./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive/MultCommutative-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7e70badd Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive/MultCommutative-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G --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 ce29b37e076ab683230ebf17073db3b7759ea39570dd2ef64322b6d43bb636cd --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 13:39:45,084 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 13:39:45,087 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 13:39:45,141 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 13:39:45,141 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 13:39:45,146 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 13:39:45,147 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 13:39:45,149 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 13:39:45,151 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 13:39:45,152 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 13:39:45,154 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 13:39:45,155 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 13:39:45,156 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 13:39:45,157 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 13:39:45,159 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 13:39:45,160 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 13:39:45,161 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 13:39:45,163 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 13:39:45,165 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 13:39:45,167 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 13:39:45,169 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 13:39:45,171 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 13:39:45,172 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 13:39:45,174 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 13:39:45,177 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 13:39:45,178 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 13:39:45,178 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 13:39:45,180 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 13:39:45,180 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 13:39:45,182 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 13:39:45,182 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 13:39:45,183 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 13:39:45,184 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 13:39:45,185 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 13:39:45,186 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 13:39:45,187 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 13:39:45,188 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 13:39:45,188 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 13:39:45,188 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 13:39:45,189 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 13:39:45,190 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 13:39:45,191 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-23 13:39:45,219 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 13:39:45,219 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 13:39:45,220 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 13:39:45,220 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 13:39:45,222 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 13:39:45,222 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 13:39:45,222 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 13:39:45,223 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 13:39:45,223 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 13:39:45,223 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 13:39:45,224 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 13:39:45,225 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 13:39:45,225 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 13:39:45,225 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 13:39:45,225 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 13:39:45,226 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 13:39:45,226 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 13:39:45,226 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 13:39:45,226 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 13:39:45,227 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 13:39:45,227 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 13:39:45,227 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 13:39:45,228 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 13:39:45,228 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 13:39:45,228 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 13:39:45,229 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 13:39:45,229 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 13:39:45,229 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 13:39:45,229 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-23 13:39:45,231 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-23 13:39:45,231 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 13:39:45,232 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 13:39:45,232 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_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ce29b37e076ab683230ebf17073db3b7759ea39570dd2ef64322b6d43bb636cd [2021-11-23 13:39:45,490 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 13:39:45,516 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 13:39:45,518 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 13:39:45,519 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 13:39:45,521 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 13:39:45,523 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/recursive/MultCommutative-2.c [2021-11-23 13:39:45,601 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/data/e0efa9e9c/0326f632285f4922be8fd488e68613cf/FLAG680b802a8 [2021-11-23 13:39:46,071 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 13:39:46,072 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/sv-benchmarks/c/recursive/MultCommutative-2.c [2021-11-23 13:39:46,078 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/data/e0efa9e9c/0326f632285f4922be8fd488e68613cf/FLAG680b802a8 [2021-11-23 13:39:46,469 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/data/e0efa9e9c/0326f632285f4922be8fd488e68613cf [2021-11-23 13:39:46,472 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 13:39:46,473 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 13:39:46,475 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 13:39:46,475 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 13:39:46,479 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 13:39:46,479 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:39:46" (1/1) ... [2021-11-23 13:39:46,481 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1adac1ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:39:46, skipping insertion in model container [2021-11-23 13:39:46,481 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:39:46" (1/1) ... [2021-11-23 13:39:46,488 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 13:39:46,502 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 13:39:46,669 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/sv-benchmarks/c/recursive/MultCommutative-2.c[970,983] [2021-11-23 13:39:46,686 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:39:46,695 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 13:39:46,719 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/sv-benchmarks/c/recursive/MultCommutative-2.c[970,983] [2021-11-23 13:39:46,720 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:39:46,741 INFO L208 MainTranslator]: Completed translation [2021-11-23 13:39:46,744 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:39:46 WrapperNode [2021-11-23 13:39:46,744 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 13:39:46,746 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 13:39:46,746 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 13:39:46,747 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 13:39:46,755 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:39:46" (1/1) ... [2021-11-23 13:39:46,765 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:39:46" (1/1) ... [2021-11-23 13:39:46,789 INFO L137 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 36 [2021-11-23 13:39:46,789 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 13:39:46,790 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 13:39:46,790 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 13:39:46,790 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 13:39:46,799 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:39:46" (1/1) ... [2021-11-23 13:39:46,799 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:39:46" (1/1) ... [2021-11-23 13:39:46,813 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:39:46" (1/1) ... [2021-11-23 13:39:46,813 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:39:46" (1/1) ... [2021-11-23 13:39:46,816 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:39:46" (1/1) ... [2021-11-23 13:39:46,818 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:39:46" (1/1) ... [2021-11-23 13:39:46,819 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:39:46" (1/1) ... [2021-11-23 13:39:46,820 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 13:39:46,823 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 13:39:46,823 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 13:39:46,823 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 13:39:46,824 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:39:46" (1/1) ... [2021-11-23 13:39:46,837 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 13:39:46,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:39:46,862 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 13:39:46,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 13:39:46,905 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 13:39:46,905 INFO L130 BoogieDeclarations]: Found specification of procedure mult [2021-11-23 13:39:46,906 INFO L138 BoogieDeclarations]: Found implementation of procedure mult [2021-11-23 13:39:46,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 13:39:46,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 13:39:46,907 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 13:39:46,958 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 13:39:46,959 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 13:39:47,065 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 13:39:47,071 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 13:39:47,071 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 13:39:47,073 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:39:47 BoogieIcfgContainer [2021-11-23 13:39:47,073 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 13:39:47,075 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 13:39:47,076 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 13:39:47,079 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 13:39:47,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:39:46" (1/3) ... [2021-11-23 13:39:47,080 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64703c55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:39:47, skipping insertion in model container [2021-11-23 13:39:47,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:39:46" (2/3) ... [2021-11-23 13:39:47,081 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64703c55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:39:47, skipping insertion in model container [2021-11-23 13:39:47,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:39:47" (3/3) ... [2021-11-23 13:39:47,083 INFO L111 eAbstractionObserver]: Analyzing ICFG MultCommutative-2.c [2021-11-23 13:39:47,088 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 13:39:47,088 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 13:39:47,139 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 13:39:47,147 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 [2021-11-23 13:39:47,148 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 13:39:47,165 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 13:39:47,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 13:39:47,172 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:39:47,172 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:39:47,173 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:39:47,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:39:47,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1513944532, now seen corresponding path program 1 times [2021-11-23 13:39:47,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:39:47,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240571415] [2021-11-23 13:39:47,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:39:47,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:39:47,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:39:47,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-23 13:39:47,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:39:47,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-23 13:39:47,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:39:47,532 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 13:39:47,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:39:47,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240571415] [2021-11-23 13:39:47,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240571415] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:39:47,535 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:39:47,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 13:39:47,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885341291] [2021-11-23 13:39:47,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:39:47,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 13:39:47,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:39:47,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 13:39:47,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-23 13:39:47,590 INFO L87 Difference]: Start difference. First operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 13:39:47,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:39:47,689 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2021-11-23 13:39:47,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 13:39:47,694 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-11-23 13:39:47,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:39:47,703 INFO L225 Difference]: With dead ends: 44 [2021-11-23 13:39:47,703 INFO L226 Difference]: Without dead ends: 28 [2021-11-23 13:39:47,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-23 13:39:47,710 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 12 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:39:47,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 156 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:39:47,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-23 13:39:47,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2021-11-23 13:39:47,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-11-23 13:39:47,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2021-11-23 13:39:47,755 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 20 [2021-11-23 13:39:47,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:39:47,756 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2021-11-23 13:39:47,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 13:39:47,757 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2021-11-23 13:39:47,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-23 13:39:47,759 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:39:47,760 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:39:47,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 13:39:47,761 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:39:47,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:39:47,762 INFO L85 PathProgramCache]: Analyzing trace with hash 555960324, now seen corresponding path program 1 times [2021-11-23 13:39:47,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:39:47,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270517903] [2021-11-23 13:39:47,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:39:47,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:39:47,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:39:47,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-23 13:39:47,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:39:47,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-23 13:39:47,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:39:47,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-23 13:39:47,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:39:47,939 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 13:39:47,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:39:47,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270517903] [2021-11-23 13:39:47,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270517903] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:39:47,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88357291] [2021-11-23 13:39:47,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:39:47,941 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:39:47,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:39:47,943 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:39:47,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 13:39:48,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:39:48,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 13:39:48,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:39:48,203 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 13:39:48,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:39:48,365 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 13:39:48,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88357291] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:39:48,366 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:39:48,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 13 [2021-11-23 13:39:48,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872005408] [2021-11-23 13:39:48,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:39:48,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-23 13:39:48,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:39:48,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-23 13:39:48,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-11-23 13:39:48,370 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 4 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-23 13:39:48,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:39:48,564 INFO L93 Difference]: Finished difference Result 52 states and 83 transitions. [2021-11-23 13:39:48,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 13:39:48,565 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 4 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 26 [2021-11-23 13:39:48,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:39:48,566 INFO L225 Difference]: With dead ends: 52 [2021-11-23 13:39:48,566 INFO L226 Difference]: Without dead ends: 27 [2021-11-23 13:39:48,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-11-23 13:39:48,569 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 17 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:39:48,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 121 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:39:48,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-23 13:39:48,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2021-11-23 13:39:48,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 states have internal predecessors, (19), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-23 13:39:48,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2021-11-23 13:39:48,579 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 26 [2021-11-23 13:39:48,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:39:48,580 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2021-11-23 13:39:48,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 4 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-23 13:39:48,580 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2021-11-23 13:39:48,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-23 13:39:48,582 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:39:48,582 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:39:48,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 13:39:48,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:39:48,798 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:39:48,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:39:48,799 INFO L85 PathProgramCache]: Analyzing trace with hash 2011031750, now seen corresponding path program 1 times [2021-11-23 13:39:48,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:39:48,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890901202] [2021-11-23 13:39:48,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:39:48,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:39:48,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:39:48,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-23 13:39:48,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:39:48,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:39:48,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:39:48,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-23 13:39:48,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:39:48,878 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 13:39:48,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:39:48,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890901202] [2021-11-23 13:39:48,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890901202] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:39:48,879 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:39:48,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 13:39:48,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986571388] [2021-11-23 13:39:48,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:39:48,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 13:39:48,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:39:48,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 13:39:48,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:39:48,881 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-23 13:39:48,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:39:48,920 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2021-11-23 13:39:48,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 13:39:48,920 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 27 [2021-11-23 13:39:48,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:39:48,922 INFO L225 Difference]: With dead ends: 31 [2021-11-23 13:39:48,922 INFO L226 Difference]: Without dead ends: 27 [2021-11-23 13:39:48,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 13:39:48,930 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 8 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:39:48,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 45 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:39:48,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-23 13:39:48,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-11-23 13:39:48,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 20 states have internal predecessors, (20), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-23 13:39:48,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2021-11-23 13:39:48,950 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 27 [2021-11-23 13:39:48,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:39:48,950 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2021-11-23 13:39:48,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-23 13:39:48,951 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2021-11-23 13:39:48,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-23 13:39:48,957 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:39:48,957 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:39:48,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 13:39:48,957 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:39:48,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:39:48,958 INFO L85 PathProgramCache]: Analyzing trace with hash -760266050, now seen corresponding path program 2 times [2021-11-23 13:39:48,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:39:48,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873696978] [2021-11-23 13:39:48,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:39:48,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:39:49,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:39:49,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-23 13:39:49,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:39:49,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:39:49,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:39:49,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-23 13:39:49,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:39:49,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:39:49,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:39:49,364 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 13:39:49,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:39:49,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873696978] [2021-11-23 13:39:49,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873696978] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:39:49,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927478873] [2021-11-23 13:39:49,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 13:39:49,365 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:39:49,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:39:49,371 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:39:49,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 13:39:49,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 13:39:49,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:39:49,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-23 13:39:49,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:39:49,956 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 13:39:49,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:39:51,192 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 13:39:51,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927478873] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:39:51,193 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:39:51,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 14] total 35 [2021-11-23 13:39:51,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206462833] [2021-11-23 13:39:51,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:39:51,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-23 13:39:51,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:39:51,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-23 13:39:51,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1059, Unknown=0, NotChecked=0, Total=1190 [2021-11-23 13:39:51,196 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 35 states, 32 states have (on average 1.5625) internal successors, (50), 24 states have internal predecessors, (50), 8 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) [2021-11-23 13:39:51,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:39:51,709 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2021-11-23 13:39:51,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 13:39:51,709 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 1.5625) internal successors, (50), 24 states have internal predecessors, (50), 8 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) Word has length 34 [2021-11-23 13:39:51,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:39:51,711 INFO L225 Difference]: With dead ends: 40 [2021-11-23 13:39:51,711 INFO L226 Difference]: Without dead ends: 36 [2021-11-23 13:39:51,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=235, Invalid=1571, Unknown=0, NotChecked=0, Total=1806 [2021-11-23 13:39:51,714 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 41 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 13:39:51,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 188 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 13:39:51,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-23 13:39:51,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2021-11-23 13:39:51,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 23 states have internal predecessors, (23), 5 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2021-11-23 13:39:51,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-11-23 13:39:51,725 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 34 [2021-11-23 13:39:51,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:39:51,725 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-11-23 13:39:51,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 1.5625) internal successors, (50), 24 states have internal predecessors, (50), 8 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) [2021-11-23 13:39:51,726 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-11-23 13:39:51,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-23 13:39:51,728 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:39:51,728 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:39:51,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 13:39:51,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:39:51,942 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:39:51,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:39:51,943 INFO L85 PathProgramCache]: Analyzing trace with hash -757286924, now seen corresponding path program 1 times [2021-11-23 13:39:51,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:39:51,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779676333] [2021-11-23 13:39:51,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:39:51,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:39:51,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:39:51,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-23 13:39:51,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:39:51,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:39:51,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:39:51,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-23 13:39:52,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:39:52,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:39:52,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:39:52,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-23 13:39:52,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:39:52,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:39:52,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:39:52,100 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 5 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-23 13:39:52,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:39:52,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779676333] [2021-11-23 13:39:52,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779676333] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:39:52,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709604] [2021-11-23 13:39:52,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:39:52,102 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:39:52,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:39:52,106 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:39:52,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 13:39:52,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:39:52,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 13:39:52,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:39:52,259 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-23 13:39:52,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:39:52,445 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 10 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-23 13:39:52,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709604] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:39:52,445 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:39:52,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 12 [2021-11-23 13:39:52,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149784054] [2021-11-23 13:39:52,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:39:52,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 13:39:52,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:39:52,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 13:39:52,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-23 13:39:52,449 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 12 states, 10 states have (on average 3.5) internal successors, (35), 12 states have internal predecessors, (35), 6 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) [2021-11-23 13:39:52,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:39:52,525 INFO L93 Difference]: Finished difference Result 54 states and 77 transitions. [2021-11-23 13:39:52,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 13:39:52,528 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.5) internal successors, (35), 12 states have internal predecessors, (35), 6 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) Word has length 47 [2021-11-23 13:39:52,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:39:52,529 INFO L225 Difference]: With dead ends: 54 [2021-11-23 13:39:52,529 INFO L226 Difference]: Without dead ends: 25 [2021-11-23 13:39:52,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-11-23 13:39:52,531 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 22 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:39:52,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 80 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:39:52,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-23 13:39:52,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-11-23 13:39:52,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 18 states have internal predecessors, (18), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-23 13:39:52,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2021-11-23 13:39:52,538 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 47 [2021-11-23 13:39:52,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:39:52,538 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2021-11-23 13:39:52,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.5) internal successors, (35), 12 states have internal predecessors, (35), 6 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) [2021-11-23 13:39:52,539 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2021-11-23 13:39:52,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-23 13:39:52,540 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:39:52,540 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:39:52,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 13:39:52,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:39:52,754 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:39:52,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:39:52,754 INFO L85 PathProgramCache]: Analyzing trace with hash -983670890, now seen corresponding path program 3 times [2021-11-23 13:39:52,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:39:52,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608156781] [2021-11-23 13:39:52,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:39:52,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:39:52,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:39:52,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-23 13:39:52,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:39:52,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:39:52,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:39:52,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-23 13:39:52,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:39:53,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:39:53,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:39:53,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:39:53,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:39:53,196 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-23 13:39:53,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:39:53,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608156781] [2021-11-23 13:39:53,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608156781] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:39:53,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377134272] [2021-11-23 13:39:53,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 13:39:53,198 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:39:53,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:39:53,199 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:39:53,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 13:39:53,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-23 13:39:53,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:39:53,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-23 13:39:53,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:39:53,868 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 17 proven. 26 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-23 13:39:53,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:39:56,031 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 13:39:56,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377134272] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:39:56,032 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:39:56,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 20] total 49 [2021-11-23 13:39:56,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537399202] [2021-11-23 13:39:56,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:39:56,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-23 13:39:56,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:39:56,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-23 13:39:56,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=2147, Unknown=0, NotChecked=0, Total=2352 [2021-11-23 13:39:56,040 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 49 states, 45 states have (on average 1.511111111111111) internal successors, (68), 34 states have internal predecessors, (68), 10 states have call successors, (10), 1 states have call predecessors, (10), 13 states have return successors, (15), 15 states have call predecessors, (15), 10 states have call successors, (15) [2021-11-23 13:39:57,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:39:57,625 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2021-11-23 13:39:57,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-23 13:39:57,628 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 45 states have (on average 1.511111111111111) internal successors, (68), 34 states have internal predecessors, (68), 10 states have call successors, (10), 1 states have call predecessors, (10), 13 states have return successors, (15), 15 states have call predecessors, (15), 10 states have call successors, (15) Word has length 41 [2021-11-23 13:39:57,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:39:57,632 INFO L225 Difference]: With dead ends: 59 [2021-11-23 13:39:57,633 INFO L226 Difference]: Without dead ends: 53 [2021-11-23 13:39:57,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1062 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=497, Invalid=3925, Unknown=0, NotChecked=0, Total=4422 [2021-11-23 13:39:57,646 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 37 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 858 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 13:39:57,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 294 Invalid, 903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 858 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 13:39:57,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-23 13:39:57,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 40. [2021-11-23 13:39:57,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 28 states have internal predecessors, (29), 6 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (17), 9 states have call predecessors, (17), 6 states have call successors, (17) [2021-11-23 13:39:57,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 52 transitions. [2021-11-23 13:39:57,670 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 52 transitions. Word has length 41 [2021-11-23 13:39:57,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:39:57,671 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 52 transitions. [2021-11-23 13:39:57,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 45 states have (on average 1.511111111111111) internal successors, (68), 34 states have internal predecessors, (68), 10 states have call successors, (10), 1 states have call predecessors, (10), 13 states have return successors, (15), 15 states have call predecessors, (15), 10 states have call successors, (15) [2021-11-23 13:39:57,672 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 52 transitions. [2021-11-23 13:39:57,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-23 13:39:57,681 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:39:57,682 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:39:57,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 13:39:57,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-23 13:39:57,910 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:39:57,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:39:57,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1241549144, now seen corresponding path program 4 times [2021-11-23 13:39:57,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:39:57,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000227935] [2021-11-23 13:39:57,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:39:57,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:39:57,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:39:57,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-23 13:39:58,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:39:58,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:39:58,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:39:58,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:39:58,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:39:58,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-23 13:39:58,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:39:58,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:39:58,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:39:58,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:39:58,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:39:58,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:39:58,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:39:58,461 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 16 proven. 68 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-23 13:39:58,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:39:58,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000227935] [2021-11-23 13:39:58,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000227935] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:39:58,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741697993] [2021-11-23 13:39:58,461 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 13:39:58,462 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:39:58,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:39:58,466 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:39:58,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 13:39:58,525 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 13:39:58,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:39:58,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 85 conjunts are in the unsatisfiable core [2021-11-23 13:39:58,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:39:59,376 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 3 proven. 61 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-23 13:39:59,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:40:05,215 WARN L838 $PredicateComparison]: unable to prove that (and (<= 0 |c_mult_#in~m|) (forall ((v_mult_~n_BEFORE_CALL_20 Int) (|aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_90_121_145| Int) (|aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_90_121_145| Int) (|aux_div_v_mult_#in~n_BEFORE_CALL_20_90| Int) (|aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_20_90_121| Int)) (let ((.cse3 (* 3 |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_90_121_145|))) (let ((.cse1 (* 3 |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_20_90_121|)) (.cse0 (+ |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_90_121_145| |c_mult_#res| .cse3)) (.cse2 (div (+ (- 1) (* v_mult_~n_BEFORE_CALL_20 2) (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_90_121_145| (- 6)) (* |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_90_121_145| (- 2))) (- 3))) (.cse4 (div (+ (- 1) (* v_mult_~n_BEFORE_CALL_20 (- 2)) (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_90_121_145| 6) (* |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_90_121_145| 2)) 3))) (or (< .cse0 .cse1) (< (+ |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_90_121_145| 1) .cse2) (<= .cse2 (+ |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_20_90_121| 1)) (< (* 3 |aux_div_v_mult_#in~n_BEFORE_CALL_20_90|) (+ |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_90_121_145| .cse3)) (< (+ .cse4 1) |aux_div_v_mult_#in~n_BEFORE_CALL_20_90|) (<= (+ .cse1 3) .cse0) (< |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_90_121_145| 0) (< .cse2 (+ 2 .cse4)))))) (forall ((v_mult_~n_BEFORE_CALL_20 Int) (|aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_90_109_163| Int) (|aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_20_90_109| Int) (|aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_90_109_163| Int) (|aux_div_v_mult_#in~n_BEFORE_CALL_20_90| Int)) (let ((.cse6 (div (+ (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_90_109_163| 6) (- 1) (* v_mult_~n_BEFORE_CALL_20 (- 2)) (* |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_90_109_163| (- 2)) (* |c_mult_#res| (- 2))) 3))) (let ((.cse5 (div (+ (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_90_109_163| (- 6)) (- 1) (* |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_90_109_163| 2) (* v_mult_~n_BEFORE_CALL_20 2) (* |c_mult_#res| 2)) (- 3))) (.cse8 (* 3 |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_90_109_163|)) (.cse7 (+ .cse6 1))) (or (< .cse5 (+ 2 .cse6)) (<= 3 |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_90_109_163|) (<= |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_90_109_163| .cse7) (< (+ |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_90_109_163| |c_mult_#res| (* 3 |aux_div_v_mult_#in~n_BEFORE_CALL_20_90|)) .cse8) (< |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_90_109_163| 0) (< (+ |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_20_90_109| 1) .cse5) (< .cse8 (+ |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_90_109_163| |c_mult_#res| (* 3 |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_20_90_109|))) (< .cse7 |aux_div_v_mult_#in~n_BEFORE_CALL_20_90|))))) (<= |c_mult_#in~m| 0)) is different from false [2021-11-23 13:40:05,984 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 20 proven. 70 refuted. 0 times theorem prover too weak. 23 trivial. 12 not checked. [2021-11-23 13:40:05,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741697993] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:40:05,985 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:40:05,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 16, 25] total 51 [2021-11-23 13:40:05,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661471225] [2021-11-23 13:40:05,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:40:05,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-23 13:40:05,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:40:05,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-23 13:40:05,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=2269, Unknown=1, NotChecked=96, Total=2550 [2021-11-23 13:40:05,991 INFO L87 Difference]: Start difference. First operand 40 states and 52 transitions. Second operand has 51 states, 47 states have (on average 1.4680851063829787) internal successors, (69), 33 states have internal predecessors, (69), 11 states have call successors, (11), 1 states have call predecessors, (11), 14 states have return successors, (19), 18 states have call predecessors, (19), 11 states have call successors, (19) [2021-11-23 13:40:07,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:40:07,965 INFO L93 Difference]: Finished difference Result 70 states and 89 transitions. [2021-11-23 13:40:07,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-23 13:40:07,966 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 47 states have (on average 1.4680851063829787) internal successors, (69), 33 states have internal predecessors, (69), 11 states have call successors, (11), 1 states have call predecessors, (11), 14 states have return successors, (19), 18 states have call predecessors, (19), 11 states have call successors, (19) Word has length 55 [2021-11-23 13:40:07,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:40:07,967 INFO L225 Difference]: With dead ends: 70 [2021-11-23 13:40:07,968 INFO L226 Difference]: Without dead ends: 59 [2021-11-23 13:40:07,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 92 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=539, Invalid=4720, Unknown=1, NotChecked=142, Total=5402 [2021-11-23 13:40:07,972 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 41 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 1009 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 1119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 13:40:07,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 313 Invalid, 1119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1009 Invalid, 0 Unknown, 45 Unchecked, 0.8s Time] [2021-11-23 13:40:07,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-23 13:40:07,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 50. [2021-11-23 13:40:07,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.088235294117647) internal successors, (37), 35 states have internal predecessors, (37), 7 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (21), 11 states have call predecessors, (21), 7 states have call successors, (21) [2021-11-23 13:40:07,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 65 transitions. [2021-11-23 13:40:07,983 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 65 transitions. Word has length 55 [2021-11-23 13:40:07,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:40:07,984 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 65 transitions. [2021-11-23 13:40:07,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 47 states have (on average 1.4680851063829787) internal successors, (69), 33 states have internal predecessors, (69), 11 states have call successors, (11), 1 states have call predecessors, (11), 14 states have return successors, (19), 18 states have call predecessors, (19), 11 states have call successors, (19) [2021-11-23 13:40:07,984 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 65 transitions. [2021-11-23 13:40:07,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-23 13:40:07,987 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:40:07,987 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:40:08,031 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-23 13:40:08,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:40:08,202 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:40:08,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:40:08,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1356577930, now seen corresponding path program 5 times [2021-11-23 13:40:08,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:40:08,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048908563] [2021-11-23 13:40:08,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:40:08,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:40:08,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:40:08,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-23 13:40:08,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:40:08,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:40:08,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:40:08,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:40:08,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:40:08,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:40:08,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:40:08,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-23 13:40:08,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:40:08,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:40:08,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:40:08,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:40:08,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:40:08,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:40:08,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:40:08,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:40:08,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:40:09,023 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 24 proven. 117 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-23 13:40:09,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:40:09,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048908563] [2021-11-23 13:40:09,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048908563] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:40:09,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972088049] [2021-11-23 13:40:09,023 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 13:40:09,023 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:40:09,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:40:09,029 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:40:09,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 13:40:09,089 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-11-23 13:40:09,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:40:09,092 WARN L261 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 109 conjunts are in the unsatisfiable core [2021-11-23 13:40:09,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:40:10,080 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 4 proven. 106 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-23 13:40:10,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:40:29,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972088049] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:40:29,073 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:40:29,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 18] total 40 [2021-11-23 13:40:29,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584170239] [2021-11-23 13:40:29,074 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:40:29,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-23 13:40:29,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:40:29,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-23 13:40:29,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=3427, Unknown=7, NotChecked=0, Total=3660 [2021-11-23 13:40:29,077 INFO L87 Difference]: Start difference. First operand 50 states and 65 transitions. Second operand has 40 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 25 states have internal predecessors, (47), 5 states have call successors, (5), 1 states have call predecessors, (5), 14 states have return successors, (15), 15 states have call predecessors, (15), 5 states have call successors, (15) [2021-11-23 13:40:30,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:40:30,203 INFO L93 Difference]: Finished difference Result 68 states and 90 transitions. [2021-11-23 13:40:30,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-23 13:40:30,204 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 25 states have internal predecessors, (47), 5 states have call successors, (5), 1 states have call predecessors, (5), 14 states have return successors, (15), 15 states have call predecessors, (15), 5 states have call successors, (15) Word has length 69 [2021-11-23 13:40:30,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:40:30,206 INFO L225 Difference]: With dead ends: 68 [2021-11-23 13:40:30,206 INFO L226 Difference]: Without dead ends: 62 [2021-11-23 13:40:30,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 101 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=439, Invalid=4956, Unknown=7, NotChecked=0, Total=5402 [2021-11-23 13:40:30,208 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 23 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 807 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 13:40:30,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 371 Invalid, 824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 807 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 13:40:30,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-23 13:40:30,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2021-11-23 13:40:30,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 38 states have internal predecessors, (40), 8 states have call successors, (8), 3 states have call predecessors, (8), 9 states have return successors, (27), 13 states have call predecessors, (27), 8 states have call successors, (27) [2021-11-23 13:40:30,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 75 transitions. [2021-11-23 13:40:30,220 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 75 transitions. Word has length 69 [2021-11-23 13:40:30,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:40:30,221 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 75 transitions. [2021-11-23 13:40:30,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 25 states have internal predecessors, (47), 5 states have call successors, (5), 1 states have call predecessors, (5), 14 states have return successors, (15), 15 states have call predecessors, (15), 5 states have call successors, (15) [2021-11-23 13:40:30,222 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 75 transitions. [2021-11-23 13:40:30,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-23 13:40:30,223 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:40:30,223 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:40:30,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 13:40:30,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:40:30,438 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:40:30,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:40:30,439 INFO L85 PathProgramCache]: Analyzing trace with hash -900801010, now seen corresponding path program 6 times [2021-11-23 13:40:30,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:40:30,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258618501] [2021-11-23 13:40:30,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:40:30,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:40:30,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:40:30,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-23 13:40:30,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:40:30,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:40:30,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:40:30,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:40:30,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:40:30,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:40:30,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:40:30,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-23 13:40:30,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:40:30,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:40:30,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:40:30,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:40:30,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:40:31,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:40:31,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:40:31,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:40:31,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:40:31,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:40:31,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:40:31,288 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 28 proven. 146 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-11-23 13:40:31,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:40:31,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258618501] [2021-11-23 13:40:31,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258618501] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:40:31,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886651958] [2021-11-23 13:40:31,289 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 13:40:31,289 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:40:31,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:40:31,290 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:40:31,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 13:40:31,381 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-11-23 13:40:31,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:40:31,385 WARN L261 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 121 conjunts are in the unsatisfiable core [2021-11-23 13:40:31,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:40:32,646 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 5 proven. 134 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-11-23 13:40:32,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:40:50,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886651958] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:40:50,991 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:40:50,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 20] total 44 [2021-11-23 13:40:50,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192424263] [2021-11-23 13:40:50,992 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:40:50,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-23 13:40:50,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:40:50,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-23 13:40:50,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=4167, Unknown=7, NotChecked=0, Total=4422 [2021-11-23 13:40:50,995 INFO L87 Difference]: Start difference. First operand 55 states and 75 transitions. Second operand has 44 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 27 states have internal predecessors, (51), 5 states have call successors, (5), 1 states have call predecessors, (5), 16 states have return successors, (17), 17 states have call predecessors, (17), 5 states have call successors, (17) [2021-11-23 13:40:52,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:40:52,096 INFO L93 Difference]: Finished difference Result 72 states and 97 transitions. [2021-11-23 13:40:52,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-23 13:40:52,097 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 27 states have internal predecessors, (51), 5 states have call successors, (5), 1 states have call predecessors, (5), 16 states have return successors, (17), 17 states have call predecessors, (17), 5 states have call successors, (17) Word has length 76 [2021-11-23 13:40:52,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:40:52,099 INFO L225 Difference]: With dead ends: 72 [2021-11-23 13:40:52,099 INFO L226 Difference]: Without dead ends: 68 [2021-11-23 13:40:52,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 113 SyntacticMatches, 3 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1293 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=497, Invalid=5816, Unknown=7, NotChecked=0, Total=6320 [2021-11-23 13:40:52,102 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 35 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 948 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 13:40:52,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 447 Invalid, 978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 948 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 13:40:52,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-23 13:40:52,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 58. [2021-11-23 13:40:52,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 40 states have internal predecessors, (42), 8 states have call successors, (8), 3 states have call predecessors, (8), 10 states have return successors, (32), 14 states have call predecessors, (32), 8 states have call successors, (32) [2021-11-23 13:40:52,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 82 transitions. [2021-11-23 13:40:52,117 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 82 transitions. Word has length 76 [2021-11-23 13:40:52,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:40:52,118 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 82 transitions. [2021-11-23 13:40:52,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 27 states have internal predecessors, (51), 5 states have call successors, (5), 1 states have call predecessors, (5), 16 states have return successors, (17), 17 states have call predecessors, (17), 5 states have call successors, (17) [2021-11-23 13:40:52,119 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 82 transitions. [2021-11-23 13:40:52,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-23 13:40:52,120 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:40:52,120 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:40:52,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 13:40:52,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:40:52,326 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:40:52,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:40:52,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1272279482, now seen corresponding path program 7 times [2021-11-23 13:40:52,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:40:52,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000420999] [2021-11-23 13:40:52,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:40:52,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:40:52,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:40:52,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-23 13:40:52,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:40:52,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:40:52,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:40:52,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:40:52,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:40:52,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:40:52,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:40:52,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-23 13:40:52,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:40:52,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:40:52,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:40:52,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:40:52,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:40:52,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:40:52,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:40:53,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:40:53,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:40:53,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:40:53,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:40:53,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:40:53,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:40:53,294 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 32 proven. 178 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-11-23 13:40:53,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:40:53,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000420999] [2021-11-23 13:40:53,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000420999] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:40:53,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858977173] [2021-11-23 13:40:53,295 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 13:40:53,295 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:40:53,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:40:53,298 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:40:53,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 13:40:53,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:40:53,380 WARN L261 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 133 conjunts are in the unsatisfiable core [2021-11-23 13:40:53,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:40:54,627 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 6 proven. 165 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-11-23 13:40:54,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:41:14,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858977173] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:41:14,500 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:41:14,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 22] total 48 [2021-11-23 13:41:14,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099630776] [2021-11-23 13:41:14,501 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:41:14,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-23 13:41:14,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:41:14,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-23 13:41:14,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=4979, Unknown=7, NotChecked=0, Total=5256 [2021-11-23 13:41:14,504 INFO L87 Difference]: Start difference. First operand 58 states and 82 transitions. Second operand has 48 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 29 states have internal predecessors, (55), 5 states have call successors, (5), 1 states have call predecessors, (5), 18 states have return successors, (19), 19 states have call predecessors, (19), 5 states have call successors, (19) [2021-11-23 13:41:15,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:41:15,980 INFO L93 Difference]: Finished difference Result 78 states and 108 transitions. [2021-11-23 13:41:15,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-23 13:41:15,980 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 29 states have internal predecessors, (55), 5 states have call successors, (5), 1 states have call predecessors, (5), 18 states have return successors, (19), 19 states have call predecessors, (19), 5 states have call successors, (19) Word has length 83 [2021-11-23 13:41:15,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:41:15,982 INFO L225 Difference]: With dead ends: 78 [2021-11-23 13:41:15,982 INFO L226 Difference]: Without dead ends: 74 [2021-11-23 13:41:15,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 125 SyntacticMatches, 3 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1570 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=573, Invalid=7076, Unknown=7, NotChecked=0, Total=7656 [2021-11-23 13:41:15,985 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 22 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 1032 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 1039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 13:41:15,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 477 Invalid, 1039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1032 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 13:41:15,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-23 13:41:15,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 61. [2021-11-23 13:41:16,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 42 states have internal predecessors, (44), 8 states have call successors, (8), 3 states have call predecessors, (8), 11 states have return successors, (37), 15 states have call predecessors, (37), 8 states have call successors, (37) [2021-11-23 13:41:16,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 89 transitions. [2021-11-23 13:41:16,008 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 89 transitions. Word has length 83 [2021-11-23 13:41:16,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:41:16,009 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 89 transitions. [2021-11-23 13:41:16,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 29 states have internal predecessors, (55), 5 states have call successors, (5), 1 states have call predecessors, (5), 18 states have return successors, (19), 19 states have call predecessors, (19), 5 states have call successors, (19) [2021-11-23 13:41:16,010 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 89 transitions. [2021-11-23 13:41:16,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-23 13:41:16,015 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:41:16,015 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:41:16,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 13:41:16,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-23 13:41:16,234 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:41:16,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:41:16,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1915241724, now seen corresponding path program 8 times [2021-11-23 13:41:16,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:41:16,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092969113] [2021-11-23 13:41:16,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:41:16,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:41:16,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:41:16,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-23 13:41:16,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:41:16,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:41:16,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:41:16,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:41:16,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:41:16,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:41:16,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:41:16,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:41:16,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:41:16,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-23 13:41:16,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:41:16,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:41:16,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:41:16,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:41:16,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:41:16,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:41:16,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:41:17,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:41:17,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:41:17,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:41:17,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:41:17,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:41:17,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:41:17,297 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 36 proven. 213 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2021-11-23 13:41:17,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:41:17,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092969113] [2021-11-23 13:41:17,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092969113] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:41:17,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934039515] [2021-11-23 13:41:17,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 13:41:17,297 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:41:17,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:41:17,302 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:41:17,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 13:41:17,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 13:41:17,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:41:17,394 WARN L261 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 145 conjunts are in the unsatisfiable core [2021-11-23 13:41:17,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:41:18,629 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 6 proven. 197 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2021-11-23 13:41:18,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:41:39,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934039515] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:41:39,450 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:41:39,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 22] total 50 [2021-11-23 13:41:39,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707037582] [2021-11-23 13:41:39,450 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:41:39,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-23 13:41:39,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:41:39,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-23 13:41:39,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=5265, Unknown=7, NotChecked=0, Total=5550 [2021-11-23 13:41:39,454 INFO L87 Difference]: Start difference. First operand 61 states and 89 transitions. Second operand has 50 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 30 states have internal predecessors, (57), 5 states have call successors, (5), 1 states have call predecessors, (5), 19 states have return successors, (20), 20 states have call predecessors, (20), 5 states have call successors, (20) [2021-11-23 13:41:41,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:41:41,087 INFO L93 Difference]: Finished difference Result 82 states and 117 transitions. [2021-11-23 13:41:41,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-23 13:41:41,087 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 30 states have internal predecessors, (57), 5 states have call successors, (5), 1 states have call predecessors, (5), 19 states have return successors, (20), 20 states have call predecessors, (20), 5 states have call successors, (20) Word has length 90 [2021-11-23 13:41:41,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:41:41,088 INFO L225 Difference]: With dead ends: 82 [2021-11-23 13:41:41,089 INFO L226 Difference]: Without dead ends: 76 [2021-11-23 13:41:41,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 134 SyntacticMatches, 3 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1645 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=597, Invalid=7768, Unknown=7, NotChecked=0, Total=8372 [2021-11-23 13:41:41,092 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 25 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 1440 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 1465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 13:41:41,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 581 Invalid, 1465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1440 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-23 13:41:41,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-23 13:41:41,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 61. [2021-11-23 13:41:41,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 42 states have internal predecessors, (44), 8 states have call successors, (8), 3 states have call predecessors, (8), 11 states have return successors, (37), 15 states have call predecessors, (37), 8 states have call successors, (37) [2021-11-23 13:41:41,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 89 transitions. [2021-11-23 13:41:41,105 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 89 transitions. Word has length 90 [2021-11-23 13:41:41,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:41:41,106 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 89 transitions. [2021-11-23 13:41:41,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 30 states have internal predecessors, (57), 5 states have call successors, (5), 1 states have call predecessors, (5), 19 states have return successors, (20), 20 states have call predecessors, (20), 5 states have call successors, (20) [2021-11-23 13:41:41,106 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 89 transitions. [2021-11-23 13:41:41,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-23 13:41:41,108 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:41:41,108 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:41:41,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 13:41:41,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:41:41,334 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:41:41,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:41:41,334 INFO L85 PathProgramCache]: Analyzing trace with hash -388290116, now seen corresponding path program 9 times [2021-11-23 13:41:41,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:41:41,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318498693] [2021-11-23 13:41:41,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:41:41,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:41:41,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:41:41,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-23 13:41:41,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:41:41,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:41:41,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:41:41,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:41:41,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:41:41,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-23 13:41:41,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:41:41,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:41:41,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:41:41,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:41:41,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:41:41,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:41:41,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:41:41,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:41:41,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:41:42,002 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 20 proven. 91 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-23 13:41:42,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:41:42,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318498693] [2021-11-23 13:41:42,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318498693] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:41:42,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848607946] [2021-11-23 13:41:42,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 13:41:42,003 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:41:42,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:41:42,004 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:41:42,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 13:41:42,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-23 13:41:42,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:41:42,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 97 conjunts are in the unsatisfiable core [2021-11-23 13:41:42,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:41:42,711 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 9 proven. 79 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-23 13:41:42,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:41:47,646 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_95_78_121_141| Int) (|aux_div_v_mult_#in~n_BEFORE_CALL_95_78| Int) (|aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_95_78_121| Int) (|aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_95_78_121_141| Int) (v_mult_~n_BEFORE_CALL_95 Int)) (let ((.cse4 (* 4 |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_95_78_121_141|))) (let ((.cse0 (div (+ (* v_mult_~n_BEFORE_CALL_95 2) (- 1) (* |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_95_78_121_141| 2) (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_95_78_121_141| (- 8))) (- 4))) (.cse1 (div (+ (- 1) (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_95_78_121_141| 8) (* v_mult_~n_BEFORE_CALL_95 (- 2)) (* |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_95_78_121_141| (- 2))) 4)) (.cse3 (+ |c_mult_#res| .cse4)) (.cse2 (* 4 |aux_div_v_mult_#in~n_BEFORE_CALL_95_78|))) (or (< (+ |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_95_78_121| 1) .cse0) (< .cse0 (+ 2 .cse1)) (< |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_95_78_121_141| 0) (<= (+ |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_95_78_121_141| .cse2 4) .cse3) (<= .cse0 (+ |aux_div_v_mult_#in~n_BEFORE_CALL_95_78| 1)) (< .cse4 (+ (* 4 |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_95_78_121|) |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_95_78_121_141|)) (< (+ .cse1 1) |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_95_78_121_141|) (< .cse3 (+ |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_95_78_121_141| .cse2)))))) (= |c_mult_#in~m| 0) (forall ((|aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_95_112_121_135| Int) (|aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_95_112_121| Int) (|aux_div_v_mult_#in~n_BEFORE_CALL_95_112| Int) (|aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_95_112_121_135| Int) (v_mult_~n_BEFORE_CALL_95 Int)) (let ((.cse7 (div (+ (- 1) (* |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_95_112_121_135| 2) (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_95_112_121_135| 8) (* v_mult_~n_BEFORE_CALL_95 (- 2))) 4))) (let ((.cse5 (+ .cse7 1)) (.cse6 (div (+ (* v_mult_~n_BEFORE_CALL_95 2) (- 1) (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_95_112_121_135| (- 8)) (* |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_95_112_121_135| (- 2))) (- 4))) (.cse8 (* 4 |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_95_112_121_135|)) (.cse9 (* 4 |aux_div_v_mult_#in~n_BEFORE_CALL_95_112|))) (or (< .cse5 |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_95_112_121|) (< .cse6 (+ 2 .cse7)) (<= |aux_div_v_mult_#in~n_BEFORE_CALL_95_112| .cse5) (< |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_95_112_121_135| 0) (< (+ |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_95_112_121_135| 1) .cse6) (< (* 4 |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_95_112_121|) (+ |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_95_112_121_135| .cse8)) (< .cse9 (+ |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_95_112_121_135| |c_mult_#res| .cse8)) (<= (+ |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_95_112_121_135| |c_mult_#res| 4 .cse8) .cse9)))))) is different from false [2021-11-23 13:41:48,111 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 24 proven. 103 refuted. 0 times theorem prover too weak. 29 trivial. 14 not checked. [2021-11-23 13:41:48,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848607946] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:41:48,111 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:41:48,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 18, 28] total 57 [2021-11-23 13:41:48,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561756745] [2021-11-23 13:41:48,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:41:48,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-11-23 13:41:48,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:41:48,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-11-23 13:41:48,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=2877, Unknown=1, NotChecked=108, Total=3192 [2021-11-23 13:41:48,113 INFO L87 Difference]: Start difference. First operand 61 states and 89 transitions. Second operand has 57 states, 53 states have (on average 1.490566037735849) internal successors, (79), 36 states have internal predecessors, (79), 12 states have call successors, (12), 1 states have call predecessors, (12), 16 states have return successors, (22), 21 states have call predecessors, (22), 12 states have call successors, (22) [2021-11-23 13:41:50,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:41:50,970 INFO L93 Difference]: Finished difference Result 82 states and 108 transitions. [2021-11-23 13:41:50,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-23 13:41:50,971 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 53 states have (on average 1.490566037735849) internal successors, (79), 36 states have internal predecessors, (79), 12 states have call successors, (12), 1 states have call predecessors, (12), 16 states have return successors, (22), 21 states have call predecessors, (22), 12 states have call successors, (22) Word has length 62 [2021-11-23 13:41:50,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:41:50,972 INFO L225 Difference]: With dead ends: 82 [2021-11-23 13:41:50,972 INFO L226 Difference]: Without dead ends: 75 [2021-11-23 13:41:50,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 98 SyntacticMatches, 9 SemanticMatches, 76 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1350 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=542, Invalid=5313, Unknown=1, NotChecked=150, Total=6006 [2021-11-23 13:41:50,974 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 42 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 1183 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 1277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 13:41:50,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 390 Invalid, 1277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1183 Invalid, 0 Unknown, 40 Unchecked, 0.7s Time] [2021-11-23 13:41:50,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-23 13:41:50,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 64. [2021-11-23 13:41:50,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 43 states have (on average 1.069767441860465) internal successors, (46), 44 states have internal predecessors, (46), 8 states have call successors, (8), 3 states have call predecessors, (8), 12 states have return successors, (35), 16 states have call predecessors, (35), 8 states have call successors, (35) [2021-11-23 13:41:50,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 89 transitions. [2021-11-23 13:41:50,986 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 89 transitions. Word has length 62 [2021-11-23 13:41:50,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:41:50,987 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 89 transitions. [2021-11-23 13:41:50,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 53 states have (on average 1.490566037735849) internal successors, (79), 36 states have internal predecessors, (79), 12 states have call successors, (12), 1 states have call predecessors, (12), 16 states have return successors, (22), 21 states have call predecessors, (22), 12 states have call successors, (22) [2021-11-23 13:41:50,987 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 89 transitions. [2021-11-23 13:41:50,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-23 13:41:50,988 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:41:50,989 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:41:51,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 13:41:51,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:41:51,202 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:41:51,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:41:51,202 INFO L85 PathProgramCache]: Analyzing trace with hash 230391048, now seen corresponding path program 10 times [2021-11-23 13:41:51,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:41:51,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039218243] [2021-11-23 13:41:51,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:41:51,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:41:51,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:41:51,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-23 13:41:51,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:41:51,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:41:51,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:41:51,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:41:51,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:41:51,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-23 13:41:51,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:41:51,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:41:51,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:41:51,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:41:51,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:41:51,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:41:51,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:41:51,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:41:51,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:41:51,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:41:51,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:41:51,974 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 24 proven. 117 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-23 13:41:51,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:41:51,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039218243] [2021-11-23 13:41:51,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039218243] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:41:51,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126805967] [2021-11-23 13:41:51,975 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 13:41:51,975 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:41:51,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:41:51,976 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:41:51,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 13:41:52,061 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 13:41:52,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:41:52,063 WARN L261 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 109 conjunts are in the unsatisfiable core [2021-11-23 13:41:52,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:41:52,997 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 5 proven. 108 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-23 13:41:52,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:41:58,933 WARN L838 $PredicateComparison]: unable to prove that (and (<= 0 |c_mult_#in~m|) (<= |c_mult_#in~m| 0) (forall ((|aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_109_92_131| Int) (|aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_109_92_131_157| Int) (v_mult_~n_BEFORE_CALL_109 Int) (|aux_div_v_mult_#in~n_BEFORE_CALL_109_92| Int) (|aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_109_92_131_157| Int)) (let ((.cse3 (div (+ (- 1) (* |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_109_92_131_157| 2) (* v_mult_~n_BEFORE_CALL_109 (- 2)) (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_109_92_131_157| 10)) 5))) (let ((.cse0 (+ .cse3 1)) (.cse2 (div (+ (- 1) (* v_mult_~n_BEFORE_CALL_109 2) (* |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_109_92_131_157| (- 2)) (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_109_92_131_157| (- 10))) (- 5))) (.cse1 (* 5 |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_109_92_131_157|)) (.cse4 (* 5 |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_109_92_131|))) (or (< .cse0 |aux_div_v_mult_#in~n_BEFORE_CALL_109_92|) (< (* 5 |aux_div_v_mult_#in~n_BEFORE_CALL_109_92|) (+ .cse1 |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_109_92_131_157|)) (< |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_109_92_131_157| 0) (< (+ |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_109_92_131_157| 1) .cse2) (<= |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_109_92_131| .cse0) (< .cse2 (+ 2 .cse3)) (< .cse4 (+ .cse1 |c_mult_#res| |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_109_92_131_157|)) (<= (+ .cse1 |c_mult_#res| 5 |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_109_92_131_157|) .cse4))))) (forall ((|aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_109_92_123| Int) (v_mult_~n_BEFORE_CALL_109 Int) (|aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_109_92_123_147| Int) (|aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_109_92_123_147| Int) (|aux_div_v_mult_#in~n_BEFORE_CALL_109_92| Int)) (let ((.cse9 (* 5 |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_109_92_123_147|))) (let ((.cse8 (div (+ (- 1) (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_109_92_123_147| (- 10)) (* |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_109_92_123_147| (- 2)) (* v_mult_~n_BEFORE_CALL_109 2)) (- 5))) (.cse7 (div (+ (- 1) (* |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_109_92_123_147| 2) (* v_mult_~n_BEFORE_CALL_109 (- 2)) (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_109_92_123_147| 10)) 5)) (.cse6 (+ |c_mult_#res| |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_109_92_123_147| .cse9)) (.cse5 (* 5 |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_109_92_123|))) (or (<= (+ 5 .cse5) .cse6) (< (+ .cse7 1) |aux_div_v_mult_#in~n_BEFORE_CALL_109_92|) (< (+ |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_109_92_123_147| 1) .cse8) (< |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_109_92_123_147| 0) (< (* 5 |aux_div_v_mult_#in~n_BEFORE_CALL_109_92|) (+ |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_109_92_123_147| .cse9)) (<= .cse8 (+ |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_109_92_123| 1)) (< .cse8 (+ .cse7 2)) (< .cse6 .cse5)))))) is different from false [2021-11-23 13:41:59,519 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 26 proven. 142 refuted. 0 times theorem prover too weak. 38 trivial. 16 not checked. [2021-11-23 13:41:59,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126805967] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:41:59,520 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:41:59,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 20, 31] total 63 [2021-11-23 13:41:59,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000763743] [2021-11-23 13:41:59,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:41:59,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-23 13:41:59,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:41:59,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-23 13:41:59,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=3557, Unknown=1, NotChecked=120, Total=3906 [2021-11-23 13:41:59,522 INFO L87 Difference]: Start difference. First operand 64 states and 89 transitions. Second operand has 63 states, 59 states have (on average 1.4406779661016949) internal successors, (85), 39 states have internal predecessors, (85), 13 states have call successors, (13), 1 states have call predecessors, (13), 18 states have return successors, (25), 24 states have call predecessors, (25), 13 states have call successors, (25) [2021-11-23 13:42:03,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:42:03,518 INFO L93 Difference]: Finished difference Result 84 states and 107 transitions. [2021-11-23 13:42:03,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-23 13:42:03,518 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 59 states have (on average 1.4406779661016949) internal successors, (85), 39 states have internal predecessors, (85), 13 states have call successors, (13), 1 states have call predecessors, (13), 18 states have return successors, (25), 24 states have call predecessors, (25), 13 states have call successors, (25) Word has length 69 [2021-11-23 13:42:03,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:42:03,520 INFO L225 Difference]: With dead ends: 84 [2021-11-23 13:42:03,520 INFO L226 Difference]: Without dead ends: 77 [2021-11-23 13:42:03,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 116 SyntacticMatches, 3 SemanticMatches, 84 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1498 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=622, Invalid=6521, Unknown=1, NotChecked=166, Total=7310 [2021-11-23 13:42:03,522 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 55 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 1454 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 1583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-23 13:42:03,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 524 Invalid, 1583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1454 Invalid, 0 Unknown, 47 Unchecked, 0.9s Time] [2021-11-23 13:42:03,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-23 13:42:03,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 67. [2021-11-23 13:42:03,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 46 states have internal predecessors, (48), 8 states have call successors, (8), 3 states have call predecessors, (8), 13 states have return successors, (33), 17 states have call predecessors, (33), 8 states have call successors, (33) [2021-11-23 13:42:03,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 89 transitions. [2021-11-23 13:42:03,533 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 89 transitions. Word has length 69 [2021-11-23 13:42:03,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:42:03,534 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 89 transitions. [2021-11-23 13:42:03,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 59 states have (on average 1.4406779661016949) internal successors, (85), 39 states have internal predecessors, (85), 13 states have call successors, (13), 1 states have call predecessors, (13), 18 states have return successors, (25), 24 states have call predecessors, (25), 13 states have call successors, (25) [2021-11-23 13:42:03,534 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 89 transitions. [2021-11-23 13:42:03,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-23 13:42:03,536 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:42:03,536 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:42:03,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-23 13:42:03,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:42:03,753 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:42:03,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:42:03,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1792410124, now seen corresponding path program 11 times [2021-11-23 13:42:03,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:42:03,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403088276] [2021-11-23 13:42:03,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:42:03,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:42:03,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:42:03,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-23 13:42:03,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:42:03,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:42:03,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:42:03,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:42:03,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:42:03,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-23 13:42:03,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:42:04,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:42:04,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:42:04,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:42:04,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:42:04,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:42:04,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:42:04,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:42:04,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:42:04,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:42:04,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:42:04,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:42:04,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:42:04,525 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 28 proven. 146 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-11-23 13:42:04,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:42:04,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403088276] [2021-11-23 13:42:04,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403088276] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:42:04,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890420911] [2021-11-23 13:42:04,526 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 13:42:04,526 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:42:04,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:42:04,528 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:42:04,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-23 13:42:04,642 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-11-23 13:42:04,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:42:04,645 WARN L261 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 121 conjunts are in the unsatisfiable core [2021-11-23 13:42:04,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:42:05,771 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 6 proven. 136 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-11-23 13:42:05,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:42:09,584 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 29 proven. 203 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-23 13:42:09,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890420911] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:42:09,584 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:42:09,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 22, 33] total 68 [2021-11-23 13:42:09,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63954219] [2021-11-23 13:42:09,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:42:09,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-11-23 13:42:09,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:42:09,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-11-23 13:42:09,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=4308, Unknown=0, NotChecked=0, Total=4556 [2021-11-23 13:42:09,589 INFO L87 Difference]: Start difference. First operand 67 states and 89 transitions. Second operand has 68 states, 64 states have (on average 1.421875) internal successors, (91), 41 states have internal predecessors, (91), 14 states have call successors, (14), 1 states have call predecessors, (14), 19 states have return successors, (28), 27 states have call predecessors, (28), 14 states have call successors, (28) [2021-11-23 13:42:12,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:42:12,025 INFO L93 Difference]: Finished difference Result 86 states and 106 transitions. [2021-11-23 13:42:12,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-23 13:42:12,026 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 64 states have (on average 1.421875) internal successors, (91), 41 states have internal predecessors, (91), 14 states have call successors, (14), 1 states have call predecessors, (14), 19 states have return successors, (28), 27 states have call predecessors, (28), 14 states have call successors, (28) Word has length 76 [2021-11-23 13:42:12,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:42:12,027 INFO L225 Difference]: With dead ends: 86 [2021-11-23 13:42:12,027 INFO L226 Difference]: Without dead ends: 79 [2021-11-23 13:42:12,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 128 SyntacticMatches, 4 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1838 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=704, Invalid=7852, Unknown=0, NotChecked=0, Total=8556 [2021-11-23 13:42:12,028 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 50 mSDsluCounter, 685 mSDsCounter, 0 mSdLazyCounter, 2026 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 708 SdHoareTripleChecker+Invalid, 2069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 2026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-23 13:42:12,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 708 Invalid, 2069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 2026 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-23 13:42:12,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-23 13:42:12,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 70. [2021-11-23 13:42:12,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 48 states have internal predecessors, (50), 8 states have call successors, (8), 3 states have call predecessors, (8), 14 states have return successors, (31), 18 states have call predecessors, (31), 8 states have call successors, (31) [2021-11-23 13:42:12,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 89 transitions. [2021-11-23 13:42:12,038 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 89 transitions. Word has length 76 [2021-11-23 13:42:12,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:42:12,038 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 89 transitions. [2021-11-23 13:42:12,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 64 states have (on average 1.421875) internal successors, (91), 41 states have internal predecessors, (91), 14 states have call successors, (14), 1 states have call predecessors, (14), 19 states have return successors, (28), 27 states have call predecessors, (28), 14 states have call successors, (28) [2021-11-23 13:42:12,039 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 89 transitions. [2021-11-23 13:42:12,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-23 13:42:12,040 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:42:12,040 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:42:12,075 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-11-23 13:42:12,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-23 13:42:12,254 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:42:12,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:42:12,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1119099064, now seen corresponding path program 12 times [2021-11-23 13:42:12,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:42:12,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937821214] [2021-11-23 13:42:12,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:42:12,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:42:12,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:42:12,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-23 13:42:12,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:42:12,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:42:12,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:42:12,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:42:12,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:42:12,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-23 13:42:12,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:42:12,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:42:12,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:42:12,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:42:12,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:42:12,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:42:12,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:42:12,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:42:12,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:42:12,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:42:12,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:42:13,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:42:13,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:42:13,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:42:13,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:42:13,207 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 32 proven. 178 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-11-23 13:42:13,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:42:13,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937821214] [2021-11-23 13:42:13,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937821214] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:42:13,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730659208] [2021-11-23 13:42:13,208 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 13:42:13,208 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:42:13,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:42:13,209 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:42:13,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-23 13:42:13,306 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-11-23 13:42:13,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:42:13,309 WARN L261 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 133 conjunts are in the unsatisfiable core [2021-11-23 13:42:13,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:42:14,510 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 7 proven. 167 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2021-11-23 13:42:14,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:42:18,986 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 32 proven. 256 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-23 13:42:18,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730659208] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:42:18,987 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:42:18,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 24, 36] total 74 [2021-11-23 13:42:18,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70883907] [2021-11-23 13:42:18,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:42:18,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-11-23 13:42:18,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:42:18,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-11-23 13:42:18,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=5132, Unknown=0, NotChecked=0, Total=5402 [2021-11-23 13:42:18,990 INFO L87 Difference]: Start difference. First operand 70 states and 89 transitions. Second operand has 74 states, 70 states have (on average 1.4142857142857144) internal successors, (99), 44 states have internal predecessors, (99), 15 states have call successors, (15), 1 states have call predecessors, (15), 21 states have return successors, (31), 30 states have call predecessors, (31), 15 states have call successors, (31) [2021-11-23 13:42:21,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:42:21,602 INFO L93 Difference]: Finished difference Result 92 states and 114 transitions. [2021-11-23 13:42:21,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-23 13:42:21,602 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 70 states have (on average 1.4142857142857144) internal successors, (99), 44 states have internal predecessors, (99), 15 states have call successors, (15), 1 states have call predecessors, (15), 21 states have return successors, (31), 30 states have call predecessors, (31), 15 states have call successors, (31) Word has length 83 [2021-11-23 13:42:21,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:42:21,603 INFO L225 Difference]: With dead ends: 92 [2021-11-23 13:42:21,603 INFO L226 Difference]: Without dead ends: 85 [2021-11-23 13:42:21,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 140 SyntacticMatches, 4 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2171 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=792, Invalid=9308, Unknown=0, NotChecked=0, Total=10100 [2021-11-23 13:42:21,606 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 83 mSDsluCounter, 759 mSDsCounter, 0 mSdLazyCounter, 2335 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 783 SdHoareTripleChecker+Invalid, 2471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 2335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-23 13:42:21,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 783 Invalid, 2471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 2335 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-23 13:42:21,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-11-23 13:42:21,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 76. [2021-11-23 13:42:21,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 52 states have internal predecessors, (54), 8 states have call successors, (8), 3 states have call predecessors, (8), 16 states have return successors, (34), 20 states have call predecessors, (34), 8 states have call successors, (34) [2021-11-23 13:42:21,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 96 transitions. [2021-11-23 13:42:21,616 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 96 transitions. Word has length 83 [2021-11-23 13:42:21,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:42:21,617 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 96 transitions. [2021-11-23 13:42:21,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 70 states have (on average 1.4142857142857144) internal successors, (99), 44 states have internal predecessors, (99), 15 states have call successors, (15), 1 states have call predecessors, (15), 21 states have return successors, (31), 30 states have call predecessors, (31), 15 states have call successors, (31) [2021-11-23 13:42:21,617 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 96 transitions. [2021-11-23 13:42:21,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-23 13:42:21,619 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:42:21,619 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:42:21,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-23 13:42:21,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-23 13:42:21,833 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:42:21,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:42:21,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1145702838, now seen corresponding path program 13 times [2021-11-23 13:42:21,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:42:21,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796281149] [2021-11-23 13:42:21,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:42:21,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:42:21,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:42:21,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-23 13:42:21,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:42:21,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:42:21,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:42:22,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:42:22,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:42:22,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:42:22,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:42:22,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:42:22,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:42:22,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:42:22,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:42:22,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-23 13:42:22,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:42:22,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:42:22,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:42:22,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:42:22,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:42:22,552 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 22 proven. 119 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-23 13:42:22,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:42:22,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796281149] [2021-11-23 13:42:22,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796281149] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:42:22,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215948338] [2021-11-23 13:42:22,553 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 13:42:22,553 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:42:22,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:42:22,554 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:42:22,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-23 13:42:22,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:42:22,645 WARN L261 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 109 conjunts are in the unsatisfiable core [2021-11-23 13:42:22,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:42:23,539 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 2 proven. 111 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-23 13:42:23,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:42:44,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215948338] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:42:44,573 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:42:44,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 20] total 42 [2021-11-23 13:42:44,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011791414] [2021-11-23 13:42:44,573 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:42:44,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-23 13:42:44,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:42:44,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-23 13:42:44,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=3203, Unknown=8, NotChecked=0, Total=3422 [2021-11-23 13:42:44,575 INFO L87 Difference]: Start difference. First operand 76 states and 96 transitions. Second operand has 42 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 26 states have internal predecessors, (49), 5 states have call successors, (5), 1 states have call predecessors, (5), 15 states have return successors, (16), 16 states have call predecessors, (16), 5 states have call successors, (16) [2021-11-23 13:42:45,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:42:45,614 INFO L93 Difference]: Finished difference Result 88 states and 109 transitions. [2021-11-23 13:42:45,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-23 13:42:45,614 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 26 states have internal predecessors, (49), 5 states have call successors, (5), 1 states have call predecessors, (5), 15 states have return successors, (16), 16 states have call predecessors, (16), 5 states have call successors, (16) Word has length 69 [2021-11-23 13:42:45,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:42:45,615 INFO L225 Difference]: With dead ends: 88 [2021-11-23 13:42:45,615 INFO L226 Difference]: Without dead ends: 82 [2021-11-23 13:42:45,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 89 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1101 ImplicationChecksByTransitivity, 19.9s TimeCoverageRelationStatistics Valid=436, Invalid=4958, Unknown=8, NotChecked=0, Total=5402 [2021-11-23 13:42:45,617 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 35 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 13:42:45,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 418 Invalid, 884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 853 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 13:42:45,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-23 13:42:45,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 76. [2021-11-23 13:42:45,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 52 states have internal predecessors, (54), 8 states have call successors, (8), 3 states have call predecessors, (8), 16 states have return successors, (34), 20 states have call predecessors, (34), 8 states have call successors, (34) [2021-11-23 13:42:45,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 96 transitions. [2021-11-23 13:42:45,626 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 96 transitions. Word has length 69 [2021-11-23 13:42:45,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:42:45,626 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 96 transitions. [2021-11-23 13:42:45,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 26 states have internal predecessors, (49), 5 states have call successors, (5), 1 states have call predecessors, (5), 15 states have return successors, (16), 16 states have call predecessors, (16), 5 states have call successors, (16) [2021-11-23 13:42:45,627 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 96 transitions. [2021-11-23 13:42:45,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-23 13:42:45,628 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:42:45,629 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:42:45,656 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-11-23 13:42:45,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-23 13:42:45,842 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:42:45,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:42:45,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1358540522, now seen corresponding path program 14 times [2021-11-23 13:42:45,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:42:45,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427452618] [2021-11-23 13:42:45,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:42:45,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:42:45,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:42:45,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-23 13:42:45,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:42:45,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:42:45,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:42:46,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:42:46,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:42:46,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:42:46,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:42:46,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-23 13:42:46,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:42:46,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:42:46,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:42:46,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:42:46,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:42:46,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:42:46,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:42:46,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:42:46,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:42:46,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:42:46,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:42:46,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:42:46,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:42:46,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:42:46,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:42:46,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:42:46,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:42:47,027 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 40 proven. 251 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2021-11-23 13:42:47,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:42:47,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427452618] [2021-11-23 13:42:47,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427452618] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:42:47,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50301016] [2021-11-23 13:42:47,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 13:42:47,028 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:42:47,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:42:47,030 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:42:47,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-23 13:42:47,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 13:42:47,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:42:47,146 WARN L261 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 157 conjunts are in the unsatisfiable core [2021-11-23 13:42:47,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:42:48,695 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 8 proven. 236 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-11-23 13:42:48,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:43:10,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50301016] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:43:10,058 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:43:10,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 26] total 56 [2021-11-23 13:43:10,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940913651] [2021-11-23 13:43:10,059 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:43:10,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-23 13:43:10,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:43:10,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-23 13:43:10,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=6821, Unknown=5, NotChecked=0, Total=7140 [2021-11-23 13:43:10,061 INFO L87 Difference]: Start difference. First operand 76 states and 96 transitions. Second operand has 56 states, 53 states have (on average 1.1886792452830188) internal successors, (63), 33 states have internal predecessors, (63), 5 states have call successors, (5), 1 states have call predecessors, (5), 22 states have return successors, (23), 23 states have call predecessors, (23), 5 states have call successors, (23) [2021-11-23 13:43:11,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:43:11,725 INFO L93 Difference]: Finished difference Result 92 states and 118 transitions. [2021-11-23 13:43:11,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-23 13:43:11,725 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 53 states have (on average 1.1886792452830188) internal successors, (63), 33 states have internal predecessors, (63), 5 states have call successors, (5), 1 states have call predecessors, (5), 22 states have return successors, (23), 23 states have call predecessors, (23), 5 states have call successors, (23) Word has length 97 [2021-11-23 13:43:11,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:43:11,727 INFO L225 Difference]: With dead ends: 92 [2021-11-23 13:43:11,727 INFO L226 Difference]: Without dead ends: 88 [2021-11-23 13:43:11,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 148 SyntacticMatches, 4 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2263 ImplicationChecksByTransitivity, 19.5s TimeCoverageRelationStatistics Valid=737, Invalid=9970, Unknown=5, NotChecked=0, Total=10712 [2021-11-23 13:43:11,729 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 26 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 1357 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 1383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 13:43:11,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 629 Invalid, 1383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1357 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-23 13:43:11,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-23 13:43:11,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 81. [2021-11-23 13:43:11,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 55 states have internal predecessors, (57), 9 states have call successors, (9), 3 states have call predecessors, (9), 17 states have return successors, (41), 22 states have call predecessors, (41), 9 states have call successors, (41) [2021-11-23 13:43:11,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 107 transitions. [2021-11-23 13:43:11,740 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 107 transitions. Word has length 97 [2021-11-23 13:43:11,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:43:11,740 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 107 transitions. [2021-11-23 13:43:11,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 53 states have (on average 1.1886792452830188) internal successors, (63), 33 states have internal predecessors, (63), 5 states have call successors, (5), 1 states have call predecessors, (5), 22 states have return successors, (23), 23 states have call predecessors, (23), 5 states have call successors, (23) [2021-11-23 13:43:11,741 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 107 transitions. [2021-11-23 13:43:11,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-23 13:43:11,743 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:43:11,743 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 12, 12, 12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:43:11,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-23 13:43:11,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-23 13:43:11,975 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:43:11,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:43:11,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1916071604, now seen corresponding path program 15 times [2021-11-23 13:43:11,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:43:11,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886424130] [2021-11-23 13:43:11,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:43:11,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:43:11,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:43:12,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-23 13:43:12,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:43:12,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:43:12,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:43:12,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:43:12,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:43:12,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:43:12,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:43:12,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:43:12,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:43:12,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-23 13:43:12,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:43:12,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:43:12,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:43:12,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:43:12,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:43:12,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:43:12,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:43:12,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:43:12,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:43:12,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:43:12,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:43:12,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:43:12,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:43:13,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:43:13,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:43:13,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:43:13,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:43:13,271 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 44 proven. 292 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2021-11-23 13:43:13,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:43:13,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886424130] [2021-11-23 13:43:13,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886424130] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:43:13,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934534403] [2021-11-23 13:43:13,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 13:43:13,272 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:43:13,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:43:13,273 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:43:13,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-23 13:43:13,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-11-23 13:43:13,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:43:13,442 WARN L261 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 169 conjunts are in the unsatisfiable core [2021-11-23 13:43:13,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:43:15,186 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 8 proven. 274 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2021-11-23 13:43:15,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:43:47,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934534403] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:43:47,943 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:43:47,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 26] total 58 [2021-11-23 13:43:47,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860468787] [2021-11-23 13:43:47,943 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:43:47,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-11-23 13:43:47,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:43:47,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-11-23 13:43:47,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=7319, Unknown=11, NotChecked=0, Total=7656 [2021-11-23 13:43:47,945 INFO L87 Difference]: Start difference. First operand 81 states and 107 transitions. Second operand has 58 states, 55 states have (on average 1.1818181818181819) internal successors, (65), 34 states have internal predecessors, (65), 5 states have call successors, (5), 1 states have call predecessors, (5), 23 states have return successors, (24), 24 states have call predecessors, (24), 5 states have call successors, (24) [2021-11-23 13:43:49,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:43:49,620 INFO L93 Difference]: Finished difference Result 94 states and 121 transitions. [2021-11-23 13:43:49,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-23 13:43:49,621 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 55 states have (on average 1.1818181818181819) internal successors, (65), 34 states have internal predecessors, (65), 5 states have call successors, (5), 1 states have call predecessors, (5), 23 states have return successors, (24), 24 states have call predecessors, (24), 5 states have call successors, (24) Word has length 104 [2021-11-23 13:43:49,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:43:49,622 INFO L225 Difference]: With dead ends: 94 [2021-11-23 13:43:49,622 INFO L226 Difference]: Without dead ends: 90 [2021-11-23 13:43:49,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 157 SyntacticMatches, 3 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2285 ImplicationChecksByTransitivity, 30.8s TimeCoverageRelationStatistics Valid=752, Invalid=10579, Unknown=11, NotChecked=0, Total=11342 [2021-11-23 13:43:49,624 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 16 mSDsluCounter, 690 mSDsCounter, 0 mSdLazyCounter, 1540 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 714 SdHoareTripleChecker+Invalid, 1548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 13:43:49,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 714 Invalid, 1548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1540 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-23 13:43:49,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-23 13:43:49,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 81. [2021-11-23 13:43:49,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 55 states have internal predecessors, (57), 9 states have call successors, (9), 3 states have call predecessors, (9), 17 states have return successors, (41), 22 states have call predecessors, (41), 9 states have call successors, (41) [2021-11-23 13:43:49,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 107 transitions. [2021-11-23 13:43:49,643 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 107 transitions. Word has length 104 [2021-11-23 13:43:49,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:43:49,644 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 107 transitions. [2021-11-23 13:43:49,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 55 states have (on average 1.1818181818181819) internal successors, (65), 34 states have internal predecessors, (65), 5 states have call successors, (5), 1 states have call predecessors, (5), 23 states have return successors, (24), 24 states have call predecessors, (24), 5 states have call successors, (24) [2021-11-23 13:43:49,644 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 107 transitions. [2021-11-23 13:43:49,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-23 13:43:49,646 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:43:49,646 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 13, 13, 13, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:43:49,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-23 13:43:49,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-23 13:43:49,862 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:43:49,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:43:49,862 INFO L85 PathProgramCache]: Analyzing trace with hash -43543002, now seen corresponding path program 16 times [2021-11-23 13:43:49,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:43:49,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821459588] [2021-11-23 13:43:49,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:43:49,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:43:49,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:43:49,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-23 13:43:49,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:43:49,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:43:49,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:43:50,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:43:50,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:43:50,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:43:50,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:43:50,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:43:50,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:43:50,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:43:50,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:43:50,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-23 13:43:50,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:43:50,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:43:50,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:43:50,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:43:50,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:43:50,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:43:50,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:43:50,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:43:50,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:43:50,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:43:50,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:43:50,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:43:50,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:43:51,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:43:51,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:43:51,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:43:51,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:43:51,257 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 48 proven. 336 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-11-23 13:43:51,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:43:51,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821459588] [2021-11-23 13:43:51,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821459588] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:43:51,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528929010] [2021-11-23 13:43:51,258 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 13:43:51,258 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:43:51,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:43:51,262 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:43:51,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-23 13:43:51,420 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 13:43:51,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:43:51,425 WARN L261 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 181 conjunts are in the unsatisfiable core [2021-11-23 13:43:51,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:43:53,115 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 8 proven. 315 refuted. 0 times theorem prover too weak. 358 trivial. 0 not checked. [2021-11-23 13:43:53,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:44:29,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528929010] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:44:29,432 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:44:29,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 26] total 60 [2021-11-23 13:44:29,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404717808] [2021-11-23 13:44:29,432 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:44:29,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-11-23 13:44:29,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:44:29,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-11-23 13:44:29,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=7663, Unknown=13, NotChecked=0, Total=8010 [2021-11-23 13:44:29,435 INFO L87 Difference]: Start difference. First operand 81 states and 107 transitions. Second operand has 60 states, 57 states have (on average 1.1754385964912282) internal successors, (67), 35 states have internal predecessors, (67), 5 states have call successors, (5), 1 states have call predecessors, (5), 24 states have return successors, (25), 25 states have call predecessors, (25), 5 states have call successors, (25) [2021-11-23 13:44:31,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:44:31,547 INFO L93 Difference]: Finished difference Result 92 states and 117 transitions. [2021-11-23 13:44:31,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-23 13:44:31,553 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 57 states have (on average 1.1754385964912282) internal successors, (67), 35 states have internal predecessors, (67), 5 states have call successors, (5), 1 states have call predecessors, (5), 24 states have return successors, (25), 25 states have call predecessors, (25), 5 states have call successors, (25) Word has length 111 [2021-11-23 13:44:31,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:44:31,554 INFO L225 Difference]: With dead ends: 92 [2021-11-23 13:44:31,554 INFO L226 Difference]: Without dead ends: 88 [2021-11-23 13:44:31,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 166 SyntacticMatches, 3 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2286 ImplicationChecksByTransitivity, 33.9s TimeCoverageRelationStatistics Valid=762, Invalid=10997, Unknown=13, NotChecked=0, Total=11772 [2021-11-23 13:44:31,556 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 19 mSDsluCounter, 760 mSDsCounter, 0 mSdLazyCounter, 1736 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 783 SdHoareTripleChecker+Invalid, 1748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:44:31,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 783 Invalid, 1748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1736 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-23 13:44:31,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-23 13:44:31,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 79. [2021-11-23 13:44:31,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 54 states have internal predecessors, (56), 8 states have call successors, (8), 3 states have call predecessors, (8), 17 states have return successors, (39), 21 states have call predecessors, (39), 8 states have call successors, (39) [2021-11-23 13:44:31,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 103 transitions. [2021-11-23 13:44:31,568 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 103 transitions. Word has length 111 [2021-11-23 13:44:31,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:44:31,568 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 103 transitions. [2021-11-23 13:44:31,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 57 states have (on average 1.1754385964912282) internal successors, (67), 35 states have internal predecessors, (67), 5 states have call successors, (5), 1 states have call predecessors, (5), 24 states have return successors, (25), 25 states have call predecessors, (25), 5 states have call successors, (25) [2021-11-23 13:44:31,569 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 103 transitions. [2021-11-23 13:44:31,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-23 13:44:31,571 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:44:31,571 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:44:31,599 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-11-23 13:44:31,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:44:31,772 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:44:31,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:44:31,772 INFO L85 PathProgramCache]: Analyzing trace with hash -287264164, now seen corresponding path program 17 times [2021-11-23 13:44:31,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:44:31,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929664851] [2021-11-23 13:44:31,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:44:31,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:44:31,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:44:31,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-23 13:44:31,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:44:31,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:44:31,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:44:32,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:44:32,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:44:32,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-23 13:44:32,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:44:32,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:44:32,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:44:32,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:44:32,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:44:32,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:44:32,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:44:32,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:44:32,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:44:32,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:44:32,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:44:32,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:44:32,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:44:32,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:44:32,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:44:32,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:44:32,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:44:32,998 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 36 proven. 213 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2021-11-23 13:44:32,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:44:32,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929664851] [2021-11-23 13:44:32,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929664851] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:44:32,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712223997] [2021-11-23 13:44:32,999 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 13:44:32,999 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:44:32,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:44:33,000 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:44:33,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-23 13:44:33,196 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-11-23 13:44:33,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:44:33,200 WARN L261 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 145 conjunts are in the unsatisfiable core [2021-11-23 13:44:33,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:44:34,657 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 17 proven. 193 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-11-23 13:44:34,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:44:40,341 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 36 proven. 315 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-23 13:44:40,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712223997] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:44:40,341 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:44:40,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 26, 39] total 80 [2021-11-23 13:44:40,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097916584] [2021-11-23 13:44:40,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:44:40,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-11-23 13:44:40,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:44:40,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-11-23 13:44:40,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=6028, Unknown=0, NotChecked=0, Total=6320 [2021-11-23 13:44:40,344 INFO L87 Difference]: Start difference. First operand 79 states and 103 transitions. Second operand has 80 states, 76 states have (on average 1.4473684210526316) internal successors, (110), 47 states have internal predecessors, (110), 16 states have call successors, (16), 1 states have call predecessors, (16), 23 states have return successors, (34), 33 states have call predecessors, (34), 16 states have call successors, (34) [2021-11-23 13:44:43,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:44:43,040 INFO L93 Difference]: Finished difference Result 98 states and 120 transitions. [2021-11-23 13:44:43,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-23 13:44:43,041 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 76 states have (on average 1.4473684210526316) internal successors, (110), 47 states have internal predecessors, (110), 16 states have call successors, (16), 1 states have call predecessors, (16), 23 states have return successors, (34), 33 states have call predecessors, (34), 16 states have call successors, (34) Word has length 90 [2021-11-23 13:44:43,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:44:43,042 INFO L225 Difference]: With dead ends: 98 [2021-11-23 13:44:43,042 INFO L226 Difference]: Without dead ends: 91 [2021-11-23 13:44:43,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 142 SyntacticMatches, 14 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2840 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=884, Invalid=10888, Unknown=0, NotChecked=0, Total=11772 [2021-11-23 13:44:43,044 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 55 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 2057 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 2134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 2057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-23 13:44:43,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 630 Invalid, 2134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 2057 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-23 13:44:43,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-23 13:44:43,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 82. [2021-11-23 13:44:43,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 56 states have internal predecessors, (58), 8 states have call successors, (8), 3 states have call predecessors, (8), 18 states have return successors, (37), 22 states have call predecessors, (37), 8 states have call successors, (37) [2021-11-23 13:44:43,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 103 transitions. [2021-11-23 13:44:43,055 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 103 transitions. Word has length 90 [2021-11-23 13:44:43,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:44:43,056 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 103 transitions. [2021-11-23 13:44:43,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 76 states have (on average 1.4473684210526316) internal successors, (110), 47 states have internal predecessors, (110), 16 states have call successors, (16), 1 states have call predecessors, (16), 23 states have return successors, (34), 33 states have call predecessors, (34), 16 states have call successors, (34) [2021-11-23 13:44:43,056 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 103 transitions. [2021-11-23 13:44:43,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-23 13:44:43,058 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:44:43,058 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:44:43,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-23 13:44:43,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:44:43,266 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:44:43,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:44:43,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1870853176, now seen corresponding path program 18 times [2021-11-23 13:44:43,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:44:43,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634352487] [2021-11-23 13:44:43,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:44:43,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:44:43,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:44:43,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-23 13:44:43,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:44:43,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:44:43,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:44:43,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:44:43,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:44:43,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:44:43,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:44:43,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:44:43,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:44:43,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:44:43,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:44:43,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:44:43,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:44:43,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-23 13:44:43,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:44:44,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:44:44,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:44:44,128 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 12 proven. 121 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2021-11-23 13:44:44,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:44:44,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634352487] [2021-11-23 13:44:44,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634352487] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:44:44,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834160464] [2021-11-23 13:44:44,129 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 13:44:44,129 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:44:44,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:44:44,134 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:44:44,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-23 13:44:44,333 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-11-23 13:44:44,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:44:44,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 105 conjunts are in the unsatisfiable core [2021-11-23 13:44:44,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:44:45,592 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-23 13:44:45,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:44:48,720 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 186 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-23 13:44:48,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834160464] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:44:48,720 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:44:48,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 31] total 70 [2021-11-23 13:44:48,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429850925] [2021-11-23 13:44:48,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:44:48,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-11-23 13:44:48,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:44:48,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-11-23 13:44:48,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=4543, Unknown=0, NotChecked=0, Total=4830 [2021-11-23 13:44:48,724 INFO L87 Difference]: Start difference. First operand 82 states and 103 transitions. Second operand has 70 states, 66 states have (on average 1.4848484848484849) internal successors, (98), 43 states have internal predecessors, (98), 14 states have call successors, (14), 1 states have call predecessors, (14), 20 states have return successors, (27), 27 states have call predecessors, (27), 14 states have call successors, (27) [2021-11-23 13:44:51,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:44:51,210 INFO L93 Difference]: Finished difference Result 113 states and 145 transitions. [2021-11-23 13:44:51,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-23 13:44:51,211 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 66 states have (on average 1.4848484848484849) internal successors, (98), 43 states have internal predecessors, (98), 14 states have call successors, (14), 1 states have call predecessors, (14), 20 states have return successors, (27), 27 states have call predecessors, (27), 14 states have call successors, (27) Word has length 69 [2021-11-23 13:44:51,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:44:51,212 INFO L225 Difference]: With dead ends: 113 [2021-11-23 13:44:51,212 INFO L226 Difference]: Without dead ends: 97 [2021-11-23 13:44:51,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2436 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=914, Invalid=9388, Unknown=0, NotChecked=0, Total=10302 [2021-11-23 13:44:51,214 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 37 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 1906 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 1976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:44:51,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 546 Invalid, 1976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1906 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-23 13:44:51,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-11-23 13:44:51,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 82. [2021-11-23 13:44:51,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 56 states have internal predecessors, (58), 8 states have call successors, (8), 3 states have call predecessors, (8), 18 states have return successors, (36), 22 states have call predecessors, (36), 8 states have call successors, (36) [2021-11-23 13:44:51,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 102 transitions. [2021-11-23 13:44:51,227 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 102 transitions. Word has length 69 [2021-11-23 13:44:51,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:44:51,228 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 102 transitions. [2021-11-23 13:44:51,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 66 states have (on average 1.4848484848484849) internal successors, (98), 43 states have internal predecessors, (98), 14 states have call successors, (14), 1 states have call predecessors, (14), 20 states have return successors, (27), 27 states have call predecessors, (27), 14 states have call successors, (27) [2021-11-23 13:44:51,228 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 102 transitions. [2021-11-23 13:44:51,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-23 13:44:51,230 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:44:51,230 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:44:51,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-23 13:44:51,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:44:51,452 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:44:51,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:44:51,452 INFO L85 PathProgramCache]: Analyzing trace with hash -401646488, now seen corresponding path program 19 times [2021-11-23 13:44:51,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:44:51,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328369832] [2021-11-23 13:44:51,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:44:51,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:44:51,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:44:51,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-23 13:44:51,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:44:51,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:44:51,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:44:51,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:44:51,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:44:51,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-23 13:44:51,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:44:51,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:44:51,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:44:51,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:44:51,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:44:52,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:44:52,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:44:52,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:44:52,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:44:52,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:44:52,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:44:52,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:44:52,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:44:52,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:44:52,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:44:52,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:44:52,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:44:52,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:44:52,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:44:52,717 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 40 proven. 251 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2021-11-23 13:44:52,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:44:52,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328369832] [2021-11-23 13:44:52,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328369832] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:44:52,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090621130] [2021-11-23 13:44:52,717 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 13:44:52,718 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:44:52,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:44:52,718 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:44:52,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-23 13:44:52,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:44:52,897 WARN L261 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 157 conjunts are in the unsatisfiable core [2021-11-23 13:44:52,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:44:54,857 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 9 proven. 238 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-11-23 13:44:54,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:45:01,752 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 38 proven. 380 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-23 13:45:01,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090621130] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:45:01,752 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:45:01,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 28, 42] total 86 [2021-11-23 13:45:01,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801893059] [2021-11-23 13:45:01,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:45:01,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2021-11-23 13:45:01,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:45:01,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-11-23 13:45:01,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=6996, Unknown=0, NotChecked=0, Total=7310 [2021-11-23 13:45:01,754 INFO L87 Difference]: Start difference. First operand 82 states and 102 transitions. Second operand has 86 states, 82 states have (on average 1.4024390243902438) internal successors, (115), 50 states have internal predecessors, (115), 17 states have call successors, (17), 1 states have call predecessors, (17), 25 states have return successors, (37), 36 states have call predecessors, (37), 17 states have call successors, (37) [2021-11-23 13:45:04,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:45:04,933 INFO L93 Difference]: Finished difference Result 110 states and 139 transitions. [2021-11-23 13:45:04,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-23 13:45:04,933 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 82 states have (on average 1.4024390243902438) internal successors, (115), 50 states have internal predecessors, (115), 17 states have call successors, (17), 1 states have call predecessors, (17), 25 states have return successors, (37), 36 states have call predecessors, (37), 17 states have call successors, (37) Word has length 97 [2021-11-23 13:45:04,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:45:04,935 INFO L225 Difference]: With dead ends: 110 [2021-11-23 13:45:04,935 INFO L226 Difference]: Without dead ends: 103 [2021-11-23 13:45:04,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 164 SyntacticMatches, 4 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2921 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=980, Invalid=12592, Unknown=0, NotChecked=0, Total=13572 [2021-11-23 13:45:04,938 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 149 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 2657 mSolverCounterSat, 278 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 875 SdHoareTripleChecker+Invalid, 2935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 278 IncrementalHoareTripleChecker+Valid, 2657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-23 13:45:04,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 875 Invalid, 2935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [278 Valid, 2657 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-23 13:45:04,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-23 13:45:04,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 88. [2021-11-23 13:45:04,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 60 states have internal predecessors, (62), 8 states have call successors, (8), 3 states have call predecessors, (8), 20 states have return successors, (39), 24 states have call predecessors, (39), 8 states have call successors, (39) [2021-11-23 13:45:04,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 109 transitions. [2021-11-23 13:45:04,949 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 109 transitions. Word has length 97 [2021-11-23 13:45:04,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:45:04,950 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 109 transitions. [2021-11-23 13:45:04,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 82 states have (on average 1.4024390243902438) internal successors, (115), 50 states have internal predecessors, (115), 17 states have call successors, (17), 1 states have call predecessors, (17), 25 states have return successors, (37), 36 states have call predecessors, (37), 17 states have call successors, (37) [2021-11-23 13:45:04,950 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 109 transitions. [2021-11-23 13:45:04,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-23 13:45:04,952 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:45:04,952 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:45:04,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-23 13:45:05,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-23 13:45:05,174 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:45:05,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:45:05,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1659753786, now seen corresponding path program 20 times [2021-11-23 13:45:05,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:45:05,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394682735] [2021-11-23 13:45:05,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:45:05,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:45:05,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:45:05,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-23 13:45:05,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:45:05,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:45:05,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:45:05,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:45:05,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:45:05,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:45:05,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:45:05,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:45:05,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:45:05,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:45:05,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:45:05,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:45:05,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:45:05,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:45:05,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:45:06,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-23 13:45:06,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:45:06,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:45:06,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:45:06,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:45:06,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:45:06,335 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 30 proven. 180 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-11-23 13:45:06,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:45:06,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394682735] [2021-11-23 13:45:06,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394682735] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:45:06,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162612450] [2021-11-23 13:45:06,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 13:45:06,336 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:45:06,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:45:06,337 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:45:06,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-23 13:45:06,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 13:45:06,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:45:06,545 WARN L261 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 133 conjunts are in the unsatisfiable core [2021-11-23 13:45:06,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:45:07,928 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 2 proven. 172 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2021-11-23 13:45:07,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:45:30,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162612450] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:45:30,398 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:45:30,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 24] total 50 [2021-11-23 13:45:30,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523337849] [2021-11-23 13:45:30,399 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:45:30,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-23 13:45:30,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:45:30,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-23 13:45:30,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=4175, Unknown=8, NotChecked=0, Total=4422 [2021-11-23 13:45:30,401 INFO L87 Difference]: Start difference. First operand 88 states and 109 transitions. Second operand has 50 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 30 states have internal predecessors, (57), 5 states have call successors, (5), 1 states have call predecessors, (5), 19 states have return successors, (20), 20 states have call predecessors, (20), 5 states have call successors, (20) [2021-11-23 13:45:31,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:45:31,824 INFO L93 Difference]: Finished difference Result 98 states and 119 transitions. [2021-11-23 13:45:31,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-23 13:45:31,825 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 30 states have internal predecessors, (57), 5 states have call successors, (5), 1 states have call predecessors, (5), 19 states have return successors, (20), 20 states have call predecessors, (20), 5 states have call successors, (20) Word has length 83 [2021-11-23 13:45:31,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:45:31,826 INFO L225 Difference]: With dead ends: 98 [2021-11-23 13:45:31,826 INFO L226 Difference]: Without dead ends: 94 [2021-11-23 13:45:31,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 103 SyntacticMatches, 3 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1390 ImplicationChecksByTransitivity, 21.3s TimeCoverageRelationStatistics Valid=518, Invalid=6446, Unknown=8, NotChecked=0, Total=6972 [2021-11-23 13:45:31,827 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 47 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 1172 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 1228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 13:45:31,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 574 Invalid, 1228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1172 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 13:45:31,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-23 13:45:31,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 88. [2021-11-23 13:45:31,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 60 states have internal predecessors, (62), 8 states have call successors, (8), 3 states have call predecessors, (8), 20 states have return successors, (39), 24 states have call predecessors, (39), 8 states have call successors, (39) [2021-11-23 13:45:31,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 109 transitions. [2021-11-23 13:45:31,838 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 109 transitions. Word has length 83 [2021-11-23 13:45:31,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:45:31,838 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 109 transitions. [2021-11-23 13:45:31,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 30 states have internal predecessors, (57), 5 states have call successors, (5), 1 states have call predecessors, (5), 19 states have return successors, (20), 20 states have call predecessors, (20), 5 states have call successors, (20) [2021-11-23 13:45:31,839 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 109 transitions. [2021-11-23 13:45:31,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-23 13:45:31,840 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:45:31,840 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 12, 12, 12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:45:31,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-23 13:45:32,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-23 13:45:32,054 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:45:32,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:45:32,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1817590444, now seen corresponding path program 21 times [2021-11-23 13:45:32,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:45:32,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231392910] [2021-11-23 13:45:32,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:45:32,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:45:32,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:45:32,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-23 13:45:32,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:45:32,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:45:32,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:45:32,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:45:32,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:45:32,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-23 13:45:32,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:45:32,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:45:32,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:45:32,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:45:32,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:45:32,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:45:32,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:45:32,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:45:32,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:45:32,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:45:32,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:45:33,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:45:33,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:45:33,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:45:33,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:45:33,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:45:33,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:45:33,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:45:33,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:45:33,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:45:33,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:45:33,796 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 44 proven. 292 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2021-11-23 13:45:33,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:45:33,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231392910] [2021-11-23 13:45:33,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231392910] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:45:33,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805457956] [2021-11-23 13:45:33,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 13:45:33,798 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:45:33,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:45:33,798 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:45:33,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-23 13:45:34,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-11-23 13:45:34,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:45:34,025 WARN L261 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 169 conjunts are in the unsatisfiable core [2021-11-23 13:45:34,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:45:36,324 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 10 proven. 278 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2021-11-23 13:45:36,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:45:44,824 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 41 proven. 451 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-11-23 13:45:44,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805457956] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:45:44,824 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:45:44,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 30, 45] total 92 [2021-11-23 13:45:44,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889582417] [2021-11-23 13:45:44,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:45:44,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2021-11-23 13:45:44,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:45:44,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-11-23 13:45:44,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=336, Invalid=8036, Unknown=0, NotChecked=0, Total=8372 [2021-11-23 13:45:44,827 INFO L87 Difference]: Start difference. First operand 88 states and 109 transitions. Second operand has 92 states, 88 states have (on average 1.3977272727272727) internal successors, (123), 53 states have internal predecessors, (123), 18 states have call successors, (18), 1 states have call predecessors, (18), 27 states have return successors, (40), 39 states have call predecessors, (40), 18 states have call successors, (40) [2021-11-23 13:45:48,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:45:48,871 INFO L93 Difference]: Finished difference Result 116 states and 146 transitions. [2021-11-23 13:45:48,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-23 13:45:48,872 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 88 states have (on average 1.3977272727272727) internal successors, (123), 53 states have internal predecessors, (123), 18 states have call successors, (18), 1 states have call predecessors, (18), 27 states have return successors, (40), 39 states have call predecessors, (40), 18 states have call successors, (40) Word has length 104 [2021-11-23 13:45:48,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:45:48,873 INFO L225 Difference]: With dead ends: 116 [2021-11-23 13:45:48,873 INFO L226 Difference]: Without dead ends: 109 [2021-11-23 13:45:48,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 176 SyntacticMatches, 4 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3339 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=1080, Invalid=14420, Unknown=0, NotChecked=0, Total=15500 [2021-11-23 13:45:48,876 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 114 mSDsluCounter, 955 mSDsCounter, 0 mSdLazyCounter, 2963 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 979 SdHoareTripleChecker+Invalid, 3160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 2963 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:45:48,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 979 Invalid, 3160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 2963 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-23 13:45:48,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-23 13:45:48,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 94. [2021-11-23 13:45:48,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 64 states have internal predecessors, (66), 8 states have call successors, (8), 3 states have call predecessors, (8), 22 states have return successors, (42), 26 states have call predecessors, (42), 8 states have call successors, (42) [2021-11-23 13:45:48,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 116 transitions. [2021-11-23 13:45:48,885 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 116 transitions. Word has length 104 [2021-11-23 13:45:48,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:45:48,885 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 116 transitions. [2021-11-23 13:45:48,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 88 states have (on average 1.3977272727272727) internal successors, (123), 53 states have internal predecessors, (123), 18 states have call successors, (18), 1 states have call predecessors, (18), 27 states have return successors, (40), 39 states have call predecessors, (40), 18 states have call successors, (40) [2021-11-23 13:45:48,886 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 116 transitions. [2021-11-23 13:45:48,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-23 13:45:48,887 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:45:48,887 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:45:48,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-23 13:45:49,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-23 13:45:49,102 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:45:49,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:45:49,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1444557372, now seen corresponding path program 22 times [2021-11-23 13:45:49,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:45:49,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425034050] [2021-11-23 13:45:49,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:45:49,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:45:49,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:45:49,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-23 13:45:49,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:45:49,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:45:49,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:45:49,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:45:49,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:45:49,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:45:49,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:45:49,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:45:49,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:45:49,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:45:49,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:45:49,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:45:49,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:45:49,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:45:49,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:45:49,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:45:49,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:45:50,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-23 13:45:50,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:45:50,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:45:50,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:45:50,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:45:50,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:45:50,355 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 34 proven. 215 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2021-11-23 13:45:50,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:45:50,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425034050] [2021-11-23 13:45:50,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425034050] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:45:50,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385248606] [2021-11-23 13:45:50,355 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 13:45:50,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:45:50,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:45:50,356 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:45:50,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-23 13:45:50,575 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 13:45:50,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:45:50,579 WARN L261 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 144 conjunts are in the unsatisfiable core [2021-11-23 13:45:50,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:45:52,538 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 21 proven. 210 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2021-11-23 13:45:52,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:45:58,527 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 8 proven. 336 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-23 13:45:58,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385248606] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:45:58,527 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:45:58,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 30, 37] total 80 [2021-11-23 13:45:58,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620442336] [2021-11-23 13:45:58,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:45:58,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-11-23 13:45:58,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:45:58,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-11-23 13:45:58,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=6006, Unknown=0, NotChecked=0, Total=6320 [2021-11-23 13:45:58,530 INFO L87 Difference]: Start difference. First operand 94 states and 116 transitions. Second operand has 80 states, 75 states have (on average 1.4266666666666667) internal successors, (107), 49 states have internal predecessors, (107), 15 states have call successors, (15), 1 states have call predecessors, (15), 23 states have return successors, (34), 31 states have call predecessors, (34), 15 states have call successors, (34) [2021-11-23 13:46:01,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:46:01,655 INFO L93 Difference]: Finished difference Result 121 states and 156 transitions. [2021-11-23 13:46:01,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-23 13:46:01,656 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 75 states have (on average 1.4266666666666667) internal successors, (107), 49 states have internal predecessors, (107), 15 states have call successors, (15), 1 states have call predecessors, (15), 23 states have return successors, (34), 31 states have call predecessors, (34), 15 states have call successors, (34) Word has length 90 [2021-11-23 13:46:01,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:46:01,657 INFO L225 Difference]: With dead ends: 121 [2021-11-23 13:46:01,657 INFO L226 Difference]: Without dead ends: 105 [2021-11-23 13:46:01,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 144 SyntacticMatches, 12 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3212 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=1174, Invalid=11936, Unknown=0, NotChecked=0, Total=13110 [2021-11-23 13:46:01,660 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 111 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 2299 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 2519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 2299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-23 13:46:01,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 596 Invalid, 2519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 2299 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-23 13:46:01,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-23 13:46:01,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 92. [2021-11-23 13:46:01,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 63 states have internal predecessors, (65), 7 states have call successors, (7), 3 states have call predecessors, (7), 22 states have return successors, (40), 25 states have call predecessors, (40), 7 states have call successors, (40) [2021-11-23 13:46:01,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 112 transitions. [2021-11-23 13:46:01,670 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 112 transitions. Word has length 90 [2021-11-23 13:46:01,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:46:01,670 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 112 transitions. [2021-11-23 13:46:01,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 75 states have (on average 1.4266666666666667) internal successors, (107), 49 states have internal predecessors, (107), 15 states have call successors, (15), 1 states have call predecessors, (15), 23 states have return successors, (34), 31 states have call predecessors, (34), 15 states have call successors, (34) [2021-11-23 13:46:01,671 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 112 transitions. [2021-11-23 13:46:01,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-23 13:46:01,672 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:46:01,672 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 14, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:46:01,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-23 13:46:01,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-23 13:46:01,886 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:46:01,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:46:01,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1958411874, now seen corresponding path program 23 times [2021-11-23 13:46:01,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:46:01,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198178667] [2021-11-23 13:46:01,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:46:01,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:46:01,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:46:02,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-23 13:46:02,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:46:02,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:46:02,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:46:02,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:46:02,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:46:02,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:46:02,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:46:02,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-23 13:46:02,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:46:02,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:46:02,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:46:02,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:46:02,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:46:02,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:46:02,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:46:02,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:46:02,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:46:02,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:46:02,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:46:02,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:46:02,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:46:03,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:46:03,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:46:03,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:46:03,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:46:03,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:46:03,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:46:03,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:46:03,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:46:03,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:46:03,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:46:03,652 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 52 proven. 383 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2021-11-23 13:46:03,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:46:03,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198178667] [2021-11-23 13:46:03,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198178667] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:46:03,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618577618] [2021-11-23 13:46:03,652 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 13:46:03,652 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:46:03,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:46:03,653 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:46:03,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-23 13:46:03,851 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2021-11-23 13:46:03,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:46:03,855 WARN L261 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 193 conjunts are in the unsatisfiable core [2021-11-23 13:46:03,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:46:05,972 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 23 proven. 354 refuted. 0 times theorem prover too weak. 405 trivial. 0 not checked. [2021-11-23 13:46:05,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:46:35,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618577618] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:46:35,388 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:46:35,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 32] total 68 [2021-11-23 13:46:35,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789771797] [2021-11-23 13:46:35,388 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:46:35,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-11-23 13:46:35,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:46:35,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-11-23 13:46:35,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=10119, Unknown=7, NotChecked=0, Total=10506 [2021-11-23 13:46:35,391 INFO L87 Difference]: Start difference. First operand 92 states and 112 transitions. Second operand has 68 states, 65 states have (on average 1.1692307692307693) internal successors, (76), 39 states have internal predecessors, (76), 5 states have call successors, (5), 1 states have call predecessors, (5), 28 states have return successors, (29), 29 states have call predecessors, (29), 5 states have call successors, (29) [2021-11-23 13:46:38,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:46:38,185 INFO L93 Difference]: Finished difference Result 108 states and 133 transitions. [2021-11-23 13:46:38,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-23 13:46:38,185 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 65 states have (on average 1.1692307692307693) internal successors, (76), 39 states have internal predecessors, (76), 5 states have call successors, (5), 1 states have call predecessors, (5), 28 states have return successors, (29), 29 states have call predecessors, (29), 5 states have call successors, (29) Word has length 118 [2021-11-23 13:46:38,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:46:38,187 INFO L225 Difference]: With dead ends: 108 [2021-11-23 13:46:38,187 INFO L226 Difference]: Without dead ends: 104 [2021-11-23 13:46:38,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 173 SyntacticMatches, 15 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3807 ImplicationChecksByTransitivity, 26.1s TimeCoverageRelationStatistics Valid=1013, Invalid=15236, Unknown=7, NotChecked=0, Total=16256 [2021-11-23 13:46:38,189 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 43 mSDsluCounter, 930 mSDsCounter, 0 mSdLazyCounter, 2090 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 957 SdHoareTripleChecker+Invalid, 2126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 2090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-23 13:46:38,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 957 Invalid, 2126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 2090 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-23 13:46:38,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-23 13:46:38,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 97. [2021-11-23 13:46:38,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 65 states have (on average 1.0461538461538462) internal successors, (68), 66 states have internal predecessors, (68), 8 states have call successors, (8), 3 states have call predecessors, (8), 23 states have return successors, (46), 27 states have call predecessors, (46), 8 states have call successors, (46) [2021-11-23 13:46:38,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 122 transitions. [2021-11-23 13:46:38,201 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 122 transitions. Word has length 118 [2021-11-23 13:46:38,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:46:38,201 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 122 transitions. [2021-11-23 13:46:38,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 65 states have (on average 1.1692307692307693) internal successors, (76), 39 states have internal predecessors, (76), 5 states have call successors, (5), 1 states have call predecessors, (5), 28 states have return successors, (29), 29 states have call predecessors, (29), 5 states have call successors, (29) [2021-11-23 13:46:38,202 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 122 transitions. [2021-11-23 13:46:38,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-23 13:46:38,203 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:46:38,203 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 15, 15, 15, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:46:38,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-23 13:46:38,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:46:38,430 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:46:38,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:46:38,430 INFO L85 PathProgramCache]: Analyzing trace with hash -80896216, now seen corresponding path program 24 times [2021-11-23 13:46:38,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:46:38,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936826856] [2021-11-23 13:46:38,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:46:38,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:46:38,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:46:38,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-23 13:46:38,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:46:38,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:46:38,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:46:38,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:46:38,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:46:38,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:46:38,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:46:38,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:46:38,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:46:38,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-23 13:46:38,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:46:39,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:46:39,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:46:39,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:46:39,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:46:39,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:46:39,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:46:39,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:46:39,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:46:39,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:46:39,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:46:39,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:46:39,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:46:39,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:46:39,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:46:40,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:46:40,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:46:40,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:46:40,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:46:40,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:46:40,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:46:40,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:46:40,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:46:40,651 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 56 proven. 433 refuted. 0 times theorem prover too weak. 401 trivial. 0 not checked. [2021-11-23 13:46:40,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:46:40,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936826856] [2021-11-23 13:46:40,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936826856] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:46:40,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512533933] [2021-11-23 13:46:40,653 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 13:46:40,653 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:46:40,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:46:40,654 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:46:40,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-23 13:46:40,945 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2021-11-23 13:46:40,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:46:40,952 WARN L261 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 205 conjunts are in the unsatisfiable core [2021-11-23 13:46:40,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:46:43,584 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 11 proven. 412 refuted. 0 times theorem prover too weak. 467 trivial. 0 not checked. [2021-11-23 13:46:43,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:47:11,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512533933] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:47:11,491 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:47:11,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 32] total 70 [2021-11-23 13:47:11,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045531875] [2021-11-23 13:47:11,491 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:47:11,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-11-23 13:47:11,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:47:11,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-11-23 13:47:11,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=388, Invalid=10525, Unknown=7, NotChecked=0, Total=10920 [2021-11-23 13:47:11,494 INFO L87 Difference]: Start difference. First operand 97 states and 122 transitions. Second operand has 70 states, 67 states have (on average 1.1492537313432836) internal successors, (77), 40 states have internal predecessors, (77), 5 states have call successors, (5), 1 states have call predecessors, (5), 29 states have return successors, (30), 30 states have call predecessors, (30), 5 states have call successors, (30) [2021-11-23 13:47:14,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:47:14,220 INFO L93 Difference]: Finished difference Result 110 states and 136 transitions. [2021-11-23 13:47:14,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-23 13:47:14,221 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 67 states have (on average 1.1492537313432836) internal successors, (77), 40 states have internal predecessors, (77), 5 states have call successors, (5), 1 states have call predecessors, (5), 29 states have return successors, (30), 30 states have call predecessors, (30), 5 states have call successors, (30) Word has length 125 [2021-11-23 13:47:14,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:47:14,222 INFO L225 Difference]: With dead ends: 110 [2021-11-23 13:47:14,222 INFO L226 Difference]: Without dead ends: 106 [2021-11-23 13:47:14,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 194 SyntacticMatches, 3 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3377 ImplicationChecksByTransitivity, 24.7s TimeCoverageRelationStatistics Valid=1023, Invalid=15740, Unknown=7, NotChecked=0, Total=16770 [2021-11-23 13:47:14,225 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 32 mSDsluCounter, 885 mSDsCounter, 0 mSdLazyCounter, 2038 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 911 SdHoareTripleChecker+Invalid, 2074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 2038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:47:14,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 911 Invalid, 2074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 2038 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-23 13:47:14,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-11-23 13:47:14,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 97. [2021-11-23 13:47:14,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 65 states have (on average 1.0461538461538462) internal successors, (68), 66 states have internal predecessors, (68), 8 states have call successors, (8), 3 states have call predecessors, (8), 23 states have return successors, (46), 27 states have call predecessors, (46), 8 states have call successors, (46) [2021-11-23 13:47:14,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 122 transitions. [2021-11-23 13:47:14,240 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 122 transitions. Word has length 125 [2021-11-23 13:47:14,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:47:14,242 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 122 transitions. [2021-11-23 13:47:14,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 67 states have (on average 1.1492537313432836) internal successors, (77), 40 states have internal predecessors, (77), 5 states have call successors, (5), 1 states have call predecessors, (5), 29 states have return successors, (30), 30 states have call predecessors, (30), 5 states have call successors, (30) [2021-11-23 13:47:14,242 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 122 transitions. [2021-11-23 13:47:14,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-23 13:47:14,244 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:47:14,244 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 13, 13, 13, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:47:14,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-23 13:47:14,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-23 13:47:14,466 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:47:14,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:47:14,466 INFO L85 PathProgramCache]: Analyzing trace with hash 200427544, now seen corresponding path program 25 times [2021-11-23 13:47:14,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:47:14,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894867501] [2021-11-23 13:47:14,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:47:14,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:47:14,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:47:14,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-23 13:47:14,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:47:14,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:47:14,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:47:14,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:47:14,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:47:14,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-23 13:47:14,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:47:14,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:47:14,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:47:14,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:47:14,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:47:15,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:47:15,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:47:15,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:47:15,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:47:15,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:47:15,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:47:15,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:47:15,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:47:15,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:47:15,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:47:15,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:47:15,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:47:15,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:47:15,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:47:15,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:47:15,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:47:15,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:47:15,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:47:16,007 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 48 proven. 336 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-11-23 13:47:16,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:47:16,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894867501] [2021-11-23 13:47:16,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894867501] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:47:16,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041513509] [2021-11-23 13:47:16,008 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 13:47:16,008 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:47:16,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:47:16,009 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:47:16,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-23 13:47:16,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:47:16,314 WARN L261 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 181 conjunts are in the unsatisfiable core [2021-11-23 13:47:16,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:47:18,369 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 11 proven. 321 refuted. 0 times theorem prover too weak. 349 trivial. 0 not checked. [2021-11-23 13:47:18,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:47:29,465 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|aux_div_v_mult_#in~n_BEFORE_CALL_414_93| Int) (v_mult_~n_BEFORE_CALL_414 Int) (|aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_414_93_113_139| Int) (|aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_414_93_113| Int) (|aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_414_93_113_139| Int)) (let ((.cse0 (+ |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_414_93_113_139| (* 11 |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_414_93_113_139|))) (.cse1 (div (+ (- 1) (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_414_93_113_139| (- 22)) (* |c_mult_#res| 2) (* |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_414_93_113_139| (- 2)) (* v_mult_~n_BEFORE_CALL_414 2)) (- 11))) (.cse2 (div (+ (- 1) (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_414_93_113_139| 22) (* v_mult_~n_BEFORE_CALL_414 (- 2)) (* |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_414_93_113_139| 2) (* |c_mult_#res| (- 2))) 11))) (or (< |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_414_93_113_139| 0) (< (+ |c_mult_#res| (* 11 |aux_div_v_mult_#in~n_BEFORE_CALL_414_93|)) .cse0) (< (+ |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_414_93_113| 1) .cse1) (< .cse0 (+ |c_mult_#res| (* 11 |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_414_93_113|))) (<= .cse1 (+ |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_414_93_113_139| 1)) (< .cse1 (+ 2 .cse2)) (<= 11 |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_414_93_113_139|) (< (+ .cse2 1) |aux_div_v_mult_#in~n_BEFORE_CALL_414_93|)))) (<= 0 |c_mult_#in~m|) (forall ((|aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_414_93_113_167| Int) (|aux_div_v_mult_#in~n_BEFORE_CALL_414_93| Int) (v_mult_~n_BEFORE_CALL_414 Int) (|aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_414_93_113_167| Int) (|aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_414_93_113| Int)) (let ((.cse6 (div (+ (- 1) (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_414_93_113_167| 22) (* v_mult_~n_BEFORE_CALL_414 (- 2)) (* |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_414_93_113_167| (- 2)) (* |c_mult_#res| (- 2))) 11))) (let ((.cse5 (* 11 |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_414_93_113_167|)) (.cse4 (div (+ (- 1) (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_414_93_113_167| (- 22)) (* |c_mult_#res| 2) (* v_mult_~n_BEFORE_CALL_414 2) (* |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_414_93_113_167| 2)) (- 11))) (.cse3 (+ .cse6 1))) (or (<= |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_414_93_113_167| .cse3) (< (+ |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_414_93_113| 1) .cse4) (< |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_414_93_113_167| 0) (< (+ |c_mult_#res| |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_414_93_113_167| (* 11 |aux_div_v_mult_#in~n_BEFORE_CALL_414_93|)) .cse5) (< .cse5 (+ |c_mult_#res| |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_414_93_113_167| (* 11 |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_414_93_113|))) (< .cse4 (+ 2 .cse6)) (< .cse3 |aux_div_v_mult_#in~n_BEFORE_CALL_414_93|) (<= 11 |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_414_93_113_167|))))) (<= |c_mult_#in~m| 0)) is different from false [2021-11-23 13:47:29,996 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 44 proven. 502 refuted. 0 times theorem prover too weak. 107 trivial. 28 not checked. [2021-11-23 13:47:29,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041513509] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:47:29,996 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:47:29,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 32, 49] total 99 [2021-11-23 13:47:29,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30724269] [2021-11-23 13:47:29,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:47:29,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2021-11-23 13:47:29,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:47:29,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-11-23 13:47:29,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=9149, Unknown=1, NotChecked=192, Total=9702 [2021-11-23 13:47:29,998 INFO L87 Difference]: Start difference. First operand 97 states and 122 transitions. Second operand has 99 states, 95 states have (on average 1.4) internal successors, (133), 57 states have internal predecessors, (133), 19 states have call successors, (19), 1 states have call predecessors, (19), 30 states have return successors, (43), 42 states have call predecessors, (43), 19 states have call successors, (43) [2021-11-23 13:47:34,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:47:34,901 INFO L93 Difference]: Finished difference Result 118 states and 148 transitions. [2021-11-23 13:47:34,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-23 13:47:34,901 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 95 states have (on average 1.4) internal successors, (133), 57 states have internal predecessors, (133), 19 states have call successors, (19), 1 states have call predecessors, (19), 30 states have return successors, (43), 42 states have call predecessors, (43), 19 states have call successors, (43) Word has length 111 [2021-11-23 13:47:34,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:47:34,902 INFO L225 Difference]: With dead ends: 118 [2021-11-23 13:47:34,903 INFO L226 Difference]: Without dead ends: 111 [2021-11-23 13:47:34,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 188 SyntacticMatches, 3 SemanticMatches, 131 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3663 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=1182, Invalid=16113, Unknown=1, NotChecked=260, Total=17556 [2021-11-23 13:47:34,906 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 107 mSDsluCounter, 1198 mSDsCounter, 0 mSdLazyCounter, 3848 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 1223 SdHoareTripleChecker+Invalid, 4124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 3848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-23 13:47:34,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 1223 Invalid, 4124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 3848 Invalid, 0 Unknown, 76 Unchecked, 2.7s Time] [2021-11-23 13:47:34,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-23 13:47:34,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 98. [2021-11-23 13:47:34,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 67 states have internal predecessors, (69), 7 states have call successors, (7), 3 states have call predecessors, (7), 24 states have return successors, (43), 27 states have call predecessors, (43), 7 states have call successors, (43) [2021-11-23 13:47:34,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 119 transitions. [2021-11-23 13:47:34,945 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 119 transitions. Word has length 111 [2021-11-23 13:47:34,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:47:34,946 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 119 transitions. [2021-11-23 13:47:34,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 95 states have (on average 1.4) internal successors, (133), 57 states have internal predecessors, (133), 19 states have call successors, (19), 1 states have call predecessors, (19), 30 states have return successors, (43), 42 states have call predecessors, (43), 19 states have call successors, (43) [2021-11-23 13:47:34,947 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 119 transitions. [2021-11-23 13:47:34,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-23 13:47:34,948 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:47:34,949 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 15, 15, 15, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:47:34,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-23 13:47:35,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-23 13:47:35,162 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:47:35,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:47:35,163 INFO L85 PathProgramCache]: Analyzing trace with hash -313901386, now seen corresponding path program 26 times [2021-11-23 13:47:35,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:47:35,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822903245] [2021-11-23 13:47:35,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:47:35,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:47:35,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:47:35,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-23 13:47:35,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:47:35,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:47:35,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:47:35,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:47:35,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:47:35,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:47:35,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:47:35,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-23 13:47:35,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:47:35,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:47:35,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:47:35,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:47:35,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:47:35,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:47:35,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:47:36,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:47:36,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:47:36,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:47:36,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:47:36,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:47:36,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:47:36,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:47:36,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:47:36,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:47:36,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:47:36,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:47:36,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:47:36,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:47:36,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:47:37,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:47:37,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:47:37,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:47:37,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:47:37,280 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 56 proven. 433 refuted. 0 times theorem prover too weak. 401 trivial. 0 not checked. [2021-11-23 13:47:37,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:47:37,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822903245] [2021-11-23 13:47:37,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822903245] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:47:37,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733323808] [2021-11-23 13:47:37,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 13:47:37,282 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:47:37,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:47:37,283 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:47:37,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-23 13:47:37,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 13:47:37,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:47:37,596 WARN L261 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 205 conjunts are in the unsatisfiable core [2021-11-23 13:47:37,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:47:40,429 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 12 proven. 414 refuted. 0 times theorem prover too weak. 464 trivial. 0 not checked. [2021-11-23 13:47:40,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:48:05,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733323808] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:48:05,073 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:48:05,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 34] total 72 [2021-11-23 13:48:05,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654412235] [2021-11-23 13:48:05,073 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:48:05,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-11-23 13:48:05,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:48:05,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-11-23 13:48:05,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=11365, Unknown=5, NotChecked=0, Total=11772 [2021-11-23 13:48:05,076 INFO L87 Difference]: Start difference. First operand 98 states and 119 transitions. Second operand has 72 states, 69 states have (on average 1.144927536231884) internal successors, (79), 41 states have internal predecessors, (79), 5 states have call successors, (5), 1 states have call predecessors, (5), 30 states have return successors, (31), 31 states have call predecessors, (31), 5 states have call successors, (31) [2021-11-23 13:48:08,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:48:08,584 INFO L93 Difference]: Finished difference Result 114 states and 140 transitions. [2021-11-23 13:48:08,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-23 13:48:08,590 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 69 states have (on average 1.144927536231884) internal successors, (79), 41 states have internal predecessors, (79), 5 states have call successors, (5), 1 states have call predecessors, (5), 30 states have return successors, (31), 31 states have call predecessors, (31), 5 states have call successors, (31) Word has length 125 [2021-11-23 13:48:08,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:48:08,592 INFO L225 Difference]: With dead ends: 114 [2021-11-23 13:48:08,592 INFO L226 Difference]: Without dead ends: 110 [2021-11-23 13:48:08,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 197 SyntacticMatches, 3 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3821 ImplicationChecksByTransitivity, 22.3s TimeCoverageRelationStatistics Valid=1113, Invalid=17242, Unknown=5, NotChecked=0, Total=18360 [2021-11-23 13:48:08,595 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 70 mSDsluCounter, 1113 mSDsCounter, 0 mSdLazyCounter, 2591 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 1140 SdHoareTripleChecker+Invalid, 2685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 2591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-23 13:48:08,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 1140 Invalid, 2685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 2591 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-23 13:48:08,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-23 13:48:08,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 103. [2021-11-23 13:48:08,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 69 states have (on average 1.0434782608695652) internal successors, (72), 70 states have internal predecessors, (72), 8 states have call successors, (8), 3 states have call predecessors, (8), 25 states have return successors, (49), 29 states have call predecessors, (49), 8 states have call successors, (49) [2021-11-23 13:48:08,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 129 transitions. [2021-11-23 13:48:08,607 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 129 transitions. Word has length 125 [2021-11-23 13:48:08,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:48:08,607 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 129 transitions. [2021-11-23 13:48:08,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 69 states have (on average 1.144927536231884) internal successors, (79), 41 states have internal predecessors, (79), 5 states have call successors, (5), 1 states have call predecessors, (5), 30 states have return successors, (31), 31 states have call predecessors, (31), 5 states have call successors, (31) [2021-11-23 13:48:08,608 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 129 transitions. [2021-11-23 13:48:08,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-23 13:48:08,609 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:48:08,609 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 16, 16, 16, 16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:48:08,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-23 13:48:08,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-23 13:48:08,825 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:48:08,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:48:08,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1615409644, now seen corresponding path program 27 times [2021-11-23 13:48:08,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:48:08,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103000439] [2021-11-23 13:48:08,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:48:08,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:48:08,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:08,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-23 13:48:08,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:09,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:48:09,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:09,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:48:09,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:09,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:48:09,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:09,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:48:09,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:09,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-23 13:48:09,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:09,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:48:09,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:09,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:48:09,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:09,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:48:09,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:09,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:48:09,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:09,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:48:09,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:09,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:48:09,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:10,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:48:10,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:10,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:48:10,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:10,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:48:10,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:10,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:48:10,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:10,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:48:10,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:10,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:48:10,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:10,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 60 proven. 486 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2021-11-23 13:48:10,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:48:10,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103000439] [2021-11-23 13:48:10,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103000439] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:48:10,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754518236] [2021-11-23 13:48:10,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 13:48:10,936 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:48:10,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:48:10,937 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:48:10,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-23 13:48:11,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-11-23 13:48:11,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:48:11,268 WARN L261 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 216 conjunts are in the unsatisfiable core [2021-11-23 13:48:11,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:48:14,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 34 proven. 476 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2021-11-23 13:48:14,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:48:45,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754518236] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:48:45,476 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:48:45,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 38] total 76 [2021-11-23 13:48:45,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465527847] [2021-11-23 13:48:45,477 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:48:45,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-11-23 13:48:45,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:48:45,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-11-23 13:48:45,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=422, Invalid=12228, Unknown=6, NotChecked=0, Total=12656 [2021-11-23 13:48:45,478 INFO L87 Difference]: Start difference. First operand 103 states and 129 transitions. Second operand has 76 states, 73 states have (on average 1.1643835616438356) internal successors, (85), 44 states have internal predecessors, (85), 5 states have call successors, (5), 1 states have call predecessors, (5), 32 states have return successors, (33), 32 states have call predecessors, (33), 5 states have call successors, (33) [2021-11-23 13:48:49,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:48:49,224 INFO L93 Difference]: Finished difference Result 116 states and 143 transitions. [2021-11-23 13:48:49,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-23 13:48:49,224 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 73 states have (on average 1.1643835616438356) internal successors, (85), 44 states have internal predecessors, (85), 5 states have call successors, (5), 1 states have call predecessors, (5), 32 states have return successors, (33), 32 states have call predecessors, (33), 5 states have call successors, (33) Word has length 132 [2021-11-23 13:48:49,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:48:49,225 INFO L225 Difference]: With dead ends: 116 [2021-11-23 13:48:49,225 INFO L226 Difference]: Without dead ends: 112 [2021-11-23 13:48:49,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 190 SyntacticMatches, 17 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4479 ImplicationChecksByTransitivity, 28.1s TimeCoverageRelationStatistics Valid=1161, Invalid=18293, Unknown=6, NotChecked=0, Total=19460 [2021-11-23 13:48:49,228 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 26 mSDsluCounter, 1207 mSDsCounter, 0 mSdLazyCounter, 2741 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 1235 SdHoareTripleChecker+Invalid, 2754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 2741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-23 13:48:49,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 1235 Invalid, 2754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 2741 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-23 13:48:49,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-11-23 13:48:49,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 103. [2021-11-23 13:48:49,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 69 states have (on average 1.0434782608695652) internal successors, (72), 70 states have internal predecessors, (72), 8 states have call successors, (8), 3 states have call predecessors, (8), 25 states have return successors, (49), 29 states have call predecessors, (49), 8 states have call successors, (49) [2021-11-23 13:48:49,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 129 transitions. [2021-11-23 13:48:49,242 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 129 transitions. Word has length 132 [2021-11-23 13:48:49,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:48:49,243 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 129 transitions. [2021-11-23 13:48:49,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 73 states have (on average 1.1643835616438356) internal successors, (85), 44 states have internal predecessors, (85), 5 states have call successors, (5), 1 states have call predecessors, (5), 32 states have return successors, (33), 32 states have call predecessors, (33), 5 states have call successors, (33) [2021-11-23 13:48:49,243 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 129 transitions. [2021-11-23 13:48:49,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-23 13:48:49,245 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:48:49,245 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 14, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:48:49,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-23 13:48:49,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:48:49,460 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:48:49,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:48:49,461 INFO L85 PathProgramCache]: Analyzing trace with hash -745432324, now seen corresponding path program 28 times [2021-11-23 13:48:49,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:48:49,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58469061] [2021-11-23 13:48:49,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:48:49,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:48:49,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:49,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-23 13:48:49,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:49,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:48:49,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:49,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:48:49,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:49,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-23 13:48:49,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:49,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:48:49,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:49,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:48:49,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:50,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:48:50,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:50,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:48:50,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:50,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:48:50,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:50,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:48:50,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:50,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:48:50,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:50,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:48:50,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:50,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:48:50,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:50,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:48:50,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:50,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:48:50,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:50,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:48:50,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:48:51,006 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 52 proven. 383 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2021-11-23 13:48:51,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:48:51,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58469061] [2021-11-23 13:48:51,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58469061] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:48:51,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137939538] [2021-11-23 13:48:51,007 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 13:48:51,007 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:48:51,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:48:51,008 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:48:51,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-23 13:48:51,322 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 13:48:51,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:48:51,326 WARN L261 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 193 conjunts are in the unsatisfiable core [2021-11-23 13:48:51,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:48:54,144 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 12 proven. 367 refuted. 0 times theorem prover too weak. 403 trivial. 0 not checked. [2021-11-23 13:48:54,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:49:04,679 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 47 proven. 611 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-11-23 13:49:04,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137939538] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:49:04,680 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:49:04,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 34, 51] total 104 [2021-11-23 13:49:04,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503770685] [2021-11-23 13:49:04,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:49:04,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2021-11-23 13:49:04,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:49:04,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2021-11-23 13:49:04,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=10332, Unknown=0, NotChecked=0, Total=10712 [2021-11-23 13:49:04,682 INFO L87 Difference]: Start difference. First operand 103 states and 129 transitions. Second operand has 104 states, 100 states have (on average 1.39) internal successors, (139), 59 states have internal predecessors, (139), 20 states have call successors, (20), 1 states have call predecessors, (20), 31 states have return successors, (46), 45 states have call predecessors, (46), 20 states have call successors, (46) [2021-11-23 13:49:09,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:49:09,719 INFO L93 Difference]: Finished difference Result 124 states and 155 transitions. [2021-11-23 13:49:09,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-23 13:49:09,719 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 100 states have (on average 1.39) internal successors, (139), 59 states have internal predecessors, (139), 20 states have call successors, (20), 1 states have call predecessors, (20), 31 states have return successors, (46), 45 states have call predecessors, (46), 20 states have call successors, (46) Word has length 118 [2021-11-23 13:49:09,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:49:09,721 INFO L225 Difference]: With dead ends: 124 [2021-11-23 13:49:09,721 INFO L226 Difference]: Without dead ends: 117 [2021-11-23 13:49:09,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 200 SyntacticMatches, 4 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4186 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=1288, Invalid=18172, Unknown=0, NotChecked=0, Total=19460 [2021-11-23 13:49:09,724 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 98 mSDsluCounter, 1250 mSDsCounter, 0 mSdLazyCounter, 4030 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 1277 SdHoareTripleChecker+Invalid, 4178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 4030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-23 13:49:09,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 1277 Invalid, 4178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 4030 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-11-23 13:49:09,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-11-23 13:49:09,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 104. [2021-11-23 13:49:09,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 70 states have (on average 1.042857142857143) internal successors, (73), 71 states have internal predecessors, (73), 7 states have call successors, (7), 3 states have call predecessors, (7), 26 states have return successors, (46), 29 states have call predecessors, (46), 7 states have call successors, (46) [2021-11-23 13:49:09,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 126 transitions. [2021-11-23 13:49:09,735 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 126 transitions. Word has length 118 [2021-11-23 13:49:09,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:49:09,736 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 126 transitions. [2021-11-23 13:49:09,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 100 states have (on average 1.39) internal successors, (139), 59 states have internal predecessors, (139), 20 states have call successors, (20), 1 states have call predecessors, (20), 31 states have return successors, (46), 45 states have call predecessors, (46), 20 states have call successors, (46) [2021-11-23 13:49:09,736 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 126 transitions. [2021-11-23 13:49:09,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-23 13:49:09,738 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:49:09,738 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 15, 15, 15, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:49:09,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-23 13:49:09,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-11-23 13:49:09,966 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:49:09,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:49:09,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1149117496, now seen corresponding path program 29 times [2021-11-23 13:49:09,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:49:09,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049221691] [2021-11-23 13:49:09,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:49:09,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:49:09,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:49:10,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-23 13:49:10,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:49:10,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:49:10,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:49:10,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:49:10,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:49:10,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-23 13:49:10,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:49:10,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:49:10,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:49:10,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:49:10,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:49:10,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:49:10,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:49:10,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:49:10,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:49:10,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:49:10,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:49:10,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:49:10,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:49:11,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:49:11,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:49:11,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:49:11,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:49:11,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:49:11,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:49:11,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:49:11,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:49:11,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:49:11,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:49:11,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:49:11,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:49:11,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:49:11,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:49:11,987 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 56 proven. 433 refuted. 0 times theorem prover too weak. 401 trivial. 0 not checked. [2021-11-23 13:49:11,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:49:11,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049221691] [2021-11-23 13:49:11,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049221691] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:49:11,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315795730] [2021-11-23 13:49:11,987 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 13:49:11,987 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:49:11,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:49:11,991 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:49:11,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-23 13:49:12,309 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-11-23 13:49:12,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:49:12,313 WARN L261 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 205 conjunts are in the unsatisfiable core [2021-11-23 13:49:12,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:49:14,718 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 27 proven. 403 refuted. 0 times theorem prover too weak. 460 trivial. 0 not checked. [2021-11-23 13:49:14,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:49:25,580 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 51 proven. 700 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-11-23 13:49:25,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315795730] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:49:25,582 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:49:25,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 36, 54] total 110 [2021-11-23 13:49:25,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423309205] [2021-11-23 13:49:25,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:49:25,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2021-11-23 13:49:25,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:49:25,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2021-11-23 13:49:25,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=11588, Unknown=0, NotChecked=0, Total=11990 [2021-11-23 13:49:25,585 INFO L87 Difference]: Start difference. First operand 104 states and 126 transitions. Second operand has 110 states, 106 states have (on average 1.4150943396226414) internal successors, (150), 62 states have internal predecessors, (150), 21 states have call successors, (21), 1 states have call predecessors, (21), 33 states have return successors, (49), 48 states have call predecessors, (49), 21 states have call successors, (49) [2021-11-23 13:49:29,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:49:29,892 INFO L93 Difference]: Finished difference Result 128 states and 159 transitions. [2021-11-23 13:49:29,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-23 13:49:29,892 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 106 states have (on average 1.4150943396226414) internal successors, (150), 62 states have internal predecessors, (150), 21 states have call successors, (21), 1 states have call predecessors, (21), 33 states have return successors, (49), 48 states have call predecessors, (49), 21 states have call successors, (49) Word has length 125 [2021-11-23 13:49:29,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:49:29,893 INFO L225 Difference]: With dead ends: 128 [2021-11-23 13:49:29,893 INFO L226 Difference]: Without dead ends: 121 [2021-11-23 13:49:29,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 197 SyntacticMatches, 19 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5329 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=1400, Invalid=20356, Unknown=0, NotChecked=0, Total=21756 [2021-11-23 13:49:29,895 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 56 mSDsluCounter, 1189 mSDsCounter, 0 mSdLazyCounter, 3920 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 1217 SdHoareTripleChecker+Invalid, 4018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 3920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-23 13:49:29,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 1217 Invalid, 4018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 3920 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-11-23 13:49:29,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-11-23 13:49:29,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 110. [2021-11-23 13:49:29,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 75 states have internal predecessors, (77), 7 states have call successors, (7), 3 states have call predecessors, (7), 28 states have return successors, (49), 31 states have call predecessors, (49), 7 states have call successors, (49) [2021-11-23 13:49:29,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 133 transitions. [2021-11-23 13:49:29,902 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 133 transitions. Word has length 125 [2021-11-23 13:49:29,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:49:29,903 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 133 transitions. [2021-11-23 13:49:29,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 106 states have (on average 1.4150943396226414) internal successors, (150), 62 states have internal predecessors, (150), 21 states have call successors, (21), 1 states have call predecessors, (21), 33 states have return successors, (49), 48 states have call predecessors, (49), 21 states have call successors, (49) [2021-11-23 13:49:29,903 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 133 transitions. [2021-11-23 13:49:29,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-23 13:49:29,904 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:49:29,904 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 17, 17, 17, 17, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:49:29,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-23 13:49:30,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-11-23 13:49:30,119 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:49:30,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:49:30,119 INFO L85 PathProgramCache]: Analyzing trace with hash -742889082, now seen corresponding path program 30 times [2021-11-23 13:49:30,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:49:30,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245565841] [2021-11-23 13:49:30,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:49:30,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:49:30,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:49:30,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-23 13:49:30,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:49:30,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:49:30,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:49:30,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:49:30,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:49:30,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:49:30,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:49:30,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-23 13:49:30,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:49:30,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:49:30,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:49:30,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:49:30,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:49:30,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:49:30,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:49:30,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:49:30,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:49:30,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:49:30,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:49:31,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:49:31,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:49:31,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:49:31,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:49:31,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:49:31,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:49:31,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:49:31,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:49:31,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:49:31,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:49:31,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:49:31,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:49:31,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:49:31,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:49:31,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:49:31,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:49:32,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:49:32,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:49:32,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1127 backedges. 64 proven. 542 refuted. 0 times theorem prover too weak. 521 trivial. 0 not checked. [2021-11-23 13:49:32,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:49:32,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245565841] [2021-11-23 13:49:32,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245565841] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:49:32,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262509079] [2021-11-23 13:49:32,079 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 13:49:32,079 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:49:32,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:49:32,081 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:49:32,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-23 13:49:32,418 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-11-23 13:49:32,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:49:32,424 WARN L261 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 229 conjunts are in the unsatisfiable core [2021-11-23 13:49:32,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:49:35,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1127 backedges. 29 proven. 507 refuted. 0 times theorem prover too weak. 591 trivial. 0 not checked. [2021-11-23 13:49:35,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:50:03,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262509079] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:50:03,591 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:50:03,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 38] total 80 [2021-11-23 13:50:03,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266708371] [2021-11-23 13:50:03,592 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:50:03,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-11-23 13:50:03,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:50:03,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-11-23 13:50:03,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=446, Invalid=14070, Unknown=4, NotChecked=0, Total=14520 [2021-11-23 13:50:03,595 INFO L87 Difference]: Start difference. First operand 110 states and 133 transitions. Second operand has 80 states, 77 states have (on average 1.1428571428571428) internal successors, (88), 45 states have internal predecessors, (88), 5 states have call successors, (5), 1 states have call predecessors, (5), 34 states have return successors, (35), 35 states have call predecessors, (35), 5 states have call successors, (35) [2021-11-23 13:50:06,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:50:06,855 INFO L93 Difference]: Finished difference Result 126 states and 154 transitions. [2021-11-23 13:50:06,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-23 13:50:06,855 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 77 states have (on average 1.1428571428571428) internal successors, (88), 45 states have internal predecessors, (88), 5 states have call successors, (5), 1 states have call predecessors, (5), 34 states have return successors, (35), 35 states have call predecessors, (35), 5 states have call successors, (35) Word has length 139 [2021-11-23 13:50:06,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:50:06,856 INFO L225 Difference]: With dead ends: 126 [2021-11-23 13:50:06,856 INFO L226 Difference]: Without dead ends: 122 [2021-11-23 13:50:06,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 205 SyntacticMatches, 19 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5527 ImplicationChecksByTransitivity, 24.5s TimeCoverageRelationStatistics Valid=1325, Invalid=21623, Unknown=4, NotChecked=0, Total=22952 [2021-11-23 13:50:06,860 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 28 mSDsluCounter, 1130 mSDsCounter, 0 mSdLazyCounter, 2711 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 1159 SdHoareTripleChecker+Invalid, 2729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 2711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-23 13:50:06,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 1159 Invalid, 2729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 2711 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-23 13:50:06,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-23 13:50:06,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 115. [2021-11-23 13:50:06,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 77 states have (on average 1.0389610389610389) internal successors, (80), 78 states have internal predecessors, (80), 8 states have call successors, (8), 3 states have call predecessors, (8), 29 states have return successors, (55), 33 states have call predecessors, (55), 8 states have call successors, (55) [2021-11-23 13:50:06,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 143 transitions. [2021-11-23 13:50:06,873 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 143 transitions. Word has length 139 [2021-11-23 13:50:06,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:50:06,873 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 143 transitions. [2021-11-23 13:50:06,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 77 states have (on average 1.1428571428571428) internal successors, (88), 45 states have internal predecessors, (88), 5 states have call successors, (5), 1 states have call predecessors, (5), 34 states have return successors, (35), 35 states have call predecessors, (35), 5 states have call successors, (35) [2021-11-23 13:50:06,874 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 143 transitions. [2021-11-23 13:50:06,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-23 13:50:06,876 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:50:06,876 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 18, 18, 18, 18, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:50:06,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-23 13:50:07,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:50:07,098 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:50:07,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:50:07,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1817871932, now seen corresponding path program 31 times [2021-11-23 13:50:07,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:50:07,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853482847] [2021-11-23 13:50:07,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:50:07,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:50:07,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:50:07,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-23 13:50:07,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:50:07,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:50:07,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:50:07,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:50:07,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:50:07,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:50:07,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:50:07,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:50:07,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:50:07,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-23 13:50:07,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:50:07,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:50:07,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:50:07,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:50:07,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:50:07,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:50:07,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:50:07,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:50:07,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:50:08,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:50:08,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:50:08,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:50:08,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:50:08,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:50:08,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:50:08,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:50:08,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:50:08,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:50:08,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:50:08,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:50:08,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:50:08,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:50:08,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:50:08,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:50:08,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:50:09,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:50:09,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:50:09,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:50:09,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:50:09,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1256 backedges. 68 proven. 601 refuted. 0 times theorem prover too weak. 587 trivial. 0 not checked. [2021-11-23 13:50:09,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:50:09,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853482847] [2021-11-23 13:50:09,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853482847] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:50:09,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082076853] [2021-11-23 13:50:09,244 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 13:50:09,244 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:50:09,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:50:09,245 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:50:09,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-23 13:50:09,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:50:09,603 WARN L261 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 241 conjunts are in the unsatisfiable core [2021-11-23 13:50:09,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:50:13,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1256 backedges. 14 proven. 577 refuted. 0 times theorem prover too weak. 665 trivial. 0 not checked. [2021-11-23 13:50:13,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:50:44,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082076853] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:50:44,388 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:50:44,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 38] total 82 [2021-11-23 13:50:44,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327142384] [2021-11-23 13:50:44,388 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:50:44,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-11-23 13:50:44,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:50:44,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-11-23 13:50:44,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=454, Invalid=14545, Unknown=7, NotChecked=0, Total=15006 [2021-11-23 13:50:44,391 INFO L87 Difference]: Start difference. First operand 115 states and 143 transitions. Second operand has 82 states, 79 states have (on average 1.1265822784810127) internal successors, (89), 46 states have internal predecessors, (89), 5 states have call successors, (5), 1 states have call predecessors, (5), 35 states have return successors, (36), 36 states have call predecessors, (36), 5 states have call successors, (36) [2021-11-23 13:50:48,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:50:48,739 INFO L93 Difference]: Finished difference Result 128 states and 157 transitions. [2021-11-23 13:50:48,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-23 13:50:48,740 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 79 states have (on average 1.1265822784810127) internal successors, (89), 46 states have internal predecessors, (89), 5 states have call successors, (5), 1 states have call predecessors, (5), 35 states have return successors, (36), 36 states have call predecessors, (36), 5 states have call successors, (36) Word has length 146 [2021-11-23 13:50:48,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:50:48,741 INFO L225 Difference]: With dead ends: 128 [2021-11-23 13:50:48,741 INFO L226 Difference]: Without dead ends: 124 [2021-11-23 13:50:48,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 230 SyntacticMatches, 3 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4796 ImplicationChecksByTransitivity, 27.8s TimeCoverageRelationStatistics Valid=1335, Invalid=22220, Unknown=7, NotChecked=0, Total=23562 [2021-11-23 13:50:48,744 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 56 mSDsluCounter, 1467 mSDsCounter, 0 mSdLazyCounter, 3494 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 1497 SdHoareTripleChecker+Invalid, 3568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 3494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:50:48,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 1497 Invalid, 3568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 3494 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-23 13:50:48,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-11-23 13:50:48,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 115. [2021-11-23 13:50:48,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 77 states have (on average 1.0389610389610389) internal successors, (80), 78 states have internal predecessors, (80), 8 states have call successors, (8), 3 states have call predecessors, (8), 29 states have return successors, (55), 33 states have call predecessors, (55), 8 states have call successors, (55) [2021-11-23 13:50:48,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 143 transitions. [2021-11-23 13:50:48,757 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 143 transitions. Word has length 146 [2021-11-23 13:50:48,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:50:48,758 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 143 transitions. [2021-11-23 13:50:48,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 79 states have (on average 1.1265822784810127) internal successors, (89), 46 states have internal predecessors, (89), 5 states have call successors, (5), 1 states have call predecessors, (5), 35 states have return successors, (36), 36 states have call predecessors, (36), 5 states have call successors, (36) [2021-11-23 13:50:48,759 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 143 transitions. [2021-11-23 13:50:48,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-23 13:50:48,760 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:50:48,760 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 19, 19, 19, 19, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:50:48,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-23 13:50:48,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:50:48,986 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:50:48,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:50:48,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1882563946, now seen corresponding path program 32 times [2021-11-23 13:50:48,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:50:48,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968669027] [2021-11-23 13:50:48,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:50:48,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:50:49,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:50:49,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-23 13:50:49,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:50:49,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:50:49,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:50:49,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:50:49,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:50:49,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:50:49,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:50:49,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:50:49,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:50:49,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:50:49,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:50:49,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-23 13:50:49,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:50:49,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:50:49,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:50:49,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:50:49,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:50:49,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:50:49,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:50:50,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:50:50,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:50:50,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:50:50,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:50:50,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:50:50,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:50:50,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:50:50,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:50:50,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:50:50,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:50:50,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:50:50,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:50:50,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:50:50,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:50:50,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:50:50,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:50:51,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:50:51,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:50:51,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:50:51,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:50:51,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:50:51,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:50:51,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1392 backedges. 72 proven. 663 refuted. 0 times theorem prover too weak. 657 trivial. 0 not checked. [2021-11-23 13:50:51,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:50:51,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968669027] [2021-11-23 13:50:51,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968669027] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:50:51,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287394313] [2021-11-23 13:50:51,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 13:50:51,345 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:50:51,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:50:51,346 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:50:51,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-23 13:50:51,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 13:50:51,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:50:51,740 WARN L261 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 253 conjunts are in the unsatisfiable core [2021-11-23 13:50:51,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:50:55,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1392 backedges. 14 proven. 636 refuted. 0 times theorem prover too weak. 742 trivial. 0 not checked. [2021-11-23 13:50:55,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:51:35,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287394313] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:51:35,414 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:51:35,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 38] total 84 [2021-11-23 13:51:35,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413993840] [2021-11-23 13:51:35,414 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:51:35,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2021-11-23 13:51:35,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:51:35,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-11-23 13:51:35,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=462, Invalid=15031, Unknown=7, NotChecked=0, Total=15500 [2021-11-23 13:51:35,417 INFO L87 Difference]: Start difference. First operand 115 states and 143 transitions. Second operand has 84 states, 81 states have (on average 1.123456790123457) internal successors, (91), 47 states have internal predecessors, (91), 5 states have call successors, (5), 1 states have call predecessors, (5), 36 states have return successors, (37), 37 states have call predecessors, (37), 5 states have call successors, (37) [2021-11-23 13:51:40,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:51:40,067 INFO L93 Difference]: Finished difference Result 128 states and 157 transitions. [2021-11-23 13:51:40,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-23 13:51:40,068 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 81 states have (on average 1.123456790123457) internal successors, (91), 47 states have internal predecessors, (91), 5 states have call successors, (5), 1 states have call predecessors, (5), 36 states have return successors, (37), 37 states have call predecessors, (37), 5 states have call successors, (37) Word has length 153 [2021-11-23 13:51:40,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:51:40,071 INFO L225 Difference]: With dead ends: 128 [2021-11-23 13:51:40,071 INFO L226 Difference]: Without dead ends: 124 [2021-11-23 13:51:40,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 238 SyntacticMatches, 4 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4875 ImplicationChecksByTransitivity, 36.3s TimeCoverageRelationStatistics Valid=1345, Invalid=22828, Unknown=7, NotChecked=0, Total=24180 [2021-11-23 13:51:40,072 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 30 mSDsluCounter, 1455 mSDsCounter, 0 mSdLazyCounter, 3403 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 1485 SdHoareTripleChecker+Invalid, 3418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 3403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-23 13:51:40,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 1485 Invalid, 3418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 3403 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-23 13:51:40,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-11-23 13:51:40,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 115. [2021-11-23 13:51:40,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 77 states have (on average 1.0389610389610389) internal successors, (80), 78 states have internal predecessors, (80), 8 states have call successors, (8), 3 states have call predecessors, (8), 29 states have return successors, (55), 33 states have call predecessors, (55), 8 states have call successors, (55) [2021-11-23 13:51:40,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 143 transitions. [2021-11-23 13:51:40,081 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 143 transitions. Word has length 153 [2021-11-23 13:51:40,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:51:40,082 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 143 transitions. [2021-11-23 13:51:40,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 81 states have (on average 1.123456790123457) internal successors, (91), 47 states have internal predecessors, (91), 5 states have call successors, (5), 1 states have call predecessors, (5), 36 states have return successors, (37), 37 states have call predecessors, (37), 5 states have call successors, (37) [2021-11-23 13:51:40,082 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 143 transitions. [2021-11-23 13:51:40,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-23 13:51:40,083 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:51:40,083 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 16, 16, 16, 16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:51:40,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-23 13:51:40,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:51:40,298 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:51:40,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:51:40,298 INFO L85 PathProgramCache]: Analyzing trace with hash 502125388, now seen corresponding path program 33 times [2021-11-23 13:51:40,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:51:40,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575233647] [2021-11-23 13:51:40,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:51:40,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:51:40,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:51:40,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-23 13:51:40,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:51:40,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:51:40,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:51:40,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:51:40,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:51:40,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-23 13:51:40,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:51:40,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:51:40,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:51:40,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:51:40,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:51:40,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:51:40,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:51:40,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:51:40,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:51:41,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:51:41,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:51:41,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:51:41,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:51:41,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:51:41,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:51:41,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:51:41,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:51:41,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:51:41,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:51:41,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:51:41,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:51:41,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:51:41,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:51:42,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:51:42,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:51:42,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:51:42,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:51:42,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-23 13:51:42,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:51:42,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 60 proven. 486 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2021-11-23 13:51:42,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:51:42,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575233647] [2021-11-23 13:51:42,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575233647] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:51:42,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877033433] [2021-11-23 13:51:42,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 13:51:42,316 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:51:42,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:51:42,317 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:51:42,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e79cc18-ac80-4744-84af-a5ae9201677c/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-23 13:51:42,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-11-23 13:51:42,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:51:42,769 WARN L261 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 217 conjunts are in the unsatisfiable core [2021-11-23 13:51:42,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:51:45,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 14 proven. 468 refuted. 0 times theorem prover too weak. 523 trivial. 0 not checked. [2021-11-23 13:51:45,970 INFO L328 TraceCheckSpWp]: Computing backward predicates...