478 INFO L354 Elim1Store]: treesize reduction 31, result has 24.4 percent of original size [2021-12-06 23:45:12,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 438 treesize of output 404 [2021-12-06 23:45:12,702 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 23:45:12,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857303068] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:45:12,702 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:45:12,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 27 [2021-12-06 23:45:12,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845910900] [2021-12-06 23:45:12,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:45:12,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-06 23:45:12,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:45:12,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-06 23:45:12,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-12-06 23:45:12,703 INFO L87 Difference]: Start difference. First operand 79 states and 95 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:45:13,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:45:13,327 INFO L93 Difference]: Finished difference Result 122 states and 144 transitions. [2021-12-06 23:45:13,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-06 23:45:13,327 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-06 23:45:13,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:45:13,328 INFO L225 Difference]: With dead ends: 122 [2021-12-06 23:45:13,328 INFO L226 Difference]: Without dead ends: 120 [2021-12-06 23:45:13,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 49 SyntacticMatches, 7 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=230, Invalid=1662, Unknown=0, NotChecked=0, Total=1892 [2021-12-06 23:45:13,329 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 39 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 115 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 23:45:13,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 317 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 407 Invalid, 0 Unknown, 115 Unchecked, 0.3s Time] [2021-12-06 23:45:13,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-12-06 23:45:13,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 79. [2021-12-06 23:45:13,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.2307692307692308) internal successors, (96), 78 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:45:13,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 96 transitions. [2021-12-06 23:45:13,336 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 96 transitions. Word has length 34 [2021-12-06 23:45:13,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:45:13,336 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 96 transitions. [2021-12-06 23:45:13,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:45:13,336 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 96 transitions. [2021-12-06 23:45:13,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-06 23:45:13,336 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:45:13,336 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:45:13,355 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d00228-545a-4659-8a58-acb8990aa2e0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-06 23:45:13,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d00228-545a-4659-8a58-acb8990aa2e0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-06 23:45:13,538 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:45:13,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:45:13,539 INFO L85 PathProgramCache]: Analyzing trace with hash -305428703, now seen corresponding path program 3 times [2021-12-06 23:45:13,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:45:13,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121647240] [2021-12-06 23:45:13,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:45:13,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:45:13,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:45:13,693 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 23:45:13,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:45:13,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121647240] [2021-12-06 23:45:13,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121647240] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:45:13,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5775431] [2021-12-06 23:45:13,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 23:45:13,693 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:45:13,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d00228-545a-4659-8a58-acb8990aa2e0/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:45:13,694 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d00228-545a-4659-8a58-acb8990aa2e0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:45:13,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d00228-545a-4659-8a58-acb8990aa2e0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 23:45:13,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 23:45:13,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:45:13,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 23:45:13,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:45:13,915 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 23:45:13,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:45:14,101 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 23:45:14,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5775431] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:45:14,101 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:45:14,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2021-12-06 23:45:14,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766133694] [2021-12-06 23:45:14,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:45:14,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 23:45:14,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:45:14,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 23:45:14,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-12-06 23:45:14,102 INFO L87 Difference]: Start difference. First operand 79 states and 96 transitions. Second operand has 19 states, 19 states have (on average 4.052631578947368) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:45:14,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:45:14,401 INFO L93 Difference]: Finished difference Result 182 states and 221 transitions. [2021-12-06 23:45:14,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 23:45:14,402 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.052631578947368) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-12-06 23:45:14,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:45:14,403 INFO L225 Difference]: With dead ends: 182 [2021-12-06 23:45:14,403 INFO L226 Difference]: Without dead ends: 138 [2021-12-06 23:45:14,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 59 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-12-06 23:45:14,403 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 156 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:45:14,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 230 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 23:45:14,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-12-06 23:45:14,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 122. [2021-12-06 23:45:14,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.1818181818181819) internal successors, (143), 121 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:45:14,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 143 transitions. [2021-12-06 23:45:14,412 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 143 transitions. Word has length 35 [2021-12-06 23:45:14,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:45:14,412 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 143 transitions. [2021-12-06 23:45:14,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.052631578947368) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:45:14,413 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 143 transitions. [2021-12-06 23:45:14,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-06 23:45:14,413 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:45:14,413 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:45:14,432 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d00228-545a-4659-8a58-acb8990aa2e0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-06 23:45:14,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d00228-545a-4659-8a58-acb8990aa2e0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-06 23:45:14,614 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:45:14,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:45:14,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1379930067, now seen corresponding path program 1 times [2021-12-06 23:45:14,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:45:14,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935000301] [2021-12-06 23:45:14,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:45:14,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:45:14,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:45:15,294 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:45:15,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:45:15,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935000301] [2021-12-06 23:45:15,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935000301] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:45:15,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983025729] [2021-12-06 23:45:15,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:45:15,294 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:45:15,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d00228-545a-4659-8a58-acb8990aa2e0/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:45:15,295 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d00228-545a-4659-8a58-acb8990aa2e0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:45:15,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52d00228-545a-4659-8a58-acb8990aa2e0/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 23:45:15,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:45:15,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-06 23:45:15,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:45:15,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:45:15,461 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 33 [2021-12-06 23:45:15,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:45:15,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:45:15,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:45:15,554 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 23:45:15,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 32 [2021-12-06 23:45:15,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:45:15,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:45:15,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:45:15,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:45:15,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:45:15,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:45:15,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:45:15,724 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-12-06 23:45:15,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 58 [2021-12-06 23:45:15,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:45:15,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:45:15,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:45:15,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:45:15,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:45:16,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:45:16,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:45:16,019 INFO L354 Elim1Store]: treesize reduction 61, result has 29.1 percent of original size [2021-12-06 23:45:16,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 47 treesize of output 61 [2021-12-06 23:45:16,104 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 23:45:16,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 26 treesize of output 10 [2021-12-06 23:45:16,140 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 23:45:16,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:45:56,092 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 121 treesize of output 111 [2021-12-06 23:45:56,206 INFO L354 Elim1Store]: treesize reduction 60, result has 58.6 percent of original size [2021-12-06 23:45:56,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 3487 treesize of output 3419