./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/s4lif.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/s4lif.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y --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 b9b6be32708c9c869a7ef906994ed167b62b1be5ed541f61924ceda8b83e642a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:37:20,041 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:37:20,043 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:37:20,079 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:37:20,084 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:37:20,089 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:37:20,092 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:37:20,096 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:37:20,100 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:37:20,107 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:37:20,109 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:37:20,110 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:37:20,111 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:37:20,114 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:37:20,116 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:37:20,119 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:37:20,122 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:37:20,123 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:37:20,129 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:37:20,133 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:37:20,137 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:37:20,140 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:37:20,141 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:37:20,142 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:37:20,146 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:37:20,147 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:37:20,147 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:37:20,148 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:37:20,149 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:37:20,150 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:37:20,151 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:37:20,152 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:37:20,153 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:37:20,153 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:37:20,155 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:37:20,155 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:37:20,156 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:37:20,157 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:37:20,157 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:37:20,158 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:37:20,159 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:37:20,160 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-13 18:37:20,188 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:37:20,188 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:37:20,189 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:37:20,189 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:37:20,190 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:37:20,191 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:37:20,192 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:37:20,192 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:37:20,192 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:37:20,193 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:37:20,193 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 18:37:20,194 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 18:37:20,194 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 18:37:20,194 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:37:20,195 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 18:37:20,195 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:37:20,196 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 18:37:20,196 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 18:37:20,196 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 18:37:20,197 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:37:20,197 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 18:37:20,198 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:37:20,198 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:37:20,198 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:37:20,199 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:37:20,199 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:37:20,200 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:37:20,200 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 18:37:20,201 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 18:37:20,201 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 18:37:20,201 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 18:37:20,202 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 18:37:20,202 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 18:37:20,203 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:37:20,210 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_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b9b6be32708c9c869a7ef906994ed167b62b1be5ed541f61924ceda8b83e642a [2021-11-13 18:37:20,466 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:37:20,488 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:37:20,490 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:37:20,492 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:37:20,493 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:37:20,494 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/array-fpi/s4lif.c [2021-11-13 18:37:20,570 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/data/278ff9adf/bbfd6189654247cdbc50e197ca277438/FLAGb95619795 [2021-11-13 18:37:21,090 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:37:21,091 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/sv-benchmarks/c/array-fpi/s4lif.c [2021-11-13 18:37:21,097 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/data/278ff9adf/bbfd6189654247cdbc50e197ca277438/FLAGb95619795 [2021-11-13 18:37:21,444 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/data/278ff9adf/bbfd6189654247cdbc50e197ca277438 [2021-11-13 18:37:21,447 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:37:21,450 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 18:37:21,454 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:37:21,454 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:37:21,457 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:37:21,458 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:37:21" (1/1) ... [2021-11-13 18:37:21,459 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d4c543b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:37:21, skipping insertion in model container [2021-11-13 18:37:21,460 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:37:21" (1/1) ... [2021-11-13 18:37:21,467 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:37:21,480 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:37:21,678 WARN L228 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_fa262f98-f629-4957-b60d-b7ec5332ddc8/sv-benchmarks/c/array-fpi/s4lif.c[588,601] [2021-11-13 18:37:21,697 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:37:21,705 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:37:21,717 WARN L228 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_fa262f98-f629-4957-b60d-b7ec5332ddc8/sv-benchmarks/c/array-fpi/s4lif.c[588,601] [2021-11-13 18:37:21,727 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:37:21,740 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:37:21,741 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:37:21 WrapperNode [2021-11-13 18:37:21,741 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:37:21,742 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 18:37:21,742 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 18:37:21,742 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 18:37:21,750 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:37:21" (1/1) ... [2021-11-13 18:37:21,758 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:37:21" (1/1) ... [2021-11-13 18:37:21,780 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 18:37:21,780 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:37:21,781 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:37:21,781 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:37:21,789 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:37:21" (1/1) ... [2021-11-13 18:37:21,789 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:37:21" (1/1) ... [2021-11-13 18:37:21,792 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:37:21" (1/1) ... [2021-11-13 18:37:21,792 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:37:21" (1/1) ... [2021-11-13 18:37:21,799 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:37:21" (1/1) ... [2021-11-13 18:37:21,803 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:37:21" (1/1) ... [2021-11-13 18:37:21,805 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:37:21" (1/1) ... [2021-11-13 18:37:21,807 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:37:21,808 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:37:21,808 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:37:21,808 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:37:21,809 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:37:21" (1/1) ... [2021-11-13 18:37:21,817 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:37:21,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:37:21,844 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:37:21,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:37:21,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 18:37:21,900 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:37:21,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-13 18:37:21,900 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 18:37:21,901 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:37:21,901 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:37:21,901 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-13 18:37:21,901 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 18:37:22,193 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:37:22,193 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-13 18:37:22,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:37:22 BoogieIcfgContainer [2021-11-13 18:37:22,196 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:37:22,198 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:37:22,198 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:37:22,220 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:37:22,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:37:21" (1/3) ... [2021-11-13 18:37:22,221 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4decddd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:37:22, skipping insertion in model container [2021-11-13 18:37:22,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:37:21" (2/3) ... [2021-11-13 18:37:22,222 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4decddd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:37:22, skipping insertion in model container [2021-11-13 18:37:22,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:37:22" (3/3) ... [2021-11-13 18:37:22,224 INFO L111 eAbstractionObserver]: Analyzing ICFG s4lif.c [2021-11-13 18:37:22,229 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:37:22,230 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 18:37:22,314 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:37:22,330 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 [2021-11-13 18:37:22,330 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 18:37:22,353 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) [2021-11-13 18:37:22,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-13 18:37:22,359 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:37:22,361 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:37:22,362 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:37:22,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:37:22,368 INFO L85 PathProgramCache]: Analyzing trace with hash -845640729, now seen corresponding path program 1 times [2021-11-13 18:37:22,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:37:22,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155348693] [2021-11-13 18:37:22,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:37:22,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:37:22,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:37:22,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:37:22,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:37:22,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155348693] [2021-11-13 18:37:22,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155348693] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:37:22,538 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:37:22,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 18:37:22,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370501361] [2021-11-13 18:37:22,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:37:22,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-13 18:37:22,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:37:22,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-13 18:37:22,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 18:37:22,602 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 6.5) internal successors, (13), 2 states have internal predecessors, (13), 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) [2021-11-13 18:37:22,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:37:22,619 INFO L93 Difference]: Finished difference Result 40 states and 56 transitions. [2021-11-13 18:37:22,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-13 18:37:22,620 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 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 13 [2021-11-13 18:37:22,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:37:22,629 INFO L225 Difference]: With dead ends: 40 [2021-11-13 18:37:22,629 INFO L226 Difference]: Without dead ends: 18 [2021-11-13 18:37:22,633 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 [2021-11-13 18:37:22,637 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.90ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-13 18:37:22,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.90ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-13 18:37:22,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-13 18:37:22,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-11-13 18:37:22,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 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) [2021-11-13 18:37:22,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-11-13 18:37:22,674 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 13 [2021-11-13 18:37:22,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:37:22,675 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-11-13 18:37:22,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 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) [2021-11-13 18:37:22,675 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-11-13 18:37:22,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-13 18:37:22,676 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:37:22,676 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:37:22,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 18:37:22,677 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:37:22,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:37:22,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1238667739, now seen corresponding path program 1 times [2021-11-13 18:37:22,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:37:22,679 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840565093] [2021-11-13 18:37:22,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:37:22,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:37:22,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:37:22,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:37:22,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:37:22,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840565093] [2021-11-13 18:37:22,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840565093] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:37:22,820 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:37:22,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:37:22,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204364855] [2021-11-13 18:37:22,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:37:22,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:37:22,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:37:22,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:37:22,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:37:22,826 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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) [2021-11-13 18:37:22,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:37:22,914 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2021-11-13 18:37:22,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:37:22,915 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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 13 [2021-11-13 18:37:22,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:37:22,916 INFO L225 Difference]: With dead ends: 36 [2021-11-13 18:37:22,916 INFO L226 Difference]: Without dead ends: 25 [2021-11-13 18:37:22,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:37:22,919 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 59.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.55ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 75.69ms IncrementalHoareTripleChecker+Time [2021-11-13 18:37:22,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 11 Invalid, 37 Unknown, 0 Unchecked, 1.55ms Time], IncrementalHoareTripleChecker [7 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 75.69ms Time] [2021-11-13 18:37:22,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-13 18:37:22,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2021-11-13 18:37:22,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 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) [2021-11-13 18:37:22,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2021-11-13 18:37:22,926 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 13 [2021-11-13 18:37:22,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:37:22,926 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2021-11-13 18:37:22,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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) [2021-11-13 18:37:22,927 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2021-11-13 18:37:22,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-13 18:37:22,928 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:37:22,928 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:37:22,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 18:37:22,928 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:37:22,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:37:22,929 INFO L85 PathProgramCache]: Analyzing trace with hash 2001188913, now seen corresponding path program 1 times [2021-11-13 18:37:22,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:37:22,930 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10607607] [2021-11-13 18:37:22,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:37:22,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:37:23,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:37:23,750 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:37:23,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:37:23,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10607607] [2021-11-13 18:37:23,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10607607] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:37:23,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143796642] [2021-11-13 18:37:23,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:37:23,752 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:37:23,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:37:23,758 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:37:23,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 18:37:23,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:37:23,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-13 18:37:23,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:37:23,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-13 18:37:23,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-13 18:37:24,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-13 18:37:24,525 INFO L354 Elim1Store]: treesize reduction 53, result has 1.9 percent of original size [2021-11-13 18:37:24,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 34 [2021-11-13 18:37:24,715 INFO L354 Elim1Store]: treesize reduction 39, result has 15.2 percent of original size [2021-11-13 18:37:24,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 27 [2021-11-13 18:37:24,855 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-13 18:37:24,856 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 60 treesize of output 40 [2021-11-13 18:37:24,898 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:37:24,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:37:25,480 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 18:37:25,480 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 724 treesize of output 596 [2021-11-13 18:37:25,504 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-13 18:37:25,505 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 596 treesize of output 560 [2021-11-13 18:37:25,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 792 treesize of output 758 [2021-11-13 18:37:25,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 752 treesize of output 750 [2021-11-13 18:37:25,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 746 treesize of output 744 [2021-11-13 18:37:26,634 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:37:26,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143796642] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:37:26,636 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:37:26,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 31 [2021-11-13 18:37:26,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543099358] [2021-11-13 18:37:26,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:37:26,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-13 18:37:26,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:37:26,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-13 18:37:26,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=748, Unknown=0, NotChecked=0, Total=930 [2021-11-13 18:37:26,643 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 states have internal predecessors, (48), 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) [2021-11-13 18:37:27,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:37:27,077 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2021-11-13 18:37:27,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-13 18:37:27,078 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 states have internal predecessors, (48), 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 20 [2021-11-13 18:37:27,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:37:27,081 INFO L225 Difference]: With dead ends: 45 [2021-11-13 18:37:27,081 INFO L226 Difference]: Without dead ends: 40 [2021-11-13 18:37:27,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=229, Invalid=1031, Unknown=0, NotChecked=0, Total=1260 [2021-11-13 18:37:27,087 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 12 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 124.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.91ms SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 150.73ms IncrementalHoareTripleChecker+Time [2021-11-13 18:37:27,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 66 Invalid, 185 Unknown, 0 Unchecked, 4.91ms Time], IncrementalHoareTripleChecker [21 Valid, 131 Invalid, 0 Unknown, 33 Unchecked, 150.73ms Time] [2021-11-13 18:37:27,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-13 18:37:27,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2021-11-13 18:37:27,103 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) [2021-11-13 18:37:27,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2021-11-13 18:37:27,105 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 20 [2021-11-13 18:37:27,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:37:27,106 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2021-11-13 18:37:27,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 states have internal predecessors, (48), 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) [2021-11-13 18:37:27,107 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2021-11-13 18:37:27,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-13 18:37:27,109 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:37:27,109 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:37:27,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 18:37:27,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:37:27,331 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:37:27,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:37:27,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1608161903, now seen corresponding path program 1 times [2021-11-13 18:37:27,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:37:27,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701976794] [2021-11-13 18:37:27,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:37:27,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:37:27,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:37:27,484 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:37:27,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:37:27,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701976794] [2021-11-13 18:37:27,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701976794] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:37:27,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362901287] [2021-11-13 18:37:27,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:37:27,487 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:37:27,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:37:27,495 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:37:27,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 18:37:27,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:37:27,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-13 18:37:27,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:37:27,588 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 18 treesize of output 14 [2021-11-13 18:37:27,627 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 15 treesize of output 7 [2021-11-13 18:37:27,648 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:37:27,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:37:27,694 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 14 treesize of output 12 [2021-11-13 18:37:27,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-11-13 18:37:27,713 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:37:27,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362901287] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:37:27,713 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:37:27,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2021-11-13 18:37:27,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910557272] [2021-11-13 18:37:27,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:37:27,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-13 18:37:27,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:37:27,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-13 18:37:27,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-13 18:37:27,717 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 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) [2021-11-13 18:37:27,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:37:27,816 INFO L93 Difference]: Finished difference Result 49 states and 60 transitions. [2021-11-13 18:37:27,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 18:37:27,818 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 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 20 [2021-11-13 18:37:27,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:37:27,824 INFO L225 Difference]: With dead ends: 49 [2021-11-13 18:37:27,824 INFO L226 Difference]: Without dead ends: 38 [2021-11-13 18:37:27,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-13 18:37:27,829 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 7 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 50.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.92ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 62.51ms IncrementalHoareTripleChecker+Time [2021-11-13 18:37:27,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 56 Invalid, 88 Unknown, 0 Unchecked, 3.92ms Time], IncrementalHoareTripleChecker [6 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 62.51ms Time] [2021-11-13 18:37:27,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-13 18:37:27,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2021-11-13 18:37:27,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 34 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) [2021-11-13 18:37:27,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2021-11-13 18:37:27,849 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 20 [2021-11-13 18:37:27,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:37:27,853 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2021-11-13 18:37:27,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 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) [2021-11-13 18:37:27,854 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2021-11-13 18:37:27,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-13 18:37:27,855 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:37:27,856 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:37:27,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 18:37:28,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:37:28,063 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:37:28,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:37:28,063 INFO L85 PathProgramCache]: Analyzing trace with hash -949569453, now seen corresponding path program 2 times [2021-11-13 18:37:28,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:37:28,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494331342] [2021-11-13 18:37:28,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:37:28,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:37:28,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:37:28,128 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:37:28,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:37:28,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494331342] [2021-11-13 18:37:28,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494331342] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:37:28,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625861008] [2021-11-13 18:37:28,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:37:28,130 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:37:28,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:37:28,131 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:37:28,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 18:37:28,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:37:28,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:37:28,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 18:37:28,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:37:28,263 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:37:28,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:37:28,315 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:37:28,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625861008] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:37:28,317 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:37:28,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-11-13 18:37:28,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728948136] [2021-11-13 18:37:28,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:37:28,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-13 18:37:28,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:37:28,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-13 18:37:28,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:37:28,319 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 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) [2021-11-13 18:37:28,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:37:28,443 INFO L93 Difference]: Finished difference Result 70 states and 81 transitions. [2021-11-13 18:37:28,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 18:37:28,444 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 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 [2021-11-13 18:37:28,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:37:28,445 INFO L225 Difference]: With dead ends: 70 [2021-11-13 18:37:28,445 INFO L226 Difference]: Without dead ends: 44 [2021-11-13 18:37:28,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-11-13 18:37:28,449 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 62 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 67.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.46ms SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 85.68ms IncrementalHoareTripleChecker+Time [2021-11-13 18:37:28,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 28 Invalid, 117 Unknown, 0 Unchecked, 4.46ms Time], IncrementalHoareTripleChecker [31 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 85.68ms Time] [2021-11-13 18:37:28,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-13 18:37:28,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 30. [2021-11-13 18:37:28,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 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) [2021-11-13 18:37:28,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-11-13 18:37:28,457 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 22 [2021-11-13 18:37:28,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:37:28,457 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-11-13 18:37:28,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 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) [2021-11-13 18:37:28,457 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-11-13 18:37:28,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-13 18:37:28,458 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:37:28,458 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:37:28,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-13 18:37:28,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:37:28,659 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:37:28,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:37:28,659 INFO L85 PathProgramCache]: Analyzing trace with hash -2105967953, now seen corresponding path program 3 times [2021-11-13 18:37:28,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:37:28,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737415357] [2021-11-13 18:37:28,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:37:28,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:37:28,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:37:28,747 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:37:28,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:37:28,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737415357] [2021-11-13 18:37:28,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737415357] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:37:28,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69863018] [2021-11-13 18:37:28,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:37:28,748 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:37:28,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:37:28,749 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:37:28,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 18:37:28,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-13 18:37:28,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:37:28,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 18:37:28,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:37:28,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:37:28,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:37:28,977 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:37:28,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69863018] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:37:28,978 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:37:28,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-11-13 18:37:28,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309159200] [2021-11-13 18:37:28,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:37:28,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-13 18:37:28,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:37:28,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-13 18:37:28,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:37:28,981 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 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) [2021-11-13 18:37:29,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:37:29,116 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2021-11-13 18:37:29,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 18:37:29,117 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 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 [2021-11-13 18:37:29,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:37:29,117 INFO L225 Difference]: With dead ends: 39 [2021-11-13 18:37:29,117 INFO L226 Difference]: Without dead ends: 31 [2021-11-13 18:37:29,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-11-13 18:37:29,119 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 51 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 78.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.81ms SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 92.75ms IncrementalHoareTripleChecker+Time [2021-11-13 18:37:29,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 27 Invalid, 137 Unknown, 0 Unchecked, 1.81ms Time], IncrementalHoareTripleChecker [28 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 92.75ms Time] [2021-11-13 18:37:29,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-13 18:37:29,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2021-11-13 18:37:29,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 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) [2021-11-13 18:37:29,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-11-13 18:37:29,123 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 22 [2021-11-13 18:37:29,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:37:29,124 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-11-13 18:37:29,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 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) [2021-11-13 18:37:29,124 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-11-13 18:37:29,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-13 18:37:29,125 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:37:29,125 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:37:29,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-13 18:37:29,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:37:29,340 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:37:29,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:37:29,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1032594067, now seen corresponding path program 4 times [2021-11-13 18:37:29,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:37:29,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005979706] [2021-11-13 18:37:29,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:37:29,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:37:29,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:37:30,279 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:37:30,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:37:30,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005979706] [2021-11-13 18:37:30,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005979706] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:37:30,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809377600] [2021-11-13 18:37:30,280 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:37:30,281 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:37:30,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:37:30,295 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:37:30,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-13 18:37:30,336 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:37:30,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:37:30,338 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-13 18:37:30,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:37:30,360 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 11 treesize of output 7 [2021-11-13 18:37:30,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:37:30,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-13 18:37:30,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:37:30,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:37:30,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-11-13 18:37:30,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:37:30,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:37:30,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:37:30,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 39 [2021-11-13 18:37:31,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:37:31,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:37:31,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2021-11-13 18:37:31,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:37:31,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:37:31,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:37:31,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 39 [2021-11-13 18:37:31,585 INFO L354 Elim1Store]: treesize reduction 76, result has 16.5 percent of original size [2021-11-13 18:37:31,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 48 treesize of output 38 [2021-11-13 18:37:31,742 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-13 18:37:31,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 46 [2021-11-13 18:37:31,788 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:37:31,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:37:33,937 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:37:33,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809377600] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:37:33,938 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:37:33,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 52 [2021-11-13 18:37:33,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248273754] [2021-11-13 18:37:33,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:37:33,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-13 18:37:33,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:37:33,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-13 18:37:33,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=2309, Unknown=0, NotChecked=0, Total=2652 [2021-11-13 18:37:33,942 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 52 states, 52 states have (on average 1.3076923076923077) internal successors, (68), 52 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) [2021-11-13 18:37:47,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:37:47,423 INFO L93 Difference]: Finished difference Result 85 states and 103 transitions. [2021-11-13 18:37:47,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-13 18:37:47,424 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.3076923076923077) internal successors, (68), 52 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 27 [2021-11-13 18:37:47,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:37:47,424 INFO L225 Difference]: With dead ends: 85 [2021-11-13 18:37:47,425 INFO L226 Difference]: Without dead ends: 69 [2021-11-13 18:37:47,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2197 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=933, Invalid=5873, Unknown=0, NotChecked=0, Total=6806 [2021-11-13 18:37:47,429 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 77 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1309.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.91ms SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 1443.98ms IncrementalHoareTripleChecker+Time [2021-11-13 18:37:47,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 88 Invalid, 907 Unknown, 0 Unchecked, 6.91ms Time], IncrementalHoareTripleChecker [263 Valid, 638 Invalid, 0 Unknown, 6 Unchecked, 1443.98ms Time] [2021-11-13 18:37:47,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-13 18:37:47,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 45. [2021-11-13 18:37:47,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.2045454545454546) internal successors, (53), 44 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) [2021-11-13 18:37:47,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2021-11-13 18:37:47,439 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 27 [2021-11-13 18:37:47,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:37:47,439 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2021-11-13 18:37:47,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.3076923076923077) internal successors, (68), 52 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) [2021-11-13 18:37:47,440 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2021-11-13 18:37:47,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-13 18:37:47,441 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:37:47,441 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:37:47,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-13 18:37:47,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-13 18:37:47,659 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:37:47,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:37:47,659 INFO L85 PathProgramCache]: Analyzing trace with hash -132219249, now seen corresponding path program 5 times [2021-11-13 18:37:47,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:37:47,659 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413377654] [2021-11-13 18:37:47,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:37:47,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:37:47,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:37:47,750 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 18:37:47,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:37:47,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413377654] [2021-11-13 18:37:47,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413377654] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:37:47,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249169726] [2021-11-13 18:37:47,751 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:37:47,751 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:37:47,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:37:47,752 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:37:47,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-13 18:37:47,826 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-13 18:37:47,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:37:47,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 18:37:47,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:37:47,955 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 18:37:47,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:37:48,035 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 18:37:48,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249169726] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:37:48,035 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:37:48,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-11-13 18:37:48,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160875192] [2021-11-13 18:37:48,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:37:48,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-13 18:37:48,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:37:48,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-13 18:37:48,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-11-13 18:37:48,038 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 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) [2021-11-13 18:37:48,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:37:48,193 INFO L93 Difference]: Finished difference Result 89 states and 102 transitions. [2021-11-13 18:37:48,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-13 18:37:48,193 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 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 29 [2021-11-13 18:37:48,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:37:48,194 INFO L225 Difference]: With dead ends: 89 [2021-11-13 18:37:48,194 INFO L226 Difference]: Without dead ends: 55 [2021-11-13 18:37:48,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-11-13 18:37:48,195 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 76 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 95.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.46ms SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 118.41ms IncrementalHoareTripleChecker+Time [2021-11-13 18:37:48,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 33 Invalid, 195 Unknown, 0 Unchecked, 1.46ms Time], IncrementalHoareTripleChecker [49 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 118.41ms Time] [2021-11-13 18:37:48,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-13 18:37:48,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 41. [2021-11-13 18:37:48,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.15) internal successors, (46), 40 states have internal predecessors, (46), 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) [2021-11-13 18:37:48,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2021-11-13 18:37:48,205 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 29 [2021-11-13 18:37:48,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:37:48,206 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2021-11-13 18:37:48,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 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) [2021-11-13 18:37:48,206 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2021-11-13 18:37:48,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-13 18:37:48,207 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:37:48,207 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:37:48,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-13 18:37:48,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-13 18:37:48,423 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:37:48,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:37:48,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1034208275, now seen corresponding path program 1 times [2021-11-13 18:37:48,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:37:48,423 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602862604] [2021-11-13 18:37:48,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:37:48,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:37:48,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:37:48,510 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 18:37:48,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:37:48,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602862604] [2021-11-13 18:37:48,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602862604] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:37:48,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255238069] [2021-11-13 18:37:48,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:37:48,512 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:37:48,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:37:48,513 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:37:48,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-13 18:37:48,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:37:48,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 18:37:48,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:37:48,674 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 18:37:48,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:37:48,757 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 18:37:48,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255238069] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:37:48,757 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:37:48,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-11-13 18:37:48,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159014284] [2021-11-13 18:37:48,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:37:48,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-13 18:37:48,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:37:48,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-13 18:37:48,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-11-13 18:37:48,762 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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) [2021-11-13 18:37:48,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:37:48,936 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2021-11-13 18:37:48,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-13 18:37:48,937 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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) Word has length 29 [2021-11-13 18:37:48,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:37:48,938 INFO L225 Difference]: With dead ends: 50 [2021-11-13 18:37:48,938 INFO L226 Difference]: Without dead ends: 40 [2021-11-13 18:37:48,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-11-13 18:37:48,939 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 73 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 93.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.04ms SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 113.03ms IncrementalHoareTripleChecker+Time [2021-11-13 18:37:48,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 27 Invalid, 191 Unknown, 0 Unchecked, 2.04ms Time], IncrementalHoareTripleChecker [44 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 113.03ms Time] [2021-11-13 18:37:48,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-13 18:37:48,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2021-11-13 18:37:48,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 34 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) [2021-11-13 18:37:48,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-11-13 18:37:48,947 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 29 [2021-11-13 18:37:48,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:37:48,948 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-11-13 18:37:48,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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) [2021-11-13 18:37:48,948 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-11-13 18:37:48,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-13 18:37:48,949 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:37:48,949 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:37:48,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-13 18:37:49,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:37:49,167 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:37:49,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:37:49,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1250534543, now seen corresponding path program 6 times [2021-11-13 18:37:49,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:37:49,167 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627756008] [2021-11-13 18:37:49,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:37:49,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:37:49,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:37:50,833 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:37:50,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:37:50,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627756008] [2021-11-13 18:37:50,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627756008] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:37:50,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649217826] [2021-11-13 18:37:50,834 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:37:50,834 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:37:50,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:37:50,835 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:37:50,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-13 18:37:50,889 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-13 18:37:50,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:37:50,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-13 18:37:50,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:37:50,913 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 11 treesize of output 7 [2021-11-13 18:37:50,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:37:50,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-13 18:37:51,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:37:51,139 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-11-13 18:37:51,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2021-11-13 18:37:51,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:37:51,356 INFO L354 Elim1Store]: treesize reduction 88, result has 20.7 percent of original size [2021-11-13 18:37:51,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 63 [2021-11-13 18:37:52,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:37:52,228 INFO L354 Elim1Store]: treesize reduction 186, result has 23.8 percent of original size [2021-11-13 18:37:52,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 95 treesize of output 111 [2021-11-13 18:37:53,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:37:53,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:37:53,217 INFO L354 Elim1Store]: treesize reduction 132, result has 22.8 percent of original size [2021-11-13 18:37:53,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 92 treesize of output 100 [2021-11-13 18:37:54,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:37:54,948 INFO L354 Elim1Store]: treesize reduction 197, result has 8.8 percent of original size [2021-11-13 18:37:54,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 94 treesize of output 75 [2021-11-13 18:37:55,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:37:55,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:37:55,645 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-11-13 18:37:55,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 81 treesize of output 74 [2021-11-13 18:37:55,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:37:55,936 INFO L354 Elim1Store]: treesize reduction 84, result has 1.2 percent of original size [2021-11-13 18:37:55,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 81 treesize of output 81 [2021-11-13 18:37:56,330 INFO L354 Elim1Store]: treesize reduction 334, result has 11.6 percent of original size [2021-11-13 18:37:56,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 96 treesize of output 99 [2021-11-13 18:37:57,114 INFO L354 Elim1Store]: treesize reduction 174, result has 3.9 percent of original size [2021-11-13 18:37:57,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 108 treesize of output 74 [2021-11-13 18:37:57,193 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:37:57,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:40:56,807 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_111| Int)) (or (< (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_111|) (forall ((|v_ULTIMATE.start_main_~i~0#1_103| Int) (|v_ULTIMATE.start_main_~i~0#1_102| Int) (|v_ULTIMATE.start_main_~i~0#1_110| Int) (|v_ULTIMATE.start_main_~i~0#1_107| Int) (|v_ULTIMATE.start_main_~i~0#1_106| Int)) (let ((.cse18 (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_111| 4)) 1) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_110| 4)) 1))) (let ((.cse0 (select .cse18 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse16 (store .cse18 |c_ULTIMATE.start_main_~a~0#1.offset| (+ 4 .cse0))) (.cse17 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_107| 4)))) (let ((.cse2 (select .cse16 .cse17))) (let ((.cse14 (store .cse16 .cse17 (+ .cse2 4))) (.cse15 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_106| 4)))) (let ((.cse1 (select .cse14 .cse15))) (or (< 1 |v_ULTIMATE.start_main_~i~0#1_103|) (< (+ |v_ULTIMATE.start_main_~i~0#1_103| 1) |v_ULTIMATE.start_main_~i~0#1_102|) (not (= .cse0 1)) (not (= .cse1 1)) (< (+ |v_ULTIMATE.start_main_~i~0#1_111| 1) |v_ULTIMATE.start_main_~i~0#1_110|) (not (= .cse2 1)) (let ((.cse13 (store .cse14 .cse15 (+ .cse1 4)))) (let ((.cse11 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse13))) (let ((.cse12 (select .cse11 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse6 (select .cse13 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse7 (select .cse12 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse8 (select (select (store .cse11 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse12 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse6 .cse7))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_103| 4)))) (.cse5 (+ |v_ULTIMATE.start_main_~i~0#1_106| 1))) (let ((.cse3 (<= .cse5 |v_ULTIMATE.start_main_~i~0#1_107|)) (.cse4 (<= (+ |v_ULTIMATE.start_main_~i~0#1_102| 1) |v_ULTIMATE.start_main_~i~0#1_106|)) (.cse9 (select (select (store .cse11 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse12 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse6 .cse7 .cse8))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_102| 4)))) (.cse10 (<= (+ |v_ULTIMATE.start_main_~i~0#1_110| 1) |v_ULTIMATE.start_main_~i~0#1_106|))) (and (or .cse3 .cse4 (<= .cse5 (div (+ .cse6 .cse7 .cse8 .cse9) 5)) .cse10) (or .cse3 .cse4 (<= (div (+ (* .cse8 (- 1)) (* .cse9 (- 1)) (* .cse7 (- 1)) (* .cse6 (- 1))) (- 5)) .cse5) .cse10)))))))) (< |v_ULTIMATE.start_main_~i~0#1_107| 1))))))))))) is different from false [2021-11-13 18:41:13,334 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_103| Int) (|v_ULTIMATE.start_main_~i~0#1_102| Int) (|v_ULTIMATE.start_main_~i~0#1_110| Int) (|v_ULTIMATE.start_main_~i~0#1_111| Int) (|v_ULTIMATE.start_main_~i~0#1_107| Int) (|v_ULTIMATE.start_main_~i~0#1_106| Int)) (let ((.cse18 (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)) 1) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_111| 4)) 1) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_110| 4)) 1))) (let ((.cse0 (select .cse18 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse16 (store .cse18 |c_ULTIMATE.start_main_~a~0#1.offset| (+ .cse0 4))) (.cse17 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_107| 4)))) (let ((.cse1 (select .cse16 .cse17))) (let ((.cse13 (store .cse16 .cse17 (+ .cse1 4))) (.cse14 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_106| 4)))) (let ((.cse15 (select .cse13 .cse14))) (or (< 1 |v_ULTIMATE.start_main_~i~0#1_103|) (< (+ |v_ULTIMATE.start_main_~i~0#1_103| 1) |v_ULTIMATE.start_main_~i~0#1_102|) (not (= .cse0 1)) (not (= .cse1 1)) (< (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_111|) (< (+ |v_ULTIMATE.start_main_~i~0#1_111| 1) |v_ULTIMATE.start_main_~i~0#1_110|) (let ((.cse12 (store .cse13 .cse14 (+ .cse15 4)))) (let ((.cse10 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse12))) (let ((.cse11 (select .cse10 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse5 (select .cse11 |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse6 (select .cse12 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse7 (select (select (store .cse10 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse11 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse5 .cse6))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_103| 4)))) (.cse9 (+ |v_ULTIMATE.start_main_~i~0#1_106| 1))) (let ((.cse2 (<= .cse9 |v_ULTIMATE.start_main_~i~0#1_107|)) (.cse8 (select (select (store .cse10 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse11 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse5 .cse6 .cse7))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_102| 4)))) (.cse3 (<= (+ |v_ULTIMATE.start_main_~i~0#1_102| 1) |v_ULTIMATE.start_main_~i~0#1_106|)) (.cse4 (<= (+ |v_ULTIMATE.start_main_~i~0#1_110| 1) |v_ULTIMATE.start_main_~i~0#1_106|))) (and (or .cse2 .cse3 .cse4 (<= (div (+ (* .cse5 (- 1)) (* .cse6 (- 1)) (* .cse7 (- 1)) (* .cse8 (- 1))) (- 5)) .cse9)) (or .cse2 (<= .cse9 (div (+ .cse5 .cse6 .cse7 .cse8) 5)) .cse3 .cse4)))))))) (not (= .cse15 1)) (< |v_ULTIMATE.start_main_~i~0#1_107| 1))))))))) is different from false [2021-11-13 18:41:13,424 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 22 refuted. 3 times theorem prover too weak. 0 trivial. 5 not checked. [2021-11-13 18:41:13,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649217826] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:41:13,424 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:41:13,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 30, 30] total 80 [2021-11-13 18:41:13,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833767886] [2021-11-13 18:41:13,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:41:13,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-11-13 18:41:13,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:41:13,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-11-13 18:41:13,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=728, Invalid=5234, Unknown=52, NotChecked=306, Total=6320 [2021-11-13 18:41:13,428 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 80 states, 80 states have (on average 1.1375) internal successors, (91), 80 states have internal predecessors, (91), 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) [2021-11-13 18:41:50,896 WARN L227 SmtUtils]: Spent 5.27s on a formula simplification. DAG size of input: 119 DAG size of output: 59 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 18:42:10,110 WARN L227 SmtUtils]: Spent 17.04s on a formula simplification that was a NOOP. DAG size: 124 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 18:42:35,769 WARN L227 SmtUtils]: Spent 6.29s on a formula simplification that was a NOOP. DAG size: 108 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 18:43:44,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:43:44,811 INFO L93 Difference]: Finished difference Result 90 states and 108 transitions. [2021-11-13 18:43:44,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-11-13 18:43:44,811 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.1375) internal successors, (91), 80 states have internal predecessors, (91), 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 [2021-11-13 18:43:44,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:43:44,812 INFO L225 Difference]: With dead ends: 90 [2021-11-13 18:43:44,813 INFO L226 Difference]: Without dead ends: 85 [2021-11-13 18:43:44,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 105 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 3183 ImplicationChecksByTransitivity, 288.2s TimeCoverageRelationStatistics Valid=1288, Invalid=9542, Unknown=98, NotChecked=414, Total=11342 [2021-11-13 18:43:44,817 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 8 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 70.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.23ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 168 IncrementalHoareTripleChecker+Unchecked, 78.85ms IncrementalHoareTripleChecker+Time [2021-11-13 18:43:44,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 118 Invalid, 227 Unknown, 0 Unchecked, 1.23ms Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 168 Unchecked, 78.85ms Time] [2021-11-13 18:43:44,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-11-13 18:43:44,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 72. [2021-11-13 18:43:44,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.2535211267605635) internal successors, (89), 71 states have internal predecessors, (89), 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) [2021-11-13 18:43:44,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 89 transitions. [2021-11-13 18:43:44,835 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 89 transitions. Word has length 34 [2021-11-13 18:43:44,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:43:44,835 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 89 transitions. [2021-11-13 18:43:44,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.1375) internal successors, (91), 80 states have internal predecessors, (91), 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) [2021-11-13 18:43:44,836 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 89 transitions. [2021-11-13 18:43:44,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-13 18:43:44,837 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:43:44,837 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:43:44,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-13 18:43:45,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:43:45,051 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:43:45,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:43:45,051 INFO L85 PathProgramCache]: Analyzing trace with hash 2033315503, now seen corresponding path program 2 times [2021-11-13 18:43:45,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:43:45,052 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095159032] [2021-11-13 18:43:45,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:43:45,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:43:45,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:43:45,465 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 18:43:45,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:43:45,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095159032] [2021-11-13 18:43:45,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095159032] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:43:45,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290322546] [2021-11-13 18:43:45,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:43:45,466 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:43:45,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:43:45,467 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:43:45,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-13 18:43:45,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:43:45,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:43:45,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-13 18:43:45,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:43:45,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-13 18:43:45,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:43:45,953 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 18:43:45,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 26 [2021-11-13 18:43:46,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:43:46,073 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 18:43:46,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 26 [2021-11-13 18:43:46,193 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 15 treesize of output 7 [2021-11-13 18:43:46,244 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 18:43:46,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:43:46,642 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 16 treesize of output 14 [2021-11-13 18:43:46,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-13 18:43:46,746 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 18:43:46,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290322546] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:43:46,746 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:43:46,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 19 [2021-11-13 18:43:46,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254391561] [2021-11-13 18:43:46,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:43:46,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-13 18:43:46,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:43:46,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-13 18:43:46,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-11-13 18:43:46,748 INFO L87 Difference]: Start difference. First operand 72 states and 89 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 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) [2021-11-13 18:43:47,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:43:47,687 INFO L93 Difference]: Finished difference Result 97 states and 118 transitions. [2021-11-13 18:43:47,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-13 18:43:47,688 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 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 [2021-11-13 18:43:47,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:43:47,689 INFO L225 Difference]: With dead ends: 97 [2021-11-13 18:43:47,689 INFO L226 Difference]: Without dead ends: 82 [2021-11-13 18:43:47,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 54 SyntacticMatches, 8 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-11-13 18:43:47,691 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 18 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 668.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.90ms SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 721.81ms IncrementalHoareTripleChecker+Time [2021-11-13 18:43:47,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 66 Invalid, 288 Unknown, 0 Unchecked, 2.90ms Time], IncrementalHoareTripleChecker [36 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 721.81ms Time] [2021-11-13 18:43:47,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-13 18:43:47,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 74. [2021-11-13 18:43:47,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.2328767123287672) internal successors, (90), 73 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) [2021-11-13 18:43:47,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 90 transitions. [2021-11-13 18:43:47,710 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 90 transitions. Word has length 34 [2021-11-13 18:43:47,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:43:47,711 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 90 transitions. [2021-11-13 18:43:47,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 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) [2021-11-13 18:43:47,711 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 90 transitions. [2021-11-13 18:43:47,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-13 18:43:47,713 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:43:47,713 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:43:47,742 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-11-13 18:43:47,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:43:47,926 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:43:47,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:43:47,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1456084851, now seen corresponding path program 3 times [2021-11-13 18:43:47,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:43:47,927 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748475643] [2021-11-13 18:43:47,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:43:47,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:43:47,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:43:48,626 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 18:43:48,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:43:48,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748475643] [2021-11-13 18:43:48,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748475643] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:43:48,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56826701] [2021-11-13 18:43:48,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:43:48,628 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:43:48,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:43:48,628 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:43:48,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-13 18:43:48,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-13 18:43:48,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:43:48,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-13 18:43:48,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:43:48,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-13 18:43:48,930 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-11-13 18:43:48,930 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 28 treesize of output 27 [2021-11-13 18:43:49,436 INFO L354 Elim1Store]: treesize reduction 129, result has 15.7 percent of original size [2021-11-13 18:43:49,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 63 treesize of output 57 [2021-11-13 18:43:49,579 INFO L354 Elim1Store]: treesize reduction 24, result has 52.9 percent of original size [2021-11-13 18:43:49,579 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 46 treesize of output 47 [2021-11-13 18:43:50,252 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 18:43:50,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:44:18,982 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_142| Int)) (or (forall ((|v_ULTIMATE.start_main_~i~0#1_141| Int)) (or (<= (+ 3 |v_ULTIMATE.start_main_~i~0#1_141|) c_~N~0) (<= c_~N~0 (+ |v_ULTIMATE.start_main_~i~0#1_141| 1)) (= (select (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_142| 4)))) (store .cse0 .cse1 (+ (select .cse0 .cse1) 4))) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_141| 4))) 1))) (< 0 |v_ULTIMATE.start_main_~i~0#1_142|))) is different from false [2021-11-13 18:44:37,436 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_142| Int) (|v_ULTIMATE.start_main_~i~0#1_141| Int)) (or (<= (+ 2 |v_ULTIMATE.start_main_~i~0#1_141|) |c_ULTIMATE.start_main_~i~0#1|) (= (select (let ((.cse0 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)) 1)) (.cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_142| 4)))) (store .cse0 .cse1 (+ (select .cse0 .cse1) 4))) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_141| 4))) 1) (< 0 |v_ULTIMATE.start_main_~i~0#1_142|) (<= |c_ULTIMATE.start_main_~i~0#1| |v_ULTIMATE.start_main_~i~0#1_141|))) is different from false [2021-11-13 18:44:39,504 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_142| Int) (|v_ULTIMATE.start_main_~i~0#1_141| Int)) (or (<= (+ |v_ULTIMATE.start_main_~i~0#1_141| 1) |c_ULTIMATE.start_main_~i~0#1|) (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_141|) (= (select (let ((.cse0 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4) 4) 1)) (.cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_142| 4)))) (store .cse0 .cse1 (+ (select .cse0 .cse1) 4))) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_141| 4))) 1) (< 0 |v_ULTIMATE.start_main_~i~0#1_142|))) is different from false [2021-11-13 18:44:39,519 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 72 treesize of output 68 [2021-11-13 18:44:39,546 INFO L354 Elim1Store]: treesize reduction 12, result has 25.0 percent of original size [2021-11-13 18:44:39,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 349 treesize of output 323 [2021-11-13 18:44:39,675 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 5 not checked. [2021-11-13 18:44:39,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56826701] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:44:39,675 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:44:39,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 16] total 34 [2021-11-13 18:44:39,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728189562] [2021-11-13 18:44:39,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:44:39,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-13 18:44:39,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:44:39,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-13 18:44:39,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=764, Unknown=14, NotChecked=180, Total=1122 [2021-11-13 18:44:39,678 INFO L87 Difference]: Start difference. First operand 74 states and 90 transitions. Second operand has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 34 states have internal predecessors, (61), 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) [2021-11-13 18:44:41,888 WARN L838 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4))) 1) (<= 1 |c_ULTIMATE.start_main_~i~0#1|) (forall ((|v_ULTIMATE.start_main_~i~0#1_142| Int) (|v_ULTIMATE.start_main_~i~0#1_141| Int)) (or (<= (+ |v_ULTIMATE.start_main_~i~0#1_141| 1) |c_ULTIMATE.start_main_~i~0#1|) (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_141|) (= (select (let ((.cse0 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4) 4) 1)) (.cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_142| 4)))) (store .cse0 .cse1 (+ (select .cse0 .cse1) 4))) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_141| 4))) 1) (< 0 |v_ULTIMATE.start_main_~i~0#1_142|)))) is different from false [2021-11-13 18:44:43,894 WARN L838 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (- 4) (* |c_ULTIMATE.start_main_~i~0#1| 4))) 1) (forall ((|v_ULTIMATE.start_main_~i~0#1_142| Int) (|v_ULTIMATE.start_main_~i~0#1_141| Int)) (or (<= (+ 2 |v_ULTIMATE.start_main_~i~0#1_141|) |c_ULTIMATE.start_main_~i~0#1|) (= (select (let ((.cse0 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)) 1)) (.cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_142| 4)))) (store .cse0 .cse1 (+ (select .cse0 .cse1) 4))) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_141| 4))) 1) (< 0 |v_ULTIMATE.start_main_~i~0#1_142|) (<= |c_ULTIMATE.start_main_~i~0#1| |v_ULTIMATE.start_main_~i~0#1_141|))) (<= 2 |c_ULTIMATE.start_main_~i~0#1|)) is different from false [2021-11-13 18:44:45,901 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse1 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (and (= (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse1)) 1) (forall ((|v_ULTIMATE.start_main_~i~0#1_142| Int) (|v_ULTIMATE.start_main_~i~0#1_141| Int)) (or (<= (+ |v_ULTIMATE.start_main_~i~0#1_141| 1) |c_ULTIMATE.start_main_~i~0#1|) (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_141|) (= (select (let ((.cse2 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4) 4) 1)) (.cse3 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_142| 4)))) (store .cse2 .cse3 (+ (select .cse2 .cse3) 4))) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_141| 4))) 1) (< 0 |v_ULTIMATE.start_main_~i~0#1_142|))) (= (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (- 4) .cse1)) 1) (< |c_ULTIMATE.start_main_~i~0#1| c_~N~0) (<= 2 |c_ULTIMATE.start_main_~i~0#1|))) is different from false [2021-11-13 18:44:47,908 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_main_~i~0#1_131| Int)) (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse1 (* |v_ULTIMATE.start_main_~i~0#1_131| 4))) (and (<= 2 |v_ULTIMATE.start_main_~i~0#1_131|) (< |v_ULTIMATE.start_main_~i~0#1_131| c_~N~0) (<= |c_ULTIMATE.start_main_~i~0#1| (+ |v_ULTIMATE.start_main_~i~0#1_131| 1)) (= (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse1)) 1) (= (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (- 4) .cse1)) 1)))) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (- 4) (* |c_ULTIMATE.start_main_~i~0#1| 4))) 1) (forall ((|v_ULTIMATE.start_main_~i~0#1_142| Int) (|v_ULTIMATE.start_main_~i~0#1_141| Int)) (or (<= (+ 2 |v_ULTIMATE.start_main_~i~0#1_141|) |c_ULTIMATE.start_main_~i~0#1|) (= (select (let ((.cse2 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)) 1)) (.cse3 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_142| 4)))) (store .cse2 .cse3 (+ (select .cse2 .cse3) 4))) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_141| 4))) 1) (< 0 |v_ULTIMATE.start_main_~i~0#1_142|) (<= |c_ULTIMATE.start_main_~i~0#1| |v_ULTIMATE.start_main_~i~0#1_141|))) (<= 2 |c_ULTIMATE.start_main_~i~0#1|)) is different from false [2021-11-13 18:44:49,913 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~i~0#1_142| Int)) (or (forall ((|v_ULTIMATE.start_main_~i~0#1_141| Int)) (or (<= (+ 3 |v_ULTIMATE.start_main_~i~0#1_141|) c_~N~0) (<= c_~N~0 (+ |v_ULTIMATE.start_main_~i~0#1_141| 1)) (= (select (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_142| 4)))) (store .cse0 .cse1 (+ (select .cse0 .cse1) 4))) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_141| 4))) 1))) (< 0 |v_ULTIMATE.start_main_~i~0#1_142|))) (exists ((|v_ULTIMATE.start_main_~i~0#1_131| Int)) (let ((.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse3 (* |v_ULTIMATE.start_main_~i~0#1_131| 4))) (and (<= 2 |v_ULTIMATE.start_main_~i~0#1_131|) (< |v_ULTIMATE.start_main_~i~0#1_131| c_~N~0) (<= c_~N~0 (+ |v_ULTIMATE.start_main_~i~0#1_131| 1)) (= (select .cse2 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse3)) 1) (= (select .cse2 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (- 4) .cse3)) 1))))) is different from false [2021-11-13 18:44:50,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:44:50,762 INFO L93 Difference]: Finished difference Result 95 states and 113 transitions. [2021-11-13 18:44:50,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-13 18:44:50,762 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 34 states have internal predecessors, (61), 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 [2021-11-13 18:44:50,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:44:50,763 INFO L225 Difference]: With dead ends: 95 [2021-11-13 18:44:50,763 INFO L226 Difference]: Without dead ends: 83 [2021-11-13 18:44:50,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 60.6s TimeCoverageRelationStatistics Valid=291, Invalid=1204, Unknown=19, NotChecked=648, Total=2162 [2021-11-13 18:44:50,765 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 22 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 364.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.82ms SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 388.48ms IncrementalHoareTripleChecker+Time [2021-11-13 18:44:50,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 58 Invalid, 331 Unknown, 0 Unchecked, 1.82ms Time], IncrementalHoareTripleChecker [20 Valid, 166 Invalid, 0 Unknown, 145 Unchecked, 388.48ms Time] [2021-11-13 18:44:50,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-13 18:44:50,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2021-11-13 18:44:50,786 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) [2021-11-13 18:44:50,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 95 transitions. [2021-11-13 18:44:50,787 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 95 transitions. Word has length 34 [2021-11-13 18:44:50,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:44:50,788 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 95 transitions. [2021-11-13 18:44:50,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 34 states have internal predecessors, (61), 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) [2021-11-13 18:44:50,788 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 95 transitions. [2021-11-13 18:44:50,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-13 18:44:50,790 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:44:50,790 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:44:50,826 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-11-13 18:44:51,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:44:51,015 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:44:51,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:44:51,015 INFO L85 PathProgramCache]: Analyzing trace with hash 880380819, now seen corresponding path program 7 times [2021-11-13 18:44:51,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:44:51,015 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872243672] [2021-11-13 18:44:51,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:44:51,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:44:51,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:51,282 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 18:44:51,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:44:51,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872243672] [2021-11-13 18:44:51,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872243672] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:44:51,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845347430] [2021-11-13 18:44:51,283 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 18:44:51,283 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:44:51,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:44:51,285 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:44:51,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-13 18:44:51,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:51,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-13 18:44:51,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:44:51,743 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 18:44:51,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:44:51,949 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 18:44:51,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845347430] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:44:51,949 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:44:51,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-11-13 18:44:51,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839333664] [2021-11-13 18:44:51,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:44:51,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-13 18:44:51,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:44:51,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-13 18:44:51,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-11-13 18:44:51,952 INFO L87 Difference]: Start difference. First operand 79 states and 95 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 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) [2021-11-13 18:44:52,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:44:52,519 INFO L93 Difference]: Finished difference Result 133 states and 154 transitions. [2021-11-13 18:44:52,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-13 18:44:52,520 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 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 36 [2021-11-13 18:44:52,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:44:52,521 INFO L225 Difference]: With dead ends: 133 [2021-11-13 18:44:52,522 INFO L226 Difference]: Without dead ends: 81 [2021-11-13 18:44:52,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-11-13 18:44:52,523 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 392.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.45ms SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 425.01ms IncrementalHoareTripleChecker+Time [2021-11-13 18:44:52,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 43 Invalid, 232 Unknown, 0 Unchecked, 2.45ms Time], IncrementalHoareTripleChecker [62 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 425.01ms Time] [2021-11-13 18:44:52,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-13 18:44:52,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 63. [2021-11-13 18:44:52,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1451612903225807) internal successors, (71), 62 states have internal predecessors, (71), 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) [2021-11-13 18:44:52,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 71 transitions. [2021-11-13 18:44:52,539 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 71 transitions. Word has length 36 [2021-11-13 18:44:52,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:44:52,539 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 71 transitions. [2021-11-13 18:44:52,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 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) [2021-11-13 18:44:52,540 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 71 transitions. [2021-11-13 18:44:52,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-13 18:44:52,541 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:44:52,541 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:44:52,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-13 18:44:52,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-13 18:44:52,755 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:44:52,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:44:52,755 INFO L85 PathProgramCache]: Analyzing trace with hash 975408915, now seen corresponding path program 8 times [2021-11-13 18:44:52,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:44:52,755 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152701245] [2021-11-13 18:44:52,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:44:52,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:44:52,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:53,049 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-13 18:44:53,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:44:53,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152701245] [2021-11-13 18:44:53,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152701245] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:44:53,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230993965] [2021-11-13 18:44:53,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:44:53,050 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:44:53,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:44:53,052 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:44:53,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-13 18:44:53,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:44:53,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:44:53,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-13 18:44:53,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:44:53,604 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-13 18:44:53,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:44:53,857 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-13 18:44:53,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230993965] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:44:53,857 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:44:53,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-11-13 18:44:53,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401032859] [2021-11-13 18:44:53,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:44:53,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-13 18:44:53,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:44:53,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-13 18:44:53,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-11-13 18:44:53,858 INFO L87 Difference]: Start difference. First operand 63 states and 71 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 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) [2021-11-13 18:44:54,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:44:54,616 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2021-11-13 18:44:54,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-13 18:44:54,617 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 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 39 [2021-11-13 18:44:54,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:44:54,618 INFO L225 Difference]: With dead ends: 72 [2021-11-13 18:44:54,619 INFO L226 Difference]: Without dead ends: 60 [2021-11-13 18:44:54,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2021-11-13 18:44:54,620 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 81 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 461.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.33ms SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 504.19ms IncrementalHoareTripleChecker+Time [2021-11-13 18:44:54,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 30 Invalid, 254 Unknown, 0 Unchecked, 2.33ms Time], IncrementalHoareTripleChecker [41 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 504.19ms Time] [2021-11-13 18:44:54,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-13 18:44:54,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 42. [2021-11-13 18:44:54,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 41 states have internal predecessors, (46), 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) [2021-11-13 18:44:54,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2021-11-13 18:44:54,631 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 39 [2021-11-13 18:44:54,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:44:54,632 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2021-11-13 18:44:54,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 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) [2021-11-13 18:44:54,632 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2021-11-13 18:44:54,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-13 18:44:54,634 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:44:54,634 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:44:54,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-13 18:44:54,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-13 18:44:54,859 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:44:54,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:44:54,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1118330549, now seen corresponding path program 9 times [2021-11-13 18:44:54,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:44:54,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635798281] [2021-11-13 18:44:54,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:44:54,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:44:54,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:59,939 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:44:59,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:44:59,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635798281] [2021-11-13 18:44:59,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635798281] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:44:59,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383751420] [2021-11-13 18:44:59,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:44:59,941 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:44:59,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:44:59,942 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:44:59,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-13 18:45:00,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-13 18:45:00,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:45:00,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-13 18:45:00,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:45:00,068 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 11 treesize of output 7 [2021-11-13 18:45:00,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:45:00,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-13 18:45:00,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:45:00,664 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-11-13 18:45:00,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 47 [2021-11-13 18:45:01,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:45:01,115 INFO L354 Elim1Store]: treesize reduction 88, result has 20.7 percent of original size [2021-11-13 18:45:01,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 61 [2021-11-13 18:45:01,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:45:01,550 INFO L354 Elim1Store]: treesize reduction 88, result has 20.7 percent of original size [2021-11-13 18:45:01,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 61 [2021-11-13 18:45:01,979 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [|ULTIMATE.start_main_~i~0#1|] [2021-11-13 18:45:01,980 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:45:01,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2021-11-13 18:45:01,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801317668] [2021-11-13 18:45:01,980 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 18:45:01,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-13 18:45:01,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:45:01,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-13 18:45:01,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1154, Unknown=0, NotChecked=0, Total=1260 [2021-11-13 18:45:01,982 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 32 states, 32 states have (on average 1.28125) internal successors, (41), 32 states have internal predecessors, (41), 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) [2021-11-13 18:45:11,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:45:11,556 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2021-11-13 18:45:11,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-13 18:45:11,567 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.28125) internal successors, (41), 32 states have internal predecessors, (41), 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 41 [2021-11-13 18:45:11,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:45:11,568 INFO L225 Difference]: With dead ends: 64 [2021-11-13 18:45:11,568 INFO L226 Difference]: Without dead ends: 60 [2021-11-13 18:45:11,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1111 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=494, Invalid=3928, Unknown=0, NotChecked=0, Total=4422 [2021-11-13 18:45:11,571 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 33 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1838.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.98ms SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1992.11ms IncrementalHoareTripleChecker+Time [2021-11-13 18:45:11,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 87 Invalid, 823 Unknown, 0 Unchecked, 13.98ms Time], IncrementalHoareTripleChecker [117 Valid, 706 Invalid, 0 Unknown, 0 Unchecked, 1992.11ms Time] [2021-11-13 18:45:11,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-13 18:45:11,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 53. [2021-11-13 18:45:11,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.1346153846153846) internal successors, (59), 52 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) [2021-11-13 18:45:11,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2021-11-13 18:45:11,587 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 41 [2021-11-13 18:45:11,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:45:11,588 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2021-11-13 18:45:11,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.28125) internal successors, (41), 32 states have internal predecessors, (41), 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) [2021-11-13 18:45:11,588 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2021-11-13 18:45:11,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-13 18:45:11,589 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:45:11,589 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:45:11,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-13 18:45:11,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-13 18:45:11,803 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:45:11,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:45:11,803 INFO L85 PathProgramCache]: Analyzing trace with hash 97262195, now seen corresponding path program 4 times [2021-11-13 18:45:11,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:45:11,803 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000675096] [2021-11-13 18:45:11,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:45:11,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:45:11,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:12,653 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 32 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-13 18:45:12,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:45:12,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000675096] [2021-11-13 18:45:12,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000675096] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:45:12,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947310137] [2021-11-13 18:45:12,654 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:45:12,654 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:45:12,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:45:12,659 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:45:12,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-13 18:45:12,703 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:45:12,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:45:12,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-13 18:45:12,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:45:13,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-13 18:45:13,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:45:13,209 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 18:45:13,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 26 [2021-11-13 18:45:13,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:45:13,353 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 18:45:13,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 26 [2021-11-13 18:45:13,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:45:13,488 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 18:45:13,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 26 [2021-11-13 18:45:13,618 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 15 treesize of output 7 [2021-11-13 18:45:13,762 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-13 18:45:13,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:45:14,429 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 16 treesize of output 14 [2021-11-13 18:45:14,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-13 18:45:14,691 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-13 18:45:14,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947310137] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:45:14,692 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:45:14,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 33 [2021-11-13 18:45:14,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707263667] [2021-11-13 18:45:14,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:45:14,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-13 18:45:14,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:45:14,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-13 18:45:14,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=917, Unknown=0, NotChecked=0, Total=1056 [2021-11-13 18:45:14,694 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 33 states have internal predecessors, (78), 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) [2021-11-13 18:45:17,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:45:17,075 INFO L93 Difference]: Finished difference Result 81 states and 90 transitions. [2021-11-13 18:45:17,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-13 18:45:17,075 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 33 states have internal predecessors, (78), 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 41 [2021-11-13 18:45:17,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:45:17,076 INFO L225 Difference]: With dead ends: 81 [2021-11-13 18:45:17,076 INFO L226 Difference]: Without dead ends: 64 [2021-11-13 18:45:17,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 60 SyntacticMatches, 7 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 755 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=323, Invalid=2029, Unknown=0, NotChecked=0, Total=2352 [2021-11-13 18:45:17,078 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 51 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1245.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.79ms SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1329.41ms IncrementalHoareTripleChecker+Time [2021-11-13 18:45:17,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 92 Invalid, 675 Unknown, 0 Unchecked, 4.79ms Time], IncrementalHoareTripleChecker [88 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 1329.41ms Time] [2021-11-13 18:45:17,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-13 18:45:17,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 54. [2021-11-13 18:45:17,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 53 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) [2021-11-13 18:45:17,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2021-11-13 18:45:17,091 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 41 [2021-11-13 18:45:17,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:45:17,092 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2021-11-13 18:45:17,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 33 states have internal predecessors, (78), 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) [2021-11-13 18:45:17,092 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2021-11-13 18:45:17,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-13 18:45:17,093 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:45:17,093 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:45:17,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-13 18:45:17,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:45:17,296 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:45:17,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:45:17,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1337185267, now seen corresponding path program 5 times [2021-11-13 18:45:17,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:45:17,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289126979] [2021-11-13 18:45:17,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:45:17,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:45:17,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:18,149 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 35 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-13 18:45:18,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:45:18,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289126979] [2021-11-13 18:45:18,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289126979] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:45:18,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925623794] [2021-11-13 18:45:18,150 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:45:18,151 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:45:18,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:45:18,151 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:45:18,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-13 18:45:18,323 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-13 18:45:18,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:45:18,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-13 18:45:18,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:45:18,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-13 18:45:18,566 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-13 18:45:18,567 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 25 treesize of output 24 [2021-11-13 18:45:18,815 INFO L354 Elim1Store]: treesize reduction 80, result has 20.8 percent of original size [2021-11-13 18:45:18,815 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 44 treesize of output 46 [2021-11-13 18:45:23,141 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [|ULTIMATE.start_main_~i~0#1|] [2021-11-13 18:45:23,142 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:45:23,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-11-13 18:45:23,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798500960] [2021-11-13 18:45:23,142 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 18:45:23,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-13 18:45:23,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:45:23,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-13 18:45:23,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=342, Unknown=2, NotChecked=0, Total=420 [2021-11-13 18:45:23,144 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 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) [2021-11-13 18:45:24,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:45:24,661 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2021-11-13 18:45:24,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-13 18:45:24,662 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 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 41 [2021-11-13 18:45:24,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:45:24,663 INFO L225 Difference]: With dead ends: 72 [2021-11-13 18:45:24,663 INFO L226 Difference]: Without dead ends: 58 [2021-11-13 18:45:24,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=193, Invalid=927, Unknown=2, NotChecked=0, Total=1122 [2021-11-13 18:45:24,664 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 30 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 532.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.29ms SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 579.11ms IncrementalHoareTripleChecker+Time [2021-11-13 18:45:24,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 39 Invalid, 246 Unknown, 0 Unchecked, 2.29ms Time], IncrementalHoareTripleChecker [32 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 579.11ms Time] [2021-11-13 18:45:24,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-13 18:45:24,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2021-11-13 18:45:24,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 55 states have internal predecessors, (61), 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) [2021-11-13 18:45:24,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2021-11-13 18:45:24,680 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 41 [2021-11-13 18:45:24,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:45:24,681 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2021-11-13 18:45:24,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 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) [2021-11-13 18:45:24,681 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2021-11-13 18:45:24,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-13 18:45:24,682 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:45:24,682 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:45:24,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-13 18:45:24,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-13 18:45:24,895 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:45:24,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:45:24,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1027067351, now seen corresponding path program 10 times [2021-11-13 18:45:24,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:45:24,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468868803] [2021-11-13 18:45:24,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:45:24,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:45:24,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:25,239 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-13 18:45:25,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:45:25,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468868803] [2021-11-13 18:45:25,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468868803] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:45:25,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888883770] [2021-11-13 18:45:25,240 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:45:25,240 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:45:25,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:45:25,241 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:45:25,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-13 18:45:25,283 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:45:25,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:45:25,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-13 18:45:25,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:45:25,816 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-13 18:45:25,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:45:26,061 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-13 18:45:26,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888883770] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:45:26,061 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:45:26,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2021-11-13 18:45:26,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162029271] [2021-11-13 18:45:26,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:45:26,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-13 18:45:26,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:45:26,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-13 18:45:26,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-11-13 18:45:26,063 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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) [2021-11-13 18:45:26,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:45:26,715 INFO L93 Difference]: Finished difference Result 115 states and 126 transitions. [2021-11-13 18:45:26,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-13 18:45:26,715 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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) Word has length 43 [2021-11-13 18:45:26,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:45:26,716 INFO L225 Difference]: With dead ends: 115 [2021-11-13 18:45:26,716 INFO L226 Difference]: Without dead ends: 65 [2021-11-13 18:45:26,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2021-11-13 18:45:26,717 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 115 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 435.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.27ms SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 476.06ms IncrementalHoareTripleChecker+Time [2021-11-13 18:45:26,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 36 Invalid, 274 Unknown, 0 Unchecked, 2.27ms Time], IncrementalHoareTripleChecker [76 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 476.06ms Time] [2021-11-13 18:45:26,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-13 18:45:26,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 47. [2021-11-13 18:45:26,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.108695652173913) internal successors, (51), 46 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) [2021-11-13 18:45:26,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2021-11-13 18:45:26,727 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 43 [2021-11-13 18:45:26,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:45:26,727 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2021-11-13 18:45:26,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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) [2021-11-13 18:45:26,728 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2021-11-13 18:45:26,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-13 18:45:26,728 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:45:26,728 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:45:26,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-13 18:45:26,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-13 18:45:26,929 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:45:26,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:45:26,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1824213007, now seen corresponding path program 11 times [2021-11-13 18:45:26,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:45:26,930 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001371015] [2021-11-13 18:45:26,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:45:26,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:45:26,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:27,315 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-13 18:45:27,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:45:27,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001371015] [2021-11-13 18:45:27,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001371015] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:45:27,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330574332] [2021-11-13 18:45:27,316 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:45:27,316 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:45:27,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:45:27,317 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:45:27,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-13 18:45:27,689 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-13 18:45:27,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:45:27,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-13 18:45:27,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:45:28,246 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-13 18:45:28,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:45:28,560 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-13 18:45:28,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330574332] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:45:28,561 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:45:28,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2021-11-13 18:45:28,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152835103] [2021-11-13 18:45:28,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:45:28,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-13 18:45:28,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:45:28,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-13 18:45:28,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-11-13 18:45:28,564 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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) [2021-11-13 18:45:29,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:45:29,507 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2021-11-13 18:45:29,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-13 18:45:29,508 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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) Word has length 46 [2021-11-13 18:45:29,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:45:29,508 INFO L225 Difference]: With dead ends: 56 [2021-11-13 18:45:29,509 INFO L226 Difference]: Without dead ends: 52 [2021-11-13 18:45:29,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=206, Invalid=664, Unknown=0, NotChecked=0, Total=870 [2021-11-13 18:45:29,510 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 145 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 542.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.71ms SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 581.08ms IncrementalHoareTripleChecker+Time [2021-11-13 18:45:29,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 21 Invalid, 310 Unknown, 0 Unchecked, 2.71ms Time], IncrementalHoareTripleChecker [72 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 581.08ms Time] [2021-11-13 18:45:29,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-13 18:45:29,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2021-11-13 18:45:29,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 48 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) [2021-11-13 18:45:29,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2021-11-13 18:45:29,524 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 46 [2021-11-13 18:45:29,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:45:29,524 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2021-11-13 18:45:29,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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) [2021-11-13 18:45:29,525 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2021-11-13 18:45:29,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-13 18:45:29,525 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:45:29,526 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:45:29,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-13 18:45:29,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:45:29,739 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:45:29,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:45:29,739 INFO L85 PathProgramCache]: Analyzing trace with hash 775276721, now seen corresponding path program 12 times [2021-11-13 18:45:29,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:45:29,739 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647165401] [2021-11-13 18:45:29,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:45:29,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:45:29,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:36,479 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:45:36,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:45:36,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647165401] [2021-11-13 18:45:36,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647165401] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:45:36,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398105109] [2021-11-13 18:45:36,480 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:45:36,480 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:45:36,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:45:36,484 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:45:36,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-13 18:45:36,632 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-13 18:45:36,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:45:36,634 WARN L261 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 80 conjunts are in the unsatisfiable core [2021-11-13 18:45:36,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:45:36,663 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 11 treesize of output 7 [2021-11-13 18:45:36,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:45:36,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-13 18:45:37,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:45:37,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:45:37,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 37 [2021-11-13 18:45:37,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:45:37,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:45:37,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:45:37,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:45:37,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 44 [2021-11-13 18:45:38,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:45:38,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:45:38,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:45:38,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:45:38,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:45:38,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:45:38,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:45:38,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 54 [2021-11-13 18:45:38,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:45:38,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:45:38,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:45:38,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:45:38,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:45:38,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:45:38,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:45:38,996 INFO L354 Elim1Store]: treesize reduction 114, result has 23.5 percent of original size [2021-11-13 18:45:38,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 57 treesize of output 68 [2021-11-13 18:45:43,462 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [|ULTIMATE.start_main_~i~0#1|] [2021-11-13 18:45:43,462 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:45:43,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2021-11-13 18:45:43,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802566146] [2021-11-13 18:45:43,462 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 18:45:43,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-13 18:45:43,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:45:43,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-13 18:45:43,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1970, Unknown=1, NotChecked=0, Total=2162 [2021-11-13 18:45:43,464 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand has 38 states, 38 states have (on average 1.263157894736842) internal successors, (48), 38 states have internal predecessors, (48), 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) [2021-11-13 18:45:57,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:45:57,239 INFO L93 Difference]: Finished difference Result 108 states and 121 transitions. [2021-11-13 18:45:57,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-13 18:45:57,240 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.263157894736842) internal successors, (48), 38 states have internal predecessors, (48), 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 48 [2021-11-13 18:45:57,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:45:57,240 INFO L225 Difference]: With dead ends: 108 [2021-11-13 18:45:57,241 INFO L226 Difference]: Without dead ends: 104 [2021-11-13 18:45:57,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2032 ImplicationChecksByTransitivity, 20.2s TimeCoverageRelationStatistics Valid=743, Invalid=6912, Unknown=1, NotChecked=0, Total=7656 [2021-11-13 18:45:57,245 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 66 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 1253 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3473.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 1440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.71ms SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 1253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3771.22ms IncrementalHoareTripleChecker+Time [2021-11-13 18:45:57,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 95 Invalid, 1440 Unknown, 0 Unchecked, 8.71ms Time], IncrementalHoareTripleChecker [187 Valid, 1253 Invalid, 0 Unknown, 0 Unchecked, 3771.22ms Time] [2021-11-13 18:45:57,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-13 18:45:57,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 71. [2021-11-13 18:45:57,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.1285714285714286) internal successors, (79), 70 states have internal predecessors, (79), 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) [2021-11-13 18:45:57,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2021-11-13 18:45:57,266 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 48 [2021-11-13 18:45:57,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:45:57,266 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2021-11-13 18:45:57,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.263157894736842) internal successors, (48), 38 states have internal predecessors, (48), 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) [2021-11-13 18:45:57,267 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2021-11-13 18:45:57,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-13 18:45:57,267 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:45:57,268 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:45:57,305 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-11-13 18:45:57,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:45:57,487 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:45:57,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:45:57,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1218867985, now seen corresponding path program 6 times [2021-11-13 18:45:57,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:45:57,488 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694389151] [2021-11-13 18:45:57,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:45:57,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:45:57,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:58,309 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 9 proven. 51 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-13 18:45:58,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:45:58,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694389151] [2021-11-13 18:45:58,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694389151] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:45:58,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785053986] [2021-11-13 18:45:58,310 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:45:58,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:45:58,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:45:58,311 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:45:58,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-13 18:45:58,443 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-13 18:45:58,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:45:58,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-13 18:45:58,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:45:58,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-13 18:46:01,132 INFO L354 Elim1Store]: treesize reduction 34, result has 48.5 percent of original size [2021-11-13 18:46:01,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 56 [2021-11-13 18:46:01,765 INFO L354 Elim1Store]: treesize reduction 34, result has 48.5 percent of original size [2021-11-13 18:46:01,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 63 treesize of output 66 [2021-11-13 18:46:02,528 INFO L354 Elim1Store]: treesize reduction 34, result has 48.5 percent of original size [2021-11-13 18:46:02,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 56 [2021-11-13 18:46:08,370 INFO L354 Elim1Store]: treesize reduction 104, result has 29.3 percent of original size [2021-11-13 18:46:08,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 81 treesize of output 95 [2021-11-13 18:46:14,807 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 18:46:14,808 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 49 treesize of output 41 [2021-11-13 18:46:15,216 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 17 proven. 23 refuted. 1 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-13 18:46:15,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:46:17,736 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_278| Int)) (or (= (select (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)))) (store .cse0 .cse1 (+ (select .cse0 .cse1) 4))) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_278| 4))) 1) (< |v_ULTIMATE.start_main_~i~0#1_278| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (<= c_~N~0 |v_ULTIMATE.start_main_~i~0#1_278|) (< (+ |v_ULTIMATE.start_main_~i~0#1_278| 1) c_~N~0))) is different from false [2021-11-13 18:46:21,584 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_279| Int) (|ULTIMATE.start_main_~i~0#1| Int) (|v_ULTIMATE.start_main_~i~0#1_278| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_278| (+ |v_ULTIMATE.start_main_~i~0#1_279| 1)) (<= c_~N~0 |v_ULTIMATE.start_main_~i~0#1_278|) (< |v_ULTIMATE.start_main_~i~0#1_279| (+ 3 |ULTIMATE.start_main_~i~0#1|)) (< (+ |v_ULTIMATE.start_main_~i~0#1_278| 1) c_~N~0) (= (select (let ((.cse0 (let ((.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse3 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (store .cse2 .cse3 (+ (select .cse2 .cse3) 4)))) (.cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_279| 4)))) (store .cse0 .cse1 (+ 4 (select .cse0 .cse1)))) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_278| 4))) 1))) is different from false [2021-11-13 18:46:21,814 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [|ULTIMATE.start_main_~i~0#1|] [2021-11-13 18:46:21,815 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:46:21,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-11-13 18:46:21,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531771465] [2021-11-13 18:46:21,815 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 18:46:21,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-13 18:46:21,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:46:21,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-13 18:46:21,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=981, Unknown=7, NotChecked=130, Total=1260 [2021-11-13 18:46:21,816 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 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) [2021-11-13 18:46:23,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:46:23,843 INFO L93 Difference]: Finished difference Result 102 states and 113 transitions. [2021-11-13 18:46:23,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-13 18:46:23,844 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 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) Word has length 48 [2021-11-13 18:46:23,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:46:23,844 INFO L225 Difference]: With dead ends: 102 [2021-11-13 18:46:23,845 INFO L226 Difference]: Without dead ends: 83 [2021-11-13 18:46:23,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 57 SyntacticMatches, 7 SemanticMatches, 43 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=193, Invalid=1614, Unknown=7, NotChecked=166, Total=1980 [2021-11-13 18:46:23,846 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 16 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1044.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.99ms SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1114.45ms IncrementalHoareTripleChecker+Time [2021-11-13 18:46:23,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 82 Invalid, 529 Unknown, 0 Unchecked, 2.99ms Time], IncrementalHoareTripleChecker [34 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 1114.45ms Time] [2021-11-13 18:46:23,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-13 18:46:23,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 72. [2021-11-13 18:46:23,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.1126760563380282) internal successors, (79), 71 states have internal predecessors, (79), 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) [2021-11-13 18:46:23,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 79 transitions. [2021-11-13 18:46:23,861 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 79 transitions. Word has length 48 [2021-11-13 18:46:23,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:46:23,862 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 79 transitions. [2021-11-13 18:46:23,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 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) [2021-11-13 18:46:23,862 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 79 transitions. [2021-11-13 18:46:23,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-13 18:46:23,862 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:23,863 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:23,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-13 18:46:24,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:46:24,063 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:46:24,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:24,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1596462541, now seen corresponding path program 7 times [2021-11-13 18:46:24,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:46:24,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357664230] [2021-11-13 18:46:24,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:46:24,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:46:24,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:25,058 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 7 proven. 53 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-13 18:46:25,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:46:25,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357664230] [2021-11-13 18:46:25,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357664230] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:46:25,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694078453] [2021-11-13 18:46:25,059 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 18:46:25,059 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:46:25,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:46:25,063 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:46:25,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-13 18:46:25,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:25,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-13 18:46:25,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:46:25,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-13 18:46:25,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:46:25,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-11-13 18:46:25,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:46:25,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:46:25,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:46:25,710 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 18:46:25,710 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 37 treesize of output 39 [2021-11-13 18:46:25,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:46:25,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:46:25,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:46:26,059 INFO L354 Elim1Store]: treesize reduction 90, result has 23.7 percent of original size [2021-11-13 18:46:26,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 51 [2021-11-13 18:46:32,267 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [|ULTIMATE.start_main_~i~0#1|] [2021-11-13 18:46:32,267 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:46:32,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-11-13 18:46:32,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719975626] [2021-11-13 18:46:32,268 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 18:46:32,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-13 18:46:32,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:46:32,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-13 18:46:32,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=544, Unknown=2, NotChecked=0, Total=650 [2021-11-13 18:46:32,269 INFO L87 Difference]: Start difference. First operand 72 states and 79 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 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) [2021-11-13 18:46:33,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:46:33,997 INFO L93 Difference]: Finished difference Result 101 states and 109 transitions. [2021-11-13 18:46:33,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-13 18:46:33,998 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 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) Word has length 48 [2021-11-13 18:46:33,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:46:33,999 INFO L225 Difference]: With dead ends: 101 [2021-11-13 18:46:33,999 INFO L226 Difference]: Without dead ends: 85 [2021-11-13 18:46:34,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=253, Invalid=1385, Unknown=2, NotChecked=0, Total=1640 [2021-11-13 18:46:34,001 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 37 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 563.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.89ms SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 600.34ms IncrementalHoareTripleChecker+Time [2021-11-13 18:46:34,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 38 Invalid, 274 Unknown, 0 Unchecked, 1.89ms Time], IncrementalHoareTripleChecker [41 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 600.34ms Time] [2021-11-13 18:46:34,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-11-13 18:46:34,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2021-11-13 18:46:34,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.0975609756097562) internal successors, (90), 82 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) [2021-11-13 18:46:34,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 90 transitions. [2021-11-13 18:46:34,026 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 90 transitions. Word has length 48 [2021-11-13 18:46:34,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:46:34,026 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 90 transitions. [2021-11-13 18:46:34,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 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) [2021-11-13 18:46:34,027 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 90 transitions. [2021-11-13 18:46:34,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-13 18:46:34,027 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:34,027 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:34,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-13 18:46:34,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-13 18:46:34,228 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:46:34,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:34,228 INFO L85 PathProgramCache]: Analyzing trace with hash 2064820435, now seen corresponding path program 13 times [2021-11-13 18:46:34,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:46:34,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926235406] [2021-11-13 18:46:34,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:46:34,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:46:34,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:34,653 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-13 18:46:34,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:46:34,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926235406] [2021-11-13 18:46:34,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926235406] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:46:34,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893842596] [2021-11-13 18:46:34,654 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 18:46:34,654 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:46:34,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:46:34,656 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:46:34,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-13 18:46:34,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:34,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-13 18:46:34,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:46:35,386 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-13 18:46:35,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:46:35,687 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-13 18:46:35,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893842596] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:46:35,687 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:46:35,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2021-11-13 18:46:35,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54879008] [2021-11-13 18:46:35,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:46:35,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-13 18:46:35,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:46:35,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-13 18:46:35,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2021-11-13 18:46:35,689 INFO L87 Difference]: Start difference. First operand 83 states and 90 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 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) [2021-11-13 18:46:36,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:46:36,775 INFO L93 Difference]: Finished difference Result 150 states and 161 transitions. [2021-11-13 18:46:36,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-13 18:46:36,775 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 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 50 [2021-11-13 18:46:36,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:46:36,776 INFO L225 Difference]: With dead ends: 150 [2021-11-13 18:46:36,776 INFO L226 Difference]: Without dead ends: 91 [2021-11-13 18:46:36,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2021-11-13 18:46:36,778 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 159 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 729.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.36ms SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 794.51ms IncrementalHoareTripleChecker+Time [2021-11-13 18:46:36,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 36 Invalid, 386 Unknown, 0 Unchecked, 3.36ms Time], IncrementalHoareTripleChecker [96 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 794.51ms Time] [2021-11-13 18:46:36,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-13 18:46:36,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 77. [2021-11-13 18:46:36,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0789473684210527) internal successors, (82), 76 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) [2021-11-13 18:46:36,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 82 transitions. [2021-11-13 18:46:36,797 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 82 transitions. Word has length 50 [2021-11-13 18:46:36,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:46:36,797 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 82 transitions. [2021-11-13 18:46:36,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 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) [2021-11-13 18:46:36,798 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 82 transitions. [2021-11-13 18:46:36,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-13 18:46:36,798 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:36,798 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:36,825 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-11-13 18:46:37,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-13 18:46:37,003 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:46:37,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:37,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1449329199, now seen corresponding path program 14 times [2021-11-13 18:46:37,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:46:37,004 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505279562] [2021-11-13 18:46:37,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:46:37,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:46:37,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:37,486 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 16 proven. 55 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-13 18:46:37,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:46:37,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505279562] [2021-11-13 18:46:37,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505279562] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:46:37,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316141480] [2021-11-13 18:46:37,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:46:37,487 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:46:37,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:46:37,488 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:46:37,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-13 18:46:37,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:46:37,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:46:37,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-13 18:46:37,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:46:38,239 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 25 proven. 46 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-13 18:46:38,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:46:38,548 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 25 proven. 46 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-13 18:46:38,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316141480] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:46:38,548 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:46:38,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2021-11-13 18:46:38,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000791425] [2021-11-13 18:46:38,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:46:38,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-13 18:46:38,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:46:38,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-13 18:46:38,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2021-11-13 18:46:38,550 INFO L87 Difference]: Start difference. First operand 77 states and 82 transitions. Second operand has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 23 states have internal predecessors, (66), 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) [2021-11-13 18:46:39,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:46:39,587 INFO L93 Difference]: Finished difference Result 86 states and 92 transitions. [2021-11-13 18:46:39,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-13 18:46:39,588 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 23 states have internal predecessors, (66), 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 50 [2021-11-13 18:46:39,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:46:39,588 INFO L225 Difference]: With dead ends: 86 [2021-11-13 18:46:39,588 INFO L226 Difference]: Without dead ends: 70 [2021-11-13 18:46:39,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=274, Invalid=916, Unknown=0, NotChecked=0, Total=1190 [2021-11-13 18:46:39,589 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 132 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 573.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.07ms SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 623.04ms IncrementalHoareTripleChecker+Time [2021-11-13 18:46:39,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 30 Invalid, 348 Unknown, 0 Unchecked, 2.07ms Time], IncrementalHoareTripleChecker [72 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 623.04ms Time] [2021-11-13 18:46:39,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-13 18:46:39,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 56. [2021-11-13 18:46:39,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 55 states have internal predecessors, (60), 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) [2021-11-13 18:46:39,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2021-11-13 18:46:39,601 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 50 [2021-11-13 18:46:39,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:46:39,601 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2021-11-13 18:46:39,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 23 states have internal predecessors, (66), 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) [2021-11-13 18:46:39,601 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2021-11-13 18:46:39,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-13 18:46:39,602 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:39,602 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:39,627 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-11-13 18:46:39,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-13 18:46:39,809 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:46:39,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:39,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1899679235, now seen corresponding path program 15 times [2021-11-13 18:46:39,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:46:39,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75007524] [2021-11-13 18:46:39,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:46:39,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:46:39,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:48,511 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:46:48,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:46:48,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75007524] [2021-11-13 18:46:48,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75007524] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:46:48,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936997585] [2021-11-13 18:46:48,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:46:48,512 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:46:48,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:46:48,513 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:46:48,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa262f98-f629-4957-b60d-b7ec5332ddc8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-13 18:46:48,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-13 18:46:48,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:46:48,714 WARN L261 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 90 conjunts are in the unsatisfiable core [2021-11-13 18:46:48,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:46:48,745 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 11 treesize of output 7 [2021-11-13 18:46:48,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:46:48,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-13 18:46:49,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:46:49,530 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-11-13 18:46:49,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2021-11-13 18:46:50,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:46:50,294 INFO L354 Elim1Store]: treesize reduction 88, result has 20.7 percent of original size [2021-11-13 18:46:50,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 69 [2021-11-13 18:46:54,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:46:54,977 INFO L354 Elim1Store]: treesize reduction 156, result has 17.9 percent of original size [2021-11-13 18:46:54,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 72 treesize of output 80 [2021-11-13 18:46:58,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:46:58,598 INFO L354 Elim1Store]: treesize reduction 156, result has 17.9 percent of original size [2021-11-13 18:46:58,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 72 treesize of output 80 [2021-11-13 18:47:01,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:01,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:01,646 INFO L354 Elim1Store]: treesize reduction 207, result has 14.1 percent of original size [2021-11-13 18:47:01,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 84 treesize of output 95 [2021-11-13 18:47:14,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:14,584 INFO L354 Elim1Store]: treesize reduction 430, result has 13.1 percent of original size [2021-11-13 18:47:14,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 20 case distinctions, treesize of input 124 treesize of output 130 [2021-11-13 18:47:37,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:37,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:38,038 INFO L354 Elim1Store]: treesize reduction 473, result has 14.9 percent of original size [2021-11-13 18:47:38,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 2 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 25 case distinctions, treesize of input 137 treesize of output 164 [2021-11-13 18:47:42,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:42,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:42,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:42,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:42,317 INFO L354 Elim1Store]: treesize reduction 528, result has 15.8 percent of original size [2021-11-13 18:47:42,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 4 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 30 case distinctions, treesize of input 163 treesize of output 209 [2021-11-13 18:47:46,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:46,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:46,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:46,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:46,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:46,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:46,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:46,400 INFO L354 Elim1Store]: treesize reduction 200, result has 17.4 percent of original size [2021-11-13 18:47:46,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 11 case distinctions, treesize of input 126 treesize of output 142 [2021-11-13 18:47:48,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:48,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:48,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:48,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:48,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:48,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:48,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:48,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:48,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:48,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:48,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:48,732 INFO L354 Elim1Store]: treesize reduction 223, result has 15.8 percent of original size [2021-11-13 18:47:48,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 11 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 13 case distinctions, treesize of input 136 treesize of output 155 [2021-11-13 18:47:51,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:51,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:51,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:51,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:51,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:51,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:51,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:51,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:51,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:51,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:51,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:51,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:51,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:51,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:51,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:51,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:51,250 INFO L354 Elim1Store]: treesize reduction 258, result has 14.0 percent of original size [2021-11-13 18:47:51,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 16 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 129 treesize of output 151 [2021-11-13 18:47:53,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:53,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:47:53,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:53,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:53,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:53,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:53,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:53,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:53,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:53,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:53,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:53,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:53,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:53,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:53,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:53,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:53,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:53,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 16 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 87 [2021-11-13 18:47:54,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:54,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:54,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:54,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:54,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:54,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:54,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:54,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:47:54,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:54,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:54,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:54,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:54,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:54,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:54,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:54,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:54,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:54,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:54,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 16 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 85 [2021-11-13 18:47:55,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:55,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:55,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:55,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:55,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:55,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:55,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:55,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:55,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:55,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:55,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:55,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:55,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:55,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:55,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:55,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:55,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 83 [2021-11-13 18:47:56,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:56,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:56,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:56,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:56,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:56,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:56,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:56,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:56,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:56,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:56,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:56,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:56,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:56,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:56,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:56,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:56,255 INFO L354 Elim1Store]: treesize reduction 82, result has 1.2 percent of original size [2021-11-13 18:47:56,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 16 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 6 case distinctions, treesize of input 85 treesize of output 94 [2021-11-13 18:47:57,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:57,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:57,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:57,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:57,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:57,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:57,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:57,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:57,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:57,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:57,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:57,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:57,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:57,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:57,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:57,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:57,305 INFO L354 Elim1Store]: treesize reduction 187, result has 0.5 percent of original size [2021-11-13 18:47:57,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 16 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 13 case distinctions, treesize of input 96 treesize of output 108 [2021-11-13 18:47:58,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:58,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:58,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:58,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:58,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:58,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:58,687 INFO L354 Elim1Store]: treesize reduction 550, result has 11.9 percent of original size [2021-11-13 18:47:58,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 54 case distinctions, treesize of input 97 treesize of output 112 [2021-11-13 18:48:00,510 INFO L354 Elim1Store]: treesize reduction 357, result has 2.7 percent of original size [2021-11-13 18:48:00,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 126 treesize of output 77 [2021-11-13 18:48:00,861 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 13 proven. 108 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 18:48:00,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:49:17,324 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_366| Int)) (or (< (+ 3 |v_ULTIMATE.start_main_~i~0#1_366|) c_~N~0) (let ((.cse1 (let ((.cse8 (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|)) (.cse10 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse2 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse10))) (.cse5 (select .cse8 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse7 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse8 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse2 .cse5))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse10 4)))) (let ((.cse3 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse8 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse2 .cse5 .cse7))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8 .cse10))) (.cse9 (* |v_ULTIMATE.start_main_~i~0#1_366| 4))) (let ((.cse6 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse8 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse2 .cse3 .cse5 .cse7))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse9)))) (let ((.cse4 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse8 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse2 .cse3 .cse5 .cse6 .cse7))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse9 4)))) (+ .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse8 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse2 .cse3 .cse4 .cse5 .cse6 .cse7))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8 .cse9)))))))))) (.cse0 (* 5 c_~N~0))) (and (<= .cse0 .cse1) (<= .cse1 .cse0))) (<= c_~N~0 (+ 2 |v_ULTIMATE.start_main_~i~0#1_366|)))) is different from false