./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/pr2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-tiling/pr2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX --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 5922a5be589e27d89439744489152c928c7510f0140c8b0fb4d1faadee969752 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 09:40:49,001 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 09:40:49,003 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 09:40:49,049 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 09:40:49,050 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 09:40:49,054 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 09:40:49,057 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 09:40:49,061 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 09:40:49,064 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 09:40:49,071 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 09:40:49,072 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 09:40:49,074 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 09:40:49,075 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 09:40:49,078 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 09:40:49,081 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 09:40:49,088 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 09:40:49,092 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 09:40:49,093 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 09:40:49,095 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 09:40:49,102 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 09:40:49,105 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 09:40:49,107 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 09:40:49,110 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 09:40:49,111 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 09:40:49,118 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 09:40:49,118 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 09:40:49,119 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 09:40:49,121 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 09:40:49,122 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 09:40:49,123 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 09:40:49,124 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 09:40:49,125 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 09:40:49,127 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 09:40:49,129 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 09:40:49,130 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 09:40:49,131 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 09:40:49,132 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 09:40:49,132 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 09:40:49,132 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 09:40:49,133 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 09:40:49,134 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 09:40:49,135 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 09:40:49,182 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 09:40:49,182 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 09:40:49,183 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 09:40:49,183 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 09:40:49,185 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 09:40:49,185 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 09:40:49,185 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 09:40:49,185 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 09:40:49,186 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 09:40:49,186 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 09:40:49,187 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 09:40:49,187 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 09:40:49,187 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 09:40:49,188 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 09:40:49,188 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 09:40:49,188 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 09:40:49,188 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 09:40:49,188 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 09:40:49,189 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 09:40:49,189 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 09:40:49,189 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 09:40:49,189 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 09:40:49,189 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:40:49,190 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 09:40:49,190 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 09:40:49,190 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 09:40:49,190 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 09:40:49,191 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 09:40:49,191 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 09:40:49,191 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 09:40:49,191 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 09:40:49,191 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 09:40:49,192 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_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5922a5be589e27d89439744489152c928c7510f0140c8b0fb4d1faadee969752 [2021-11-09 09:40:49,539 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 09:40:49,568 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 09:40:49,571 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 09:40:49,573 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 09:40:49,574 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 09:40:49,575 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/array-tiling/pr2.c [2021-11-09 09:40:49,645 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/data/206a43283/2a576ff1229a48dc84e8956a893cde62/FLAGd0202b99d [2021-11-09 09:40:50,076 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 09:40:50,077 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/sv-benchmarks/c/array-tiling/pr2.c [2021-11-09 09:40:50,084 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/data/206a43283/2a576ff1229a48dc84e8956a893cde62/FLAGd0202b99d [2021-11-09 09:40:50,458 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/data/206a43283/2a576ff1229a48dc84e8956a893cde62 [2021-11-09 09:40:50,461 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 09:40:50,462 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 09:40:50,464 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 09:40:50,464 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 09:40:50,467 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 09:40:50,468 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:40:50" (1/1) ... [2021-11-09 09:40:50,469 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a7d841d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:40:50, skipping insertion in model container [2021-11-09 09:40:50,470 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:40:50" (1/1) ... [2021-11-09 09:40:50,477 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 09:40:50,491 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 09:40:50,659 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_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/sv-benchmarks/c/array-tiling/pr2.c[394,407] [2021-11-09 09:40:50,676 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:40:50,685 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 09:40:50,700 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_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/sv-benchmarks/c/array-tiling/pr2.c[394,407] [2021-11-09 09:40:50,709 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:40:50,724 INFO L208 MainTranslator]: Completed translation [2021-11-09 09:40:50,725 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:40:50 WrapperNode [2021-11-09 09:40:50,725 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 09:40:50,727 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 09:40:50,727 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 09:40:50,727 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 09:40:50,736 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:40:50" (1/1) ... [2021-11-09 09:40:50,744 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:40:50" (1/1) ... [2021-11-09 09:40:50,768 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 09:40:50,769 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 09:40:50,769 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 09:40:50,769 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 09:40:50,778 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:40:50" (1/1) ... [2021-11-09 09:40:50,778 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:40:50" (1/1) ... [2021-11-09 09:40:50,781 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:40:50" (1/1) ... [2021-11-09 09:40:50,781 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:40:50" (1/1) ... [2021-11-09 09:40:50,788 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:40:50" (1/1) ... [2021-11-09 09:40:50,792 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:40:50" (1/1) ... [2021-11-09 09:40:50,794 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:40:50" (1/1) ... [2021-11-09 09:40:50,797 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 09:40:50,798 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 09:40:50,798 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 09:40:50,798 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 09:40:50,799 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:40:50" (1/1) ... [2021-11-09 09:40:50,812 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:40:50,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:40:50,845 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 09:40:50,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 09:40:50,903 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 09:40:50,903 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 09:40:50,904 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-09 09:40:50,904 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 09:40:50,904 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 09:40:50,904 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-09 09:40:50,904 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-09 09:40:51,144 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 09:40:51,145 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-11-09 09:40:51,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:40:51 BoogieIcfgContainer [2021-11-09 09:40:51,147 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 09:40:51,149 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 09:40:51,149 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 09:40:51,153 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 09:40:51,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 09:40:50" (1/3) ... [2021-11-09 09:40:51,155 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73fe0740 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:40:51, skipping insertion in model container [2021-11-09 09:40:51,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:40:50" (2/3) ... [2021-11-09 09:40:51,156 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73fe0740 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:40:51, skipping insertion in model container [2021-11-09 09:40:51,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:40:51" (3/3) ... [2021-11-09 09:40:51,157 INFO L111 eAbstractionObserver]: Analyzing ICFG pr2.c [2021-11-09 09:40:51,163 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 09:40:51,163 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-09 09:40:51,214 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 09:40:51,222 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 [2021-11-09 09:40:51,222 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-09 09:40:51,238 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 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) [2021-11-09 09:40:51,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-09 09:40:51,245 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:40:51,245 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:40:51,246 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:40:51,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:40:51,252 INFO L85 PathProgramCache]: Analyzing trace with hash -583465863, now seen corresponding path program 1 times [2021-11-09 09:40:51,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:40:51,262 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042117093] [2021-11-09 09:40:51,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:40:51,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:40:51,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:51,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:40:51,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:40:51,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042117093] [2021-11-09 09:40:51,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042117093] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:40:51,430 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:40:51,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 09:40:51,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686018635] [2021-11-09 09:40:51,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-09 09:40:51,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:40:51,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-09 09:40:51,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 09:40:51,453 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 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) 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) [2021-11-09 09:40:51,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:40:51,468 INFO L93 Difference]: Finished difference Result 43 states and 60 transitions. [2021-11-09 09:40:51,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-09 09:40:51,469 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 [2021-11-09 09:40:51,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:40:51,477 INFO L225 Difference]: With dead ends: 43 [2021-11-09 09:40:51,477 INFO L226 Difference]: Without dead ends: 19 [2021-11-09 09:40:51,480 INFO L786 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 [2021-11-09 09:40:51,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-09 09:40:51,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-09 09:40:51,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:51,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-11-09 09:40:51,513 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 13 [2021-11-09 09:40:51,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:40:51,513 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-11-09 09:40:51,514 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) [2021-11-09 09:40:51,514 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-11-09 09:40:51,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-09 09:40:51,515 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:40:51,515 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:40:51,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 09:40:51,516 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:40:51,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:40:51,517 INFO L85 PathProgramCache]: Analyzing trace with hash 96592507, now seen corresponding path program 1 times [2021-11-09 09:40:51,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:40:51,518 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39649319] [2021-11-09 09:40:51,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:40:51,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:40:51,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:51,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:40:51,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:40:51,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39649319] [2021-11-09 09:40:51,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39649319] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:40:51,632 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:40:51,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:40:51,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439970033] [2021-11-09 09:40:51,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:40:51,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:40:51,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:40:51,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:40:51,636 INFO L87 Difference]: Start difference. First operand 19 states and 23 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) [2021-11-09 09:40:51,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:40:51,701 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2021-11-09 09:40:51,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 09:40:51,702 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 [2021-11-09 09:40:51,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:40:51,703 INFO L225 Difference]: With dead ends: 28 [2021-11-09 09:40:51,703 INFO L226 Difference]: Without dead ends: 26 [2021-11-09 09:40:51,704 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:40:51,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-09 09:40:51,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2021-11-09 09:40:51,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 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) [2021-11-09 09:40:51,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-11-09 09:40:51,712 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2021-11-09 09:40:51,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:40:51,714 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-11-09 09:40:51,714 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) [2021-11-09 09:40:51,715 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-11-09 09:40:51,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-09 09:40:51,716 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:40:51,716 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:40:51,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 09:40:51,717 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:40:51,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:40:51,719 INFO L85 PathProgramCache]: Analyzing trace with hash 96652089, now seen corresponding path program 1 times [2021-11-09 09:40:51,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:40:51,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733092664] [2021-11-09 09:40:51,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:40:51,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:40:51,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:52,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:40:52,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:40:52,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733092664] [2021-11-09 09:40:52,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733092664] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:40:52,097 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:40:52,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:40:52,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201985418] [2021-11-09 09:40:52,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:40:52,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:40:52,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:40:52,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:40:52,100 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2021-11-09 09:40:52,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:40:52,180 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2021-11-09 09:40:52,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 09:40:52,181 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 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 [2021-11-09 09:40:52,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:40:52,182 INFO L225 Difference]: With dead ends: 36 [2021-11-09 09:40:52,182 INFO L226 Difference]: Without dead ends: 25 [2021-11-09 09:40:52,182 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:40:52,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-09 09:40:52,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2021-11-09 09:40:52,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:52,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2021-11-09 09:40:52,187 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 13 [2021-11-09 09:40:52,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:40:52,188 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2021-11-09 09:40:52,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2021-11-09 09:40:52,188 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2021-11-09 09:40:52,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-09 09:40:52,189 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:40:52,189 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:40:52,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-09 09:40:52,189 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:40:52,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:40:52,190 INFO L85 PathProgramCache]: Analyzing trace with hash 37256114, now seen corresponding path program 1 times [2021-11-09 09:40:52,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:40:52,191 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351183874] [2021-11-09 09:40:52,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:40:52,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:40:52,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:52,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:40:52,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:40:52,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351183874] [2021-11-09 09:40:52,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351183874] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:40:52,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615660763] [2021-11-09 09:40:52,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:40:52,564 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:40:52,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:40:52,570 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:40:52,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 09:40:52,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:52,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-09 09:40:52,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:40:52,814 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 20 treesize of output 16 [2021-11-09 09:40:52,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:40:52,889 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 21 treesize of output 20 [2021-11-09 09:40:53,011 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 27 treesize of output 19 [2021-11-09 09:40:53,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:40:53,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615660763] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:40:53,078 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:40:53,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-11-09 09:40:53,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379658522] [2021-11-09 09:40:53,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-09 09:40:53,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:40:53,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-09 09:40:53,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-11-09 09:40:53,088 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 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) [2021-11-09 09:40:53,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:40:53,699 INFO L93 Difference]: Finished difference Result 103 states and 122 transitions. [2021-11-09 09:40:53,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-09 09:40:53,699 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-09 09:40:53,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:40:53,702 INFO L225 Difference]: With dead ends: 103 [2021-11-09 09:40:53,705 INFO L226 Difference]: Without dead ends: 93 [2021-11-09 09:40:53,707 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=220, Invalid=650, Unknown=0, NotChecked=0, Total=870 [2021-11-09 09:40:53,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-09 09:40:53,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 29. [2021-11-09 09:40:53,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 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) [2021-11-09 09:40:53,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2021-11-09 09:40:53,723 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 17 [2021-11-09 09:40:53,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:40:53,724 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2021-11-09 09:40:53,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 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) [2021-11-09 09:40:53,725 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2021-11-09 09:40:53,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-09 09:40:53,726 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:40:53,726 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:40:53,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 09:40:53,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:40:53,955 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:40:53,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:40:53,955 INFO L85 PathProgramCache]: Analyzing trace with hash -355770896, now seen corresponding path program 1 times [2021-11-09 09:40:53,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:40:53,956 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062193514] [2021-11-09 09:40:53,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:40:53,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:40:53,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:54,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:40:54,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:40:54,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062193514] [2021-11-09 09:40:54,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062193514] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:40:54,017 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:40:54,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:40:54,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568810966] [2021-11-09 09:40:54,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:40:54,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:40:54,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:40:54,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:40:54,019 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:54,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:40:54,046 INFO L93 Difference]: Finished difference Result 54 states and 66 transitions. [2021-11-09 09:40:54,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:40:54,046 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-09 09:40:54,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:40:54,047 INFO L225 Difference]: With dead ends: 54 [2021-11-09 09:40:54,047 INFO L226 Difference]: Without dead ends: 39 [2021-11-09 09:40:54,048 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:40:54,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-09 09:40:54,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 29. [2021-11-09 09:40:54,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.25) internal successors, (35), 28 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) [2021-11-09 09:40:54,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2021-11-09 09:40:54,053 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 17 [2021-11-09 09:40:54,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:40:54,053 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2021-11-09 09:40:54,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:54,053 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2021-11-09 09:40:54,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-09 09:40:54,054 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:40:54,054 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:40:54,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-09 09:40:54,055 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:40:54,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:40:54,055 INFO L85 PathProgramCache]: Analyzing trace with hash 324287474, now seen corresponding path program 1 times [2021-11-09 09:40:54,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:40:54,055 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683180703] [2021-11-09 09:40:54,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:40:54,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:40:54,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:54,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:40:54,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:40:54,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683180703] [2021-11-09 09:40:54,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683180703] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:40:54,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444016650] [2021-11-09 09:40:54,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:40:54,250 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:40:54,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:40:54,251 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:40:54,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 09:40:54,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:54,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-09 09:40:54,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:40:54,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-09 09:40:54,411 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 0 case distinctions, treesize of input 26 treesize of output 21 [2021-11-09 09:40:54,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:40:54,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:40:54,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 16 treesize of output 20 [2021-11-09 09:40:54,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:40:54,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444016650] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:40:54,555 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:40:54,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-09 09:40:54,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501709888] [2021-11-09 09:40:54,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-09 09:40:54,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:40:54,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-09 09:40:54,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-09 09:40:54,567 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 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) [2021-11-09 09:40:55,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:40:55,007 INFO L93 Difference]: Finished difference Result 83 states and 100 transitions. [2021-11-09 09:40:55,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-09 09:40:55,008 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-09 09:40:55,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:40:55,009 INFO L225 Difference]: With dead ends: 83 [2021-11-09 09:40:55,009 INFO L226 Difference]: Without dead ends: 81 [2021-11-09 09:40:55,010 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2021-11-09 09:40:55,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-09 09:40:55,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 43. [2021-11-09 09:40:55,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.2857142857142858) internal successors, (54), 42 states have internal predecessors, (54), 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) [2021-11-09 09:40:55,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2021-11-09 09:40:55,017 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 17 [2021-11-09 09:40:55,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:40:55,017 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2021-11-09 09:40:55,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 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) [2021-11-09 09:40:55,018 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2021-11-09 09:40:55,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-09 09:40:55,019 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:40:55,019 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:40:55,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 09:40:55,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-09 09:40:55,220 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:40:55,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:40:55,221 INFO L85 PathProgramCache]: Analyzing trace with hash -2078603285, now seen corresponding path program 1 times [2021-11-09 09:40:55,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:40:55,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983442472] [2021-11-09 09:40:55,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:40:55,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:40:55,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:55,276 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:40:55,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:40:55,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983442472] [2021-11-09 09:40:55,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983442472] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:40:55,277 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:40:55,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:40:55,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271343015] [2021-11-09 09:40:55,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:40:55,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:40:55,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:40:55,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:40:55,279 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 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) [2021-11-09 09:40:55,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:40:55,296 INFO L93 Difference]: Finished difference Result 68 states and 83 transitions. [2021-11-09 09:40:55,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:40:55,297 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 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) Word has length 21 [2021-11-09 09:40:55,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:40:55,298 INFO L225 Difference]: With dead ends: 68 [2021-11-09 09:40:55,298 INFO L226 Difference]: Without dead ends: 53 [2021-11-09 09:40:55,298 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:40:55,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-09 09:40:55,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 43. [2021-11-09 09:40:55,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 42 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) [2021-11-09 09:40:55,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2021-11-09 09:40:55,305 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 21 [2021-11-09 09:40:55,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:40:55,305 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2021-11-09 09:40:55,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 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) [2021-11-09 09:40:55,306 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2021-11-09 09:40:55,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-09 09:40:55,307 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:40:55,307 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:40:55,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-09 09:40:55,307 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:40:55,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:40:55,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1011467757, now seen corresponding path program 1 times [2021-11-09 09:40:55,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:40:55,308 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670811782] [2021-11-09 09:40:55,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:40:55,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:40:55,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:55,341 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:40:55,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:40:55,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670811782] [2021-11-09 09:40:55,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670811782] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:40:55,341 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:40:55,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:40:55,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178354973] [2021-11-09 09:40:55,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:40:55,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:40:55,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:40:55,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:40:55,343 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 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) [2021-11-09 09:40:55,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:40:55,358 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2021-11-09 09:40:55,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:40:55,359 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 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) Word has length 21 [2021-11-09 09:40:55,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:40:55,359 INFO L225 Difference]: With dead ends: 63 [2021-11-09 09:40:55,360 INFO L226 Difference]: Without dead ends: 48 [2021-11-09 09:40:55,360 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:40:55,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-09 09:40:55,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2021-11-09 09:40:55,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 37 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:55,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2021-11-09 09:40:55,370 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 21 [2021-11-09 09:40:55,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:40:55,371 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2021-11-09 09:40:55,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 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) [2021-11-09 09:40:55,371 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2021-11-09 09:40:55,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-09 09:40:55,372 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:40:55,372 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:40:55,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-09 09:40:55,373 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:40:55,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:40:55,373 INFO L85 PathProgramCache]: Analyzing trace with hash 2125491333, now seen corresponding path program 1 times [2021-11-09 09:40:55,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:40:55,374 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748359139] [2021-11-09 09:40:55,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:40:55,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:40:55,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:55,663 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:40:55,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:40:55,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748359139] [2021-11-09 09:40:55,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748359139] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:40:55,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740239607] [2021-11-09 09:40:55,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:40:55,664 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:40:55,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:40:55,667 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:40:55,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 09:40:55,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:55,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-09 09:40:55,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:40:55,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-09 09:40:55,973 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 31 treesize of output 19 [2021-11-09 09:40:56,005 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:40:56,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740239607] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:40:56,006 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:40:56,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-11-09 09:40:56,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103807116] [2021-11-09 09:40:56,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-09 09:40:56,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:40:56,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-09 09:40:56,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-11-09 09:40:56,008 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-11-09 09:40:56,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:40:56,241 INFO L93 Difference]: Finished difference Result 94 states and 109 transitions. [2021-11-09 09:40:56,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-09 09:40:56,242 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 23 [2021-11-09 09:40:56,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:40:56,243 INFO L225 Difference]: With dead ends: 94 [2021-11-09 09:40:56,243 INFO L226 Difference]: Without dead ends: 77 [2021-11-09 09:40:56,244 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-11-09 09:40:56,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-09 09:40:56,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 50. [2021-11-09 09:40:56,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 49 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) [2021-11-09 09:40:56,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2021-11-09 09:40:56,270 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 23 [2021-11-09 09:40:56,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:40:56,274 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2021-11-09 09:40:56,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-11-09 09:40:56,276 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2021-11-09 09:40:56,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-09 09:40:56,278 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:40:56,278 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:40:56,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 09:40:56,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:40:56,507 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:40:56,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:40:56,507 INFO L85 PathProgramCache]: Analyzing trace with hash 845627655, now seen corresponding path program 1 times [2021-11-09 09:40:56,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:40:56,507 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541370983] [2021-11-09 09:40:56,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:40:56,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:40:56,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:56,667 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:40:56,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:40:56,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541370983] [2021-11-09 09:40:56,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541370983] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:40:56,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879157832] [2021-11-09 09:40:56,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:40:56,669 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:40:56,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:40:56,672 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:40:56,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 09:40:56,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:56,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-09 09:40:56,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:40:56,802 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 [2021-11-09 09:40:56,946 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:40:56,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879157832] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:40:56,946 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:40:56,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-11-09 09:40:56,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264371781] [2021-11-09 09:40:56,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-09 09:40:56,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:40:56,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-09 09:40:56,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-11-09 09:40:56,950 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 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) [2021-11-09 09:40:57,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:40:57,335 INFO L93 Difference]: Finished difference Result 107 states and 123 transitions. [2021-11-09 09:40:57,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-09 09:40:57,336 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-09 09:40:57,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:40:57,337 INFO L225 Difference]: With dead ends: 107 [2021-11-09 09:40:57,337 INFO L226 Difference]: Without dead ends: 105 [2021-11-09 09:40:57,338 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=250, Invalid=742, Unknown=0, NotChecked=0, Total=992 [2021-11-09 09:40:57,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-09 09:40:57,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 57. [2021-11-09 09:40:57,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.2142857142857142) internal successors, (68), 56 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) [2021-11-09 09:40:57,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2021-11-09 09:40:57,349 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 23 [2021-11-09 09:40:57,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:40:57,349 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2021-11-09 09:40:57,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 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) [2021-11-09 09:40:57,349 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2021-11-09 09:40:57,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-09 09:40:57,351 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:40:57,351 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:40:57,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-09 09:40:57,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-09 09:40:57,552 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:40:57,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:40:57,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1664572736, now seen corresponding path program 1 times [2021-11-09 09:40:57,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:40:57,552 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304881383] [2021-11-09 09:40:57,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:40:57,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:40:57,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:57,581 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 09:40:57,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:40:57,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304881383] [2021-11-09 09:40:57,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304881383] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:40:57,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:40:57,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:40:57,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012986972] [2021-11-09 09:40:57,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:40:57,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:40:57,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:40:57,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:40:57,583 INFO L87 Difference]: Start difference. First operand 57 states and 68 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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) [2021-11-09 09:40:57,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:40:57,601 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2021-11-09 09:40:57,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:40:57,601 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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 [2021-11-09 09:40:57,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:40:57,602 INFO L225 Difference]: With dead ends: 80 [2021-11-09 09:40:57,602 INFO L226 Difference]: Without dead ends: 63 [2021-11-09 09:40:57,603 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:40:57,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-09 09:40:57,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2021-11-09 09:40:57,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 51 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) [2021-11-09 09:40:57,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2021-11-09 09:40:57,611 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 27 [2021-11-09 09:40:57,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:40:57,611 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2021-11-09 09:40:57,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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) [2021-11-09 09:40:57,612 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2021-11-09 09:40:57,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-09 09:40:57,613 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:40:57,613 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:40:57,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-09 09:40:57,613 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:40:57,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:40:57,614 INFO L85 PathProgramCache]: Analyzing trace with hash -147377384, now seen corresponding path program 2 times [2021-11-09 09:40:57,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:40:57,614 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010288426] [2021-11-09 09:40:57,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:40:57,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:40:57,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:57,945 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:40:57,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:40:57,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010288426] [2021-11-09 09:40:57,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010288426] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:40:57,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841494840] [2021-11-09 09:40:57,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:40:57,946 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:40:57,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:40:57,947 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:40:57,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-09 09:40:58,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:40:58,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:40:58,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-09 09:40:58,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:40:58,518 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:40:58,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841494840] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:40:58,519 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:40:58,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-11-09 09:40:58,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976071583] [2021-11-09 09:40:58,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-09 09:40:58,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:40:58,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-09 09:40:58,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-11-09 09:40:58,521 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 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) [2021-11-09 09:40:58,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:40:58,744 INFO L93 Difference]: Finished difference Result 108 states and 122 transitions. [2021-11-09 09:40:58,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-09 09:40:58,745 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 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 29 [2021-11-09 09:40:58,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:40:58,746 INFO L225 Difference]: With dead ends: 108 [2021-11-09 09:40:58,746 INFO L226 Difference]: Without dead ends: 72 [2021-11-09 09:40:58,746 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2021-11-09 09:40:58,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-09 09:40:58,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 59. [2021-11-09 09:40:58,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 58 states have internal predecessors, (67), 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) [2021-11-09 09:40:58,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2021-11-09 09:40:58,755 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 29 [2021-11-09 09:40:58,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:40:58,755 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2021-11-09 09:40:58,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 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) [2021-11-09 09:40:58,755 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2021-11-09 09:40:58,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-09 09:40:58,756 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:40:58,757 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:40:58,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-09 09:40:58,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-09 09:40:58,957 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:40:58,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:40:58,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1385615761, now seen corresponding path program 3 times [2021-11-09 09:40:58,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:40:58,958 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164576423] [2021-11-09 09:40:58,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:40:58,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:40:58,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:59,155 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:40:59,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:40:59,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164576423] [2021-11-09 09:40:59,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164576423] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:40:59,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153687523] [2021-11-09 09:40:59,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:40:59,157 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:40:59,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:40:59,170 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:40:59,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-09 09:40:59,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-09 09:40:59,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:40:59,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-09 09:40:59,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:40:59,451 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 20 treesize of output 16 [2021-11-09 09:40:59,500 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-09 09:40:59,500 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 29 treesize of output 28 [2021-11-09 09:40:59,891 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:40:59,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153687523] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:40:59,891 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:40:59,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-11-09 09:40:59,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126779830] [2021-11-09 09:40:59,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 09:40:59,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:40:59,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 09:40:59,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-11-09 09:40:59,894 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 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) [2021-11-09 09:41:00,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:41:00,542 INFO L93 Difference]: Finished difference Result 105 states and 116 transitions. [2021-11-09 09:41:00,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-09 09:41:00,543 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 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 33 [2021-11-09 09:41:00,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:41:00,544 INFO L225 Difference]: With dead ends: 105 [2021-11-09 09:41:00,544 INFO L226 Difference]: Without dead ends: 95 [2021-11-09 09:41:00,545 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=218, Invalid=1042, Unknown=0, NotChecked=0, Total=1260 [2021-11-09 09:41:00,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-09 09:41:00,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 65. [2021-11-09 09:41:00,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.140625) internal successors, (73), 64 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:41:00,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2021-11-09 09:41:00,556 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 33 [2021-11-09 09:41:00,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:41:00,557 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2021-11-09 09:41:00,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 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) [2021-11-09 09:41:00,557 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2021-11-09 09:41:00,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-09 09:41:00,558 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:41:00,558 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:41:00,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-09 09:41:00,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:41:00,759 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:41:00,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:41:00,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1948866197, now seen corresponding path program 2 times [2021-11-09 09:41:00,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:41:00,760 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169039249] [2021-11-09 09:41:00,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:41:00,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:41:00,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:00,925 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:41:00,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:41:00,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169039249] [2021-11-09 09:41:00,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169039249] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:41:00,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103124008] [2021-11-09 09:41:00,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:41:00,926 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:41:00,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:41:00,927 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:41:00,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-09 09:41:01,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:41:01,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:41:01,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-09 09:41:01,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:41:01,155 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 20 treesize of output 16 [2021-11-09 09:41:01,179 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 0 case distinctions, treesize of input 43 treesize of output 38 [2021-11-09 09:41:01,189 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-11-09 09:41:01,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 63 treesize of output 67 [2021-11-09 09:41:01,297 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-09 09:41:01,297 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:41:01,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-09 09:41:01,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211191647] [2021-11-09 09:41:01,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 09:41:01,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:41:01,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 09:41:01,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-09 09:41:01,299 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 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) [2021-11-09 09:41:01,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:41:01,620 INFO L93 Difference]: Finished difference Result 122 states and 135 transitions. [2021-11-09 09:41:01,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-09 09:41:01,620 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 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 33 [2021-11-09 09:41:01,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:41:01,621 INFO L225 Difference]: With dead ends: 122 [2021-11-09 09:41:01,621 INFO L226 Difference]: Without dead ends: 112 [2021-11-09 09:41:01,622 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-11-09 09:41:01,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-11-09 09:41:01,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 71. [2021-11-09 09:41:01,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.1428571428571428) internal successors, (80), 70 states have internal predecessors, (80), 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) [2021-11-09 09:41:01,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 80 transitions. [2021-11-09 09:41:01,648 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 80 transitions. Word has length 33 [2021-11-09 09:41:01,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:41:01,648 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 80 transitions. [2021-11-09 09:41:01,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 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) [2021-11-09 09:41:01,649 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 80 transitions. [2021-11-09 09:41:01,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-09 09:41:01,650 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:41:01,650 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:41:01,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-09 09:41:01,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-09 09:41:01,871 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:41:01,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:41:01,872 INFO L85 PathProgramCache]: Analyzing trace with hash -2065206767, now seen corresponding path program 1 times [2021-11-09 09:41:01,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:41:01,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927710583] [2021-11-09 09:41:01,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:41:01,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:41:01,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:02,029 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:41:02,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:41:02,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927710583] [2021-11-09 09:41:02,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927710583] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:41:02,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989771164] [2021-11-09 09:41:02,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:41:02,032 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:41:02,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:41:02,046 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:41:02,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-09 09:41:02,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:02,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-09 09:41:02,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:41:02,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-09 09:41:02,280 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 0 case distinctions, treesize of input 43 treesize of output 38 [2021-11-09 09:41:02,290 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-11-09 09:41:02,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 59 treesize of output 63 [2021-11-09 09:41:02,362 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-09 09:41:02,362 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:41:02,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-09 09:41:02,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56908007] [2021-11-09 09:41:02,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 09:41:02,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:41:02,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 09:41:02,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-09 09:41:02,365 INFO L87 Difference]: Start difference. First operand 71 states and 80 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 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) [2021-11-09 09:41:02,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:41:02,853 INFO L93 Difference]: Finished difference Result 123 states and 136 transitions. [2021-11-09 09:41:02,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-09 09:41:02,854 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 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 33 [2021-11-09 09:41:02,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:41:02,855 INFO L225 Difference]: With dead ends: 123 [2021-11-09 09:41:02,855 INFO L226 Difference]: Without dead ends: 121 [2021-11-09 09:41:02,856 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2021-11-09 09:41:02,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-11-09 09:41:02,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 77. [2021-11-09 09:41:02,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.144736842105263) internal successors, (87), 76 states have internal predecessors, (87), 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) [2021-11-09 09:41:02,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2021-11-09 09:41:02,867 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 33 [2021-11-09 09:41:02,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:41:02,867 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2021-11-09 09:41:02,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 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) [2021-11-09 09:41:02,867 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2021-11-09 09:41:02,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-09 09:41:02,869 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:41:02,869 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:41:02,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-09 09:41:03,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-09 09:41:03,086 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:41:03,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:41:03,087 INFO L85 PathProgramCache]: Analyzing trace with hash 382246692, now seen corresponding path program 4 times [2021-11-09 09:41:03,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:41:03,087 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941122011] [2021-11-09 09:41:03,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:41:03,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:41:03,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:03,422 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:41:03,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:41:03,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941122011] [2021-11-09 09:41:03,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941122011] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:41:03,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051034420] [2021-11-09 09:41:03,423 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:41:03,423 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:41:03,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:41:03,431 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:41:03,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-09 09:41:03,632 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:41:03,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:41:03,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-09 09:41:03,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:41:03,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-09 09:41:03,962 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 31 treesize of output 19 [2021-11-09 09:41:03,991 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:41:03,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051034420] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:41:03,991 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:41:03,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-11-09 09:41:03,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604750878] [2021-11-09 09:41:03,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 09:41:03,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:41:03,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 09:41:03,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-11-09 09:41:03,994 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:41:04,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:41:04,384 INFO L93 Difference]: Finished difference Result 134 states and 148 transitions. [2021-11-09 09:41:04,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-09 09:41:04,384 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-09 09:41:04,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:41:04,385 INFO L225 Difference]: With dead ends: 134 [2021-11-09 09:41:04,386 INFO L226 Difference]: Without dead ends: 124 [2021-11-09 09:41:04,386 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=183, Invalid=809, Unknown=0, NotChecked=0, Total=992 [2021-11-09 09:41:04,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-11-09 09:41:04,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 83. [2021-11-09 09:41:04,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.1341463414634145) internal successors, (93), 82 states have internal predecessors, (93), 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) [2021-11-09 09:41:04,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 93 transitions. [2021-11-09 09:41:04,396 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 93 transitions. Word has length 39 [2021-11-09 09:41:04,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:41:04,396 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 93 transitions. [2021-11-09 09:41:04,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:41:04,397 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 93 transitions. [2021-11-09 09:41:04,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-09 09:41:04,398 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:41:04,398 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:41:04,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-09 09:41:04,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-09 09:41:04,598 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:41:04,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:41:04,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1287892696, now seen corresponding path program 3 times [2021-11-09 09:41:04,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:41:04,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789135418] [2021-11-09 09:41:04,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:41:04,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:41:04,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:04,850 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:41:04,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:41:04,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789135418] [2021-11-09 09:41:04,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789135418] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:41:04,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69537935] [2021-11-09 09:41:04,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:41:04,851 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:41:04,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:41:04,852 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:41:04,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-09 09:41:05,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-09 09:41:05,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:41:05,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-09 09:41:05,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:41:05,196 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 [2021-11-09 09:41:05,461 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:41:05,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69537935] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:41:05,461 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:41:05,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-11-09 09:41:05,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970626849] [2021-11-09 09:41:05,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-09 09:41:05,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:41:05,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-09 09:41:05,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-11-09 09:41:05,463 INFO L87 Difference]: Start difference. First operand 83 states and 93 transitions. Second operand has 20 states, 20 states have (on average 3.75) internal successors, (75), 20 states have internal predecessors, (75), 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) [2021-11-09 09:41:06,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:41:06,267 INFO L93 Difference]: Finished difference Result 174 states and 193 transitions. [2021-11-09 09:41:06,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-09 09:41:06,268 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.75) internal successors, (75), 20 states have internal predecessors, (75), 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 [2021-11-09 09:41:06,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:41:06,269 INFO L225 Difference]: With dead ends: 174 [2021-11-09 09:41:06,269 INFO L226 Difference]: Without dead ends: 172 [2021-11-09 09:41:06,270 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=399, Invalid=1581, Unknown=0, NotChecked=0, Total=1980 [2021-11-09 09:41:06,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-11-09 09:41:06,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 95. [2021-11-09 09:41:06,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.127659574468085) internal successors, (106), 94 states have internal predecessors, (106), 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) [2021-11-09 09:41:06,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 106 transitions. [2021-11-09 09:41:06,282 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 106 transitions. Word has length 39 [2021-11-09 09:41:06,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:41:06,282 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 106 transitions. [2021-11-09 09:41:06,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.75) internal successors, (75), 20 states have internal predecessors, (75), 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) [2021-11-09 09:41:06,282 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 106 transitions. [2021-11-09 09:41:06,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-09 09:41:06,284 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:41:06,285 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:41:06,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-09 09:41:06,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-09 09:41:06,503 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:41:06,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:41:06,503 INFO L85 PathProgramCache]: Analyzing trace with hash -270486921, now seen corresponding path program 5 times [2021-11-09 09:41:06,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:41:06,503 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328953849] [2021-11-09 09:41:06,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:41:06,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:41:06,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:06,863 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 33 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:41:06,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:41:06,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328953849] [2021-11-09 09:41:06,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328953849] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:41:06,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878013368] [2021-11-09 09:41:06,864 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:41:06,864 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:41:06,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:41:06,867 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:41:06,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-09 09:41:07,202 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-09 09:41:07,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:41:07,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-09 09:41:07,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:41:08,056 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 52 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:41:08,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878013368] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:41:08,057 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:41:08,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-11-09 09:41:08,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814578389] [2021-11-09 09:41:08,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-09 09:41:08,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:41:08,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-09 09:41:08,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=374, Unknown=0, NotChecked=0, Total=506 [2021-11-09 09:41:08,060 INFO L87 Difference]: Start difference. First operand 95 states and 106 transitions. Second operand has 23 states, 23 states have (on average 3.608695652173913) internal successors, (83), 23 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:41:08,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:41:08,394 INFO L93 Difference]: Finished difference Result 188 states and 208 transitions. [2021-11-09 09:41:08,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-09 09:41:08,395 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.608695652173913) internal successors, (83), 23 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-09 09:41:08,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:41:08,396 INFO L225 Difference]: With dead ends: 188 [2021-11-09 09:41:08,396 INFO L226 Difference]: Without dead ends: 116 [2021-11-09 09:41:08,398 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=222, Invalid=590, Unknown=0, NotChecked=0, Total=812 [2021-11-09 09:41:08,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-11-09 09:41:08,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 107. [2021-11-09 09:41:08,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.1132075471698113) internal successors, (118), 106 states have internal predecessors, (118), 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) [2021-11-09 09:41:08,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 118 transitions. [2021-11-09 09:41:08,411 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 118 transitions. Word has length 45 [2021-11-09 09:41:08,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:41:08,412 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 118 transitions. [2021-11-09 09:41:08,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.608695652173913) internal successors, (83), 23 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:41:08,412 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 118 transitions. [2021-11-09 09:41:08,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-09 09:41:08,413 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:41:08,413 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:41:08,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-09 09:41:08,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-09 09:41:08,618 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:41:08,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:41:08,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1534181648, now seen corresponding path program 6 times [2021-11-09 09:41:08,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:41:08,619 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923241735] [2021-11-09 09:41:08,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:41:08,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:41:08,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:08,985 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 8 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:41:08,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:41:08,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923241735] [2021-11-09 09:41:08,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923241735] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:41:08,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097877749] [2021-11-09 09:41:08,986 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:41:08,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:41:08,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:41:08,992 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:41:09,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-09 09:41:09,295 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-09 09:41:09,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:41:09,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-09 09:41:09,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:41:09,491 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 20 treesize of output 16 [2021-11-09 09:41:09,546 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-09 09:41:09,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-09 09:41:10,209 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 8 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:41:10,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097877749] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:41:10,210 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:41:10,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2021-11-09 09:41:10,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275383216] [2021-11-09 09:41:10,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-09 09:41:10,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:41:10,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-09 09:41:10,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2021-11-09 09:41:10,212 INFO L87 Difference]: Start difference. First operand 107 states and 118 transitions. Second operand has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 states have internal predecessors, (87), 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) [2021-11-09 09:41:11,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:41:11,349 INFO L93 Difference]: Finished difference Result 171 states and 187 transitions. [2021-11-09 09:41:11,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-09 09:41:11,352 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 states have internal predecessors, (87), 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 49 [2021-11-09 09:41:11,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:41:11,353 INFO L225 Difference]: With dead ends: 171 [2021-11-09 09:41:11,353 INFO L226 Difference]: Without dead ends: 161 [2021-11-09 09:41:11,354 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=280, Invalid=1882, Unknown=0, NotChecked=0, Total=2162 [2021-11-09 09:41:11,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-11-09 09:41:11,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 113. [2021-11-09 09:41:11,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.1071428571428572) internal successors, (124), 112 states have internal predecessors, (124), 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) [2021-11-09 09:41:11,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 124 transitions. [2021-11-09 09:41:11,365 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 124 transitions. Word has length 49 [2021-11-09 09:41:11,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:41:11,366 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 124 transitions. [2021-11-09 09:41:11,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 states have internal predecessors, (87), 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) [2021-11-09 09:41:11,366 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 124 transitions. [2021-11-09 09:41:11,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-09 09:41:11,367 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:41:11,367 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:41:11,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-09 09:41:11,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:41:11,579 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:41:11,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:41:11,579 INFO L85 PathProgramCache]: Analyzing trace with hash -523389962, now seen corresponding path program 4 times [2021-11-09 09:41:11,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:41:11,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67848700] [2021-11-09 09:41:11,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:41:11,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:41:11,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:11,791 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 8 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:41:11,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:41:11,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67848700] [2021-11-09 09:41:11,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67848700] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:41:11,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453581271] [2021-11-09 09:41:11,792 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:41:11,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:41:11,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:41:11,795 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:41:11,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-09 09:41:12,111 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:41:12,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:41:12,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-09 09:41:12,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:41:12,237 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 20 treesize of output 16 [2021-11-09 09:41:12,260 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 0 case distinctions, treesize of input 43 treesize of output 38 [2021-11-09 09:41:12,271 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-11-09 09:41:12,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 63 treesize of output 67 [2021-11-09 09:41:12,391 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-09 09:41:12,391 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:41:12,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-11-09 09:41:12,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287353905] [2021-11-09 09:41:12,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-09 09:41:12,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:41:12,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-09 09:41:12,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-11-09 09:41:12,394 INFO L87 Difference]: Start difference. First operand 113 states and 124 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 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) [2021-11-09 09:41:13,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:41:13,003 INFO L93 Difference]: Finished difference Result 188 states and 206 transitions. [2021-11-09 09:41:13,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-09 09:41:13,004 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 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 49 [2021-11-09 09:41:13,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:41:13,006 INFO L225 Difference]: With dead ends: 188 [2021-11-09 09:41:13,006 INFO L226 Difference]: Without dead ends: 178 [2021-11-09 09:41:13,007 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=149, Invalid=907, Unknown=0, NotChecked=0, Total=1056 [2021-11-09 09:41:13,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-11-09 09:41:13,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 119. [2021-11-09 09:41:13,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.1101694915254237) internal successors, (131), 118 states have internal predecessors, (131), 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) [2021-11-09 09:41:13,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 131 transitions. [2021-11-09 09:41:13,022 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 131 transitions. Word has length 49 [2021-11-09 09:41:13,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:41:13,022 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 131 transitions. [2021-11-09 09:41:13,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 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) [2021-11-09 09:41:13,023 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 131 transitions. [2021-11-09 09:41:13,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-09 09:41:13,024 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:41:13,024 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:41:13,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-09 09:41:13,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:41:13,239 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:41:13,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:41:13,239 INFO L85 PathProgramCache]: Analyzing trace with hash 746381232, now seen corresponding path program 2 times [2021-11-09 09:41:13,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:41:13,239 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095687633] [2021-11-09 09:41:13,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:41:13,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:41:13,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:13,423 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:41:13,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:41:13,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095687633] [2021-11-09 09:41:13,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095687633] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:41:13,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099364329] [2021-11-09 09:41:13,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:41:13,424 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:41:13,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:41:13,426 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:41:13,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-09 09:41:13,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:41:13,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:41:13,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-09 09:41:13,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:41:13,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-09 09:41:13,853 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 0 case distinctions, treesize of input 43 treesize of output 38 [2021-11-09 09:41:13,864 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-11-09 09:41:13,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 59 treesize of output 63 [2021-11-09 09:41:13,934 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-09 09:41:13,934 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:41:13,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-11-09 09:41:13,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926086901] [2021-11-09 09:41:13,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-09 09:41:13,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:41:13,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-09 09:41:13,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-11-09 09:41:13,936 INFO L87 Difference]: Start difference. First operand 119 states and 131 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 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) [2021-11-09 09:41:14,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:41:14,881 INFO L93 Difference]: Finished difference Result 185 states and 202 transitions. [2021-11-09 09:41:14,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-09 09:41:14,881 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 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 49 [2021-11-09 09:41:14,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:41:14,883 INFO L225 Difference]: With dead ends: 185 [2021-11-09 09:41:14,883 INFO L226 Difference]: Without dead ends: 183 [2021-11-09 09:41:14,884 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=220, Invalid=1420, Unknown=0, NotChecked=0, Total=1640 [2021-11-09 09:41:14,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-11-09 09:41:14,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 125. [2021-11-09 09:41:14,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.1129032258064515) internal successors, (138), 124 states have internal predecessors, (138), 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) [2021-11-09 09:41:14,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 138 transitions. [2021-11-09 09:41:14,900 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 138 transitions. Word has length 49 [2021-11-09 09:41:14,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:41:14,900 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 138 transitions. [2021-11-09 09:41:14,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 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) [2021-11-09 09:41:14,901 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 138 transitions. [2021-11-09 09:41:14,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-09 09:41:14,901 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:41:14,902 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:41:14,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-09 09:41:15,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:41:15,107 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:41:15,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:41:15,107 INFO L85 PathProgramCache]: Analyzing trace with hash 2083146051, now seen corresponding path program 7 times [2021-11-09 09:41:15,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:41:15,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942147979] [2021-11-09 09:41:15,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:41:15,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:41:15,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:15,405 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 10 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:41:15,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:41:15,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942147979] [2021-11-09 09:41:15,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942147979] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:41:15,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951396913] [2021-11-09 09:41:15,406 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:41:15,406 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:41:15,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:41:15,412 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:41:15,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-09 09:41:15,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:15,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-09 09:41:15,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:41:15,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-09 09:41:16,293 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 31 treesize of output 19 [2021-11-09 09:41:16,307 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 10 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:41:16,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951396913] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:41:16,308 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:41:16,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-11-09 09:41:16,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485505507] [2021-11-09 09:41:16,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-09 09:41:16,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:41:16,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-09 09:41:16,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-11-09 09:41:16,310 INFO L87 Difference]: Start difference. First operand 125 states and 138 transitions. Second operand has 27 states, 27 states have (on average 3.8518518518518516) internal successors, (104), 27 states have internal predecessors, (104), 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) [2021-11-09 09:41:17,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:41:17,466 INFO L93 Difference]: Finished difference Result 199 states and 218 transitions. [2021-11-09 09:41:17,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-09 09:41:17,468 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.8518518518518516) internal successors, (104), 27 states have internal predecessors, (104), 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 55 [2021-11-09 09:41:17,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:41:17,470 INFO L225 Difference]: With dead ends: 199 [2021-11-09 09:41:17,470 INFO L226 Difference]: Without dead ends: 189 [2021-11-09 09:41:17,471 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=307, Invalid=2143, Unknown=0, NotChecked=0, Total=2450 [2021-11-09 09:41:17,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-11-09 09:41:17,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 131. [2021-11-09 09:41:17,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.1076923076923078) internal successors, (144), 130 states have internal predecessors, (144), 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) [2021-11-09 09:41:17,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 144 transitions. [2021-11-09 09:41:17,486 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 144 transitions. Word has length 55 [2021-11-09 09:41:17,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:41:17,486 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 144 transitions. [2021-11-09 09:41:17,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.8518518518518516) internal successors, (104), 27 states have internal predecessors, (104), 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) [2021-11-09 09:41:17,487 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 144 transitions. [2021-11-09 09:41:17,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-09 09:41:17,487 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:41:17,487 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:41:17,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-09 09:41:17,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-09 09:41:17,703 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:41:17,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:41:17,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1012702775, now seen corresponding path program 5 times [2021-11-09 09:41:17,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:41:17,703 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572450124] [2021-11-09 09:41:17,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:41:17,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:41:17,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:17,877 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:41:17,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:41:17,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572450124] [2021-11-09 09:41:17,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572450124] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:41:17,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400046749] [2021-11-09 09:41:17,878 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:41:17,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:41:17,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:41:17,891 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:41:17,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-09 09:41:18,325 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-09 09:41:18,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:41:18,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-09 09:41:18,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:41:18,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-09 09:41:18,468 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-09 09:41:18,468 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 26 treesize of output 25 [2021-11-09 09:41:18,532 INFO L354 Elim1Store]: treesize reduction 88, result has 20.0 percent of original size [2021-11-09 09:41:18,532 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 38 treesize of output 40 [2021-11-09 09:41:18,729 INFO L354 Elim1Store]: treesize reduction 162, result has 17.3 percent of original size [2021-11-09 09:41:18,730 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 6 case distinctions, treesize of input 55 treesize of output 60 [2021-11-09 09:41:18,851 INFO L354 Elim1Store]: treesize reduction 254, result has 15.3 percent of original size [2021-11-09 09:41:18,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 67 treesize of output 75 [2021-11-09 09:41:23,086 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-09 09:41:23,086 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:41:23,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-11-09 09:41:23,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679216218] [2021-11-09 09:41:23,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-09 09:41:23,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:41:23,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-09 09:41:23,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=492, Unknown=2, NotChecked=0, Total=552 [2021-11-09 09:41:23,089 INFO L87 Difference]: Start difference. First operand 131 states and 144 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:41:24,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:41:24,192 INFO L93 Difference]: Finished difference Result 206 states and 224 transitions. [2021-11-09 09:41:24,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-09 09:41:24,193 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-09 09:41:24,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:41:24,194 INFO L225 Difference]: With dead ends: 206 [2021-11-09 09:41:24,194 INFO L226 Difference]: Without dead ends: 204 [2021-11-09 09:41:24,195 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=269, Invalid=2485, Unknown=2, NotChecked=0, Total=2756 [2021-11-09 09:41:24,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-11-09 09:41:24,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 143. [2021-11-09 09:41:24,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.1056338028169015) internal successors, (157), 142 states have internal predecessors, (157), 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) [2021-11-09 09:41:24,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 157 transitions. [2021-11-09 09:41:24,208 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 157 transitions. Word has length 55 [2021-11-09 09:41:24,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:41:24,209 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 157 transitions. [2021-11-09 09:41:24,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:41:24,209 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 157 transitions. [2021-11-09 09:41:24,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-09 09:41:24,210 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:41:24,210 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:41:24,220 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-11-09 09:41:24,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:41:24,416 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:41:24,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:41:24,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1404832086, now seen corresponding path program 8 times [2021-11-09 09:41:24,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:41:24,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456645604] [2021-11-09 09:41:24,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:41:24,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:41:24,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:24,905 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 83 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:41:24,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:41:24,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456645604] [2021-11-09 09:41:24,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456645604] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:41:24,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227404147] [2021-11-09 09:41:24,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:41:24,907 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:41:24,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:41:24,908 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:41:24,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-09 09:41:25,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:41:25,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:41:25,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-09 09:41:25,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:41:26,214 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 114 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:41:26,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227404147] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:41:26,215 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:41:26,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2021-11-09 09:41:26,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393799570] [2021-11-09 09:41:26,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-09 09:41:26,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:41:26,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-09 09:41:26,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=610, Unknown=0, NotChecked=0, Total=812 [2021-11-09 09:41:26,218 INFO L87 Difference]: Start difference. First operand 143 states and 157 transitions. Second operand has 29 states, 29 states have (on average 3.9655172413793105) internal successors, (115), 29 states have internal predecessors, (115), 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) [2021-11-09 09:41:26,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:41:26,623 INFO L93 Difference]: Finished difference Result 272 states and 298 transitions. [2021-11-09 09:41:26,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-09 09:41:26,624 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.9655172413793105) internal successors, (115), 29 states have internal predecessors, (115), 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 61 [2021-11-09 09:41:26,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:41:26,624 INFO L225 Difference]: With dead ends: 272 [2021-11-09 09:41:26,624 INFO L226 Difference]: Without dead ends: 164 [2021-11-09 09:41:26,627 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=321, Invalid=939, Unknown=0, NotChecked=0, Total=1260 [2021-11-09 09:41:26,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-11-09 09:41:26,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 155. [2021-11-09 09:41:26,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.0974025974025974) internal successors, (169), 154 states have internal predecessors, (169), 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) [2021-11-09 09:41:26,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 169 transitions. [2021-11-09 09:41:26,640 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 169 transitions. Word has length 61 [2021-11-09 09:41:26,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:41:26,640 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 169 transitions. [2021-11-09 09:41:26,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.9655172413793105) internal successors, (115), 29 states have internal predecessors, (115), 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) [2021-11-09 09:41:26,640 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 169 transitions. [2021-11-09 09:41:26,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-09 09:41:26,641 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:41:26,641 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:41:26,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-09 09:41:26,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-09 09:41:26,855 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:41:26,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:41:26,855 INFO L85 PathProgramCache]: Analyzing trace with hash 337347535, now seen corresponding path program 9 times [2021-11-09 09:41:26,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:41:26,855 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152612049] [2021-11-09 09:41:26,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:41:26,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:41:26,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:27,213 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 12 proven. 130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:41:27,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:41:27,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152612049] [2021-11-09 09:41:27,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152612049] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:41:27,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170689889] [2021-11-09 09:41:27,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:41:27,214 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:41:27,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:41:27,219 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:41:27,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-09 09:41:27,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-09 09:41:27,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:41:27,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-09 09:41:27,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:41:28,038 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 20 treesize of output 16 [2021-11-09 09:41:28,087 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-09 09:41:28,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-09 09:41:28,986 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 12 proven. 130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:41:28,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170689889] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:41:28,986 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:41:28,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 32 [2021-11-09 09:41:28,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574067382] [2021-11-09 09:41:28,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-09 09:41:28,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:41:28,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-09 09:41:28,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-11-09 09:41:28,988 INFO L87 Difference]: Start difference. First operand 155 states and 169 transitions. Second operand has 32 states, 32 states have (on average 3.71875) internal successors, (119), 32 states have internal predecessors, (119), 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) [2021-11-09 09:41:30,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:41:30,748 INFO L93 Difference]: Finished difference Result 238 states and 259 transitions. [2021-11-09 09:41:30,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-09 09:41:30,748 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.71875) internal successors, (119), 32 states have internal predecessors, (119), 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 65 [2021-11-09 09:41:30,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:41:30,750 INFO L225 Difference]: With dead ends: 238 [2021-11-09 09:41:30,750 INFO L226 Difference]: Without dead ends: 228 [2021-11-09 09:41:30,752 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=418, Invalid=3614, Unknown=0, NotChecked=0, Total=4032 [2021-11-09 09:41:30,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-11-09 09:41:30,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 161. [2021-11-09 09:41:30,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.09375) internal successors, (175), 160 states have internal predecessors, (175), 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) [2021-11-09 09:41:30,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 175 transitions. [2021-11-09 09:41:30,770 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 175 transitions. Word has length 65 [2021-11-09 09:41:30,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:41:30,770 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 175 transitions. [2021-11-09 09:41:30,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.71875) internal successors, (119), 32 states have internal predecessors, (119), 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) [2021-11-09 09:41:30,770 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 175 transitions. [2021-11-09 09:41:30,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-09 09:41:30,771 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:41:30,771 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:41:30,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-09 09:41:30,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-09 09:41:30,987 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:41:30,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:41:30,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1374834217, now seen corresponding path program 6 times [2021-11-09 09:41:30,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:41:30,987 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070758969] [2021-11-09 09:41:30,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:41:30,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:41:31,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:31,262 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 12 proven. 130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:41:31,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:41:31,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070758969] [2021-11-09 09:41:31,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070758969] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:41:31,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743238545] [2021-11-09 09:41:31,263 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:41:31,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:41:31,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:41:31,264 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:41:31,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-09 09:41:31,920 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-09 09:41:31,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:41:31,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-09 09:41:31,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:41:32,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-09 09:41:32,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:41:32,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-11-09 09:41:32,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:41:32,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:41:32,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:41:32,230 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 09:41:32,230 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 38 treesize of output 40 [2021-11-09 09:41:32,403 INFO L354 Elim1Store]: treesize reduction 162, result has 17.3 percent of original size [2021-11-09 09:41:32,404 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 6 case distinctions, treesize of input 55 treesize of output 60 [2021-11-09 09:41:32,544 INFO L354 Elim1Store]: treesize reduction 254, result has 15.3 percent of original size [2021-11-09 09:41:32,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 67 treesize of output 75 [2021-11-09 09:41:32,813 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-09 09:41:32,815 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:41:32,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-11-09 09:41:32,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130637648] [2021-11-09 09:41:32,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-09 09:41:32,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:41:32,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-09 09:41:32,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2021-11-09 09:41:32,818 INFO L87 Difference]: Start difference. First operand 161 states and 175 transitions. Second operand has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 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) [2021-11-09 09:41:33,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:41:33,852 INFO L93 Difference]: Finished difference Result 250 states and 272 transitions. [2021-11-09 09:41:33,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-09 09:41:33,853 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 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 65 [2021-11-09 09:41:33,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:41:33,854 INFO L225 Difference]: With dead ends: 250 [2021-11-09 09:41:33,854 INFO L226 Difference]: Without dead ends: 240 [2021-11-09 09:41:33,855 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 720 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=260, Invalid=2710, Unknown=0, NotChecked=0, Total=2970 [2021-11-09 09:41:33,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-11-09 09:41:33,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 167. [2021-11-09 09:41:33,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.0963855421686748) internal successors, (182), 166 states have internal predecessors, (182), 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) [2021-11-09 09:41:33,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 182 transitions. [2021-11-09 09:41:33,873 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 182 transitions. Word has length 65 [2021-11-09 09:41:33,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:41:33,873 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 182 transitions. [2021-11-09 09:41:33,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 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) [2021-11-09 09:41:33,873 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 182 transitions. [2021-11-09 09:41:33,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-09 09:41:33,874 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:41:33,874 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:41:33,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-09 09:41:34,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-09 09:41:34,087 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:41:34,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:41:34,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1382106319, now seen corresponding path program 3 times [2021-11-09 09:41:34,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:41:34,088 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758654613] [2021-11-09 09:41:34,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:41:34,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:41:34,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:34,319 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:41:34,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:41:34,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758654613] [2021-11-09 09:41:34,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758654613] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:41:34,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073154794] [2021-11-09 09:41:34,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:41:34,319 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:41:34,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:41:34,326 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:41:34,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-09 09:41:34,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-09 09:41:34,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:41:34,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-09 09:41:34,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:41:35,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-09 09:41:35,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:41:35,122 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 29 treesize of output 28 [2021-11-09 09:41:35,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:41:35,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:41:35,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:41:35,269 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 09:41:35,269 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 33 treesize of output 35 [2021-11-09 09:41:35,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:41:35,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:41:35,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:41:35,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:41:35,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:41:35,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:41:35,346 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 09:41:35,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 50 [2021-11-09 09:41:35,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:41:35,653 INFO L354 Elim1Store]: treesize reduction 214, result has 16.1 percent of original size [2021-11-09 09:41:35,653 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 10 case distinctions, treesize of input 65 treesize of output 73 [2021-11-09 09:41:35,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:41:35,832 INFO L354 Elim1Store]: treesize reduction 319, result has 14.2 percent of original size [2021-11-09 09:41:35,833 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 15 case distinctions, treesize of input 77 treesize of output 88 [2021-11-09 09:41:36,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:41:36,742 INFO L354 Elim1Store]: treesize reduction 442, result has 12.8 percent of original size [2021-11-09 09:41:36,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 94 treesize of output 108 [2021-11-09 09:41:36,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:41:37,087 INFO L354 Elim1Store]: treesize reduction 583, result has 11.7 percent of original size [2021-11-09 09:41:37,087 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 28 case distinctions, treesize of input 106 treesize of output 123 [2021-11-09 09:41:46,539 INFO L354 Elim1Store]: treesize reduction 384, result has 0.3 percent of original size [2021-11-09 09:41:46,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 116 treesize of output 56 [2021-11-09 09:41:46,673 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-09 09:41:46,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073154794] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:41:46,674 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:41:46,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20] total 35 [2021-11-09 09:41:46,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389948819] [2021-11-09 09:41:46,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-09 09:41:46,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:41:46,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-09 09:41:46,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1074, Unknown=2, NotChecked=0, Total=1190 [2021-11-09 09:41:46,676 INFO L87 Difference]: Start difference. First operand 167 states and 182 transitions. Second operand has 35 states, 35 states have (on average 2.7714285714285714) internal successors, (97), 35 states have internal predecessors, (97), 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) [2021-11-09 09:42:16,760 WARN L207 SmtUtils]: Spent 5.10 s on a formula simplification. DAG size of input: 81 DAG size of output: 78 [2021-11-09 09:42:40,745 WARN L207 SmtUtils]: Spent 5.24 s on a formula simplification. DAG size of input: 78 DAG size of output: 75 [2021-11-09 09:42:53,711 WARN L207 SmtUtils]: Spent 5.46 s on a formula simplification. DAG size of input: 74 DAG size of output: 71 [2021-11-09 09:44:30,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:44:30,498 INFO L93 Difference]: Finished difference Result 277 states and 305 transitions. [2021-11-09 09:44:30,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-11-09 09:44:30,499 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.7714285714285714) internal successors, (97), 35 states have internal predecessors, (97), 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 65 [2021-11-09 09:44:30,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:44:30,501 INFO L225 Difference]: With dead ends: 277 [2021-11-09 09:44:30,501 INFO L226 Difference]: Without dead ends: 237 [2021-11-09 09:44:30,505 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2546 ImplicationChecksByTransitivity, 134.9s TimeCoverageRelationStatistics Valid=936, Invalid=7986, Unknown=8, NotChecked=0, Total=8930 [2021-11-09 09:44:30,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-11-09 09:44:30,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 173. [2021-11-09 09:44:30,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.0813953488372092) internal successors, (186), 172 states have internal predecessors, (186), 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) [2021-11-09 09:44:30,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 186 transitions. [2021-11-09 09:44:30,526 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 186 transitions. Word has length 65 [2021-11-09 09:44:30,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:44:30,527 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 186 transitions. [2021-11-09 09:44:30,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.7714285714285714) internal successors, (97), 35 states have internal predecessors, (97), 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) [2021-11-09 09:44:30,527 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 186 transitions. [2021-11-09 09:44:30,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-09 09:44:30,529 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:44:30,529 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:44:30,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-09 09:44:30,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-09 09:44:30,747 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:44:30,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:44:30,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1975375134, now seen corresponding path program 10 times [2021-11-09 09:44:30,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:44:30,747 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18117360] [2021-11-09 09:44:30,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:44:30,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:44:30,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:31,161 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 14 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:44:31,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:44:31,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18117360] [2021-11-09 09:44:31,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18117360] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:44:31,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661115538] [2021-11-09 09:44:31,162 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:44:31,162 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:44:31,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:44:31,163 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:44:31,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-09 09:44:31,892 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:44:31,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:44:31,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-09 09:44:31,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:44:32,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-09 09:44:32,705 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 31 treesize of output 19 [2021-11-09 09:44:32,719 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 14 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:44:32,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661115538] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:44:32,720 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:44:32,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 33 [2021-11-09 09:44:32,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434280155] [2021-11-09 09:44:32,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-09 09:44:32,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:44:32,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-09 09:44:32,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2021-11-09 09:44:32,723 INFO L87 Difference]: Start difference. First operand 173 states and 186 transitions. Second operand has 33 states, 33 states have (on average 4.121212121212121) internal successors, (136), 33 states have internal predecessors, (136), 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) [2021-11-09 09:44:35,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:44:35,561 INFO L93 Difference]: Finished difference Result 291 states and 311 transitions. [2021-11-09 09:44:35,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-09 09:44:35,561 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 4.121212121212121) internal successors, (136), 33 states have internal predecessors, (136), 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 71 [2021-11-09 09:44:35,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:44:35,563 INFO L225 Difference]: With dead ends: 291 [2021-11-09 09:44:35,564 INFO L226 Difference]: Without dead ends: 281 [2021-11-09 09:44:35,566 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1266 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=568, Invalid=4982, Unknown=0, NotChecked=0, Total=5550 [2021-11-09 09:44:35,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-11-09 09:44:35,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 179. [2021-11-09 09:44:35,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 1.0786516853932584) internal successors, (192), 178 states have internal predecessors, (192), 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) [2021-11-09 09:44:35,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 192 transitions. [2021-11-09 09:44:35,593 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 192 transitions. Word has length 71 [2021-11-09 09:44:35,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:44:35,593 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 192 transitions. [2021-11-09 09:44:35,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.121212121212121) internal successors, (136), 33 states have internal predecessors, (136), 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) [2021-11-09 09:44:35,594 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 192 transitions. [2021-11-09 09:44:35,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-09 09:44:35,595 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:44:35,595 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:44:35,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-09 09:44:35,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-09 09:44:35,811 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:44:35,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:44:35,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1821094634, now seen corresponding path program 7 times [2021-11-09 09:44:35,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:44:35,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051441878] [2021-11-09 09:44:35,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:44:35,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:44:35,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:36,138 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:44:36,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:44:36,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051441878] [2021-11-09 09:44:36,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051441878] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:44:36,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79372497] [2021-11-09 09:44:36,139 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:44:36,139 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:44:36,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:44:36,143 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:44:36,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-09 09:44:37,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:37,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-09 09:44:37,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:44:37,128 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 23 treesize of output 19 [2021-11-09 09:44:37,828 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-11-09 09:44:37,828 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 48 treesize of output 26 [2021-11-09 09:44:37,868 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:44:37,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79372497] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:44:37,868 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:44:37,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 25 [2021-11-09 09:44:37,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377697218] [2021-11-09 09:44:37,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-09 09:44:37,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:44:37,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-09 09:44:37,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-11-09 09:44:37,870 INFO L87 Difference]: Start difference. First operand 179 states and 192 transitions. Second operand has 25 states, 25 states have (on average 4.56) internal successors, (114), 25 states have internal predecessors, (114), 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) [2021-11-09 09:44:42,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:44:42,959 INFO L93 Difference]: Finished difference Result 535 states and 586 transitions. [2021-11-09 09:44:42,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2021-11-09 09:44:42,960 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.56) internal successors, (114), 25 states have internal predecessors, (114), 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 71 [2021-11-09 09:44:42,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:44:42,964 INFO L225 Difference]: With dead ends: 535 [2021-11-09 09:44:42,964 INFO L226 Difference]: Without dead ends: 533 [2021-11-09 09:44:42,971 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11483 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1986, Invalid=26744, Unknown=0, NotChecked=0, Total=28730 [2021-11-09 09:44:42,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-11-09 09:44:42,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 191. [2021-11-09 09:44:42,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.0789473684210527) internal successors, (205), 190 states have internal predecessors, (205), 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) [2021-11-09 09:44:42,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 205 transitions. [2021-11-09 09:44:42,997 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 205 transitions. Word has length 71 [2021-11-09 09:44:42,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:44:42,998 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 205 transitions. [2021-11-09 09:44:42,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.56) internal successors, (114), 25 states have internal predecessors, (114), 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) [2021-11-09 09:44:42,998 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 205 transitions. [2021-11-09 09:44:42,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-09 09:44:42,999 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:44:42,999 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:44:43,045 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-11-09 09:44:43,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:44:43,227 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:44:43,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:44:43,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1772484533, now seen corresponding path program 11 times [2021-11-09 09:44:43,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:44:43,227 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129860486] [2021-11-09 09:44:43,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:44:43,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:44:43,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:44,030 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 157 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:44:44,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:44:44,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129860486] [2021-11-09 09:44:44,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129860486] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:44:44,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920403782] [2021-11-09 09:44:44,031 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:44:44,031 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:44:44,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:44:44,033 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:44:44,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-09 09:44:45,073 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-11-09 09:44:45,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:44:45,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-09 09:44:45,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:44:46,597 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 200 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:44:46,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920403782] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:44:46,597 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:44:46,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 35 [2021-11-09 09:44:46,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858431756] [2021-11-09 09:44:46,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-09 09:44:46,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:44:46,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-09 09:44:46,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=903, Unknown=0, NotChecked=0, Total=1190 [2021-11-09 09:44:46,599 INFO L87 Difference]: Start difference. First operand 191 states and 205 transitions. Second operand has 35 states, 35 states have (on average 4.2) internal successors, (147), 35 states have internal predecessors, (147), 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) [2021-11-09 09:44:47,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:44:47,168 INFO L93 Difference]: Finished difference Result 356 states and 382 transitions. [2021-11-09 09:44:47,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-09 09:44:47,169 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 4.2) internal successors, (147), 35 states have internal predecessors, (147), 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 77 [2021-11-09 09:44:47,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:44:47,171 INFO L225 Difference]: With dead ends: 356 [2021-11-09 09:44:47,171 INFO L226 Difference]: Without dead ends: 212 [2021-11-09 09:44:47,172 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=439, Invalid=1367, Unknown=0, NotChecked=0, Total=1806 [2021-11-09 09:44:47,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-11-09 09:44:47,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 203. [2021-11-09 09:44:47,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 1.0742574257425743) internal successors, (217), 202 states have internal predecessors, (217), 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) [2021-11-09 09:44:47,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 217 transitions. [2021-11-09 09:44:47,203 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 217 transitions. Word has length 77 [2021-11-09 09:44:47,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:44:47,224 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 217 transitions. [2021-11-09 09:44:47,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 4.2) internal successors, (147), 35 states have internal predecessors, (147), 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) [2021-11-09 09:44:47,224 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 217 transitions. [2021-11-09 09:44:47,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-09 09:44:47,225 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:44:47,226 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:44:47,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-09 09:44:47,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:44:47,439 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:44:47,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:44:47,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1608818642, now seen corresponding path program 12 times [2021-11-09 09:44:47,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:44:47,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999500848] [2021-11-09 09:44:47,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:44:47,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:44:47,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:47,961 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 16 proven. 229 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:44:47,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:44:47,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999500848] [2021-11-09 09:44:47,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999500848] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:44:47,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450667751] [2021-11-09 09:44:47,962 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:44:47,962 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:44:47,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:44:47,963 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:44:47,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-09 09:44:49,176 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-11-09 09:44:49,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:44:49,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-09 09:44:49,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:44:49,510 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 20 treesize of output 16 [2021-11-09 09:44:49,566 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-09 09:44:49,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-09 09:44:50,940 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 16 proven. 229 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:44:50,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450667751] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:44:50,940 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:44:50,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 38 [2021-11-09 09:44:50,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106029345] [2021-11-09 09:44:50,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-09 09:44:50,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:44:50,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-09 09:44:50,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1292, Unknown=0, NotChecked=0, Total=1406 [2021-11-09 09:44:50,942 INFO L87 Difference]: Start difference. First operand 203 states and 217 transitions. Second operand has 38 states, 38 states have (on average 3.973684210526316) internal successors, (151), 38 states have internal predecessors, (151), 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) [2021-11-09 09:44:55,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:44:55,185 INFO L93 Difference]: Finished difference Result 341 states and 364 transitions. [2021-11-09 09:44:55,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-11-09 09:44:55,186 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.973684210526316) internal successors, (151), 38 states have internal predecessors, (151), 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 81 [2021-11-09 09:44:55,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:44:55,191 INFO L225 Difference]: With dead ends: 341 [2021-11-09 09:44:55,191 INFO L226 Difference]: Without dead ends: 331 [2021-11-09 09:44:55,193 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2137 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=753, Invalid=7803, Unknown=0, NotChecked=0, Total=8556 [2021-11-09 09:44:55,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-11-09 09:44:55,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 209. [2021-11-09 09:44:55,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 1.0721153846153846) internal successors, (223), 208 states have internal predecessors, (223), 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) [2021-11-09 09:44:55,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 223 transitions. [2021-11-09 09:44:55,226 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 223 transitions. Word has length 81 [2021-11-09 09:44:55,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:44:55,226 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 223 transitions. [2021-11-09 09:44:55,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.973684210526316) internal successors, (151), 38 states have internal predecessors, (151), 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) [2021-11-09 09:44:55,227 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 223 transitions. [2021-11-09 09:44:55,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-09 09:44:55,228 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:44:55,228 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:44:55,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-09 09:44:55,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-11-09 09:44:55,435 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:44:55,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:44:55,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1818791992, now seen corresponding path program 8 times [2021-11-09 09:44:55,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:44:55,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18693622] [2021-11-09 09:44:55,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:44:55,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:44:55,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:55,867 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 16 proven. 229 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:44:55,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:44:55,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18693622] [2021-11-09 09:44:55,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18693622] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:44:55,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398259097] [2021-11-09 09:44:55,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:44:55,869 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:44:55,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:44:55,875 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:44:55,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-09 09:44:56,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:44:56,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:44:56,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-09 09:44:56,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:44:57,084 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 20 treesize of output 16 [2021-11-09 09:44:57,125 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 0 case distinctions, treesize of input 43 treesize of output 38 [2021-11-09 09:44:57,154 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-11-09 09:44:57,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 63 treesize of output 67 [2021-11-09 09:44:57,303 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-09 09:44:57,303 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:44:57,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-11-09 09:44:57,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339212854] [2021-11-09 09:44:57,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-09 09:44:57,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:44:57,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-09 09:44:57,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2021-11-09 09:44:57,307 INFO L87 Difference]: Start difference. First operand 209 states and 223 transitions. Second operand has 20 states, 20 states have (on average 4.05) internal successors, (81), 20 states have internal predecessors, (81), 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) [2021-11-09 09:44:59,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:44:59,155 INFO L93 Difference]: Finished difference Result 303 states and 326 transitions. [2021-11-09 09:44:59,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-09 09:44:59,156 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.05) internal successors, (81), 20 states have internal predecessors, (81), 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 81 [2021-11-09 09:44:59,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:44:59,157 INFO L225 Difference]: With dead ends: 303 [2021-11-09 09:44:59,157 INFO L226 Difference]: Without dead ends: 293 [2021-11-09 09:44:59,158 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 842 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=323, Invalid=3217, Unknown=0, NotChecked=0, Total=3540 [2021-11-09 09:44:59,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-11-09 09:44:59,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 215. [2021-11-09 09:44:59,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.074766355140187) internal successors, (230), 214 states have internal predecessors, (230), 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) [2021-11-09 09:44:59,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 230 transitions. [2021-11-09 09:44:59,196 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 230 transitions. Word has length 81 [2021-11-09 09:44:59,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:44:59,197 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 230 transitions. [2021-11-09 09:44:59,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.05) internal successors, (81), 20 states have internal predecessors, (81), 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) [2021-11-09 09:44:59,197 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 230 transitions. [2021-11-09 09:44:59,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-09 09:44:59,199 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:44:59,199 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:44:59,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-09 09:44:59,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:44:59,415 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:44:59,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:44:59,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1148883672, now seen corresponding path program 4 times [2021-11-09 09:44:59,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:44:59,415 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660477989] [2021-11-09 09:44:59,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:44:59,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:44:59,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:59,891 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:44:59,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:44:59,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660477989] [2021-11-09 09:44:59,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660477989] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:44:59,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948287339] [2021-11-09 09:44:59,892 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:44:59,892 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:44:59,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:44:59,895 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:44:59,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-09 09:45:01,148 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:45:01,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:45:01,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-09 09:45:01,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:45:01,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-09 09:45:01,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 38 [2021-11-09 09:45:01,333 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-11-09 09:45:01,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 59 treesize of output 63 [2021-11-09 09:45:01,442 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-09 09:45:01,442 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:45:01,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-11-09 09:45:01,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519412608] [2021-11-09 09:45:01,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-09 09:45:01,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:45:01,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-09 09:45:01,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2021-11-09 09:45:01,444 INFO L87 Difference]: Start difference. First operand 215 states and 230 transitions. Second operand has 20 states, 20 states have (on average 4.05) internal successors, (81), 20 states have internal predecessors, (81), 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) [2021-11-09 09:45:03,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:45:03,511 INFO L93 Difference]: Finished difference Result 300 states and 322 transitions. [2021-11-09 09:45:03,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-11-09 09:45:03,511 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.05) internal successors, (81), 20 states have internal predecessors, (81), 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 81 [2021-11-09 09:45:03,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:45:03,513 INFO L225 Difference]: With dead ends: 300 [2021-11-09 09:45:03,513 INFO L226 Difference]: Without dead ends: 298 [2021-11-09 09:45:03,514 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=402, Invalid=4154, Unknown=0, NotChecked=0, Total=4556 [2021-11-09 09:45:03,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-11-09 09:45:03,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 221. [2021-11-09 09:45:03,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 1.0772727272727274) internal successors, (237), 220 states have internal predecessors, (237), 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) [2021-11-09 09:45:03,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 237 transitions. [2021-11-09 09:45:03,552 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 237 transitions. Word has length 81 [2021-11-09 09:45:03,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:45:03,552 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 237 transitions. [2021-11-09 09:45:03,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.05) internal successors, (81), 20 states have internal predecessors, (81), 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) [2021-11-09 09:45:03,553 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 237 transitions. [2021-11-09 09:45:03,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-09 09:45:03,554 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:45:03,554 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:45:03,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-09 09:45:03,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:45:03,783 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:45:03,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:45:03,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1465713665, now seen corresponding path program 13 times [2021-11-09 09:45:03,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:45:03,783 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601011180] [2021-11-09 09:45:03,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:45:03,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:45:03,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:45:04,276 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 18 proven. 279 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:45:04,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:45:04,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601011180] [2021-11-09 09:45:04,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601011180] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:45:04,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521406654] [2021-11-09 09:45:04,276 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:45:04,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:45:04,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:45:04,278 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:45:04,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-09 09:45:05,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:45:05,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-09 09:45:05,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:45:05,588 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 17 treesize of output 13 [2021-11-09 09:45:06,360 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 31 treesize of output 19 [2021-11-09 09:45:06,374 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 18 proven. 279 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:45:06,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521406654] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:45:06,374 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:45:06,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 39 [2021-11-09 09:45:06,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805292112] [2021-11-09 09:45:06,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-09 09:45:06,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:45:06,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-09 09:45:06,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2021-11-09 09:45:06,376 INFO L87 Difference]: Start difference. First operand 221 states and 237 transitions. Second operand has 39 states, 39 states have (on average 4.3076923076923075) internal successors, (168), 39 states have internal predecessors, (168), 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) [2021-11-09 09:45:09,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:45:09,841 INFO L93 Difference]: Finished difference Result 362 states and 386 transitions. [2021-11-09 09:45:09,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-11-09 09:45:09,842 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.3076923076923075) internal successors, (168), 39 states have internal predecessors, (168), 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 87 [2021-11-09 09:45:09,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:45:09,844 INFO L225 Difference]: With dead ends: 362 [2021-11-09 09:45:09,844 INFO L226 Difference]: Without dead ends: 352 [2021-11-09 09:45:09,846 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2054 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=742, Invalid=8000, Unknown=0, NotChecked=0, Total=8742 [2021-11-09 09:45:09,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-11-09 09:45:09,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 227. [2021-11-09 09:45:09,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 1.075221238938053) internal successors, (243), 226 states have internal predecessors, (243), 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) [2021-11-09 09:45:09,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 243 transitions. [2021-11-09 09:45:09,882 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 243 transitions. Word has length 87 [2021-11-09 09:45:09,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:45:09,882 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 243 transitions. [2021-11-09 09:45:09,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 4.3076923076923075) internal successors, (168), 39 states have internal predecessors, (168), 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) [2021-11-09 09:45:09,883 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 243 transitions. [2021-11-09 09:45:09,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-09 09:45:09,884 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:45:09,884 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:45:09,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-09 09:45:10,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-09 09:45:10,095 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:45:10,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:45:10,095 INFO L85 PathProgramCache]: Analyzing trace with hash 839156875, now seen corresponding path program 9 times [2021-11-09 09:45:10,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:45:10,096 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171384472] [2021-11-09 09:45:10,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:45:10,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:45:10,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:45:10,512 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:45:10,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:45:10,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171384472] [2021-11-09 09:45:10,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171384472] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:45:10,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943658081] [2021-11-09 09:45:10,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:45:10,513 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:45:10,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:45:10,515 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:45:10,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-09 09:45:11,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-09 09:45:11,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:45:11,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-09 09:45:11,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:45:11,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-09 09:45:12,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:45:12,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-11-09 09:45:12,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:45:12,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:45:12,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:45:12,140 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 09:45:12,140 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 38 treesize of output 40 [2021-11-09 09:45:12,339 INFO L354 Elim1Store]: treesize reduction 162, result has 17.3 percent of original size [2021-11-09 09:45:12,339 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 6 case distinctions, treesize of input 58 treesize of output 63 [2021-11-09 09:45:12,532 INFO L354 Elim1Store]: treesize reduction 254, result has 15.3 percent of original size [2021-11-09 09:45:12,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 70 treesize of output 78 [2021-11-09 09:45:12,939 INFO L354 Elim1Store]: treesize reduction 364, result has 13.7 percent of original size [2021-11-09 09:45:12,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 87 treesize of output 98 [2021-11-09 09:45:13,186 INFO L354 Elim1Store]: treesize reduction 492, result has 12.5 percent of original size [2021-11-09 09:45:13,187 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 21 case distinctions, treesize of input 99 treesize of output 113 [2021-11-09 09:45:13,834 INFO L354 Elim1Store]: treesize reduction 638, result has 11.4 percent of original size [2021-11-09 09:45:13,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 131 treesize of output 130 [2021-11-09 09:45:14,276 INFO L354 Elim1Store]: treesize reduction 802, result has 10.5 percent of original size [2021-11-09 09:45:14,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 143 treesize of output 145 [2021-11-09 09:45:15,440 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-09 09:45:15,440 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:45:15,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-11-09 09:45:15,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831203514] [2021-11-09 09:45:15,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 09:45:15,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:45:15,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 09:45:15,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1139, Unknown=0, NotChecked=0, Total=1260 [2021-11-09 09:45:15,443 INFO L87 Difference]: Start difference. First operand 227 states and 243 transitions. Second operand has 21 states, 21 states have (on average 4.142857142857143) internal successors, (87), 21 states have internal predecessors, (87), 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) [2021-11-09 09:45:17,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:45:17,830 INFO L93 Difference]: Finished difference Result 321 states and 344 transitions. [2021-11-09 09:45:17,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-11-09 09:45:17,830 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.142857142857143) internal successors, (87), 21 states have internal predecessors, (87), 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 87 [2021-11-09 09:45:17,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:45:17,832 INFO L225 Difference]: With dead ends: 321 [2021-11-09 09:45:17,832 INFO L226 Difference]: Without dead ends: 319 [2021-11-09 09:45:17,833 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2322 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=538, Invalid=7472, Unknown=0, NotChecked=0, Total=8010 [2021-11-09 09:45:17,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-11-09 09:45:17,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 239. [2021-11-09 09:45:17,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 1.0756302521008403) internal successors, (256), 238 states have internal predecessors, (256), 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) [2021-11-09 09:45:17,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 256 transitions. [2021-11-09 09:45:17,876 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 256 transitions. Word has length 87 [2021-11-09 09:45:17,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:45:17,877 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 256 transitions. [2021-11-09 09:45:17,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.142857142857143) internal successors, (87), 21 states have internal predecessors, (87), 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) [2021-11-09 09:45:17,877 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 256 transitions. [2021-11-09 09:45:17,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-09 09:45:17,879 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:45:17,879 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:45:17,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-09 09:45:18,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:45:18,103 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:45:18,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:45:18,103 INFO L85 PathProgramCache]: Analyzing trace with hash 190528916, now seen corresponding path program 14 times [2021-11-09 09:45:18,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:45:18,103 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823394535] [2021-11-09 09:45:18,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:45:18,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:45:18,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:45:18,924 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 255 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:45:18,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:45:18,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823394535] [2021-11-09 09:45:18,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823394535] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:45:18,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839316157] [2021-11-09 09:45:18,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:45:18,926 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:45:18,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:45:18,931 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:45:18,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-09 09:45:20,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:45:20,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:45:20,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-09 09:45:20,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:45:21,871 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 310 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:45:21,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839316157] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:45:21,872 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:45:21,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 41 [2021-11-09 09:45:21,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796613796] [2021-11-09 09:45:21,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-09 09:45:21,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:45:21,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-09 09:45:21,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=1253, Unknown=0, NotChecked=0, Total=1640 [2021-11-09 09:45:21,874 INFO L87 Difference]: Start difference. First operand 239 states and 256 transitions. Second operand has 41 states, 41 states have (on average 4.365853658536586) internal successors, (179), 41 states have internal predecessors, (179), 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) [2021-11-09 09:45:22,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:45:22,614 INFO L93 Difference]: Finished difference Result 440 states and 472 transitions. [2021-11-09 09:45:22,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-09 09:45:22,615 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 4.365853658536586) internal successors, (179), 41 states have internal predecessors, (179), 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 93 [2021-11-09 09:45:22,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:45:22,617 INFO L225 Difference]: With dead ends: 440 [2021-11-09 09:45:22,617 INFO L226 Difference]: Without dead ends: 260 [2021-11-09 09:45:22,618 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=576, Invalid=1874, Unknown=0, NotChecked=0, Total=2450 [2021-11-09 09:45:22,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-11-09 09:45:22,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 251. [2021-11-09 09:45:22,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 1.072) internal successors, (268), 250 states have internal predecessors, (268), 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) [2021-11-09 09:45:22,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 268 transitions. [2021-11-09 09:45:22,659 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 268 transitions. Word has length 93 [2021-11-09 09:45:22,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:45:22,660 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 268 transitions. [2021-11-09 09:45:22,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 4.365853658536586) internal successors, (179), 41 states have internal predecessors, (179), 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) [2021-11-09 09:45:22,660 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 268 transitions. [2021-11-09 09:45:22,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-09 09:45:22,661 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:45:22,661 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:45:22,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-09 09:45:22,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:45:22,875 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:45:22,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:45:22,875 INFO L85 PathProgramCache]: Analyzing trace with hash -632646643, now seen corresponding path program 15 times [2021-11-09 09:45:22,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:45:22,875 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364738961] [2021-11-09 09:45:22,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:45:22,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:45:22,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:45:23,513 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 20 proven. 356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:45:23,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:45:23,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364738961] [2021-11-09 09:45:23,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364738961] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:45:23,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319794916] [2021-11-09 09:45:23,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:45:23,514 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:45:23,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:45:23,515 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:45:23,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-09 09:45:25,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-09 09:45:25,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:45:25,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-09 09:45:25,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:45:25,630 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 20 treesize of output 16 [2021-11-09 09:45:25,689 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-09 09:45:25,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-09 09:45:27,261 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 20 proven. 356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:45:27,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319794916] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:45:27,262 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:45:27,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 44 [2021-11-09 09:45:27,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870252148] [2021-11-09 09:45:27,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-09 09:45:27,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:45:27,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-09 09:45:27,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1759, Unknown=0, NotChecked=0, Total=1892 [2021-11-09 09:45:27,264 INFO L87 Difference]: Start difference. First operand 251 states and 268 transitions. Second operand has 44 states, 44 states have (on average 4.159090909090909) internal successors, (183), 44 states have internal predecessors, (183), 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) [2021-11-09 09:45:32,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:45:32,748 INFO L93 Difference]: Finished difference Result 417 states and 445 transitions. [2021-11-09 09:45:32,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-11-09 09:45:32,748 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 4.159090909090909) internal successors, (183), 44 states have internal predecessors, (183), 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 97 [2021-11-09 09:45:32,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:45:32,751 INFO L225 Difference]: With dead ends: 417 [2021-11-09 09:45:32,751 INFO L226 Difference]: Without dead ends: 407 [2021-11-09 09:45:32,753 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3386 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=965, Invalid=11917, Unknown=0, NotChecked=0, Total=12882 [2021-11-09 09:45:32,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-11-09 09:45:32,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 257. [2021-11-09 09:45:32,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 1.0703125) internal successors, (274), 256 states have internal predecessors, (274), 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) [2021-11-09 09:45:32,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 274 transitions. [2021-11-09 09:45:32,799 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 274 transitions. Word has length 97 [2021-11-09 09:45:32,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:45:32,800 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 274 transitions. [2021-11-09 09:45:32,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 4.159090909090909) internal successors, (183), 44 states have internal predecessors, (183), 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) [2021-11-09 09:45:32,800 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 274 transitions. [2021-11-09 09:45:32,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-09 09:45:32,801 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:45:32,802 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:45:32,849 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-11-09 09:45:33,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-09 09:45:33,015 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:45:33,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:45:33,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1333628697, now seen corresponding path program 10 times [2021-11-09 09:45:33,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:45:33,015 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107872342] [2021-11-09 09:45:33,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:45:33,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:45:33,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:45:33,611 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 20 proven. 356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:45:33,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:45:33,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107872342] [2021-11-09 09:45:33,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107872342] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:45:33,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446237311] [2021-11-09 09:45:33,612 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:45:33,612 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:45:33,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:45:33,615 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:45:33,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-09 09:45:35,036 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:45:35,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:45:35,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-09 09:45:35,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:45:35,255 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 20 treesize of output 16 [2021-11-09 09:45:35,279 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 0 case distinctions, treesize of input 43 treesize of output 38 [2021-11-09 09:45:35,295 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-11-09 09:45:35,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 63 treesize of output 67 [2021-11-09 09:45:35,409 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-09 09:45:35,409 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:45:35,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-11-09 09:45:35,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619865999] [2021-11-09 09:45:35,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-09 09:45:35,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:45:35,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-09 09:45:35,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=502, Unknown=0, NotChecked=0, Total=552 [2021-11-09 09:45:35,411 INFO L87 Difference]: Start difference. First operand 257 states and 274 transitions. Second operand has 23 states, 23 states have (on average 4.217391304347826) internal successors, (97), 23 states have internal predecessors, (97), 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) [2021-11-09 09:45:37,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:45:37,798 INFO L93 Difference]: Finished difference Result 365 states and 392 transitions. [2021-11-09 09:45:37,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-11-09 09:45:37,799 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.217391304347826) internal successors, (97), 23 states have internal predecessors, (97), 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 97 [2021-11-09 09:45:37,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:45:37,801 INFO L225 Difference]: With dead ends: 365 [2021-11-09 09:45:37,801 INFO L226 Difference]: Without dead ends: 355 [2021-11-09 09:45:37,801 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1301 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=416, Invalid=4840, Unknown=0, NotChecked=0, Total=5256 [2021-11-09 09:45:37,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-11-09 09:45:37,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 263. [2021-11-09 09:45:37,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 1.0725190839694656) internal successors, (281), 262 states have internal predecessors, (281), 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) [2021-11-09 09:45:37,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 281 transitions. [2021-11-09 09:45:37,856 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 281 transitions. Word has length 97 [2021-11-09 09:45:37,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:45:37,857 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 281 transitions. [2021-11-09 09:45:37,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.217391304347826) internal successors, (97), 23 states have internal predecessors, (97), 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) [2021-11-09 09:45:37,857 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 281 transitions. [2021-11-09 09:45:37,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-09 09:45:37,859 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:45:37,859 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 7, 6, 6, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:45:37,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-09 09:45:38,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:45:38,087 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:45:38,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:45:38,087 INFO L85 PathProgramCache]: Analyzing trace with hash 2028485191, now seen corresponding path program 5 times [2021-11-09 09:45:38,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:45:38,087 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327709904] [2021-11-09 09:45:38,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:45:38,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:45:38,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:45:38,576 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:45:38,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:45:38,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327709904] [2021-11-09 09:45:38,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327709904] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:45:38,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773585308] [2021-11-09 09:45:38,577 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:45:38,577 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:45:38,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:45:38,593 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:45:38,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-09 09:45:40,545 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-11-09 09:45:40,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:45:40,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-09 09:45:40,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:45:40,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-09 09:45:40,936 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-11-09 09:45:40,936 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 29 treesize of output 28 [2021-11-09 09:45:41,091 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-09 09:45:41,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2021-11-09 09:45:41,191 INFO L354 Elim1Store]: treesize reduction 147, result has 17.4 percent of original size [2021-11-09 09:45:41,192 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 6 case distinctions, treesize of input 50 treesize of output 55 [2021-11-09 09:45:45,057 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-09 09:45:45,057 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:45:45,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-11-09 09:45:45,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111306220] [2021-11-09 09:45:45,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-09 09:45:45,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:45:45,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-09 09:45:45,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1101, Unknown=1, NotChecked=0, Total=1190 [2021-11-09 09:45:45,060 INFO L87 Difference]: Start difference. First operand 263 states and 281 transitions. Second operand has 23 states, 23 states have (on average 4.217391304347826) internal successors, (97), 23 states have internal predecessors, (97), 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) [2021-11-09 09:45:48,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:45:48,083 INFO L93 Difference]: Finished difference Result 362 states and 388 transitions. [2021-11-09 09:45:48,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-11-09 09:45:48,084 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.217391304347826) internal successors, (97), 23 states have internal predecessors, (97), 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 97 [2021-11-09 09:45:48,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:45:48,086 INFO L225 Difference]: With dead ends: 362 [2021-11-09 09:45:48,087 INFO L226 Difference]: Without dead ends: 360 [2021-11-09 09:45:48,089 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2404 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=555, Invalid=8186, Unknown=1, NotChecked=0, Total=8742 [2021-11-09 09:45:48,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-11-09 09:45:48,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 269. [2021-11-09 09:45:48,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 1.0746268656716418) internal successors, (288), 268 states have internal predecessors, (288), 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) [2021-11-09 09:45:48,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 288 transitions. [2021-11-09 09:45:48,148 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 288 transitions. Word has length 97 [2021-11-09 09:45:48,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:45:48,149 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 288 transitions. [2021-11-09 09:45:48,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.217391304347826) internal successors, (97), 23 states have internal predecessors, (97), 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) [2021-11-09 09:45:48,149 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 288 transitions. [2021-11-09 09:45:48,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-09 09:45:48,151 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:45:48,151 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:45:48,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-09 09:45:48,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-09 09:45:48,363 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:45:48,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:45:48,363 INFO L85 PathProgramCache]: Analyzing trace with hash -458779488, now seen corresponding path program 16 times [2021-11-09 09:45:48,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:45:48,363 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066536847] [2021-11-09 09:45:48,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:45:48,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:45:48,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:45:49,025 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 22 proven. 418 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:45:49,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:45:49,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066536847] [2021-11-09 09:45:49,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066536847] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:45:49,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101860171] [2021-11-09 09:45:49,026 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:45:49,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:45:49,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:45:49,027 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:45:49,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-09 09:45:50,558 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:45:50,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:45:50,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-09 09:45:50,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:45:50,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-09 09:45:51,975 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 31 treesize of output 19 [2021-11-09 09:45:51,993 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 22 proven. 418 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:45:51,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101860171] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:45:51,993 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:45:51,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 45 [2021-11-09 09:45:51,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021462220] [2021-11-09 09:45:51,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-09 09:45:51,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:45:51,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-09 09:45:51,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1855, Unknown=0, NotChecked=0, Total=1980 [2021-11-09 09:45:51,996 INFO L87 Difference]: Start difference. First operand 269 states and 288 transitions. Second operand has 45 states, 45 states have (on average 4.444444444444445) internal successors, (200), 45 states have internal predecessors, (200), 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) [2021-11-09 09:45:58,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:45:58,146 INFO L93 Difference]: Finished difference Result 484 states and 512 transitions. [2021-11-09 09:45:58,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-11-09 09:45:58,147 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 4.444444444444445) internal successors, (200), 45 states have internal predecessors, (200), 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 103 [2021-11-09 09:45:58,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:45:58,149 INFO L225 Difference]: With dead ends: 484 [2021-11-09 09:45:58,149 INFO L226 Difference]: Without dead ends: 474 [2021-11-09 09:45:58,151 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4111 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1163, Invalid=14839, Unknown=0, NotChecked=0, Total=16002 [2021-11-09 09:45:58,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-11-09 09:45:58,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 275. [2021-11-09 09:45:58,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 1.072992700729927) internal successors, (294), 274 states have internal predecessors, (294), 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) [2021-11-09 09:45:58,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 294 transitions. [2021-11-09 09:45:58,201 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 294 transitions. Word has length 103 [2021-11-09 09:45:58,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:45:58,202 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 294 transitions. [2021-11-09 09:45:58,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 4.444444444444445) internal successors, (200), 45 states have internal predecessors, (200), 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) [2021-11-09 09:45:58,202 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 294 transitions. [2021-11-09 09:45:58,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-09 09:45:58,203 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:45:58,204 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:45:58,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-09 09:45:58,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-09 09:45:58,419 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:45:58,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:45:58,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1664947884, now seen corresponding path program 11 times [2021-11-09 09:45:58,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:45:58,419 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391760294] [2021-11-09 09:45:58,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:45:58,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:45:58,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:45:58,876 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 0 proven. 440 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:45:58,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:45:58,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391760294] [2021-11-09 09:45:58,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391760294] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:45:58,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223827207] [2021-11-09 09:45:58,877 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:45:58,877 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:45:58,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:45:58,881 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:45:58,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-09 09:46:00,705 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-11-09 09:46:00,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:46:00,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-09 09:46:00,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:46:00,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-09 09:46:01,041 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-09 09:46:01,041 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 26 treesize of output 25 [2021-11-09 09:46:01,115 INFO L354 Elim1Store]: treesize reduction 88, result has 20.0 percent of original size [2021-11-09 09:46:01,116 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 38 treesize of output 40 [2021-11-09 09:46:01,314 INFO L354 Elim1Store]: treesize reduction 162, result has 17.3 percent of original size [2021-11-09 09:46:01,314 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 6 case distinctions, treesize of input 58 treesize of output 63 [2021-11-09 09:46:01,477 INFO L354 Elim1Store]: treesize reduction 254, result has 15.3 percent of original size [2021-11-09 09:46:01,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 70 treesize of output 78 [2021-11-09 09:46:01,992 INFO L354 Elim1Store]: treesize reduction 364, result has 13.7 percent of original size [2021-11-09 09:46:01,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 93 treesize of output 95 [2021-11-09 09:46:02,315 INFO L354 Elim1Store]: treesize reduction 492, result has 12.5 percent of original size [2021-11-09 09:46:02,316 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 21 case distinctions, treesize of input 105 treesize of output 110 [2021-11-09 09:46:09,260 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-09 09:46:09,261 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:46:09,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-11-09 09:46:09,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200768099] [2021-11-09 09:46:09,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-09 09:46:09,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:46:09,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-09 09:46:09,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1378, Unknown=1, NotChecked=0, Total=1482 [2021-11-09 09:46:09,262 INFO L87 Difference]: Start difference. First operand 275 states and 294 transitions. Second operand has 24 states, 24 states have (on average 4.291666666666667) internal successors, (103), 24 states have internal predecessors, (103), 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) [2021-11-09 09:46:12,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:46:12,815 INFO L93 Difference]: Finished difference Result 383 states and 410 transitions. [2021-11-09 09:46:12,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-11-09 09:46:12,815 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.291666666666667) internal successors, (103), 24 states have internal predecessors, (103), 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 103 [2021-11-09 09:46:12,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:46:12,817 INFO L225 Difference]: With dead ends: 383 [2021-11-09 09:46:12,817 INFO L226 Difference]: Without dead ends: 381 [2021-11-09 09:46:12,820 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3149 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=629, Invalid=10290, Unknown=1, NotChecked=0, Total=10920 [2021-11-09 09:46:12,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-11-09 09:46:12,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 287. [2021-11-09 09:46:12,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 1.0734265734265733) internal successors, (307), 286 states have internal predecessors, (307), 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) [2021-11-09 09:46:12,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 307 transitions. [2021-11-09 09:46:12,865 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 307 transitions. Word has length 103 [2021-11-09 09:46:12,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:46:12,865 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 307 transitions. [2021-11-09 09:46:12,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.291666666666667) internal successors, (103), 24 states have internal predecessors, (103), 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) [2021-11-09 09:46:12,866 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 307 transitions. [2021-11-09 09:46:12,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-09 09:46:12,867 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:46:12,867 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:46:12,879 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-11-09 09:46:13,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:46:13,078 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:46:13,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:46:13,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1433967347, now seen corresponding path program 17 times [2021-11-09 09:46:13,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:46:13,080 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292861201] [2021-11-09 09:46:13,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:46:13,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:46:13,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:14,250 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 377 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:46:14,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:46:14,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292861201] [2021-11-09 09:46:14,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292861201] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:46:14,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583233678] [2021-11-09 09:46:14,251 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:46:14,251 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:46:14,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:46:14,252 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:46:14,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-09 09:46:16,106 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-11-09 09:46:16,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:46:16,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-09 09:46:16,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:46:18,239 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 444 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:46:18,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583233678] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:46:18,239 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:46:18,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 47 [2021-11-09 09:46:18,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574329299] [2021-11-09 09:46:18,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-09 09:46:18,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:46:18,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-09 09:46:18,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=502, Invalid=1660, Unknown=0, NotChecked=0, Total=2162 [2021-11-09 09:46:18,241 INFO L87 Difference]: Start difference. First operand 287 states and 307 transitions. Second operand has 47 states, 47 states have (on average 4.48936170212766) internal successors, (211), 47 states have internal predecessors, (211), 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) [2021-11-09 09:46:18,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:46:18,885 INFO L93 Difference]: Finished difference Result 524 states and 562 transitions. [2021-11-09 09:46:18,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-09 09:46:18,885 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 4.48936170212766) internal successors, (211), 47 states have internal predecessors, (211), 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 109 [2021-11-09 09:46:18,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:46:18,887 INFO L225 Difference]: With dead ends: 524 [2021-11-09 09:46:18,887 INFO L226 Difference]: Without dead ends: 308 [2021-11-09 09:46:18,888 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=732, Invalid=2460, Unknown=0, NotChecked=0, Total=3192 [2021-11-09 09:46:18,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-11-09 09:46:18,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 299. [2021-11-09 09:46:18,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 1.070469798657718) internal successors, (319), 298 states have internal predecessors, (319), 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) [2021-11-09 09:46:18,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 319 transitions. [2021-11-09 09:46:18,940 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 319 transitions. Word has length 109 [2021-11-09 09:46:18,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:46:18,941 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 319 transitions. [2021-11-09 09:46:18,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 4.48936170212766) internal successors, (211), 47 states have internal predecessors, (211), 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) [2021-11-09 09:46:18,941 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 319 transitions. [2021-11-09 09:46:18,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-09 09:46:18,942 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:46:18,943 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:46:18,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-09 09:46:19,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:46:19,154 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:46:19,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:46:19,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1757028500, now seen corresponding path program 18 times [2021-11-09 09:46:19,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:46:19,155 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670491494] [2021-11-09 09:46:19,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:46:19,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:46:19,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:20,200 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 24 proven. 511 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:46:20,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:46:20,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670491494] [2021-11-09 09:46:20,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670491494] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:46:20,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449840875] [2021-11-09 09:46:20,200 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:46:20,201 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:46:20,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:46:20,202 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:46:20,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-09 09:46:22,287 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-11-09 09:46:22,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:46:22,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-09 09:46:22,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:46:22,839 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 20 treesize of output 16 [2021-11-09 09:46:22,892 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-09 09:46:22,892 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 29 treesize of output 28 [2021-11-09 09:46:24,854 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 24 proven. 511 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:46:24,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449840875] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:46:24,855 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:46:24,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 51 [2021-11-09 09:46:24,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663015693] [2021-11-09 09:46:24,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-09 09:46:24,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:46:24,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-09 09:46:24,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=2413, Unknown=0, NotChecked=0, Total=2550 [2021-11-09 09:46:24,857 INFO L87 Difference]: Start difference. First operand 299 states and 319 transitions. Second operand has 51 states, 51 states have (on average 4.333333333333333) internal successors, (221), 51 states have internal predecessors, (221), 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) [2021-11-09 09:46:30,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:46:30,259 INFO L93 Difference]: Finished difference Result 406 states and 434 transitions. [2021-11-09 09:46:30,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-09 09:46:30,260 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 4.333333333333333) internal successors, (221), 51 states have internal predecessors, (221), 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 113 [2021-11-09 09:46:30,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:46:30,262 INFO L225 Difference]: With dead ends: 406 [2021-11-09 09:46:30,262 INFO L226 Difference]: Without dead ends: 396 [2021-11-09 09:46:30,263 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1918 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=616, Invalid=8504, Unknown=0, NotChecked=0, Total=9120 [2021-11-09 09:46:30,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-11-09 09:46:30,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 305. [2021-11-09 09:46:30,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 1.069078947368421) internal successors, (325), 304 states have internal predecessors, (325), 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) [2021-11-09 09:46:30,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 325 transitions. [2021-11-09 09:46:30,299 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 325 transitions. Word has length 113 [2021-11-09 09:46:30,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:46:30,300 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 325 transitions. [2021-11-09 09:46:30,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 4.333333333333333) internal successors, (221), 51 states have internal predecessors, (221), 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) [2021-11-09 09:46:30,300 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 325 transitions. [2021-11-09 09:46:30,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-09 09:46:30,301 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:46:30,302 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:46:30,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-09 09:46:30,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:46:30,507 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:46:30,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:46:30,507 INFO L85 PathProgramCache]: Analyzing trace with hash 2114711162, now seen corresponding path program 12 times [2021-11-09 09:46:30,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:46:30,507 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281377192] [2021-11-09 09:46:30,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:46:30,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:46:30,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:31,458 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 24 proven. 511 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:46:31,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:46:31,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281377192] [2021-11-09 09:46:31,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281377192] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:46:31,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966879194] [2021-11-09 09:46:31,459 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:46:31,459 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:46:31,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:46:31,460 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:46:31,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-09 09:46:33,914 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-11-09 09:46:33,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:46:33,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-09 09:46:33,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:46:34,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-09 09:46:34,340 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-09 09:46:34,340 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 26 treesize of output 25 [2021-11-09 09:46:34,361 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-09 09:46:34,362 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 29 treesize of output 28 [2021-11-09 09:46:34,448 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-09 09:46:34,448 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:46:34,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2021-11-09 09:46:34,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907680927] [2021-11-09 09:46:34,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-09 09:46:34,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:46:34,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-09 09:46:34,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1145, Unknown=0, NotChecked=0, Total=1260 [2021-11-09 09:46:34,450 INFO L87 Difference]: Start difference. First operand 305 states and 325 transitions. Second operand has 26 states, 26 states have (on average 4.346153846153846) internal successors, (113), 26 states have internal predecessors, (113), 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) [2021-11-09 09:46:36,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:46:36,378 INFO L93 Difference]: Finished difference Result 442 states and 476 transitions. [2021-11-09 09:46:36,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-09 09:46:36,379 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.346153846153846) internal successors, (113), 26 states have internal predecessors, (113), 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 113 [2021-11-09 09:46:36,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:46:36,381 INFO L225 Difference]: With dead ends: 442 [2021-11-09 09:46:36,381 INFO L226 Difference]: Without dead ends: 432 [2021-11-09 09:46:36,381 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=235, Invalid=2627, Unknown=0, NotChecked=0, Total=2862 [2021-11-09 09:46:36,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-11-09 09:46:36,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 311. [2021-11-09 09:46:36,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 1.070967741935484) internal successors, (332), 310 states have internal predecessors, (332), 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) [2021-11-09 09:46:36,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 332 transitions. [2021-11-09 09:46:36,421 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 332 transitions. Word has length 113 [2021-11-09 09:46:36,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:46:36,421 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 332 transitions. [2021-11-09 09:46:36,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.346153846153846) internal successors, (113), 26 states have internal predecessors, (113), 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) [2021-11-09 09:46:36,421 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 332 transitions. [2021-11-09 09:46:36,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-09 09:46:36,422 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:46:36,422 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 9, 7, 7, 7, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:46:36,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-09 09:46:36,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-11-09 09:46:36,623 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:46:36,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:46:36,624 INFO L85 PathProgramCache]: Analyzing trace with hash 338869990, now seen corresponding path program 6 times [2021-11-09 09:46:36,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:46:36,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953613671] [2021-11-09 09:46:36,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:46:36,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:46:36,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:37,399 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 186 proven. 325 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-09 09:46:37,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:46:37,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953613671] [2021-11-09 09:46:37,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953613671] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:46:37,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11007243] [2021-11-09 09:46:37,400 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:46:37,400 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:46:37,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:46:37,403 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:46:37,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-09 09:46:40,163 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-11-09 09:46:40,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:46:40,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-09 09:46:40,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:46:40,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-09 09:46:40,536 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-09 09:46:40,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-09 09:46:42,096 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 0 proven. 535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:46:42,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11007243] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:46:42,097 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:46:42,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 49 [2021-11-09 09:46:42,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148837814] [2021-11-09 09:46:42,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-09 09:46:42,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:46:42,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-09 09:46:42,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=2213, Unknown=0, NotChecked=0, Total=2352 [2021-11-09 09:46:42,098 INFO L87 Difference]: Start difference. First operand 311 states and 332 transitions. Second operand has 49 states, 49 states have (on average 4.3061224489795915) internal successors, (211), 49 states have internal predecessors, (211), 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) [2021-11-09 09:46:53,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:46:53,408 INFO L93 Difference]: Finished difference Result 635 states and 695 transitions. [2021-11-09 09:46:53,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2021-11-09 09:46:53,409 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 4.3061224489795915) internal successors, (211), 49 states have internal predecessors, (211), 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 113 [2021-11-09 09:46:53,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:46:53,411 INFO L225 Difference]: With dead ends: 635 [2021-11-09 09:46:53,412 INFO L226 Difference]: Without dead ends: 607 [2021-11-09 09:46:53,415 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9885 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=2303, Invalid=29203, Unknown=0, NotChecked=0, Total=31506 [2021-11-09 09:46:53,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-11-09 09:46:53,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 378. [2021-11-09 09:46:53,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 1.0716180371352786) internal successors, (404), 377 states have internal predecessors, (404), 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) [2021-11-09 09:46:53,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 404 transitions. [2021-11-09 09:46:53,486 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 404 transitions. Word has length 113 [2021-11-09 09:46:53,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:46:53,487 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 404 transitions. [2021-11-09 09:46:53,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 4.3061224489795915) internal successors, (211), 49 states have internal predecessors, (211), 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) [2021-11-09 09:46:53,487 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 404 transitions. [2021-11-09 09:46:53,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-09 09:46:53,489 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:46:53,489 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:46:53,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-09 09:46:53,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:46:53,709 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:46:53,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:46:53,709 INFO L85 PathProgramCache]: Analyzing trace with hash -835806017, now seen corresponding path program 19 times [2021-11-09 09:46:53,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:46:53,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511974504] [2021-11-09 09:46:53,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:46:53,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:46:53,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:54,568 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 26 proven. 585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:46:54,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:46:54,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511974504] [2021-11-09 09:46:54,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511974504] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:46:54,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277263808] [2021-11-09 09:46:54,569 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:46:54,569 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:46:54,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:46:54,570 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:46:54,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-09 09:46:56,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:56,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-09 09:46:56,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:46:56,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-09 09:46:58,218 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 31 treesize of output 19 [2021-11-09 09:46:58,235 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 26 proven. 585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:46:58,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277263808] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:46:58,236 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:46:58,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 26] total 51 [2021-11-09 09:46:58,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829530425] [2021-11-09 09:46:58,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-09 09:46:58,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:46:58,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-09 09:46:58,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=2409, Unknown=0, NotChecked=0, Total=2550 [2021-11-09 09:46:58,237 INFO L87 Difference]: Start difference. First operand 378 states and 404 transitions. Second operand has 51 states, 51 states have (on average 4.549019607843137) internal successors, (232), 51 states have internal predecessors, (232), 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) [2021-11-09 09:47:06,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:47:06,420 INFO L93 Difference]: Finished difference Result 643 states and 679 transitions. [2021-11-09 09:47:06,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-11-09 09:47:06,421 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 4.549019607843137) internal successors, (232), 51 states have internal predecessors, (232), 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 119 [2021-11-09 09:47:06,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:47:06,423 INFO L225 Difference]: With dead ends: 643 [2021-11-09 09:47:06,424 INFO L226 Difference]: Without dead ends: 633 [2021-11-09 09:47:06,426 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5861 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=1413, Invalid=20937, Unknown=0, NotChecked=0, Total=22350 [2021-11-09 09:47:06,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-11-09 09:47:06,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 384. [2021-11-09 09:47:06,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 1.0704960835509139) internal successors, (410), 383 states have internal predecessors, (410), 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) [2021-11-09 09:47:06,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 410 transitions. [2021-11-09 09:47:06,493 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 410 transitions. Word has length 119 [2021-11-09 09:47:06,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:47:06,493 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 410 transitions. [2021-11-09 09:47:06,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 4.549019607843137) internal successors, (232), 51 states have internal predecessors, (232), 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) [2021-11-09 09:47:06,494 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 410 transitions. [2021-11-09 09:47:06,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-09 09:47:06,496 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:47:06,496 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:47:06,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-09 09:47:06,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:47:06,697 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:47:06,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:47:06,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1787078989, now seen corresponding path program 13 times [2021-11-09 09:47:06,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:47:06,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956448169] [2021-11-09 09:47:06,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:47:06,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:47:06,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:47:07,401 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 0 proven. 611 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:47:07,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:47:07,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956448169] [2021-11-09 09:47:07,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956448169] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:47:07,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162097826] [2021-11-09 09:47:07,402 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:47:07,402 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:47:07,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:47:07,407 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:47:07,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-09 09:47:09,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:47:09,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-09 09:47:09,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:47:09,827 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 23 treesize of output 19 [2021-11-09 09:47:11,161 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-11-09 09:47:11,162 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 48 treesize of output 26 [2021-11-09 09:47:11,224 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 0 proven. 611 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:47:11,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162097826] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:47:11,224 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:47:11,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 40 [2021-11-09 09:47:11,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697318670] [2021-11-09 09:47:11,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-09 09:47:11,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:47:11,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-09 09:47:11,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1448, Unknown=0, NotChecked=0, Total=1560 [2021-11-09 09:47:11,226 INFO L87 Difference]: Start difference. First operand 384 states and 410 transitions. Second operand has 40 states, 40 states have (on average 4.95) internal successors, (198), 40 states have internal predecessors, (198), 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) [2021-11-09 09:47:31,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:47:31,820 INFO L93 Difference]: Finished difference Result 1381 states and 1502 transitions. [2021-11-09 09:47:31,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 465 states. [2021-11-09 09:47:31,821 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 4.95) internal successors, (198), 40 states have internal predecessors, (198), 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 119 [2021-11-09 09:47:31,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:47:31,829 INFO L225 Difference]: With dead ends: 1381 [2021-11-09 09:47:31,829 INFO L226 Difference]: Without dead ends: 1379 [2021-11-09 09:47:31,846 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 584 GetRequests, 104 SyntacticMatches, 3 SemanticMatches, 477 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102339 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=8181, Invalid=220781, Unknown=0, NotChecked=0, Total=228962 [2021-11-09 09:47:31,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1379 states. [2021-11-09 09:47:31,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1379 to 396. [2021-11-09 09:47:31,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 1.070886075949367) internal successors, (423), 395 states have internal predecessors, (423), 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) [2021-11-09 09:47:31,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 423 transitions. [2021-11-09 09:47:31,928 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 423 transitions. Word has length 119 [2021-11-09 09:47:31,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:47:31,929 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 423 transitions. [2021-11-09 09:47:31,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 4.95) internal successors, (198), 40 states have internal predecessors, (198), 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) [2021-11-09 09:47:31,930 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 423 transitions. [2021-11-09 09:47:31,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-09 09:47:31,931 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:47:31,931 INFO L513 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:47:31,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-09 09:47:32,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-11-09 09:47:32,159 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:47:32,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:47:32,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1467666386, now seen corresponding path program 20 times [2021-11-09 09:47:32,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:47:32,159 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182295548] [2021-11-09 09:47:32,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:47:32,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:47:32,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:47:33,290 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 523 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:47:33,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:47:33,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182295548] [2021-11-09 09:47:33,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182295548] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:47:33,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483838201] [2021-11-09 09:47:33,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:47:33,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:47:33,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:47:33,291 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:47:33,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-09 09:47:35,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:47:35,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:47:35,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-09 09:47:35,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:47:38,108 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 602 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:47:38,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483838201] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:47:38,109 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:47:38,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 53 [2021-11-09 09:47:38,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538157263] [2021-11-09 09:47:38,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-09 09:47:38,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:47:38,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-09 09:47:38,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=2124, Unknown=0, NotChecked=0, Total=2756 [2021-11-09 09:47:38,112 INFO L87 Difference]: Start difference. First operand 396 states and 423 transitions. Second operand has 53 states, 53 states have (on average 4.584905660377358) internal successors, (243), 53 states have internal predecessors, (243), 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) [2021-11-09 09:47:38,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:47:38,911 INFO L93 Difference]: Finished difference Result 620 states and 659 transitions. [2021-11-09 09:47:38,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-09 09:47:38,911 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 4.584905660377358) internal successors, (243), 53 states have internal predecessors, (243), 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 125 [2021-11-09 09:47:38,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:47:38,913 INFO L225 Difference]: With dead ends: 620 [2021-11-09 09:47:38,913 INFO L226 Difference]: Without dead ends: 362 [2021-11-09 09:47:38,915 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1158 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=907, Invalid=3125, Unknown=0, NotChecked=0, Total=4032 [2021-11-09 09:47:38,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-11-09 09:47:38,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 353. [2021-11-09 09:47:38,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 1.0625) internal successors, (374), 352 states have internal predecessors, (374), 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) [2021-11-09 09:47:38,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 374 transitions. [2021-11-09 09:47:38,977 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 374 transitions. Word has length 125 [2021-11-09 09:47:38,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:47:38,977 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 374 transitions. [2021-11-09 09:47:38,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 4.584905660377358) internal successors, (243), 53 states have internal predecessors, (243), 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) [2021-11-09 09:47:38,978 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 374 transitions. [2021-11-09 09:47:38,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-09 09:47:38,979 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:47:38,979 INFO L513 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:47:39,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-09 09:47:39,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-11-09 09:47:39,194 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:47:39,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:47:39,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1635122613, now seen corresponding path program 21 times [2021-11-09 09:47:39,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:47:39,195 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595658037] [2021-11-09 09:47:39,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:47:39,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:47:39,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:47:40,308 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 28 proven. 694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:47:40,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:47:40,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595658037] [2021-11-09 09:47:40,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595658037] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:47:40,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33614484] [2021-11-09 09:47:40,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:47:40,309 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:47:40,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:47:40,310 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:47:40,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-09 09:47:43,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-11-09 09:47:43,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:47:43,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-09 09:47:43,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:47:43,978 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 20 treesize of output 16 [2021-11-09 09:47:44,047 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-09 09:47:44,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-09 09:47:46,097 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 28 proven. 694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:47:46,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33614484] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:47:46,097 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:47:46,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 29] total 56 [2021-11-09 09:47:46,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370086980] [2021-11-09 09:47:46,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-09 09:47:46,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:47:46,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-09 09:47:46,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=2909, Unknown=0, NotChecked=0, Total=3080 [2021-11-09 09:47:46,098 INFO L87 Difference]: Start difference. First operand 353 states and 374 transitions. Second operand has 56 states, 56 states have (on average 4.410714285714286) internal successors, (247), 56 states have internal predecessors, (247), 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) [2021-11-09 09:47:55,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:47:55,427 INFO L93 Difference]: Finished difference Result 641 states and 677 transitions. [2021-11-09 09:47:55,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2021-11-09 09:47:55,428 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 4.410714285714286) internal successors, (247), 56 states have internal predecessors, (247), 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 129 [2021-11-09 09:47:55,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:47:55,430 INFO L225 Difference]: With dead ends: 641 [2021-11-09 09:47:55,430 INFO L226 Difference]: Without dead ends: 631 [2021-11-09 09:47:55,432 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9192 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=1789, Invalid=29011, Unknown=0, NotChecked=0, Total=30800 [2021-11-09 09:47:55,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-11-09 09:47:55,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 359. [2021-11-09 09:47:55,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 1.0614525139664805) internal successors, (380), 358 states have internal predecessors, (380), 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) [2021-11-09 09:47:55,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 380 transitions. [2021-11-09 09:47:55,471 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 380 transitions. Word has length 129 [2021-11-09 09:47:55,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:47:55,471 INFO L470 AbstractCegarLoop]: Abstraction has 359 states and 380 transitions. [2021-11-09 09:47:55,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 4.410714285714286) internal successors, (247), 56 states have internal predecessors, (247), 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) [2021-11-09 09:47:55,471 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 380 transitions. [2021-11-09 09:47:55,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-09 09:47:55,472 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:47:55,473 INFO L513 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:47:55,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-11-09 09:47:55,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-11-09 09:47:55,699 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:47:55,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:47:55,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1643310683, now seen corresponding path program 14 times [2021-11-09 09:47:55,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:47:55,699 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99178491] [2021-11-09 09:47:55,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:47:55,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:47:55,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:47:56,469 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 28 proven. 694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:47:56,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:47:56,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99178491] [2021-11-09 09:47:56,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99178491] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:47:56,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908618805] [2021-11-09 09:47:56,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:47:56,470 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:47:56,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:47:56,475 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:47:56,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-09 09:47:58,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:47:58,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:47:58,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-09 09:47:58,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:47:58,978 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 20 treesize of output 16 [2021-11-09 09:47:59,006 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 0 case distinctions, treesize of input 43 treesize of output 38 [2021-11-09 09:47:59,015 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-11-09 09:47:59,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 63 treesize of output 67 [2021-11-09 09:47:59,124 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-09 09:47:59,124 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:47:59,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2021-11-09 09:47:59,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657541463] [2021-11-09 09:47:59,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-09 09:47:59,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:47:59,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-09 09:47:59,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=808, Unknown=0, NotChecked=0, Total=870 [2021-11-09 09:47:59,125 INFO L87 Difference]: Start difference. First operand 359 states and 380 transitions. Second operand has 29 states, 29 states have (on average 4.448275862068965) internal successors, (129), 29 states have internal predecessors, (129), 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) [2021-11-09 09:48:02,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:48:02,410 INFO L93 Difference]: Finished difference Result 483 states and 515 transitions. [2021-11-09 09:48:02,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-11-09 09:48:02,410 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.448275862068965) internal successors, (129), 29 states have internal predecessors, (129), 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 129 [2021-11-09 09:48:02,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:48:02,412 INFO L225 Difference]: With dead ends: 483 [2021-11-09 09:48:02,412 INFO L226 Difference]: Without dead ends: 473 [2021-11-09 09:48:02,413 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2520 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=623, Invalid=9079, Unknown=0, NotChecked=0, Total=9702 [2021-11-09 09:48:02,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-11-09 09:48:02,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 359. [2021-11-09 09:48:02,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 1.0614525139664805) internal successors, (380), 358 states have internal predecessors, (380), 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) [2021-11-09 09:48:02,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 380 transitions. [2021-11-09 09:48:02,464 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 380 transitions. Word has length 129 [2021-11-09 09:48:02,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:48:02,464 INFO L470 AbstractCegarLoop]: Abstraction has 359 states and 380 transitions. [2021-11-09 09:48:02,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.448275862068965) internal successors, (129), 29 states have internal predecessors, (129), 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) [2021-11-09 09:48:02,465 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 380 transitions. [2021-11-09 09:48:02,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-09 09:48:02,466 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:48:02,466 INFO L513 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:48:02,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-11-09 09:48:02,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-11-09 09:48:02,675 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:48:02,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:48:02,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1352146625, now seen corresponding path program 7 times [2021-11-09 09:48:02,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:48:02,675 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168817351] [2021-11-09 09:48:02,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:48:02,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:48:02,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:48:03,423 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 226 proven. 472 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-09 09:48:03,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:48:03,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168817351] [2021-11-09 09:48:03,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168817351] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:48:03,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996181173] [2021-11-09 09:48:03,424 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:48:03,424 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:48:03,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:48:03,425 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:48:03,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-09 09:48:05,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:48:05,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-09 09:48:05,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:48:05,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-09 09:48:06,015 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-09 09:48:06,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-09 09:48:07,496 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:48:07,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996181173] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:48:07,497 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:48:07,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29] total 55 [2021-11-09 09:48:07,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515396439] [2021-11-09 09:48:07,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-09 09:48:07,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:48:07,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-09 09:48:07,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=2815, Unknown=0, NotChecked=0, Total=2970 [2021-11-09 09:48:07,499 INFO L87 Difference]: Start difference. First operand 359 states and 380 transitions. Second operand has 55 states, 55 states have (on average 4.4) internal successors, (242), 55 states have internal predecessors, (242), 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) [2021-11-09 09:48:20,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:48:20,942 INFO L93 Difference]: Finished difference Result 826 states and 897 transitions. [2021-11-09 09:48:20,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 183 states. [2021-11-09 09:48:20,942 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 4.4) internal successors, (242), 55 states have internal predecessors, (242), 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 129 [2021-11-09 09:48:20,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:48:20,945 INFO L225 Difference]: With dead ends: 826 [2021-11-09 09:48:20,945 INFO L226 Difference]: Without dead ends: 798 [2021-11-09 09:48:20,947 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 232 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18310 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=3485, Invalid=51037, Unknown=0, NotChecked=0, Total=54522 [2021-11-09 09:48:20,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2021-11-09 09:48:21,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 442. [2021-11-09 09:48:21,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 441 states have (on average 1.0657596371882085) internal successors, (470), 441 states have internal predecessors, (470), 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) [2021-11-09 09:48:21,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 470 transitions. [2021-11-09 09:48:21,010 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 470 transitions. Word has length 129 [2021-11-09 09:48:21,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:48:21,010 INFO L470 AbstractCegarLoop]: Abstraction has 442 states and 470 transitions. [2021-11-09 09:48:21,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 4.4) internal successors, (242), 55 states have internal predecessors, (242), 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) [2021-11-09 09:48:21,010 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 470 transitions. [2021-11-09 09:48:21,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-09 09:48:21,012 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:48:21,012 INFO L513 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:48:21,054 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-11-09 09:48:21,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:48:21,225 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:48:21,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:48:21,225 INFO L85 PathProgramCache]: Analyzing trace with hash -86057890, now seen corresponding path program 22 times [2021-11-09 09:48:21,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:48:21,225 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019276943] [2021-11-09 09:48:21,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:48:21,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:48:21,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:48:22,028 INFO L134 CoverageAnalysis]: Checked inductivity of 810 backedges. 30 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:48:22,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:48:22,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019276943] [2021-11-09 09:48:22,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019276943] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:48:22,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778278552] [2021-11-09 09:48:22,029 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:48:22,029 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:48:22,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:48:22,029 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:48:22,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-09 09:48:24,288 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:48:24,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:48:24,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-09 09:48:24,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:48:24,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-09 09:48:25,899 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 31 treesize of output 19 [2021-11-09 09:48:25,911 INFO L134 CoverageAnalysis]: Checked inductivity of 810 backedges. 30 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:48:25,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778278552] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:48:25,911 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:48:25,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 29] total 57 [2021-11-09 09:48:25,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25322769] [2021-11-09 09:48:25,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-11-09 09:48:25,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:48:25,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-11-09 09:48:25,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=3035, Unknown=0, NotChecked=0, Total=3192 [2021-11-09 09:48:25,914 INFO L87 Difference]: Start difference. First operand 442 states and 470 transitions. Second operand has 57 states, 57 states have (on average 4.631578947368421) internal successors, (264), 57 states have internal predecessors, (264), 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) [2021-11-09 09:48:35,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:48:35,506 INFO L93 Difference]: Finished difference Result 799 states and 838 transitions. [2021-11-09 09:48:35,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2021-11-09 09:48:35,506 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 4.631578947368421) internal successors, (264), 57 states have internal predecessors, (264), 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 135 [2021-11-09 09:48:35,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:48:35,509 INFO L225 Difference]: With dead ends: 799 [2021-11-09 09:48:35,509 INFO L226 Difference]: Without dead ends: 789 [2021-11-09 09:48:35,511 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10217 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=2024, Invalid=34266, Unknown=0, NotChecked=0, Total=36290 [2021-11-09 09:48:35,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2021-11-09 09:48:35,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 448. [2021-11-09 09:48:35,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 447 states have (on average 1.0648769574944073) internal successors, (476), 447 states have internal predecessors, (476), 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) [2021-11-09 09:48:35,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 476 transitions. [2021-11-09 09:48:35,573 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 476 transitions. Word has length 135 [2021-11-09 09:48:35,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:48:35,574 INFO L470 AbstractCegarLoop]: Abstraction has 448 states and 476 transitions. [2021-11-09 09:48:35,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 4.631578947368421) internal successors, (264), 57 states have internal predecessors, (264), 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) [2021-11-09 09:48:35,574 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 476 transitions. [2021-11-09 09:48:35,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-09 09:48:35,575 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:48:35,575 INFO L513 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:48:35,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-11-09 09:48:35,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:48:35,775 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:48:35,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:48:35,776 INFO L85 PathProgramCache]: Analyzing trace with hash 491420782, now seen corresponding path program 15 times [2021-11-09 09:48:35,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:48:35,776 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343502972] [2021-11-09 09:48:35,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:48:35,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:48:35,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:48:36,391 INFO L134 CoverageAnalysis]: Checked inductivity of 810 backedges. 0 proven. 810 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:48:36,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:48:36,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343502972] [2021-11-09 09:48:36,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343502972] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:48:36,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598039585] [2021-11-09 09:48:36,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:48:36,392 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:48:36,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:48:36,395 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:48:36,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-09 09:48:39,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-09 09:48:39,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:48:39,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-09 09:48:39,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:48:39,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-09 09:48:39,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:48:39,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-11-09 09:48:39,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:48:39,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:48:39,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:48:39,607 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 09:48:39,607 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 38 treesize of output 40 [2021-11-09 09:48:39,800 INFO L354 Elim1Store]: treesize reduction 162, result has 17.3 percent of original size [2021-11-09 09:48:39,800 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 6 case distinctions, treesize of input 58 treesize of output 63 [2021-11-09 09:48:39,938 INFO L354 Elim1Store]: treesize reduction 254, result has 15.3 percent of original size [2021-11-09 09:48:39,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 70 treesize of output 78 [2021-11-09 09:48:40,283 INFO L354 Elim1Store]: treesize reduction 364, result has 13.7 percent of original size [2021-11-09 09:48:40,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 87 treesize of output 98 [2021-11-09 09:48:40,509 INFO L354 Elim1Store]: treesize reduction 492, result has 12.5 percent of original size [2021-11-09 09:48:40,510 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 21 case distinctions, treesize of input 99 treesize of output 113 [2021-11-09 09:48:41,041 INFO L354 Elim1Store]: treesize reduction 638, result has 11.4 percent of original size [2021-11-09 09:48:41,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 116 treesize of output 133 [2021-11-09 09:48:41,366 INFO L354 Elim1Store]: treesize reduction 802, result has 10.5 percent of original size [2021-11-09 09:48:41,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 128 treesize of output 148 [2021-11-09 09:48:42,123 INFO L354 Elim1Store]: treesize reduction 984, result has 9.7 percent of original size [2021-11-09 09:48:42,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 45 case distinctions, treesize of input 145 treesize of output 168 [2021-11-09 09:48:42,615 INFO L354 Elim1Store]: treesize reduction 1184, result has 9.1 percent of original size [2021-11-09 09:48:42,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 55 case distinctions, treesize of input 157 treesize of output 183 [2021-11-09 09:48:43,755 INFO L354 Elim1Store]: treesize reduction 1402, result has 8.5 percent of original size [2021-11-09 09:48:43,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 66 case distinctions, treesize of input 174 treesize of output 203 [2021-11-09 09:48:44,556 INFO L354 Elim1Store]: treesize reduction 1638, result has 8.0 percent of original size [2021-11-09 09:48:44,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 78 case distinctions, treesize of input 186 treesize of output 218 [2021-11-09 09:48:48,505 INFO L354 Elim1Store]: treesize reduction 1892, result has 7.5 percent of original size [2021-11-09 09:48:48,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 91 case distinctions, treesize of input 245 treesize of output 235 [2021-11-09 09:48:53,245 INFO L354 Elim1Store]: treesize reduction 2164, result has 7.1 percent of original size [2021-11-09 09:48:53,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 105 case distinctions, treesize of input 257 treesize of output 250 [2021-11-09 09:48:54,218 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-09 09:48:54,218 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:48:54,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2021-11-09 09:48:54,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930648210] [2021-11-09 09:48:54,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-09 09:48:54,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:48:54,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-09 09:48:54,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=2612, Unknown=0, NotChecked=0, Total=2862 [2021-11-09 09:48:54,223 INFO L87 Difference]: Start difference. First operand 448 states and 476 transitions. Second operand has 30 states, 30 states have (on average 4.5) internal successors, (135), 30 states have internal predecessors, (135), 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) [2021-11-09 09:48:58,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:48:58,816 INFO L93 Difference]: Finished difference Result 578 states and 614 transitions. [2021-11-09 09:48:58,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-11-09 09:48:58,817 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.5) internal successors, (135), 30 states have internal predecessors, (135), 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 135 [2021-11-09 09:48:58,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:48:58,819 INFO L225 Difference]: With dead ends: 578 [2021-11-09 09:48:58,819 INFO L226 Difference]: Without dead ends: 576 [2021-11-09 09:48:58,824 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6333 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=1018, Invalid=19574, Unknown=0, NotChecked=0, Total=20592 [2021-11-09 09:48:58,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-11-09 09:48:58,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 460. [2021-11-09 09:48:58,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 1.065359477124183) internal successors, (489), 459 states have internal predecessors, (489), 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) [2021-11-09 09:48:58,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 489 transitions. [2021-11-09 09:48:58,911 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 489 transitions. Word has length 135 [2021-11-09 09:48:58,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:48:58,912 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 489 transitions. [2021-11-09 09:48:58,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.5) internal successors, (135), 30 states have internal predecessors, (135), 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) [2021-11-09 09:48:58,912 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 489 transitions. [2021-11-09 09:48:58,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-09 09:48:58,913 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:48:58,913 INFO L513 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:48:58,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-11-09 09:48:59,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-11-09 09:48:59,131 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:48:59,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:48:59,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1010918351, now seen corresponding path program 23 times [2021-11-09 09:48:59,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:48:59,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536234097] [2021-11-09 09:48:59,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:48:59,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:48:59,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:49:00,427 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 693 proven. 211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:49:00,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:49:00,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536234097] [2021-11-09 09:49:00,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536234097] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:49:00,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501430105] [2021-11-09 09:49:00,427 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:49:00,427 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:49:00,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:49:00,428 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:49:00,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-11-09 09:49:03,460 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-11-09 09:49:03,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:49:03,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-09 09:49:03,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:49:05,910 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 784 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:49:05,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501430105] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:49:05,910 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:49:05,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 59 [2021-11-09 09:49:05,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171348695] [2021-11-09 09:49:05,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-11-09 09:49:05,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:49:05,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-11-09 09:49:05,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=777, Invalid=2645, Unknown=0, NotChecked=0, Total=3422 [2021-11-09 09:49:05,912 INFO L87 Difference]: Start difference. First operand 460 states and 489 transitions. Second operand has 59 states, 59 states have (on average 4.661016949152542) internal successors, (275), 59 states have internal predecessors, (275), 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) [2021-11-09 09:49:06,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:49:06,629 INFO L93 Difference]: Finished difference Result 768 states and 814 transitions. [2021-11-09 09:49:06,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-09 09:49:06,630 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 4.661016949152542) internal successors, (275), 59 states have internal predecessors, (275), 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 141 [2021-11-09 09:49:06,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:49:06,632 INFO L225 Difference]: With dead ends: 768 [2021-11-09 09:49:06,632 INFO L226 Difference]: Without dead ends: 474 [2021-11-09 09:49:06,632 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1101, Invalid=3869, Unknown=0, NotChecked=0, Total=4970 [2021-11-09 09:49:06,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-11-09 09:49:06,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 468. [2021-11-09 09:49:06,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 467 states have (on average 1.0620985010706638) internal successors, (496), 467 states have internal predecessors, (496), 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) [2021-11-09 09:49:06,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 496 transitions. [2021-11-09 09:49:06,708 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 496 transitions. Word has length 141 [2021-11-09 09:49:06,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:49:06,709 INFO L470 AbstractCegarLoop]: Abstraction has 468 states and 496 transitions. [2021-11-09 09:49:06,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 4.661016949152542) internal successors, (275), 59 states have internal predecessors, (275), 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) [2021-11-09 09:49:06,709 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 496 transitions. [2021-11-09 09:49:06,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-09 09:49:06,710 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:49:06,710 INFO L513 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:49:06,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-11-09 09:49:06,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-11-09 09:49:06,910 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:49:06,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:49:06,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1517534378, now seen corresponding path program 24 times [2021-11-09 09:49:06,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:49:06,911 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893875150] [2021-11-09 09:49:06,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:49:06,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:49:06,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:49:07,928 INFO L134 CoverageAnalysis]: Checked inductivity of 937 backedges. 32 proven. 905 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:49:07,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:49:07,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893875150] [2021-11-09 09:49:07,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893875150] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:49:07,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199400253] [2021-11-09 09:49:07,929 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:49:07,929 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:49:07,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:49:07,930 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:49:07,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-11-09 09:49:11,068 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-11-09 09:49:11,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:49:11,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-09 09:49:11,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:49:11,853 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 20 treesize of output 16 [2021-11-09 09:49:11,914 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-09 09:49:11,914 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 29 treesize of output 28 [2021-11-09 09:49:14,356 INFO L134 CoverageAnalysis]: Checked inductivity of 937 backedges. 32 proven. 905 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:49:14,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199400253] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:49:14,358 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:49:14,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 32] total 64 [2021-11-09 09:49:14,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126306879] [2021-11-09 09:49:14,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-11-09 09:49:14,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:49:14,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-11-09 09:49:14,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=3834, Unknown=0, NotChecked=0, Total=4032 [2021-11-09 09:49:14,360 INFO L87 Difference]: Start difference. First operand 468 states and 496 transitions. Second operand has 64 states, 64 states have (on average 4.453125) internal successors, (285), 64 states have internal predecessors, (285), 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) [2021-11-09 09:49:28,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:49:28,280 INFO L93 Difference]: Finished difference Result 871 states and 916 transitions. [2021-11-09 09:49:28,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2021-11-09 09:49:28,281 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 4.453125) internal successors, (285), 64 states have internal predecessors, (285), 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 145 [2021-11-09 09:49:28,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:49:28,284 INFO L225 Difference]: With dead ends: 871 [2021-11-09 09:49:28,284 INFO L226 Difference]: Without dead ends: 861 [2021-11-09 09:49:28,287 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17027 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=2833, Invalid=50297, Unknown=0, NotChecked=0, Total=53130 [2021-11-09 09:49:28,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2021-11-09 09:49:28,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 474. [2021-11-09 09:49:28,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 1.0613107822410148) internal successors, (502), 473 states have internal predecessors, (502), 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) [2021-11-09 09:49:28,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 502 transitions. [2021-11-09 09:49:28,361 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 502 transitions. Word has length 145 [2021-11-09 09:49:28,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:49:28,361 INFO L470 AbstractCegarLoop]: Abstraction has 474 states and 502 transitions. [2021-11-09 09:49:28,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 4.453125) internal successors, (285), 64 states have internal predecessors, (285), 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) [2021-11-09 09:49:28,361 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 502 transitions. [2021-11-09 09:49:28,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-09 09:49:28,362 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:49:28,362 INFO L513 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:49:28,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-11-09 09:49:28,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:49:28,567 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:49:28,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:49:28,567 INFO L85 PathProgramCache]: Analyzing trace with hash -130953540, now seen corresponding path program 16 times [2021-11-09 09:49:28,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:49:28,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016501571] [2021-11-09 09:49:28,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:49:28,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:49:28,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:49:29,424 INFO L134 CoverageAnalysis]: Checked inductivity of 937 backedges. 32 proven. 905 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:49:29,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:49:29,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016501571] [2021-11-09 09:49:29,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016501571] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:49:29,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716948733] [2021-11-09 09:49:29,425 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:49:29,425 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:49:29,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:49:29,427 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:49:29,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-11-09 09:49:32,195 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:49:32,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:49:32,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-09 09:49:32,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:49:32,540 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 20 treesize of output 16 [2021-11-09 09:49:32,568 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 0 case distinctions, treesize of input 43 treesize of output 38 [2021-11-09 09:49:32,578 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-11-09 09:49:32,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 63 treesize of output 67 [2021-11-09 09:49:32,692 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-09 09:49:32,692 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:49:32,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2021-11-09 09:49:32,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444396688] [2021-11-09 09:49:32,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-09 09:49:32,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:49:32,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-09 09:49:32,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=988, Unknown=0, NotChecked=0, Total=1056 [2021-11-09 09:49:32,694 INFO L87 Difference]: Start difference. First operand 474 states and 502 transitions. Second operand has 32 states, 32 states have (on average 4.53125) internal successors, (145), 32 states have internal predecessors, (145), 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) [2021-11-09 09:49:37,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:49:37,078 INFO L93 Difference]: Finished difference Result 621 states and 661 transitions. [2021-11-09 09:49:37,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-11-09 09:49:37,079 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 4.53125) internal successors, (145), 32 states have internal predecessors, (145), 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 145 [2021-11-09 09:49:37,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:49:37,081 INFO L225 Difference]: With dead ends: 621 [2021-11-09 09:49:37,081 INFO L226 Difference]: Without dead ends: 611 [2021-11-09 09:49:37,082 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3280 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=737, Invalid=11695, Unknown=0, NotChecked=0, Total=12432 [2021-11-09 09:49:37,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2021-11-09 09:49:37,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 474. [2021-11-09 09:49:37,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 1.0613107822410148) internal successors, (502), 473 states have internal predecessors, (502), 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) [2021-11-09 09:49:37,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 502 transitions. [2021-11-09 09:49:37,139 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 502 transitions. Word has length 145 [2021-11-09 09:49:37,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:49:37,140 INFO L470 AbstractCegarLoop]: Abstraction has 474 states and 502 transitions. [2021-11-09 09:49:37,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.53125) internal successors, (145), 32 states have internal predecessors, (145), 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) [2021-11-09 09:49:37,140 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 502 transitions. [2021-11-09 09:49:37,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-09 09:49:37,141 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:49:37,141 INFO L513 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 11, 9, 9, 9, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:49:37,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-11-09 09:49:37,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-11-09 09:49:37,341 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:49:37,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:49:37,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1432393174, now seen corresponding path program 8 times [2021-11-09 09:49:37,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:49:37,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686270958] [2021-11-09 09:49:37,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:49:37,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:49:37,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:49:38,073 INFO L134 CoverageAnalysis]: Checked inductivity of 937 backedges. 361 proven. 156 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2021-11-09 09:49:38,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:49:38,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686270958] [2021-11-09 09:49:38,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686270958] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:49:38,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237651458] [2021-11-09 09:49:38,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:49:38,074 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:49:38,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:49:38,076 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:49:38,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-11-09 09:49:40,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:49:40,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:49:40,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-09 09:49:40,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:49:41,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-09 09:49:41,252 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-09 09:49:41,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-09 09:49:42,847 INFO L134 CoverageAnalysis]: Checked inductivity of 937 backedges. 0 proven. 937 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:49:42,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237651458] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:49:42,847 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:49:42,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 32] total 51 [2021-11-09 09:49:42,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38706264] [2021-11-09 09:49:42,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-09 09:49:42,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:49:42,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-09 09:49:42,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=2389, Unknown=0, NotChecked=0, Total=2550 [2021-11-09 09:49:42,849 INFO L87 Difference]: Start difference. First operand 474 states and 502 transitions. Second operand has 51 states, 51 states have (on average 4.333333333333333) internal successors, (221), 51 states have internal predecessors, (221), 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) [2021-11-09 09:49:48,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:49:48,879 INFO L93 Difference]: Finished difference Result 804 states and 860 transitions. [2021-11-09 09:49:48,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-11-09 09:49:48,879 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 4.333333333333333) internal successors, (221), 51 states have internal predecessors, (221), 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 145 [2021-11-09 09:49:48,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:49:48,881 INFO L225 Difference]: With dead ends: 804 [2021-11-09 09:49:48,882 INFO L226 Difference]: Without dead ends: 692 [2021-11-09 09:49:48,883 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 116 SyntacticMatches, 12 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5244 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1286, Invalid=16536, Unknown=0, NotChecked=0, Total=17822 [2021-11-09 09:49:48,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2021-11-09 09:49:48,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 486. [2021-11-09 09:49:48,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 1.0556701030927835) internal successors, (512), 485 states have internal predecessors, (512), 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) [2021-11-09 09:49:48,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 512 transitions. [2021-11-09 09:49:48,949 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 512 transitions. Word has length 145 [2021-11-09 09:49:48,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:49:48,950 INFO L470 AbstractCegarLoop]: Abstraction has 486 states and 512 transitions. [2021-11-09 09:49:48,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 4.333333333333333) internal successors, (221), 51 states have internal predecessors, (221), 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) [2021-11-09 09:49:48,950 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 512 transitions. [2021-11-09 09:49:48,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-09 09:49:48,951 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:49:48,952 INFO L513 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:49:48,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-11-09 09:49:49,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-11-09 09:49:49,156 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:49:49,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:49:49,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1283789693, now seen corresponding path program 25 times [2021-11-09 09:49:49,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:49:49,156 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034382830] [2021-11-09 09:49:49,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:49:49,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:49:49,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:49:50,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1037 backedges. 34 proven. 1003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:49:50,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:49:50,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034382830] [2021-11-09 09:49:50,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034382830] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:49:50,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690270459] [2021-11-09 09:49:50,033 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:49:50,033 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:49:50,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:49:50,034 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:49:50,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-11-09 09:49:53,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:49:53,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-09 09:49:53,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:49:53,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-09 09:49:55,279 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 31 treesize of output 19 [2021-11-09 09:49:55,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1037 backedges. 34 proven. 1003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:49:55,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690270459] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:49:55,296 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:49:55,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 32] total 63 [2021-11-09 09:49:55,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291604219] [2021-11-09 09:49:55,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-09 09:49:55,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:49:55,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-09 09:49:55,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=3733, Unknown=0, NotChecked=0, Total=3906 [2021-11-09 09:49:55,298 INFO L87 Difference]: Start difference. First operand 486 states and 512 transitions. Second operand has 63 states, 63 states have (on average 4.698412698412699) internal successors, (296), 63 states have internal predecessors, (296), 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) [2021-11-09 09:50:07,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:50:07,530 INFO L93 Difference]: Finished difference Result 881 states and 919 transitions. [2021-11-09 09:50:07,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2021-11-09 09:50:07,531 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 4.698412698412699) internal successors, (296), 63 states have internal predecessors, (296), 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 151 [2021-11-09 09:50:07,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:50:07,534 INFO L225 Difference]: With dead ends: 881 [2021-11-09 09:50:07,534 INFO L226 Difference]: Without dead ends: 871 [2021-11-09 09:50:07,536 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13518 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=2360, Invalid=44946, Unknown=0, NotChecked=0, Total=47306 [2021-11-09 09:50:07,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2021-11-09 09:50:07,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 492. [2021-11-09 09:50:07,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 491 states have (on average 1.054989816700611) internal successors, (518), 491 states have internal predecessors, (518), 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) [2021-11-09 09:50:07,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 518 transitions. [2021-11-09 09:50:07,596 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 518 transitions. Word has length 151 [2021-11-09 09:50:07,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:50:07,596 INFO L470 AbstractCegarLoop]: Abstraction has 492 states and 518 transitions. [2021-11-09 09:50:07,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 4.698412698412699) internal successors, (296), 63 states have internal predecessors, (296), 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) [2021-11-09 09:50:07,596 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 518 transitions. [2021-11-09 09:50:07,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-09 09:50:07,597 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:50:07,597 INFO L513 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:50:07,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-11-09 09:50:07,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-11-09 09:50:07,798 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:50:07,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:50:07,798 INFO L85 PathProgramCache]: Analyzing trace with hash 203280399, now seen corresponding path program 17 times [2021-11-09 09:50:07,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:50:07,798 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373708838] [2021-11-09 09:50:07,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:50:07,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:50:07,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:50:08,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1037 backedges. 0 proven. 1037 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:50:08,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:50:08,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373708838] [2021-11-09 09:50:08,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373708838] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:50:08,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159665234] [2021-11-09 09:50:08,463 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:50:08,463 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:50:08,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:50:08,463 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:50:08,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-11-09 09:50:12,057 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-11-09 09:50:12,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:50:12,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-09 09:50:12,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:50:12,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-09 09:50:12,373 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-09 09:50:12,373 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 26 treesize of output 25 [2021-11-09 09:50:12,448 INFO L354 Elim1Store]: treesize reduction 88, result has 20.0 percent of original size [2021-11-09 09:50:12,448 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 38 treesize of output 40 [2021-11-09 09:50:12,640 INFO L354 Elim1Store]: treesize reduction 162, result has 17.3 percent of original size [2021-11-09 09:50:12,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 63 [2021-11-09 09:50:12,771 INFO L354 Elim1Store]: treesize reduction 254, result has 15.3 percent of original size [2021-11-09 09:50:12,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 70 treesize of output 78 [2021-11-09 09:50:13,121 INFO L354 Elim1Store]: treesize reduction 364, result has 13.7 percent of original size [2021-11-09 09:50:13,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 87 treesize of output 98 [2021-11-09 09:50:13,358 INFO L354 Elim1Store]: treesize reduction 492, result has 12.5 percent of original size [2021-11-09 09:50:13,358 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 21 case distinctions, treesize of input 99 treesize of output 113 [2021-11-09 09:50:13,925 INFO L354 Elim1Store]: treesize reduction 638, result has 11.4 percent of original size [2021-11-09 09:50:13,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 116 treesize of output 133 [2021-11-09 09:50:14,260 INFO L354 Elim1Store]: treesize reduction 802, result has 10.5 percent of original size [2021-11-09 09:50:14,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 128 treesize of output 148 [2021-11-09 09:50:15,032 INFO L354 Elim1Store]: treesize reduction 984, result has 9.7 percent of original size [2021-11-09 09:50:15,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 45 case distinctions, treesize of input 145 treesize of output 168 [2021-11-09 09:50:15,505 INFO L354 Elim1Store]: treesize reduction 1184, result has 9.1 percent of original size [2021-11-09 09:50:15,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 55 case distinctions, treesize of input 157 treesize of output 183 [2021-11-09 09:50:16,585 INFO L354 Elim1Store]: treesize reduction 1402, result has 8.5 percent of original size [2021-11-09 09:50:16,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 66 case distinctions, treesize of input 174 treesize of output 203 [2021-11-09 09:50:17,292 INFO L354 Elim1Store]: treesize reduction 1638, result has 8.0 percent of original size [2021-11-09 09:50:17,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 78 case distinctions, treesize of input 186 treesize of output 218 [2021-11-09 09:50:19,987 INFO L354 Elim1Store]: treesize reduction 1892, result has 7.5 percent of original size [2021-11-09 09:50:19,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 91 case distinctions, treesize of input 245 treesize of output 235 [2021-11-09 09:50:22,906 INFO L354 Elim1Store]: treesize reduction 2164, result has 7.1 percent of original size [2021-11-09 09:50:22,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 105 case distinctions, treesize of input 257 treesize of output 250 [2021-11-09 09:51:01,877 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-09 09:51:01,877 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:51:01,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2021-11-09 09:51:01,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503223427] [2021-11-09 09:51:01,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-09 09:51:01,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:51:01,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-09 09:51:01,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=3084, Unknown=9, NotChecked=0, Total=3306 [2021-11-09 09:51:01,878 INFO L87 Difference]: Start difference. First operand 492 states and 518 transitions. Second operand has 33 states, 33 states have (on average 4.575757575757576) internal successors, (151), 33 states have internal predecessors, (151), 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) [2021-11-09 09:51:07,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:51:07,821 INFO L93 Difference]: Finished difference Result 628 states and 664 transitions. [2021-11-09 09:51:07,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-11-09 09:51:07,822 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 4.575757575757576) internal successors, (151), 33 states have internal predecessors, (151), 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 151 [2021-11-09 09:51:07,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:51:07,824 INFO L225 Difference]: With dead ends: 628 [2021-11-09 09:51:07,824 INFO L226 Difference]: Without dead ends: 626 [2021-11-09 09:51:07,825 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7610 ImplicationChecksByTransitivity, 47.3s TimeCoverageRelationStatistics Valid=1112, Invalid=24319, Unknown=9, NotChecked=0, Total=25440 [2021-11-09 09:51:07,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2021-11-09 09:51:07,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 504. [2021-11-09 09:51:07,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 503 states have (on average 1.0556660039761432) internal successors, (531), 503 states have internal predecessors, (531), 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) [2021-11-09 09:51:07,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 531 transitions. [2021-11-09 09:51:07,885 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 531 transitions. Word has length 151 [2021-11-09 09:51:07,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:51:07,885 INFO L470 AbstractCegarLoop]: Abstraction has 504 states and 531 transitions. [2021-11-09 09:51:07,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.575757575757576) internal successors, (151), 33 states have internal predecessors, (151), 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) [2021-11-09 09:51:07,885 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 531 transitions. [2021-11-09 09:51:07,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-09 09:51:07,886 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:51:07,886 INFO L513 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:51:07,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-11-09 09:51:08,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-11-09 09:51:08,087 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:51:08,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:51:08,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1618952176, now seen corresponding path program 26 times [2021-11-09 09:51:08,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:51:08,088 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463857114] [2021-11-09 09:51:08,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:51:08,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:51:08,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:51:09,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 887 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:51:09,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:51:09,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463857114] [2021-11-09 09:51:09,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463857114] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:51:09,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899727047] [2021-11-09 09:51:09,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:51:09,282 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:51:09,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:51:09,283 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:51:09,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-11-09 09:51:12,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:51:12,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:51:12,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-09 09:51:12,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:51:15,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 990 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:51:15,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899727047] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:51:15,441 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:51:15,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 65 [2021-11-09 09:51:15,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078988897] [2021-11-09 09:51:15,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-11-09 09:51:15,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:51:15,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-11-09 09:51:15,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=937, Invalid=3223, Unknown=0, NotChecked=0, Total=4160 [2021-11-09 09:51:15,443 INFO L87 Difference]: Start difference. First operand 504 states and 531 transitions. Second operand has 65 states, 65 states have (on average 4.723076923076923) internal successors, (307), 65 states have internal predecessors, (307), 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) [2021-11-09 09:51:16,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:51:16,166 INFO L93 Difference]: Finished difference Result 788 states and 827 transitions. [2021-11-09 09:51:16,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-09 09:51:16,166 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 4.723076923076923) internal successors, (307), 65 states have internal predecessors, (307), 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 157 [2021-11-09 09:51:16,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:51:16,168 INFO L225 Difference]: With dead ends: 788 [2021-11-09 09:51:16,168 INFO L226 Difference]: Without dead ends: 458 [2021-11-09 09:51:16,169 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1814 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1314, Invalid=4692, Unknown=0, NotChecked=0, Total=6006 [2021-11-09 09:51:16,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-11-09 09:51:16,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 449. [2021-11-09 09:51:16,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 1.0491071428571428) internal successors, (470), 448 states have internal predecessors, (470), 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) [2021-11-09 09:51:16,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 470 transitions. [2021-11-09 09:51:16,231 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 470 transitions. Word has length 157 [2021-11-09 09:51:16,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:51:16,231 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 470 transitions. [2021-11-09 09:51:16,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 4.723076923076923) internal successors, (307), 65 states have internal predecessors, (307), 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) [2021-11-09 09:51:16,231 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 470 transitions. [2021-11-09 09:51:16,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-09 09:51:16,232 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:51:16,232 INFO L513 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:51:16,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-11-09 09:51:16,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-11-09 09:51:16,433 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:51:16,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:51:16,433 INFO L85 PathProgramCache]: Analyzing trace with hash -2009084279, now seen corresponding path program 27 times [2021-11-09 09:51:16,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:51:16,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137431738] [2021-11-09 09:51:16,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:51:16,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:51:16,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:51:17,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 36 proven. 1144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:51:17,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:51:17,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137431738] [2021-11-09 09:51:17,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137431738] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:51:17,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962389504] [2021-11-09 09:51:17,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:51:17,662 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:51:17,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:51:17,664 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:51:17,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-11-09 09:51:22,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2021-11-09 09:51:22,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:51:22,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 69 conjunts are in the unsatisfiable core [2021-11-09 09:51:22,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:51:23,719 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 20 treesize of output 16 [2021-11-09 09:51:23,829 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-09 09:51:23,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-09 09:51:27,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 36 proven. 1144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:51:27,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962389504] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:51:27,116 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:51:27,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 35] total 68 [2021-11-09 09:51:27,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277882431] [2021-11-09 09:51:27,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-11-09 09:51:27,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:51:27,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-11-09 09:51:27,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=4347, Unknown=0, NotChecked=0, Total=4556 [2021-11-09 09:51:27,118 INFO L87 Difference]: Start difference. First operand 449 states and 470 transitions. Second operand has 68 states, 68 states have (on average 4.573529411764706) internal successors, (311), 68 states have internal predecessors, (311), 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) [2021-11-09 09:51:48,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:51:48,341 INFO L93 Difference]: Finished difference Result 883 states and 923 transitions. [2021-11-09 09:51:48,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 195 states. [2021-11-09 09:51:48,342 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 4.573529411764706) internal successors, (311), 68 states have internal predecessors, (311), 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 161 [2021-11-09 09:51:48,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:51:48,346 INFO L225 Difference]: With dead ends: 883 [2021-11-09 09:51:48,346 INFO L226 Difference]: Without dead ends: 873 [2021-11-09 09:51:48,349 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 248 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20218 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=2934, Invalid=59316, Unknown=0, NotChecked=0, Total=62250 [2021-11-09 09:51:48,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2021-11-09 09:51:48,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 455. [2021-11-09 09:51:48,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 454 states have (on average 1.0484581497797356) internal successors, (476), 454 states have internal predecessors, (476), 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) [2021-11-09 09:51:48,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 476 transitions. [2021-11-09 09:51:48,448 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 476 transitions. Word has length 161 [2021-11-09 09:51:48,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:51:48,448 INFO L470 AbstractCegarLoop]: Abstraction has 455 states and 476 transitions. [2021-11-09 09:51:48,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 4.573529411764706) internal successors, (311), 68 states have internal predecessors, (311), 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) [2021-11-09 09:51:48,448 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 476 transitions. [2021-11-09 09:51:48,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-09 09:51:48,450 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:51:48,450 INFO L513 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:51:48,491 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2021-11-09 09:51:48,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:51:48,651 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:51:48,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:51:48,651 INFO L85 PathProgramCache]: Analyzing trace with hash 552062877, now seen corresponding path program 18 times [2021-11-09 09:51:48,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:51:48,651 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982182149] [2021-11-09 09:51:48,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:51:48,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:51:48,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:51:49,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 36 proven. 1144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:51:49,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:51:49,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982182149] [2021-11-09 09:51:49,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982182149] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:51:49,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096018802] [2021-11-09 09:51:49,925 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:51:49,925 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:51:49,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:51:49,926 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:51:49,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-11-09 09:51:55,377 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-11-09 09:51:55,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:51:55,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-09 09:51:55,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:51:55,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-09 09:51:55,943 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-09 09:51:55,943 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 26 treesize of output 25 [2021-11-09 09:51:56,043 INFO L354 Elim1Store]: treesize reduction 88, result has 20.0 percent of original size [2021-11-09 09:51:56,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 40 [2021-11-09 09:51:56,348 INFO L354 Elim1Store]: treesize reduction 162, result has 17.3 percent of original size [2021-11-09 09:51:56,348 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 6 case distinctions, treesize of input 58 treesize of output 63 [2021-11-09 09:51:56,532 INFO L354 Elim1Store]: treesize reduction 254, result has 15.3 percent of original size [2021-11-09 09:51:56,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 70 treesize of output 78 [2021-11-09 09:51:57,017 INFO L354 Elim1Store]: treesize reduction 364, result has 13.7 percent of original size [2021-11-09 09:51:57,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 87 treesize of output 98 [2021-11-09 09:51:57,317 INFO L354 Elim1Store]: treesize reduction 492, result has 12.5 percent of original size [2021-11-09 09:51:57,317 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 21 case distinctions, treesize of input 99 treesize of output 113 [2021-11-09 09:51:58,042 INFO L354 Elim1Store]: treesize reduction 638, result has 11.4 percent of original size [2021-11-09 09:51:58,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 116 treesize of output 133 [2021-11-09 09:51:58,501 INFO L354 Elim1Store]: treesize reduction 802, result has 10.5 percent of original size [2021-11-09 09:51:58,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 128 treesize of output 148 [2021-11-09 09:51:59,495 INFO L354 Elim1Store]: treesize reduction 984, result has 9.7 percent of original size [2021-11-09 09:51:59,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 45 case distinctions, treesize of input 169 treesize of output 165 [2021-11-09 09:52:00,141 INFO L354 Elim1Store]: treesize reduction 1184, result has 9.1 percent of original size [2021-11-09 09:52:00,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 55 case distinctions, treesize of input 181 treesize of output 180 [2021-11-09 09:52:00,824 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-09 09:52:00,824 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:52:00,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2021-11-09 09:52:00,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75922552] [2021-11-09 09:52:00,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-09 09:52:00,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:52:00,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-09 09:52:00,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=3002, Unknown=0, NotChecked=0, Total=3192 [2021-11-09 09:52:00,825 INFO L87 Difference]: Start difference. First operand 455 states and 476 transitions. Second operand has 35 states, 35 states have (on average 4.6) internal successors, (161), 35 states have internal predecessors, (161), 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) [2021-11-09 09:52:07,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:52:07,670 INFO L93 Difference]: Finished difference Result 589 states and 623 transitions. [2021-11-09 09:52:07,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-11-09 09:52:07,670 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 4.6) internal successors, (161), 35 states have internal predecessors, (161), 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 161 [2021-11-09 09:52:07,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:52:07,672 INFO L225 Difference]: With dead ends: 589 [2021-11-09 09:52:07,672 INFO L226 Difference]: Without dead ends: 579 [2021-11-09 09:52:07,674 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6042 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=974, Invalid=20196, Unknown=0, NotChecked=0, Total=21170 [2021-11-09 09:52:07,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-11-09 09:52:07,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 455. [2021-11-09 09:52:07,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 454 states have (on average 1.0484581497797356) internal successors, (476), 454 states have internal predecessors, (476), 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) [2021-11-09 09:52:07,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 476 transitions. [2021-11-09 09:52:07,748 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 476 transitions. Word has length 161 [2021-11-09 09:52:07,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:52:07,749 INFO L470 AbstractCegarLoop]: Abstraction has 455 states and 476 transitions. [2021-11-09 09:52:07,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 4.6) internal successors, (161), 35 states have internal predecessors, (161), 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) [2021-11-09 09:52:07,749 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 476 transitions. [2021-11-09 09:52:07,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-09 09:52:07,751 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:52:07,751 INFO L513 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 13, 10, 10, 10, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:52:07,791 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2021-11-09 09:52:07,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:52:07,967 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:52:07,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:07,967 INFO L85 PathProgramCache]: Analyzing trace with hash 750722289, now seen corresponding path program 9 times [2021-11-09 09:52:07,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:07,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623387492] [2021-11-09 09:52:07,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:07,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:08,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:09,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 0 proven. 1180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:52:09,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:09,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623387492] [2021-11-09 09:52:09,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623387492] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:09,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518889282] [2021-11-09 09:52:09,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:52:09,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:52:09,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:52:09,267 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:52:09,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbc5042-b3cf-446a-ab84-c4cb32c17fef/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-11-09 09:52:16,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-11-09 09:52:16,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:52:16,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-09 09:52:16,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:52:16,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-09 09:52:16,364 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-11-09 09:52:16,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-11-09 09:52:16,651 INFO L354 Elim1Store]: treesize reduction 100, result has 20.0 percent of original size [2021-11-09 09:52:16,651 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 52 treesize of output 54 [2021-11-09 09:52:16,840 INFO L354 Elim1Store]: treesize reduction 177, result has 17.3 percent of original size [2021-11-09 09:52:16,840 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 6 case distinctions, treesize of input 64 treesize of output 69 [2021-11-09 09:52:17,464 INFO L354 Elim1Store]: treesize reduction 272, result has 15.3 percent of original size [2021-11-09 09:52:17,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 81 treesize of output 89 [2021-11-09 09:52:17,706 INFO L354 Elim1Store]: treesize reduction 385, result has 13.7 percent of original size [2021-11-09 09:52:17,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 93 treesize of output 104 [2021-11-09 09:52:18,458 INFO L354 Elim1Store]: treesize reduction 516, result has 12.4 percent of original size [2021-11-09 09:52:18,458 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 21 case distinctions, treesize of input 110 treesize of output 124 [2021-11-09 09:52:18,832 INFO L354 Elim1Store]: treesize reduction 665, result has 11.3 percent of original size [2021-11-09 09:52:18,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 122 treesize of output 139 [2021-11-09 09:52:20,253 INFO L354 Elim1Store]: treesize reduction 832, result has 10.4 percent of original size [2021-11-09 09:52:20,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 139 treesize of output 159 [2021-11-09 09:52:20,800 INFO L354 Elim1Store]: treesize reduction 1017, result has 9.7 percent of original size [2021-11-09 09:52:20,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 45 case distinctions, treesize of input 151 treesize of output 174 [2021-11-09 09:52:22,430 INFO L354 Elim1Store]: treesize reduction 1220, result has 9.0 percent of original size [2021-11-09 09:52:22,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 55 case distinctions, treesize of input 168 treesize of output 194 [2021-11-09 09:52:23,340 INFO L354 Elim1Store]: treesize reduction 1441, result has 8.4 percent of original size [2021-11-09 09:52:23,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 66 case distinctions, treesize of input 180 treesize of output 209 [2021-11-09 09:52:26,770 INFO L354 Elim1Store]: treesize reduction 1680, result has 7.9 percent of original size [2021-11-09 09:52:26,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 78 case distinctions, treesize of input 197 treesize of output 229 [2021-11-09 09:52:29,243 INFO L354 Elim1Store]: treesize reduction 1937, result has 7.5 percent of original size [2021-11-09 09:52:29,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 91 case distinctions, treesize of input 209 treesize of output 244