./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--ems_usb.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--ems_usb.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY --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 64bit --witnessprinter.graph.data.programhash be936ec9376452d086f72aa92ac4fe7deb233a068e40e0ed8f478fbc228d19b6 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 08:02:45,655 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 08:02:45,657 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 08:02:45,691 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 08:02:45,694 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 08:02:45,695 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 08:02:45,699 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 08:02:45,705 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 08:02:45,708 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 08:02:45,710 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 08:02:45,711 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 08:02:45,715 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 08:02:45,715 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 08:02:45,721 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 08:02:45,723 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 08:02:45,727 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 08:02:45,729 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 08:02:45,731 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 08:02:45,737 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 08:02:45,742 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 08:02:45,746 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 08:02:45,747 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 08:02:45,751 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 08:02:45,752 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 08:02:45,762 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 08:02:45,764 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 08:02:45,765 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 08:02:45,767 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 08:02:45,768 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 08:02:45,769 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 08:02:45,770 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 08:02:45,771 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 08:02:45,774 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 08:02:45,775 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 08:02:45,777 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 08:02:45,777 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 08:02:45,778 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 08:02:45,778 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 08:02:45,779 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 08:02:45,780 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 08:02:45,781 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 08:02:45,781 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-07 08:02:45,827 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 08:02:45,830 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 08:02:45,831 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 08:02:45,831 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 08:02:45,837 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 08:02:45,838 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 08:02:45,838 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 08:02:45,838 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 08:02:45,839 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 08:02:45,839 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 08:02:45,839 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 08:02:45,839 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 08:02:45,839 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 08:02:45,840 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 08:02:45,840 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 08:02:45,840 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 08:02:45,840 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 08:02:45,841 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 08:02:45,841 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 08:02:45,841 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:02:45,841 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 08:02:45,842 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 08:02:45,842 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 08:02:45,842 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 08:02:45,842 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 08:02:45,843 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 08:02:45,843 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 08:02:45,843 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 08:02:45,843 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 08:02:45,843 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_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be936ec9376452d086f72aa92ac4fe7deb233a068e40e0ed8f478fbc228d19b6 [2021-11-07 08:02:46,134 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 08:02:46,164 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 08:02:46,167 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 08:02:46,169 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 08:02:46,170 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 08:02:46,171 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--ems_usb.ko-entry_point.cil.out.i [2021-11-07 08:02:46,266 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/data/5f8f65131/01bb5fae6a6e4315bca7ab8c45f02c64/FLAG75910291f [2021-11-07 08:02:47,147 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 08:02:47,148 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--ems_usb.ko-entry_point.cil.out.i [2021-11-07 08:02:47,194 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/data/5f8f65131/01bb5fae6a6e4315bca7ab8c45f02c64/FLAG75910291f [2021-11-07 08:02:47,639 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/data/5f8f65131/01bb5fae6a6e4315bca7ab8c45f02c64 [2021-11-07 08:02:47,641 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 08:02:47,643 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 08:02:47,644 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 08:02:47,645 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 08:02:47,648 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 08:02:47,649 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:02:47" (1/1) ... [2021-11-07 08:02:47,651 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44393be5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:02:47, skipping insertion in model container [2021-11-07 08:02:47,651 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:02:47" (1/1) ... [2021-11-07 08:02:47,662 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 08:02:47,764 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 08:02:48,935 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--ems_usb.ko-entry_point.cil.out.i[164250,164263] [2021-11-07 08:02:49,428 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:02:49,477 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 08:02:49,689 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--ems_usb.ko-entry_point.cil.out.i[164250,164263] [2021-11-07 08:02:49,829 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:02:49,894 INFO L208 MainTranslator]: Completed translation [2021-11-07 08:02:49,894 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:02:49 WrapperNode [2021-11-07 08:02:49,895 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 08:02:49,896 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 08:02:49,896 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 08:02:49,896 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 08:02:49,905 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:02:49" (1/1) ... [2021-11-07 08:02:49,974 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:02:49" (1/1) ... [2021-11-07 08:02:50,181 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 08:02:50,182 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 08:02:50,183 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 08:02:50,183 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 08:02:50,193 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:02:49" (1/1) ... [2021-11-07 08:02:50,193 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:02:49" (1/1) ... [2021-11-07 08:02:50,235 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:02:49" (1/1) ... [2021-11-07 08:02:50,239 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:02:49" (1/1) ... [2021-11-07 08:02:50,392 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:02:49" (1/1) ... [2021-11-07 08:02:50,432 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:02:49" (1/1) ... [2021-11-07 08:02:50,457 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:02:49" (1/1) ... [2021-11-07 08:02:50,479 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 08:02:50,480 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 08:02:50,480 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 08:02:50,480 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 08:02:50,481 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:02:49" (1/1) ... [2021-11-07 08:02:50,491 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:02:50,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:02:50,529 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 08:02:50,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 08:02:50,603 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-07 08:02:50,603 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_4 [2021-11-07 08:02:50,603 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_4 [2021-11-07 08:02:50,605 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_2 [2021-11-07 08:02:50,605 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_2 [2021-11-07 08:02:50,605 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-07 08:02:50,605 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-07 08:02:50,606 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-07 08:02:50,606 INFO L130 BoogieDeclarations]: Found specification of procedure ems_usb_read_bulk_callback [2021-11-07 08:02:50,606 INFO L138 BoogieDeclarations]: Found implementation of procedure ems_usb_read_bulk_callback [2021-11-07 08:02:50,606 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_urb [2021-11-07 08:02:50,606 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_urb [2021-11-07 08:02:50,607 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-07 08:02:50,607 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 08:02:50,607 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 08:02:50,607 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 08:02:50,608 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-07 08:02:50,608 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-07 08:02:50,608 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 08:02:50,608 INFO L130 BoogieDeclarations]: Found specification of procedure ems_usb_read_interrupt_callback [2021-11-07 08:02:50,608 INFO L138 BoogieDeclarations]: Found implementation of procedure ems_usb_read_interrupt_callback [2021-11-07 08:02:50,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 08:02:50,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 08:02:50,610 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 08:02:50,610 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-07 08:02:50,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 08:02:50,610 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 08:02:59,405 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 08:02:59,405 INFO L299 CfgBuilder]: Removed 593 assume(true) statements. [2021-11-07 08:02:59,409 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:02:59 BoogieIcfgContainer [2021-11-07 08:02:59,409 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 08:02:59,411 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 08:02:59,412 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 08:02:59,417 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 08:02:59,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:02:47" (1/3) ... [2021-11-07 08:02:59,418 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13d62155 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:02:59, skipping insertion in model container [2021-11-07 08:02:59,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:02:49" (2/3) ... [2021-11-07 08:02:59,419 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13d62155 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:02:59, skipping insertion in model container [2021-11-07 08:02:59,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:02:59" (3/3) ... [2021-11-07 08:02:59,421 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--ems_usb.ko-entry_point.cil.out.i [2021-11-07 08:02:59,427 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 08:02:59,427 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-07 08:02:59,492 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 08:02:59,501 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 [2021-11-07 08:02:59,502 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-07 08:02:59,557 INFO L276 IsEmpty]: Start isEmpty. Operand has 620 states, 597 states have (on average 1.4321608040201006) internal successors, (855), 604 states have internal predecessors, (855), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-07 08:02:59,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 08:02:59,566 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:02:59,567 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:02:59,568 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 08:02:59,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:02:59,575 INFO L85 PathProgramCache]: Analyzing trace with hash 990042253, now seen corresponding path program 1 times [2021-11-07 08:02:59,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:02:59,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307791082] [2021-11-07 08:02:59,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:02:59,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:02:59,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:00,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:03:00,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:03:00,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307791082] [2021-11-07 08:03:00,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307791082] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:03:00,171 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:03:00,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:03:00,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077277523] [2021-11-07 08:03:00,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:03:00,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:03:00,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:03:00,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:03:00,203 INFO L87 Difference]: Start difference. First operand has 620 states, 597 states have (on average 1.4321608040201006) internal successors, (855), 604 states have internal predecessors, (855), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:03:01,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:03:01,713 INFO L93 Difference]: Finished difference Result 1806 states and 2584 transitions. [2021-11-07 08:03:01,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:03:01,715 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-07 08:03:01,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:03:01,739 INFO L225 Difference]: With dead ends: 1806 [2021-11-07 08:03:01,739 INFO L226 Difference]: Without dead ends: 1173 [2021-11-07 08:03:01,750 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:03:01,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2021-11-07 08:03:01,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 1173. [2021-11-07 08:03:01,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1173 states, 1134 states have (on average 1.3915343915343916) internal successors, (1578), 1142 states have internal predecessors, (1578), 22 states have call successors, (22), 12 states have call predecessors, (22), 12 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-07 08:03:01,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1173 states to 1173 states and 1622 transitions. [2021-11-07 08:03:01,919 INFO L78 Accepts]: Start accepts. Automaton has 1173 states and 1622 transitions. Word has length 17 [2021-11-07 08:03:01,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:03:01,920 INFO L470 AbstractCegarLoop]: Abstraction has 1173 states and 1622 transitions. [2021-11-07 08:03:01,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:03:01,921 INFO L276 IsEmpty]: Start isEmpty. Operand 1173 states and 1622 transitions. [2021-11-07 08:03:01,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 08:03:01,925 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:03:01,925 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:03:01,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 08:03:01,930 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 08:03:01,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:03:01,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1542514015, now seen corresponding path program 1 times [2021-11-07 08:03:01,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:03:01,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85423780] [2021-11-07 08:03:01,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:03:01,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:03:02,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:02,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:03:02,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:03:02,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85423780] [2021-11-07 08:03:02,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85423780] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:03:02,228 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:03:02,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 08:03:02,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717855492] [2021-11-07 08:03:02,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:03:02,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:03:02,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:03:02,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:03:02,233 INFO L87 Difference]: Start difference. First operand 1173 states and 1622 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:03:02,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:03:02,544 INFO L93 Difference]: Finished difference Result 3491 states and 4901 transitions. [2021-11-07 08:03:02,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:03:02,545 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-07 08:03:02,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:03:02,569 INFO L225 Difference]: With dead ends: 3491 [2021-11-07 08:03:02,570 INFO L226 Difference]: Without dead ends: 2331 [2021-11-07 08:03:02,574 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:03:02,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2331 states. [2021-11-07 08:03:02,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2331 to 2319. [2021-11-07 08:03:02,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2319 states, 2246 states have (on average 1.3864648263579697) internal successors, (3114), 2258 states have internal predecessors, (3114), 44 states have call successors, (44), 24 states have call predecessors, (44), 24 states have return successors, (66), 40 states have call predecessors, (66), 44 states have call successors, (66) [2021-11-07 08:03:02,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2319 states to 2319 states and 3224 transitions. [2021-11-07 08:03:02,700 INFO L78 Accepts]: Start accepts. Automaton has 2319 states and 3224 transitions. Word has length 24 [2021-11-07 08:03:02,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:03:02,701 INFO L470 AbstractCegarLoop]: Abstraction has 2319 states and 3224 transitions. [2021-11-07 08:03:02,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:03:02,702 INFO L276 IsEmpty]: Start isEmpty. Operand 2319 states and 3224 transitions. [2021-11-07 08:03:02,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-07 08:03:02,710 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:03:02,711 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:03:02,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 08:03:02,715 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 08:03:02,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:03:02,722 INFO L85 PathProgramCache]: Analyzing trace with hash -573293837, now seen corresponding path program 1 times [2021-11-07 08:03:02,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:03:02,722 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858143177] [2021-11-07 08:03:02,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:03:02,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:03:02,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:02,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:03:02,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:03:02,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858143177] [2021-11-07 08:03:02,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858143177] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:03:02,905 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:03:02,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 08:03:02,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076285147] [2021-11-07 08:03:02,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:03:02,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:03:02,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:03:02,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:03:02,908 INFO L87 Difference]: Start difference. First operand 2319 states and 3224 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:03:03,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:03:03,006 INFO L93 Difference]: Finished difference Result 2319 states and 3224 transitions. [2021-11-07 08:03:03,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:03:03,007 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-07 08:03:03,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:03:03,023 INFO L225 Difference]: With dead ends: 2319 [2021-11-07 08:03:03,024 INFO L226 Difference]: Without dead ends: 2317 [2021-11-07 08:03:03,025 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:03:03,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2317 states. [2021-11-07 08:03:03,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2317 to 2317. [2021-11-07 08:03:03,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2317 states, 2245 states have (on average 1.3861915367483295) internal successors, (3112), 2256 states have internal predecessors, (3112), 44 states have call successors, (44), 24 states have call predecessors, (44), 24 states have return successors, (66), 40 states have call predecessors, (66), 44 states have call successors, (66) [2021-11-07 08:03:03,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 3222 transitions. [2021-11-07 08:03:03,167 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 3222 transitions. Word has length 25 [2021-11-07 08:03:03,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:03:03,168 INFO L470 AbstractCegarLoop]: Abstraction has 2317 states and 3222 transitions. [2021-11-07 08:03:03,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:03:03,169 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 3222 transitions. [2021-11-07 08:03:03,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-07 08:03:03,170 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:03:03,170 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:03:03,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 08:03:03,170 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 08:03:03,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:03:03,171 INFO L85 PathProgramCache]: Analyzing trace with hash -592239381, now seen corresponding path program 1 times [2021-11-07 08:03:03,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:03:03,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146195839] [2021-11-07 08:03:03,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:03:03,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:03:03,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:03,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:03:03,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:03:03,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146195839] [2021-11-07 08:03:03,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146195839] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:03:03,332 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:03:03,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 08:03:03,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564587600] [2021-11-07 08:03:03,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:03:03,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:03:03,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:03:03,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:03:03,340 INFO L87 Difference]: Start difference. First operand 2317 states and 3222 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:03:03,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:03:03,444 INFO L93 Difference]: Finished difference Result 2317 states and 3222 transitions. [2021-11-07 08:03:03,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:03:03,444 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-07 08:03:03,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:03:03,459 INFO L225 Difference]: With dead ends: 2317 [2021-11-07 08:03:03,459 INFO L226 Difference]: Without dead ends: 2315 [2021-11-07 08:03:03,463 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:03:03,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2315 states. [2021-11-07 08:03:03,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2315 to 2315. [2021-11-07 08:03:03,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2315 states, 2244 states have (on average 1.3859180035650625) internal successors, (3110), 2254 states have internal predecessors, (3110), 44 states have call successors, (44), 24 states have call predecessors, (44), 24 states have return successors, (66), 40 states have call predecessors, (66), 44 states have call successors, (66) [2021-11-07 08:03:03,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2315 states to 2315 states and 3220 transitions. [2021-11-07 08:03:03,639 INFO L78 Accepts]: Start accepts. Automaton has 2315 states and 3220 transitions. Word has length 26 [2021-11-07 08:03:03,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:03:03,640 INFO L470 AbstractCegarLoop]: Abstraction has 2315 states and 3220 transitions. [2021-11-07 08:03:03,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:03:03,640 INFO L276 IsEmpty]: Start isEmpty. Operand 2315 states and 3220 transitions. [2021-11-07 08:03:03,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-07 08:03:03,642 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:03:03,642 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:03:03,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 08:03:03,642 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 08:03:03,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:03:03,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1179551235, now seen corresponding path program 1 times [2021-11-07 08:03:03,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:03:03,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77301246] [2021-11-07 08:03:03,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:03:03,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:03:03,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:03,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:03:03,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:03:03,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77301246] [2021-11-07 08:03:03,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77301246] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:03:03,819 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:03:03,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 08:03:03,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208278111] [2021-11-07 08:03:03,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:03:03,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:03:03,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:03:03,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:03:03,822 INFO L87 Difference]: Start difference. First operand 2315 states and 3220 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:03:03,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:03:03,926 INFO L93 Difference]: Finished difference Result 2315 states and 3220 transitions. [2021-11-07 08:03:03,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:03:03,927 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-07 08:03:03,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:03:03,946 INFO L225 Difference]: With dead ends: 2315 [2021-11-07 08:03:03,946 INFO L226 Difference]: Without dead ends: 2313 [2021-11-07 08:03:03,948 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:03:03,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2313 states. [2021-11-07 08:03:04,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2313 to 2313. [2021-11-07 08:03:04,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2313 states, 2243 states have (on average 1.3856442264823896) internal successors, (3108), 2252 states have internal predecessors, (3108), 44 states have call successors, (44), 24 states have call predecessors, (44), 24 states have return successors, (66), 40 states have call predecessors, (66), 44 states have call successors, (66) [2021-11-07 08:03:04,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2313 states to 2313 states and 3218 transitions. [2021-11-07 08:03:04,076 INFO L78 Accepts]: Start accepts. Automaton has 2313 states and 3218 transitions. Word has length 27 [2021-11-07 08:03:04,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:03:04,076 INFO L470 AbstractCegarLoop]: Abstraction has 2313 states and 3218 transitions. [2021-11-07 08:03:04,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:03:04,081 INFO L276 IsEmpty]: Start isEmpty. Operand 2313 states and 3218 transitions. [2021-11-07 08:03:04,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-07 08:03:04,083 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:03:04,083 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:03:04,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 08:03:04,083 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 08:03:04,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:03:04,084 INFO L85 PathProgramCache]: Analyzing trace with hash 2088617781, now seen corresponding path program 1 times [2021-11-07 08:03:04,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:03:04,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483766163] [2021-11-07 08:03:04,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:03:04,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:03:04,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:04,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:03:04,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:03:04,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483766163] [2021-11-07 08:03:04,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483766163] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:03:04,225 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:03:04,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 08:03:04,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305076319] [2021-11-07 08:03:04,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:03:04,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:03:04,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:03:04,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:03:04,228 INFO L87 Difference]: Start difference. First operand 2313 states and 3218 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:03:04,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:03:04,325 INFO L93 Difference]: Finished difference Result 2313 states and 3218 transitions. [2021-11-07 08:03:04,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:03:04,325 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-07 08:03:04,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:03:04,341 INFO L225 Difference]: With dead ends: 2313 [2021-11-07 08:03:04,342 INFO L226 Difference]: Without dead ends: 2304 [2021-11-07 08:03:04,343 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:03:04,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2304 states. [2021-11-07 08:03:04,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2304 to 2304. [2021-11-07 08:03:04,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2304 states, 2235 states have (on average 1.385234899328859) internal successors, (3096), 2243 states have internal predecessors, (3096), 44 states have call successors, (44), 24 states have call predecessors, (44), 24 states have return successors, (66), 40 states have call predecessors, (66), 44 states have call successors, (66) [2021-11-07 08:03:04,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2304 states to 2304 states and 3206 transitions. [2021-11-07 08:03:04,520 INFO L78 Accepts]: Start accepts. Automaton has 2304 states and 3206 transitions. Word has length 28 [2021-11-07 08:03:04,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:03:04,521 INFO L470 AbstractCegarLoop]: Abstraction has 2304 states and 3206 transitions. [2021-11-07 08:03:04,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:03:04,521 INFO L276 IsEmpty]: Start isEmpty. Operand 2304 states and 3206 transitions. [2021-11-07 08:03:04,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 08:03:04,525 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:03:04,526 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:03:04,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 08:03:04,526 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 08:03:04,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:03:04,527 INFO L85 PathProgramCache]: Analyzing trace with hash 578971499, now seen corresponding path program 1 times [2021-11-07 08:03:04,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:03:04,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491749087] [2021-11-07 08:03:04,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:03:04,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:03:04,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:04,631 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:03:04,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:03:04,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491749087] [2021-11-07 08:03:04,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491749087] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:03:04,633 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:03:04,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:03:04,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309056347] [2021-11-07 08:03:04,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:03:04,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:03:04,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:03:04,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:03:04,635 INFO L87 Difference]: Start difference. First operand 2304 states and 3206 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:03:04,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:03:04,859 INFO L93 Difference]: Finished difference Result 5086 states and 7025 transitions. [2021-11-07 08:03:04,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:03:04,860 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-07 08:03:04,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:03:04,879 INFO L225 Difference]: With dead ends: 5086 [2021-11-07 08:03:04,879 INFO L226 Difference]: Without dead ends: 2795 [2021-11-07 08:03:04,886 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:03:04,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2795 states. [2021-11-07 08:03:05,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2795 to 2790. [2021-11-07 08:03:05,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2790 states, 2721 states have (on average 1.3656743844174937) internal successors, (3716), 2729 states have internal predecessors, (3716), 44 states have call successors, (44), 24 states have call predecessors, (44), 24 states have return successors, (66), 40 states have call predecessors, (66), 44 states have call successors, (66) [2021-11-07 08:03:05,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2790 states to 2790 states and 3826 transitions. [2021-11-07 08:03:05,040 INFO L78 Accepts]: Start accepts. Automaton has 2790 states and 3826 transitions. Word has length 52 [2021-11-07 08:03:05,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:03:05,041 INFO L470 AbstractCegarLoop]: Abstraction has 2790 states and 3826 transitions. [2021-11-07 08:03:05,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:03:05,041 INFO L276 IsEmpty]: Start isEmpty. Operand 2790 states and 3826 transitions. [2021-11-07 08:03:05,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 08:03:05,045 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:03:05,045 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:03:05,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 08:03:05,046 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 08:03:05,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:03:05,046 INFO L85 PathProgramCache]: Analyzing trace with hash -587987276, now seen corresponding path program 1 times [2021-11-07 08:03:05,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:03:05,047 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894777011] [2021-11-07 08:03:05,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:03:05,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:03:05,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:05,173 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:03:05,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:03:05,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894777011] [2021-11-07 08:03:05,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894777011] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:03:05,174 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:03:05,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:03:05,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632050726] [2021-11-07 08:03:05,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:03:05,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:03:05,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:03:05,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:03:05,177 INFO L87 Difference]: Start difference. First operand 2790 states and 3826 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:03:07,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:03:07,425 INFO L93 Difference]: Finished difference Result 6106 states and 8353 transitions. [2021-11-07 08:03:07,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:03:07,426 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-07 08:03:07,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:03:07,450 INFO L225 Difference]: With dead ends: 6106 [2021-11-07 08:03:07,451 INFO L226 Difference]: Without dead ends: 3329 [2021-11-07 08:03:07,458 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:03:07,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3329 states. [2021-11-07 08:03:07,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3329 to 3324. [2021-11-07 08:03:07,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3324 states, 3255 states have (on average 1.3529953917050692) internal successors, (4404), 3263 states have internal predecessors, (4404), 44 states have call successors, (44), 24 states have call predecessors, (44), 24 states have return successors, (66), 40 states have call predecessors, (66), 44 states have call successors, (66) [2021-11-07 08:03:07,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3324 states to 3324 states and 4514 transitions. [2021-11-07 08:03:07,668 INFO L78 Accepts]: Start accepts. Automaton has 3324 states and 4514 transitions. Word has length 62 [2021-11-07 08:03:07,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:03:07,669 INFO L470 AbstractCegarLoop]: Abstraction has 3324 states and 4514 transitions. [2021-11-07 08:03:07,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:03:07,669 INFO L276 IsEmpty]: Start isEmpty. Operand 3324 states and 4514 transitions. [2021-11-07 08:03:07,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 08:03:07,672 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:03:07,673 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:03:07,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 08:03:07,673 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 08:03:07,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:03:07,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1736719260, now seen corresponding path program 1 times [2021-11-07 08:03:07,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:03:07,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304785564] [2021-11-07 08:03:07,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:03:07,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:03:07,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:07,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:03:07,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:03:07,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304785564] [2021-11-07 08:03:07,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304785564] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:03:07,777 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:03:07,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:03:07,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542150517] [2021-11-07 08:03:07,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:03:07,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:03:07,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:03:07,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:03:07,779 INFO L87 Difference]: Start difference. First operand 3324 states and 4514 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:03:08,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:03:08,043 INFO L93 Difference]: Finished difference Result 8661 states and 11909 transitions. [2021-11-07 08:03:08,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:03:08,044 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-07 08:03:08,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:03:08,081 INFO L225 Difference]: With dead ends: 8661 [2021-11-07 08:03:08,081 INFO L226 Difference]: Without dead ends: 5350 [2021-11-07 08:03:08,092 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:03:08,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5350 states. [2021-11-07 08:03:08,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5350 to 5334. [2021-11-07 08:03:08,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5334 states, 5197 states have (on average 1.3782951702905522) internal successors, (7163), 5213 states have internal predecessors, (7163), 88 states have call successors, (88), 48 states have call predecessors, (88), 48 states have return successors, (132), 80 states have call predecessors, (132), 88 states have call successors, (132) [2021-11-07 08:03:08,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5334 states to 5334 states and 7383 transitions. [2021-11-07 08:03:08,439 INFO L78 Accepts]: Start accepts. Automaton has 5334 states and 7383 transitions. Word has length 65 [2021-11-07 08:03:08,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:03:08,439 INFO L470 AbstractCegarLoop]: Abstraction has 5334 states and 7383 transitions. [2021-11-07 08:03:08,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:03:08,440 INFO L276 IsEmpty]: Start isEmpty. Operand 5334 states and 7383 transitions. [2021-11-07 08:03:08,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 08:03:08,445 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:03:08,445 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:03:08,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-07 08:03:08,446 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 08:03:08,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:03:08,446 INFO L85 PathProgramCache]: Analyzing trace with hash 477742688, now seen corresponding path program 1 times [2021-11-07 08:03:08,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:03:08,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916140511] [2021-11-07 08:03:08,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:03:08,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:03:08,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:08,564 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 08:03:08,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:03:08,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916140511] [2021-11-07 08:03:08,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916140511] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:03:08,565 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:03:08,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:03:08,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969350873] [2021-11-07 08:03:08,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:03:08,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:03:08,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:03:08,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:03:08,567 INFO L87 Difference]: Start difference. First operand 5334 states and 7383 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:03:10,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:03:10,940 INFO L93 Difference]: Finished difference Result 13036 states and 18190 transitions. [2021-11-07 08:03:10,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:03:10,941 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-07 08:03:10,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:03:11,018 INFO L225 Difference]: With dead ends: 13036 [2021-11-07 08:03:11,018 INFO L226 Difference]: Without dead ends: 7715 [2021-11-07 08:03:11,034 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:03:11,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7715 states. [2021-11-07 08:03:11,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7715 to 7710. [2021-11-07 08:03:11,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7710 states, 7461 states have (on average 1.3925747218871465) internal successors, (10390), 7493 states have internal predecessors, (10390), 152 states have call successors, (152), 96 states have call predecessors, (152), 96 states have return successors, (228), 136 states have call predecessors, (228), 152 states have call successors, (228) [2021-11-07 08:03:11,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7710 states to 7710 states and 10770 transitions. [2021-11-07 08:03:11,540 INFO L78 Accepts]: Start accepts. Automaton has 7710 states and 10770 transitions. Word has length 74 [2021-11-07 08:03:11,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:03:11,541 INFO L470 AbstractCegarLoop]: Abstraction has 7710 states and 10770 transitions. [2021-11-07 08:03:11,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:03:11,542 INFO L276 IsEmpty]: Start isEmpty. Operand 7710 states and 10770 transitions. [2021-11-07 08:03:11,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 08:03:11,547 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:03:11,547 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:03:11,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-07 08:03:11,548 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 08:03:11,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:03:11,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1414744033, now seen corresponding path program 1 times [2021-11-07 08:03:11,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:03:11,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131306798] [2021-11-07 08:03:11,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:03:11,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:03:11,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:11,677 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 08:03:11,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:03:11,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131306798] [2021-11-07 08:03:11,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131306798] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:03:11,678 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:03:11,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:03:11,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313671166] [2021-11-07 08:03:11,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:03:11,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:03:11,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:03:11,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:03:11,681 INFO L87 Difference]: Start difference. First operand 7710 states and 10770 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:03:12,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:03:12,057 INFO L93 Difference]: Finished difference Result 15439 states and 21573 transitions. [2021-11-07 08:03:12,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:03:12,058 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 08:03:12,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:03:12,091 INFO L225 Difference]: With dead ends: 15439 [2021-11-07 08:03:12,091 INFO L226 Difference]: Without dead ends: 7742 [2021-11-07 08:03:12,110 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:03:12,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7742 states. [2021-11-07 08:03:12,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7742 to 7726. [2021-11-07 08:03:12,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7726 states, 7477 states have (on average 1.3917346529356693) internal successors, (10406), 7509 states have internal predecessors, (10406), 152 states have call successors, (152), 96 states have call predecessors, (152), 96 states have return successors, (228), 136 states have call predecessors, (228), 152 states have call successors, (228) [2021-11-07 08:03:12,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7726 states to 7726 states and 10786 transitions. [2021-11-07 08:03:12,513 INFO L78 Accepts]: Start accepts. Automaton has 7726 states and 10786 transitions. Word has length 75 [2021-11-07 08:03:12,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:03:12,514 INFO L470 AbstractCegarLoop]: Abstraction has 7726 states and 10786 transitions. [2021-11-07 08:03:12,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:03:12,579 INFO L276 IsEmpty]: Start isEmpty. Operand 7726 states and 10786 transitions. [2021-11-07 08:03:12,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 08:03:12,584 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:03:12,584 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:03:12,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-07 08:03:12,585 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 08:03:12,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:03:12,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1473234019, now seen corresponding path program 1 times [2021-11-07 08:03:12,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:03:12,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258377901] [2021-11-07 08:03:12,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:03:12,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:03:12,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:12,755 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 08:03:12,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:03:12,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258377901] [2021-11-07 08:03:12,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258377901] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:12,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815114434] [2021-11-07 08:03:12,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:03:12,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:03:12,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:03:12,762 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:03:12,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 08:03:13,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:13,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 1413 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 08:03:13,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:03:13,797 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 08:03:13,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815114434] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:13,798 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:03:13,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-11-07 08:03:13,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856796856] [2021-11-07 08:03:13,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:03:13,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:03:13,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:03:13,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:03:13,799 INFO L87 Difference]: Start difference. First operand 7726 states and 10786 transitions. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:03:14,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:03:14,191 INFO L93 Difference]: Finished difference Result 15487 states and 21621 transitions. [2021-11-07 08:03:14,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:03:14,192 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-07 08:03:14,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:03:14,224 INFO L225 Difference]: With dead ends: 15487 [2021-11-07 08:03:14,224 INFO L226 Difference]: Without dead ends: 7774 [2021-11-07 08:03:14,245 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:03:14,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7774 states. [2021-11-07 08:03:14,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7774 to 7758. [2021-11-07 08:03:14,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7758 states, 7509 states have (on average 1.3900652550273005) internal successors, (10438), 7541 states have internal predecessors, (10438), 152 states have call successors, (152), 96 states have call predecessors, (152), 96 states have return successors, (228), 136 states have call predecessors, (228), 152 states have call successors, (228) [2021-11-07 08:03:14,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7758 states to 7758 states and 10818 transitions. [2021-11-07 08:03:14,818 INFO L78 Accepts]: Start accepts. Automaton has 7758 states and 10818 transitions. Word has length 77 [2021-11-07 08:03:14,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:03:14,818 INFO L470 AbstractCegarLoop]: Abstraction has 7758 states and 10818 transitions. [2021-11-07 08:03:14,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:03:14,821 INFO L276 IsEmpty]: Start isEmpty. Operand 7758 states and 10818 transitions. [2021-11-07 08:03:14,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 08:03:14,832 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:03:14,832 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:03:14,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 08:03:15,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:03:15,046 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 08:03:15,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:03:15,047 INFO L85 PathProgramCache]: Analyzing trace with hash 2023698521, now seen corresponding path program 2 times [2021-11-07 08:03:15,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:03:15,047 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043634202] [2021-11-07 08:03:15,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:03:15,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:03:15,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:15,271 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 08:03:15,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:03:15,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043634202] [2021-11-07 08:03:15,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043634202] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:15,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727181235] [2021-11-07 08:03:15,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:03:15,273 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:03:15,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:03:15,274 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:03:15,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 08:03:17,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:03:17,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:03:17,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 1419 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 08:03:17,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:03:17,798 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 08:03:17,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727181235] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:17,798 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:03:17,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-11-07 08:03:17,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95933856] [2021-11-07 08:03:17,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 08:03:17,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:03:17,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 08:03:17,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:03:17,801 INFO L87 Difference]: Start difference. First operand 7758 states and 10818 transitions. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:03:20,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:03:20,539 INFO L93 Difference]: Finished difference Result 24331 states and 33831 transitions. [2021-11-07 08:03:20,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 08:03:20,541 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-07 08:03:20,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:03:20,612 INFO L225 Difference]: With dead ends: 24331 [2021-11-07 08:03:20,613 INFO L226 Difference]: Without dead ends: 16586 [2021-11-07 08:03:20,640 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-11-07 08:03:20,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16586 states. [2021-11-07 08:03:21,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16586 to 16174. [2021-11-07 08:03:21,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16174 states, 15677 states have (on average 1.387829304076035) internal successors, (21757), 15741 states have internal predecessors, (21757), 304 states have call successors, (304), 192 states have call predecessors, (304), 192 states have return successors, (456), 272 states have call predecessors, (456), 304 states have call successors, (456) [2021-11-07 08:03:21,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16174 states to 16174 states and 22517 transitions. [2021-11-07 08:03:21,579 INFO L78 Accepts]: Start accepts. Automaton has 16174 states and 22517 transitions. Word has length 79 [2021-11-07 08:03:21,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:03:21,579 INFO L470 AbstractCegarLoop]: Abstraction has 16174 states and 22517 transitions. [2021-11-07 08:03:21,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:03:21,580 INFO L276 IsEmpty]: Start isEmpty. Operand 16174 states and 22517 transitions. [2021-11-07 08:03:21,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-07 08:03:21,592 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:03:21,592 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:03:21,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 08:03:21,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-07 08:03:21,818 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 08:03:21,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:03:21,819 INFO L85 PathProgramCache]: Analyzing trace with hash 317541271, now seen corresponding path program 1 times [2021-11-07 08:03:21,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:03:21,819 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587675907] [2021-11-07 08:03:21,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:03:21,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:03:21,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:22,060 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 08:03:22,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:03:22,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587675907] [2021-11-07 08:03:22,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587675907] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:22,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791685241] [2021-11-07 08:03:22,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:03:22,062 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:03:22,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:03:22,063 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:03:22,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 08:03:22,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:22,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 1420 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 08:03:22,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:03:23,018 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 08:03:23,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791685241] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:23,018 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:03:23,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-11-07 08:03:23,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065112570] [2021-11-07 08:03:23,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 08:03:23,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:03:23,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 08:03:23,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:03:23,020 INFO L87 Difference]: Start difference. First operand 16174 states and 22517 transitions. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:03:24,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:03:24,188 INFO L93 Difference]: Finished difference Result 32449 states and 45171 transitions. [2021-11-07 08:03:24,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:03:24,189 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-07 08:03:24,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:03:24,271 INFO L225 Difference]: With dead ends: 32449 [2021-11-07 08:03:24,272 INFO L226 Difference]: Without dead ends: 16288 [2021-11-07 08:03:24,325 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:03:24,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16288 states. [2021-11-07 08:03:25,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16288 to 16250. [2021-11-07 08:03:25,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16250 states, 15753 states have (on average 1.3859582301783788) internal successors, (21833), 15817 states have internal predecessors, (21833), 304 states have call successors, (304), 192 states have call predecessors, (304), 192 states have return successors, (456), 272 states have call predecessors, (456), 304 states have call successors, (456) [2021-11-07 08:03:25,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16250 states to 16250 states and 22593 transitions. [2021-11-07 08:03:25,198 INFO L78 Accepts]: Start accepts. Automaton has 16250 states and 22593 transitions. Word has length 81 [2021-11-07 08:03:25,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:03:25,199 INFO L470 AbstractCegarLoop]: Abstraction has 16250 states and 22593 transitions. [2021-11-07 08:03:25,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:03:25,199 INFO L276 IsEmpty]: Start isEmpty. Operand 16250 states and 22593 transitions. [2021-11-07 08:03:25,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-07 08:03:25,210 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:03:25,210 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:03:25,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-07 08:03:25,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-07 08:03:25,426 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 08:03:25,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:03:25,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1964737107, now seen corresponding path program 2 times [2021-11-07 08:03:25,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:03:25,427 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109736412] [2021-11-07 08:03:25,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:03:25,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:03:25,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:25,620 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 08:03:25,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:03:25,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109736412] [2021-11-07 08:03:25,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109736412] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:25,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199426534] [2021-11-07 08:03:25,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:03:25,622 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:03:25,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:03:25,623 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:03:25,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 08:03:28,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:03:28,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:03:28,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 1426 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 08:03:28,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:03:28,702 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 08:03:28,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199426534] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:28,702 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:03:28,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-11-07 08:03:28,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668311936] [2021-11-07 08:03:28,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 08:03:28,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:03:28,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 08:03:28,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:03:28,705 INFO L87 Difference]: Start difference. First operand 16250 states and 22593 transitions. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:03:29,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:03:29,439 INFO L93 Difference]: Finished difference Result 32601 states and 45323 transitions. [2021-11-07 08:03:29,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 08:03:29,440 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-07 08:03:29,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:03:29,526 INFO L225 Difference]: With dead ends: 32601 [2021-11-07 08:03:29,527 INFO L226 Difference]: Without dead ends: 16364 [2021-11-07 08:03:29,557 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:03:29,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16364 states. [2021-11-07 08:03:30,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16364 to 16326. [2021-11-07 08:03:30,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16326 states, 15829 states have (on average 1.3841051235074862) internal successors, (21909), 15893 states have internal predecessors, (21909), 304 states have call successors, (304), 192 states have call predecessors, (304), 192 states have return successors, (456), 272 states have call predecessors, (456), 304 states have call successors, (456) [2021-11-07 08:03:30,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16326 states to 16326 states and 22669 transitions. [2021-11-07 08:03:30,379 INFO L78 Accepts]: Start accepts. Automaton has 16326 states and 22669 transitions. Word has length 83 [2021-11-07 08:03:30,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:03:30,380 INFO L470 AbstractCegarLoop]: Abstraction has 16326 states and 22669 transitions. [2021-11-07 08:03:30,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:03:30,380 INFO L276 IsEmpty]: Start isEmpty. Operand 16326 states and 22669 transitions. [2021-11-07 08:03:30,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-07 08:03:30,392 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:03:30,392 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:03:30,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-07 08:03:30,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-07 08:03:30,618 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 08:03:30,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:03:30,619 INFO L85 PathProgramCache]: Analyzing trace with hash 77003279, now seen corresponding path program 3 times [2021-11-07 08:03:30,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:03:30,619 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450700991] [2021-11-07 08:03:30,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:03:30,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:03:30,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:30,815 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 08:03:30,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:03:30,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450700991] [2021-11-07 08:03:30,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450700991] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:30,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679064748] [2021-11-07 08:03:30,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:03:30,816 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:03:30,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:03:30,818 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:03:30,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 08:03:34,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 08:03:34,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:03:34,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 1265 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 08:03:34,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:03:34,487 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-07 08:03:34,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679064748] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:03:34,488 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:03:34,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2021-11-07 08:03:34,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970853246] [2021-11-07 08:03:34,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:03:34,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:03:34,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:03:34,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-07 08:03:34,490 INFO L87 Difference]: Start difference. First operand 16326 states and 22669 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:03:43,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:03:43,492 INFO L93 Difference]: Finished difference Result 52762 states and 72878 transitions. [2021-11-07 08:03:43,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:03:43,492 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-07 08:03:43,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:03:43,628 INFO L225 Difference]: With dead ends: 52762 [2021-11-07 08:03:43,628 INFO L226 Difference]: Without dead ends: 36449 [2021-11-07 08:03:43,657 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-11-07 08:03:43,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36449 states. [2021-11-07 08:03:45,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36449 to 16440. [2021-11-07 08:03:45,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16440 states, 15943 states have (on average 1.3813585899767924) internal successors, (22023), 16007 states have internal predecessors, (22023), 304 states have call successors, (304), 192 states have call predecessors, (304), 192 states have return successors, (456), 272 states have call predecessors, (456), 304 states have call successors, (456) [2021-11-07 08:03:45,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16440 states to 16440 states and 22783 transitions. [2021-11-07 08:03:45,114 INFO L78 Accepts]: Start accepts. Automaton has 16440 states and 22783 transitions. Word has length 85 [2021-11-07 08:03:45,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:03:45,114 INFO L470 AbstractCegarLoop]: Abstraction has 16440 states and 22783 transitions. [2021-11-07 08:03:45,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:03:45,115 INFO L276 IsEmpty]: Start isEmpty. Operand 16440 states and 22783 transitions. [2021-11-07 08:03:45,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-07 08:03:45,137 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:03:45,138 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:03:45,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-07 08:03:45,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-07 08:03:45,354 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 08:03:45,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:03:45,355 INFO L85 PathProgramCache]: Analyzing trace with hash 129601707, now seen corresponding path program 1 times [2021-11-07 08:03:45,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:03:45,355 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42420150] [2021-11-07 08:03:45,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:03:45,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:03:45,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:45,606 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 08:03:45,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:03:45,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42420150] [2021-11-07 08:03:45,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42420150] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:45,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682730756] [2021-11-07 08:03:45,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:03:45,608 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:03:45,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:03:45,609 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:03:45,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-07 08:03:46,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:46,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 1450 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 08:03:46,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:03:46,547 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 08:03:46,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682730756] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:46,547 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:03:46,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-11-07 08:03:46,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797746190] [2021-11-07 08:03:46,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 08:03:46,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:03:46,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 08:03:46,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-07 08:03:46,550 INFO L87 Difference]: Start difference. First operand 16440 states and 22783 transitions. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:03:47,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:03:47,418 INFO L93 Difference]: Finished difference Result 32981 states and 45703 transitions. [2021-11-07 08:03:47,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 08:03:47,419 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-11-07 08:03:47,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:03:47,473 INFO L225 Difference]: With dead ends: 32981 [2021-11-07 08:03:47,473 INFO L226 Difference]: Without dead ends: 16554 [2021-11-07 08:03:47,507 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-07 08:03:47,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16554 states. [2021-11-07 08:03:48,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16554 to 16516. [2021-11-07 08:03:48,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16516 states, 16019 states have (on average 1.3795492852237967) internal successors, (22099), 16083 states have internal predecessors, (22099), 304 states have call successors, (304), 192 states have call predecessors, (304), 192 states have return successors, (456), 272 states have call predecessors, (456), 304 states have call successors, (456) [2021-11-07 08:03:48,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16516 states to 16516 states and 22859 transitions. [2021-11-07 08:03:48,634 INFO L78 Accepts]: Start accepts. Automaton has 16516 states and 22859 transitions. Word has length 87 [2021-11-07 08:03:48,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:03:48,635 INFO L470 AbstractCegarLoop]: Abstraction has 16516 states and 22859 transitions. [2021-11-07 08:03:48,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:03:48,635 INFO L276 IsEmpty]: Start isEmpty. Operand 16516 states and 22859 transitions. [2021-11-07 08:03:48,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-07 08:03:48,650 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:03:48,650 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:03:48,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-07 08:03:48,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-07 08:03:48,874 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 08:03:48,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:03:48,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1743442535, now seen corresponding path program 2 times [2021-11-07 08:03:48,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:03:48,875 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015542220] [2021-11-07 08:03:48,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:03:48,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:03:48,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:49,078 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 7 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 08:03:49,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:03:49,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015542220] [2021-11-07 08:03:49,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015542220] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:49,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162009692] [2021-11-07 08:03:49,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:03:49,080 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:03:49,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:03:49,082 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:03:49,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-07 08:03:51,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:03:51,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:03:51,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 1456 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 08:03:51,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:03:52,232 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 7 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 08:03:52,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162009692] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:52,233 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:03:52,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-11-07 08:03:52,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135755598] [2021-11-07 08:03:52,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 08:03:52,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:03:52,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 08:03:52,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-11-07 08:03:52,235 INFO L87 Difference]: Start difference. First operand 16516 states and 22859 transitions. Second operand has 10 states, 10 states have (on average 9.1) internal successors, (91), 10 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:03:53,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:03:53,074 INFO L93 Difference]: Finished difference Result 33133 states and 45855 transitions. [2021-11-07 08:03:53,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 08:03:53,075 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 9.1) internal successors, (91), 10 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-11-07 08:03:53,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:03:53,126 INFO L225 Difference]: With dead ends: 33133 [2021-11-07 08:03:53,127 INFO L226 Difference]: Without dead ends: 16630 [2021-11-07 08:03:53,153 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-11-07 08:03:53,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16630 states. [2021-11-07 08:03:54,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16630 to 16592. [2021-11-07 08:03:54,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16592 states, 16095 states have (on average 1.37775706741224) internal successors, (22175), 16159 states have internal predecessors, (22175), 304 states have call successors, (304), 192 states have call predecessors, (304), 192 states have return successors, (456), 272 states have call predecessors, (456), 304 states have call successors, (456) [2021-11-07 08:03:54,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16592 states to 16592 states and 22935 transitions. [2021-11-07 08:03:54,253 INFO L78 Accepts]: Start accepts. Automaton has 16592 states and 22935 transitions. Word has length 89 [2021-11-07 08:03:54,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:03:54,253 INFO L470 AbstractCegarLoop]: Abstraction has 16592 states and 22935 transitions. [2021-11-07 08:03:54,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.1) internal successors, (91), 10 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:03:54,254 INFO L276 IsEmpty]: Start isEmpty. Operand 16592 states and 22935 transitions. [2021-11-07 08:03:54,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-07 08:03:54,266 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:03:54,266 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:03:54,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-07 08:03:54,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-07 08:03:54,482 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 08:03:54,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:03:54,482 INFO L85 PathProgramCache]: Analyzing trace with hash -2133682909, now seen corresponding path program 3 times [2021-11-07 08:03:54,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:03:54,483 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667989055] [2021-11-07 08:03:54,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:03:54,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:03:54,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:54,687 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 08:03:54,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:03:54,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667989055] [2021-11-07 08:03:54,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667989055] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:54,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990211955] [2021-11-07 08:03:54,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:03:54,688 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:03:54,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:03:54,689 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:03:54,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-07 08:03:57,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 08:03:57,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:03:57,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 1283 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 08:03:57,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:03:58,321 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-07 08:03:58,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990211955] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:03:58,321 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:03:58,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2021-11-07 08:03:58,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425720489] [2021-11-07 08:03:58,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:03:58,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:03:58,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:03:58,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-11-07 08:03:58,323 INFO L87 Difference]: Start difference. First operand 16592 states and 22935 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:04:00,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:04:00,937 INFO L93 Difference]: Finished difference Result 58690 states and 79579 transitions. [2021-11-07 08:04:00,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 08:04:00,938 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-11-07 08:04:00,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:04:01,045 INFO L225 Difference]: With dead ends: 58690 [2021-11-07 08:04:01,045 INFO L226 Difference]: Without dead ends: 42111 [2021-11-07 08:04:01,082 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-11-07 08:04:01,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42111 states. [2021-11-07 08:04:02,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42111 to 16872. [2021-11-07 08:04:02,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16872 states, 16375 states have (on average 1.3755725190839694) internal successors, (22525), 16439 states have internal predecessors, (22525), 304 states have call successors, (304), 192 states have call predecessors, (304), 192 states have return successors, (456), 272 states have call predecessors, (456), 304 states have call successors, (456) [2021-11-07 08:04:02,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16872 states to 16872 states and 23285 transitions. [2021-11-07 08:04:02,397 INFO L78 Accepts]: Start accepts. Automaton has 16872 states and 23285 transitions. Word has length 91 [2021-11-07 08:04:02,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:04:02,397 INFO L470 AbstractCegarLoop]: Abstraction has 16872 states and 23285 transitions. [2021-11-07 08:04:02,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:04:02,397 INFO L276 IsEmpty]: Start isEmpty. Operand 16872 states and 23285 transitions. [2021-11-07 08:04:02,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-07 08:04:02,408 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:04:02,409 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:04:02,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-07 08:04:02,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:04:02,614 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 08:04:02,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:04:02,615 INFO L85 PathProgramCache]: Analyzing trace with hash 610829863, now seen corresponding path program 1 times [2021-11-07 08:04:02,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:04:02,615 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278420879] [2021-11-07 08:04:02,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:04:02,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:04:02,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:02,833 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 08:04:02,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:04:02,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278420879] [2021-11-07 08:04:02,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278420879] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:04:02,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765909285] [2021-11-07 08:04:02,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:04:02,834 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:04:02,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:04:02,835 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:04:02,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-07 08:04:03,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:03,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 1480 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 08:04:03,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:04:03,814 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 08:04:03,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765909285] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:04:03,814 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:04:03,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-11-07 08:04:03,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067942903] [2021-11-07 08:04:03,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 08:04:03,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:04:03,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 08:04:03,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-11-07 08:04:03,816 INFO L87 Difference]: Start difference. First operand 16872 states and 23285 transitions. Second operand has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:04:04,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:04:04,739 INFO L93 Difference]: Finished difference Result 33845 states and 46707 transitions. [2021-11-07 08:04:04,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 08:04:04,740 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-11-07 08:04:04,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:04:04,793 INFO L225 Difference]: With dead ends: 33845 [2021-11-07 08:04:04,793 INFO L226 Difference]: Without dead ends: 16986 [2021-11-07 08:04:04,825 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-11-07 08:04:04,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16986 states. [2021-11-07 08:04:05,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16986 to 16948. [2021-11-07 08:04:05,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16948 states, 16451 states have (on average 1.373837456689563) internal successors, (22601), 16515 states have internal predecessors, (22601), 304 states have call successors, (304), 192 states have call predecessors, (304), 192 states have return successors, (456), 272 states have call predecessors, (456), 304 states have call successors, (456) [2021-11-07 08:04:05,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16948 states to 16948 states and 23361 transitions. [2021-11-07 08:04:05,834 INFO L78 Accepts]: Start accepts. Automaton has 16948 states and 23361 transitions. Word has length 93 [2021-11-07 08:04:05,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:04:05,834 INFO L470 AbstractCegarLoop]: Abstraction has 16948 states and 23361 transitions. [2021-11-07 08:04:05,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:04:05,835 INFO L276 IsEmpty]: Start isEmpty. Operand 16948 states and 23361 transitions. [2021-11-07 08:04:05,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-07 08:04:05,844 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:04:05,845 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:04:05,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-07 08:04:06,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:04:06,058 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 08:04:06,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:04:06,059 INFO L85 PathProgramCache]: Analyzing trace with hash -531555131, now seen corresponding path program 1 times [2021-11-07 08:04:06,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:04:06,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288909808] [2021-11-07 08:04:06,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:04:06,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:04:06,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:06,239 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 08:04:06,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:04:06,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288909808] [2021-11-07 08:04:06,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288909808] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:04:06,240 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:04:06,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:04:06,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77341784] [2021-11-07 08:04:06,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:04:06,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:04:06,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:04:06,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:04:06,242 INFO L87 Difference]: Start difference. First operand 16948 states and 23361 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:04:08,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:04:08,633 INFO L93 Difference]: Finished difference Result 25819 states and 35576 transitions. [2021-11-07 08:04:08,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:04:08,634 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-11-07 08:04:08,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:04:08,655 INFO L225 Difference]: With dead ends: 25819 [2021-11-07 08:04:08,655 INFO L226 Difference]: Without dead ends: 9133 [2021-11-07 08:04:08,679 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:04:08,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9133 states. [2021-11-07 08:04:09,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9133 to 9104. [2021-11-07 08:04:09,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9104 states, 8855 states have (on average 1.359683794466403) internal successors, (12040), 8887 states have internal predecessors, (12040), 152 states have call successors, (152), 96 states have call predecessors, (152), 96 states have return successors, (228), 136 states have call predecessors, (228), 152 states have call successors, (228) [2021-11-07 08:04:09,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9104 states to 9104 states and 12420 transitions. [2021-11-07 08:04:09,282 INFO L78 Accepts]: Start accepts. Automaton has 9104 states and 12420 transitions. Word has length 94 [2021-11-07 08:04:09,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:04:09,283 INFO L470 AbstractCegarLoop]: Abstraction has 9104 states and 12420 transitions. [2021-11-07 08:04:09,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:04:09,283 INFO L276 IsEmpty]: Start isEmpty. Operand 9104 states and 12420 transitions. [2021-11-07 08:04:09,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-07 08:04:09,295 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:04:09,295 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:04:09,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-07 08:04:09,296 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 08:04:09,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:04:09,297 INFO L85 PathProgramCache]: Analyzing trace with hash 704154339, now seen corresponding path program 2 times [2021-11-07 08:04:09,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:04:09,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253380119] [2021-11-07 08:04:09,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:04:09,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:04:09,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:09,564 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 7 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 08:04:09,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:04:09,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253380119] [2021-11-07 08:04:09,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253380119] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:04:09,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737774797] [2021-11-07 08:04:09,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:04:09,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:04:09,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:04:09,566 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:04:09,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-07 08:04:12,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:04:12,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:04:12,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 1486 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 08:04:12,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:04:12,600 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 7 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 08:04:12,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737774797] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:04:12,601 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:04:12,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-11-07 08:04:12,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556746606] [2021-11-07 08:04:12,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 08:04:12,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:04:12,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 08:04:12,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-07 08:04:12,604 INFO L87 Difference]: Start difference. First operand 9104 states and 12420 transitions. Second operand has 12 states, 12 states have (on average 8.083333333333334) internal successors, (97), 12 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:04:13,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:04:13,239 INFO L93 Difference]: Finished difference Result 18267 states and 24921 transitions. [2021-11-07 08:04:13,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 08:04:13,240 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.083333333333334) internal successors, (97), 12 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-11-07 08:04:13,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:04:13,263 INFO L225 Difference]: With dead ends: 18267 [2021-11-07 08:04:13,263 INFO L226 Difference]: Without dead ends: 9176 [2021-11-07 08:04:13,282 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-07 08:04:13,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9176 states. [2021-11-07 08:04:13,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9176 to 9152. [2021-11-07 08:04:13,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9152 states, 8903 states have (on average 1.3577445804784904) internal successors, (12088), 8935 states have internal predecessors, (12088), 152 states have call successors, (152), 96 states have call predecessors, (152), 96 states have return successors, (228), 136 states have call predecessors, (228), 152 states have call successors, (228) [2021-11-07 08:04:13,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9152 states to 9152 states and 12468 transitions. [2021-11-07 08:04:13,881 INFO L78 Accepts]: Start accepts. Automaton has 9152 states and 12468 transitions. Word has length 95 [2021-11-07 08:04:13,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:04:13,881 INFO L470 AbstractCegarLoop]: Abstraction has 9152 states and 12468 transitions. [2021-11-07 08:04:13,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.083333333333334) internal successors, (97), 12 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:04:13,882 INFO L276 IsEmpty]: Start isEmpty. Operand 9152 states and 12468 transitions. [2021-11-07 08:04:13,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-07 08:04:13,891 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:04:13,891 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:04:13,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-07 08:04:14,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-07 08:04:14,106 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 08:04:14,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:04:14,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1459921486, now seen corresponding path program 1 times [2021-11-07 08:04:14,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:04:14,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929093201] [2021-11-07 08:04:14,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:04:14,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:04:14,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:14,274 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 08:04:14,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:04:14,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929093201] [2021-11-07 08:04:14,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929093201] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:04:14,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363754796] [2021-11-07 08:04:14,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:04:14,276 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:04:14,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:04:14,277 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:04:14,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-07 08:04:15,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:15,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 1521 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 08:04:15,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:04:15,372 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 08:04:15,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363754796] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:04:15,372 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:04:15,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-07 08:04:15,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504809085] [2021-11-07 08:04:15,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:04:15,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:04:15,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:04:15,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:04:15,374 INFO L87 Difference]: Start difference. First operand 9152 states and 12468 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:04:15,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:04:15,909 INFO L93 Difference]: Finished difference Result 16713 states and 23044 transitions. [2021-11-07 08:04:15,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:04:15,910 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-11-07 08:04:15,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:04:15,936 INFO L225 Difference]: With dead ends: 16713 [2021-11-07 08:04:15,936 INFO L226 Difference]: Without dead ends: 12357 [2021-11-07 08:04:15,946 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:04:15,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12357 states. [2021-11-07 08:04:16,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12357 to 12348. [2021-11-07 08:04:16,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12348 states, 11975 states have (on average 1.3769519832985386) internal successors, (16489), 12023 states have internal predecessors, (16489), 228 states have call successors, (228), 144 states have call predecessors, (228), 144 states have return successors, (342), 204 states have call predecessors, (342), 228 states have call successors, (342) [2021-11-07 08:04:16,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12348 states to 12348 states and 17059 transitions. [2021-11-07 08:04:16,555 INFO L78 Accepts]: Start accepts. Automaton has 12348 states and 17059 transitions. Word has length 97 [2021-11-07 08:04:16,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:04:16,555 INFO L470 AbstractCegarLoop]: Abstraction has 12348 states and 17059 transitions. [2021-11-07 08:04:16,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:04:16,556 INFO L276 IsEmpty]: Start isEmpty. Operand 12348 states and 17059 transitions. [2021-11-07 08:04:16,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-07 08:04:16,563 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:04:16,563 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:04:16,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-07 08:04:16,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-07 08:04:16,764 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 08:04:16,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:04:16,764 INFO L85 PathProgramCache]: Analyzing trace with hash 194662559, now seen corresponding path program 3 times [2021-11-07 08:04:16,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:04:16,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210680548] [2021-11-07 08:04:16,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:04:16,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:04:16,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:16,992 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 7 proven. 81 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 08:04:16,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:04:16,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210680548] [2021-11-07 08:04:16,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210680548] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:04:16,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762319874] [2021-11-07 08:04:16,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:04:16,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:04:16,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:04:16,995 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:04:17,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-07 08:04:20,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 08:04:20,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:04:20,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 1301 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-07 08:04:20,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:04:20,886 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-07 08:04:20,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762319874] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:04:20,886 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:04:20,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 19 [2021-11-07 08:04:20,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060386039] [2021-11-07 08:04:20,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 08:04:20,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:04:20,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 08:04:20,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-11-07 08:04:20,889 INFO L87 Difference]: Start difference. First operand 12348 states and 17059 transitions. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:04:28,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:04:28,293 INFO L93 Difference]: Finished difference Result 54307 states and 73492 transitions. [2021-11-07 08:04:28,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-07 08:04:28,293 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-11-07 08:04:28,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:04:28,370 INFO L225 Difference]: With dead ends: 54307 [2021-11-07 08:04:28,370 INFO L226 Difference]: Without dead ends: 41972 [2021-11-07 08:04:28,390 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 796 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=581, Invalid=2841, Unknown=0, NotChecked=0, Total=3422 [2021-11-07 08:04:28,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41972 states. [2021-11-07 08:04:29,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41972 to 12348. [2021-11-07 08:04:29,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12348 states, 11975 states have (on average 1.3759498956158664) internal successors, (16477), 12023 states have internal predecessors, (16477), 228 states have call successors, (228), 144 states have call predecessors, (228), 144 states have return successors, (342), 204 states have call predecessors, (342), 228 states have call successors, (342) [2021-11-07 08:04:29,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12348 states to 12348 states and 17047 transitions. [2021-11-07 08:04:29,562 INFO L78 Accepts]: Start accepts. Automaton has 12348 states and 17047 transitions. Word has length 97 [2021-11-07 08:04:29,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:04:29,563 INFO L470 AbstractCegarLoop]: Abstraction has 12348 states and 17047 transitions. [2021-11-07 08:04:29,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:04:29,564 INFO L276 IsEmpty]: Start isEmpty. Operand 12348 states and 17047 transitions. [2021-11-07 08:04:29,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-07 08:04:29,574 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:04:29,575 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:04:29,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-07 08:04:29,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:04:29,790 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 08:04:29,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:04:29,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1319547252, now seen corresponding path program 1 times [2021-11-07 08:04:29,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:04:29,791 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496735016] [2021-11-07 08:04:29,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:04:29,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:04:29,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:29,925 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 08:04:29,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:04:29,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496735016] [2021-11-07 08:04:29,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496735016] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:04:29,926 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:04:29,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:04:29,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021337521] [2021-11-07 08:04:29,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:04:29,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:04:29,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:04:29,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:04:29,928 INFO L87 Difference]: Start difference. First operand 12348 states and 17047 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:04:32,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:04:32,702 INFO L93 Difference]: Finished difference Result 22714 states and 31602 transitions. [2021-11-07 08:04:32,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:04:32,702 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-11-07 08:04:32,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:04:32,728 INFO L225 Difference]: With dead ends: 22714 [2021-11-07 08:04:32,728 INFO L226 Difference]: Without dead ends: 11726 [2021-11-07 08:04:32,744 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:04:32,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11726 states. [2021-11-07 08:04:33,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11726 to 11721. [2021-11-07 08:04:33,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11721 states, 11348 states have (on average 1.3766302432146633) internal successors, (15622), 11396 states have internal predecessors, (15622), 228 states have call successors, (228), 144 states have call predecessors, (228), 144 states have return successors, (342), 204 states have call predecessors, (342), 228 states have call successors, (342) [2021-11-07 08:04:33,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11721 states to 11721 states and 16192 transitions. [2021-11-07 08:04:33,697 INFO L78 Accepts]: Start accepts. Automaton has 11721 states and 16192 transitions. Word has length 99 [2021-11-07 08:04:33,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:04:33,697 INFO L470 AbstractCegarLoop]: Abstraction has 11721 states and 16192 transitions. [2021-11-07 08:04:33,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:04:33,697 INFO L276 IsEmpty]: Start isEmpty. Operand 11721 states and 16192 transitions. [2021-11-07 08:04:33,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-07 08:04:33,703 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:04:33,704 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:04:33,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-07 08:04:33,704 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 08:04:33,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:04:33,705 INFO L85 PathProgramCache]: Analyzing trace with hash -485891082, now seen corresponding path program 1 times [2021-11-07 08:04:33,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:04:33,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488149057] [2021-11-07 08:04:33,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:04:33,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:04:33,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:33,849 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-07 08:04:33,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:04:33,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488149057] [2021-11-07 08:04:33,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488149057] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:04:33,850 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:04:33,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:04:33,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620146262] [2021-11-07 08:04:33,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:04:33,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:04:33,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:04:33,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:04:33,852 INFO L87 Difference]: Start difference. First operand 11721 states and 16192 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:04:35,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:04:35,615 INFO L93 Difference]: Finished difference Result 30312 states and 41932 transitions. [2021-11-07 08:04:35,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 08:04:35,616 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-11-07 08:04:35,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:04:35,656 INFO L225 Difference]: With dead ends: 30312 [2021-11-07 08:04:35,656 INFO L226 Difference]: Without dead ends: 20355 [2021-11-07 08:04:35,672 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:04:35,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20355 states. [2021-11-07 08:04:36,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20355 to 11745. [2021-11-07 08:04:36,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11745 states, 11372 states have (on average 1.3758353851565248) internal successors, (15646), 11420 states have internal predecessors, (15646), 228 states have call successors, (228), 144 states have call predecessors, (228), 144 states have return successors, (342), 204 states have call predecessors, (342), 228 states have call successors, (342) [2021-11-07 08:04:36,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11745 states to 11745 states and 16216 transitions. [2021-11-07 08:04:36,508 INFO L78 Accepts]: Start accepts. Automaton has 11745 states and 16216 transitions. Word has length 99 [2021-11-07 08:04:36,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:04:36,508 INFO L470 AbstractCegarLoop]: Abstraction has 11745 states and 16216 transitions. [2021-11-07 08:04:36,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:04:36,508 INFO L276 IsEmpty]: Start isEmpty. Operand 11745 states and 16216 transitions. [2021-11-07 08:04:36,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-07 08:04:36,514 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:04:36,514 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:04:36,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-07 08:04:36,514 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 08:04:36,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:04:36,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1141828049, now seen corresponding path program 1 times [2021-11-07 08:04:36,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:04:36,515 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72764919] [2021-11-07 08:04:36,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:04:36,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:04:36,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:36,687 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-07 08:04:36,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:04:36,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72764919] [2021-11-07 08:04:36,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72764919] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:04:36,688 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:04:36,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:04:36,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182663521] [2021-11-07 08:04:36,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:04:36,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:04:36,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:04:36,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:04:36,690 INFO L87 Difference]: Start difference. First operand 11745 states and 16216 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:04:37,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:04:37,874 INFO L93 Difference]: Finished difference Result 23569 states and 32601 transitions. [2021-11-07 08:04:37,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:04:37,875 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-11-07 08:04:37,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:04:37,899 INFO L225 Difference]: With dead ends: 23569 [2021-11-07 08:04:37,900 INFO L226 Difference]: Without dead ends: 11837 [2021-11-07 08:04:37,917 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:04:37,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11837 states. [2021-11-07 08:04:38,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11837 to 11837. [2021-11-07 08:04:38,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11837 states, 11464 states have (on average 1.3728192602930913) internal successors, (15738), 11512 states have internal predecessors, (15738), 228 states have call successors, (228), 144 states have call predecessors, (228), 144 states have return successors, (342), 204 states have call predecessors, (342), 228 states have call successors, (342) [2021-11-07 08:04:38,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11837 states to 11837 states and 16308 transitions. [2021-11-07 08:04:38,702 INFO L78 Accepts]: Start accepts. Automaton has 11837 states and 16308 transitions. Word has length 100 [2021-11-07 08:04:38,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:04:38,703 INFO L470 AbstractCegarLoop]: Abstraction has 11837 states and 16308 transitions. [2021-11-07 08:04:38,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:04:38,703 INFO L276 IsEmpty]: Start isEmpty. Operand 11837 states and 16308 transitions. [2021-11-07 08:04:38,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-07 08:04:38,708 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:04:38,708 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:04:38,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-07 08:04:38,709 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 08:04:38,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:04:38,709 INFO L85 PathProgramCache]: Analyzing trace with hash 818254937, now seen corresponding path program 1 times [2021-11-07 08:04:38,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:04:38,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296053309] [2021-11-07 08:04:38,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:04:38,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:04:38,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:38,981 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-07 08:04:38,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:04:38,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296053309] [2021-11-07 08:04:38,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296053309] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:04:38,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146264625] [2021-11-07 08:04:38,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:04:38,982 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:04:38,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:04:38,985 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:04:38,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-07 08:04:40,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:40,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 1432 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 08:04:40,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:04:40,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-11-07 08:04:40,528 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-07 08:04:40,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146264625] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:04:40,529 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:04:40,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-07 08:04:40,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642186558] [2021-11-07 08:04:40,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:04:40,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:04:40,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:04:40,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:04:40,531 INFO L87 Difference]: Start difference. First operand 11837 states and 16308 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:04:42,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:04:42,258 INFO L93 Difference]: Finished difference Result 23753 states and 32785 transitions. [2021-11-07 08:04:42,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:04:42,259 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-11-07 08:04:42,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:04:42,284 INFO L225 Difference]: With dead ends: 23753 [2021-11-07 08:04:42,284 INFO L226 Difference]: Without dead ends: 11929 [2021-11-07 08:04:42,301 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:04:42,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11929 states. [2021-11-07 08:04:43,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11929 to 11929. [2021-11-07 08:04:43,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11929 states, 11556 states have (on average 1.3698511595707858) internal successors, (15830), 11604 states have internal predecessors, (15830), 228 states have call successors, (228), 144 states have call predecessors, (228), 144 states have return successors, (342), 204 states have call predecessors, (342), 228 states have call successors, (342) [2021-11-07 08:04:43,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11929 states to 11929 states and 16400 transitions. [2021-11-07 08:04:43,212 INFO L78 Accepts]: Start accepts. Automaton has 11929 states and 16400 transitions. Word has length 101 [2021-11-07 08:04:43,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:04:43,213 INFO L470 AbstractCegarLoop]: Abstraction has 11929 states and 16400 transitions. [2021-11-07 08:04:43,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:04:43,213 INFO L276 IsEmpty]: Start isEmpty. Operand 11929 states and 16400 transitions. [2021-11-07 08:04:43,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-07 08:04:43,221 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:04:43,221 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:04:43,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-07 08:04:43,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:04:43,438 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 08:04:43,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:04:43,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1224487733, now seen corresponding path program 1 times [2021-11-07 08:04:43,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:04:43,439 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908247443] [2021-11-07 08:04:43,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:04:43,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:04:43,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:43,709 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-07 08:04:43,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:04:43,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908247443] [2021-11-07 08:04:43,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908247443] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:04:43,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911582682] [2021-11-07 08:04:43,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:04:43,710 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:04:43,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:04:43,711 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:04:43,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-07 08:04:44,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:44,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 1468 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 08:04:44,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:04:44,940 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-07 08:04:44,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911582682] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:04:44,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:04:44,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-11-07 08:04:44,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247814185] [2021-11-07 08:04:44,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:04:44,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:04:44,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:04:44,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:04:44,943 INFO L87 Difference]: Start difference. First operand 11929 states and 16400 transitions. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:04:47,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:04:47,049 INFO L93 Difference]: Finished difference Result 26749 states and 36540 transitions. [2021-11-07 08:04:47,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 08:04:47,050 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2021-11-07 08:04:47,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:04:47,081 INFO L225 Difference]: With dead ends: 26749 [2021-11-07 08:04:47,081 INFO L226 Difference]: Without dead ends: 14833 [2021-11-07 08:04:47,099 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:04:47,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14833 states. [2021-11-07 08:04:48,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14833 to 12021. [2021-11-07 08:04:48,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12021 states, 11648 states have (on average 1.366929945054945) internal successors, (15922), 11696 states have internal predecessors, (15922), 228 states have call successors, (228), 144 states have call predecessors, (228), 144 states have return successors, (342), 204 states have call predecessors, (342), 228 states have call successors, (342) [2021-11-07 08:04:48,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12021 states to 12021 states and 16492 transitions. [2021-11-07 08:04:48,128 INFO L78 Accepts]: Start accepts. Automaton has 12021 states and 16492 transitions. Word has length 102 [2021-11-07 08:04:48,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:04:48,128 INFO L470 AbstractCegarLoop]: Abstraction has 12021 states and 16492 transitions. [2021-11-07 08:04:48,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:04:48,129 INFO L276 IsEmpty]: Start isEmpty. Operand 12021 states and 16492 transitions. [2021-11-07 08:04:48,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-07 08:04:48,136 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:04:48,137 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:04:48,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-07 08:04:48,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-07 08:04:48,341 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 08:04:48,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:04:48,342 INFO L85 PathProgramCache]: Analyzing trace with hash -2019898025, now seen corresponding path program 1 times [2021-11-07 08:04:48,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:04:48,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961107106] [2021-11-07 08:04:48,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:04:48,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:04:48,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:48,584 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 08:04:48,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:04:48,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961107106] [2021-11-07 08:04:48,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961107106] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:04:48,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005076770] [2021-11-07 08:04:48,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:04:48,585 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:04:48,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:04:48,589 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:04:48,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-07 08:04:50,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:50,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 1478 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 08:04:50,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:04:50,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-11-07 08:04:50,740 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 08:04:50,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005076770] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:04:50,740 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:04:50,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-11-07 08:04:50,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8698269] [2021-11-07 08:04:50,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:04:50,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:04:50,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:04:50,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:04:50,742 INFO L87 Difference]: Start difference. First operand 12021 states and 16492 transitions. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:04:53,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:04:53,250 INFO L93 Difference]: Finished difference Result 24213 states and 33337 transitions. [2021-11-07 08:04:53,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:04:53,250 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-11-07 08:04:53,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:04:53,276 INFO L225 Difference]: With dead ends: 24213 [2021-11-07 08:04:53,276 INFO L226 Difference]: Without dead ends: 12205 [2021-11-07 08:04:53,295 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:04:53,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12205 states. [2021-11-07 08:04:54,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12205 to 12205. [2021-11-07 08:04:54,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12205 states, 11832 states have (on average 1.3612237998647736) internal successors, (16106), 11880 states have internal predecessors, (16106), 228 states have call successors, (228), 144 states have call predecessors, (228), 144 states have return successors, (342), 204 states have call predecessors, (342), 228 states have call successors, (342) [2021-11-07 08:04:54,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12205 states to 12205 states and 16676 transitions. [2021-11-07 08:04:54,358 INFO L78 Accepts]: Start accepts. Automaton has 12205 states and 16676 transitions. Word has length 103 [2021-11-07 08:04:54,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:04:54,359 INFO L470 AbstractCegarLoop]: Abstraction has 12205 states and 16676 transitions. [2021-11-07 08:04:54,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:04:54,359 INFO L276 IsEmpty]: Start isEmpty. Operand 12205 states and 16676 transitions. [2021-11-07 08:04:54,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-07 08:04:54,367 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:04:54,367 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:04:54,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-07 08:04:54,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:04:54,568 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 08:04:54,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:04:54,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1768725035, now seen corresponding path program 2 times [2021-11-07 08:04:54,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:04:54,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774507446] [2021-11-07 08:04:54,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:04:54,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:04:54,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:54,824 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 30 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-07 08:04:54,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:04:54,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774507446] [2021-11-07 08:04:54,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774507446] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:04:54,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598767704] [2021-11-07 08:04:54,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:04:54,826 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:04:54,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:04:54,827 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:04:54,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-07 08:04:58,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:04:58,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:04:58,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 1520 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 08:04:58,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:04:58,681 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 30 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-07 08:04:58,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598767704] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:04:58,681 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:04:58,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-11-07 08:04:58,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739531813] [2021-11-07 08:04:58,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 08:04:58,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:04:58,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 08:04:58,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:04:58,683 INFO L87 Difference]: Start difference. First operand 12205 states and 16676 transitions. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:05:01,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:05:01,948 INFO L93 Difference]: Finished difference Result 24489 states and 33521 transitions. [2021-11-07 08:05:01,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 08:05:01,948 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-11-07 08:05:01,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:05:01,973 INFO L225 Difference]: With dead ends: 24489 [2021-11-07 08:05:01,974 INFO L226 Difference]: Without dead ends: 12297 [2021-11-07 08:05:01,987 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:05:01,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12297 states. [2021-11-07 08:05:02,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12297 to 12297. [2021-11-07 08:05:02,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12297 states, 11924 states have (on average 1.3584367661858436) internal successors, (16198), 11972 states have internal predecessors, (16198), 228 states have call successors, (228), 144 states have call predecessors, (228), 144 states have return successors, (342), 204 states have call predecessors, (342), 228 states have call successors, (342) [2021-11-07 08:05:02,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12297 states to 12297 states and 16768 transitions. [2021-11-07 08:05:02,962 INFO L78 Accepts]: Start accepts. Automaton has 12297 states and 16768 transitions. Word has length 105 [2021-11-07 08:05:02,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:05:02,963 INFO L470 AbstractCegarLoop]: Abstraction has 12297 states and 16768 transitions. [2021-11-07 08:05:02,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:05:02,963 INFO L276 IsEmpty]: Start isEmpty. Operand 12297 states and 16768 transitions. [2021-11-07 08:05:02,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-07 08:05:02,972 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:05:02,972 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:05:03,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-07 08:05:03,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:05:03,182 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 08:05:03,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:05:03,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1435682445, now seen corresponding path program 3 times [2021-11-07 08:05:03,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:05:03,183 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365151821] [2021-11-07 08:05:03,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:05:03,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:05:03,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:03,459 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 30 proven. 6 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-07 08:05:03,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:05:03,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365151821] [2021-11-07 08:05:03,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365151821] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:05:03,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329505159] [2021-11-07 08:05:03,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:05:03,460 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:05:03,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:05:03,462 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:05:03,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-07 08:05:08,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-07 08:05:08,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:05:08,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 1250 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-07 08:05:08,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:05:08,863 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-07 08:05:08,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329505159] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:05:08,864 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:05:08,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2021-11-07 08:05:08,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633116543] [2021-11-07 08:05:08,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 08:05:08,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:05:08,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 08:05:08,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-11-07 08:05:08,866 INFO L87 Difference]: Start difference. First operand 12297 states and 16768 transitions. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:05:31,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:05:31,523 INFO L93 Difference]: Finished difference Result 108859 states and 142302 transitions. [2021-11-07 08:05:31,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-11-07 08:05:31,524 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-11-07 08:05:31,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:05:31,768 INFO L225 Difference]: With dead ends: 108859 [2021-11-07 08:05:31,768 INFO L226 Difference]: Without dead ends: 96575 [2021-11-07 08:05:31,904 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3697 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1632, Invalid=8468, Unknown=0, NotChecked=0, Total=10100 [2021-11-07 08:05:31,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96575 states. [2021-11-07 08:05:34,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96575 to 12275. [2021-11-07 08:05:34,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12275 states, 11902 states have (on average 1.354898336414048) internal successors, (16126), 11950 states have internal predecessors, (16126), 228 states have call successors, (228), 144 states have call predecessors, (228), 144 states have return successors, (342), 204 states have call predecessors, (342), 228 states have call successors, (342) [2021-11-07 08:05:34,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12275 states to 12275 states and 16696 transitions. [2021-11-07 08:05:34,170 INFO L78 Accepts]: Start accepts. Automaton has 12275 states and 16696 transitions. Word has length 106 [2021-11-07 08:05:34,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:05:34,170 INFO L470 AbstractCegarLoop]: Abstraction has 12275 states and 16696 transitions. [2021-11-07 08:05:34,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:05:34,171 INFO L276 IsEmpty]: Start isEmpty. Operand 12275 states and 16696 transitions. [2021-11-07 08:05:34,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-07 08:05:34,178 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:05:34,178 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:05:34,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-07 08:05:34,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-11-07 08:05:34,382 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 08:05:34,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:05:34,382 INFO L85 PathProgramCache]: Analyzing trace with hash -746468658, now seen corresponding path program 1 times [2021-11-07 08:05:34,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:05:34,382 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598515666] [2021-11-07 08:05:34,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:05:34,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:05:34,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:34,614 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 7 proven. 81 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 08:05:34,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:05:34,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598515666] [2021-11-07 08:05:34,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598515666] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:05:34,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114378116] [2021-11-07 08:05:34,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:05:34,614 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:05:34,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:05:34,616 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:05:34,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-07 08:05:35,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:35,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 1579 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 08:05:35,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:05:35,830 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 7 proven. 81 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 08:05:35,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114378116] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:05:35,831 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:05:35,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-11-07 08:05:35,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124014629] [2021-11-07 08:05:35,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 08:05:35,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:05:35,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 08:05:35,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-07 08:05:35,833 INFO L87 Difference]: Start difference. First operand 12275 states and 16696 transitions. Second operand has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 13 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:05:37,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:05:37,579 INFO L93 Difference]: Finished difference Result 24577 states and 33437 transitions. [2021-11-07 08:05:37,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 08:05:37,580 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 13 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-11-07 08:05:37,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:05:37,602 INFO L225 Difference]: With dead ends: 24577 [2021-11-07 08:05:37,602 INFO L226 Difference]: Without dead ends: 12315 [2021-11-07 08:05:37,616 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-07 08:05:37,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12315 states. [2021-11-07 08:05:39,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12315 to 12315. [2021-11-07 08:05:39,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12315 states, 11942 states have (on average 1.3537095963825154) internal successors, (16166), 11990 states have internal predecessors, (16166), 228 states have call successors, (228), 144 states have call predecessors, (228), 144 states have return successors, (342), 204 states have call predecessors, (342), 228 states have call successors, (342) [2021-11-07 08:05:39,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12315 states to 12315 states and 16736 transitions. [2021-11-07 08:05:39,234 INFO L78 Accepts]: Start accepts. Automaton has 12315 states and 16736 transitions. Word has length 106 [2021-11-07 08:05:39,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:05:39,235 INFO L470 AbstractCegarLoop]: Abstraction has 12315 states and 16736 transitions. [2021-11-07 08:05:39,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 13 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:05:39,235 INFO L276 IsEmpty]: Start isEmpty. Operand 12315 states and 16736 transitions. [2021-11-07 08:05:39,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-07 08:05:39,242 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:05:39,243 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:05:39,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-07 08:05:39,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:05:39,456 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 08:05:39,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:05:39,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1376233582, now seen corresponding path program 2 times [2021-11-07 08:05:39,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:05:39,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203231462] [2021-11-07 08:05:39,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:05:39,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:05:39,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:39,606 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-07 08:05:39,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:05:39,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203231462] [2021-11-07 08:05:39,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203231462] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:05:39,607 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:05:39,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:05:39,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989903835] [2021-11-07 08:05:39,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:05:39,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:05:39,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:05:39,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:05:39,609 INFO L87 Difference]: Start difference. First operand 12315 states and 16736 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:05:42,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:05:42,330 INFO L93 Difference]: Finished difference Result 30097 states and 40644 transitions. [2021-11-07 08:05:42,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:05:42,330 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2021-11-07 08:05:42,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:05:42,359 INFO L225 Difference]: With dead ends: 30097 [2021-11-07 08:05:42,359 INFO L226 Difference]: Without dead ends: 17755 [2021-11-07 08:05:42,375 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:05:42,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17755 states. [2021-11-07 08:05:44,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17755 to 12315. [2021-11-07 08:05:44,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12315 states, 11942 states have (on average 1.3520348350360074) internal successors, (16146), 11990 states have internal predecessors, (16146), 228 states have call successors, (228), 144 states have call predecessors, (228), 144 states have return successors, (342), 204 states have call predecessors, (342), 228 states have call successors, (342) [2021-11-07 08:05:44,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12315 states to 12315 states and 16716 transitions. [2021-11-07 08:05:44,129 INFO L78 Accepts]: Start accepts. Automaton has 12315 states and 16716 transitions. Word has length 108 [2021-11-07 08:05:44,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:05:44,129 INFO L470 AbstractCegarLoop]: Abstraction has 12315 states and 16716 transitions. [2021-11-07 08:05:44,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:05:44,129 INFO L276 IsEmpty]: Start isEmpty. Operand 12315 states and 16716 transitions. [2021-11-07 08:05:44,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-07 08:05:44,135 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:05:44,135 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:05:44,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-11-07 08:05:44,135 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 08:05:44,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:05:44,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1690380302, now seen corresponding path program 1 times [2021-11-07 08:05:44,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:05:44,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822533533] [2021-11-07 08:05:44,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:05:44,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:05:44,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:44,815 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-07 08:05:44,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:05:44,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822533533] [2021-11-07 08:05:44,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822533533] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:05:44,816 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:05:44,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-07 08:05:44,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588698130] [2021-11-07 08:05:44,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 08:05:44,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:05:44,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 08:05:44,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-07 08:05:44,817 INFO L87 Difference]: Start difference. First operand 12315 states and 16716 transitions. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:06:37,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:06:37,762 INFO L93 Difference]: Finished difference Result 77455 states and 103214 transitions. [2021-11-07 08:06:37,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-11-07 08:06:37,763 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-11-07 08:06:37,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:06:37,888 INFO L225 Difference]: With dead ends: 77455 [2021-11-07 08:06:37,888 INFO L226 Difference]: Without dead ends: 65135 [2021-11-07 08:06:37,919 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3512 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1782, Invalid=7338, Unknown=0, NotChecked=0, Total=9120 [2021-11-07 08:06:37,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65135 states. [2021-11-07 08:06:41,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65135 to 18478. [2021-11-07 08:06:41,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18478 states, 17919 states have (on average 1.3497963055974105) internal successors, (24187), 17991 states have internal predecessors, (24187), 342 states have call successors, (342), 216 states have call predecessors, (342), 216 states have return successors, (456), 306 states have call predecessors, (456), 342 states have call successors, (456) [2021-11-07 08:06:41,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18478 states to 18478 states and 24985 transitions. [2021-11-07 08:06:41,594 INFO L78 Accepts]: Start accepts. Automaton has 18478 states and 24985 transitions. Word has length 110 [2021-11-07 08:06:41,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:06:41,594 INFO L470 AbstractCegarLoop]: Abstraction has 18478 states and 24985 transitions. [2021-11-07 08:06:41,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:06:41,594 INFO L276 IsEmpty]: Start isEmpty. Operand 18478 states and 24985 transitions. [2021-11-07 08:06:41,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-07 08:06:41,599 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:06:41,599 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:06:41,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-11-07 08:06:41,600 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 08:06:41,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:06:41,600 INFO L85 PathProgramCache]: Analyzing trace with hash -132372377, now seen corresponding path program 1 times [2021-11-07 08:06:41,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:06:41,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233966716] [2021-11-07 08:06:41,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:06:41,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:06:41,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:06:41,811 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 30 proven. 6 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-07 08:06:41,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:06:41,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233966716] [2021-11-07 08:06:41,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233966716] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:06:41,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951820007] [2021-11-07 08:06:41,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:06:41,812 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:06:41,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:06:41,818 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:06:41,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-07 08:06:43,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:06:43,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 1595 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-07 08:06:43,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:06:43,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-11-07 08:06:44,010 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 30 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-07 08:06:44,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951820007] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:06:44,010 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:06:44,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-11-07 08:06:44,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553611446] [2021-11-07 08:06:44,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 08:06:44,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:06:44,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 08:06:44,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-07 08:06:44,012 INFO L87 Difference]: Start difference. First operand 18478 states and 24985 transitions. Second operand has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:06:51,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:06:51,318 INFO L93 Difference]: Finished difference Result 37219 states and 50507 transitions. [2021-11-07 08:06:51,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 08:06:51,318 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-11-07 08:06:51,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:06:51,361 INFO L225 Difference]: With dead ends: 37219 [2021-11-07 08:06:51,361 INFO L226 Difference]: Without dead ends: 18754 [2021-11-07 08:06:51,384 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-07 08:06:51,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18754 states. [2021-11-07 08:06:54,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18754 to 18754. [2021-11-07 08:06:54,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18754 states, 18195 states have (on average 1.3444902445726847) internal successors, (24463), 18267 states have internal predecessors, (24463), 342 states have call successors, (342), 216 states have call predecessors, (342), 216 states have return successors, (456), 306 states have call predecessors, (456), 342 states have call successors, (456) [2021-11-07 08:06:54,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18754 states to 18754 states and 25261 transitions. [2021-11-07 08:06:54,684 INFO L78 Accepts]: Start accepts. Automaton has 18754 states and 25261 transitions. Word has length 112 [2021-11-07 08:06:54,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:06:54,685 INFO L470 AbstractCegarLoop]: Abstraction has 18754 states and 25261 transitions. [2021-11-07 08:06:54,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:06:54,685 INFO L276 IsEmpty]: Start isEmpty. Operand 18754 states and 25261 transitions. [2021-11-07 08:06:54,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-07 08:06:54,692 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:06:54,693 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:06:54,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-07 08:06:54,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-07 08:06:54,898 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 08:06:54,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:06:54,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1863590939, now seen corresponding path program 2 times [2021-11-07 08:06:54,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:06:54,899 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098344570] [2021-11-07 08:06:54,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:06:54,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:06:55,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:06:55,313 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 30 proven. 6 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-07 08:06:55,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:06:55,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098344570] [2021-11-07 08:06:55,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098344570] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:06:55,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938384689] [2021-11-07 08:06:55,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:06:55,314 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:06:55,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:06:55,315 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:06:55,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-07 08:06:58,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:06:58,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:06:58,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 1637 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-07 08:06:58,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:06:58,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-11-07 08:06:58,598 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 30 proven. 6 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-07 08:06:58,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938384689] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:06:58,598 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:06:58,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-11-07 08:06:58,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664351859] [2021-11-07 08:06:58,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 08:06:58,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:06:58,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 08:06:58,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-07 08:06:58,600 INFO L87 Difference]: Start difference. First operand 18754 states and 25261 transitions. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:07:10,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:07:10,359 INFO L93 Difference]: Finished difference Result 37633 states and 50783 transitions. [2021-11-07 08:07:10,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:07:10,360 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2021-11-07 08:07:10,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:07:10,390 INFO L225 Difference]: With dead ends: 37633 [2021-11-07 08:07:10,390 INFO L226 Difference]: Without dead ends: 18892 [2021-11-07 08:07:10,404 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-07 08:07:10,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18892 states. [2021-11-07 08:07:13,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18892 to 18892. [2021-11-07 08:07:13,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18892 states, 18333 states have (on average 1.34189712540228) internal successors, (24601), 18405 states have internal predecessors, (24601), 342 states have call successors, (342), 216 states have call predecessors, (342), 216 states have return successors, (456), 306 states have call predecessors, (456), 342 states have call successors, (456) [2021-11-07 08:07:13,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18892 states to 18892 states and 25399 transitions. [2021-11-07 08:07:13,571 INFO L78 Accepts]: Start accepts. Automaton has 18892 states and 25399 transitions. Word has length 114 [2021-11-07 08:07:13,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:07:13,571 INFO L470 AbstractCegarLoop]: Abstraction has 18892 states and 25399 transitions. [2021-11-07 08:07:13,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:07:13,571 INFO L276 IsEmpty]: Start isEmpty. Operand 18892 states and 25399 transitions. [2021-11-07 08:07:13,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-07 08:07:13,576 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:07:13,577 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:07:13,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-07 08:07:13,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-07 08:07:13,777 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 08:07:13,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:07:13,778 INFO L85 PathProgramCache]: Analyzing trace with hash -41991543, now seen corresponding path program 3 times [2021-11-07 08:07:13,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:07:13,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588397654] [2021-11-07 08:07:13,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:07:13,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:07:13,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:07:14,177 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 30 proven. 10 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-07 08:07:14,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:07:14,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588397654] [2021-11-07 08:07:14,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588397654] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:07:14,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308172499] [2021-11-07 08:07:14,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:07:14,178 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:07:14,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:07:14,179 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:07:14,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-07 08:07:19,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-07 08:07:19,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:07:19,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 1319 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-07 08:07:19,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:07:20,193 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-07 08:07:20,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308172499] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:07:20,194 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:07:20,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [7] total 16 [2021-11-07 08:07:20,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378541229] [2021-11-07 08:07:20,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 08:07:20,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:07:20,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 08:07:20,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-11-07 08:07:20,195 INFO L87 Difference]: Start difference. First operand 18892 states and 25399 transitions. Second operand has 11 states, 11 states have (on average 9.0) internal successors, (99), 11 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:07:52,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:07:52,703 INFO L93 Difference]: Finished difference Result 111505 states and 147354 transitions. [2021-11-07 08:07:52,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-11-07 08:07:52,703 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 9.0) internal successors, (99), 11 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-11-07 08:07:52,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:07:52,876 INFO L225 Difference]: With dead ends: 111505 [2021-11-07 08:07:52,876 INFO L226 Difference]: Without dead ends: 95089 [2021-11-07 08:07:52,916 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3000 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1584, Invalid=7158, Unknown=0, NotChecked=0, Total=8742 [2021-11-07 08:07:53,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95089 states. [2021-11-07 08:07:58,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95089 to 23996. [2021-11-07 08:07:58,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23996 states, 23263 states have (on average 1.345871125822121) internal successors, (31309), 23353 states have internal predecessors, (31309), 444 states have call successors, (444), 288 states have call predecessors, (444), 288 states have return successors, (558), 402 states have call predecessors, (558), 444 states have call successors, (558) [2021-11-07 08:07:58,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23996 states to 23996 states and 32311 transitions. [2021-11-07 08:07:58,535 INFO L78 Accepts]: Start accepts. Automaton has 23996 states and 32311 transitions. Word has length 115 [2021-11-07 08:07:58,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:07:58,535 INFO L470 AbstractCegarLoop]: Abstraction has 23996 states and 32311 transitions. [2021-11-07 08:07:58,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.0) internal successors, (99), 11 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:07:58,536 INFO L276 IsEmpty]: Start isEmpty. Operand 23996 states and 32311 transitions. [2021-11-07 08:07:58,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-07 08:07:58,545 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:07:58,545 INFO L513 BasicCegarLoop]: trace histogram [7, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:07:58,573 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-11-07 08:07:58,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-07 08:07:58,746 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 08:07:58,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:07:58,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1924743582, now seen corresponding path program 1 times [2021-11-07 08:07:58,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:07:58,747 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704979292] [2021-11-07 08:07:58,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:07:58,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:07:58,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:07:58,904 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 30 proven. 9 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-07 08:07:58,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:07:58,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704979292] [2021-11-07 08:07:58,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704979292] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:07:58,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417976057] [2021-11-07 08:07:58,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:07:58,905 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:07:58,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:07:58,906 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:07:58,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-07 08:08:00,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:08:00,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 1803 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 08:08:00,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:08:00,602 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-07 08:08:00,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417976057] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:08:00,603 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:08:00,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2021-11-07 08:08:00,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515466081] [2021-11-07 08:08:00,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:08:00,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:08:00,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:08:00,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:08:00,605 INFO L87 Difference]: Start difference. First operand 23996 states and 32311 transitions. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:06,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:08:06,877 INFO L93 Difference]: Finished difference Result 35008 states and 47263 transitions. [2021-11-07 08:08:06,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:08:06,877 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2021-11-07 08:08:06,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:08:06,917 INFO L225 Difference]: With dead ends: 35008 [2021-11-07 08:08:06,917 INFO L226 Difference]: Without dead ends: 23873 [2021-11-07 08:08:06,929 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:08:06,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23873 states. [2021-11-07 08:08:11,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23873 to 23868. [2021-11-07 08:08:11,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23868 states, 23135 states have (on average 1.346315106980765) internal successors, (31147), 23225 states have internal predecessors, (31147), 444 states have call successors, (444), 288 states have call predecessors, (444), 288 states have return successors, (558), 402 states have call predecessors, (558), 444 states have call successors, (558) [2021-11-07 08:08:11,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23868 states to 23868 states and 32149 transitions. [2021-11-07 08:08:11,978 INFO L78 Accepts]: Start accepts. Automaton has 23868 states and 32149 transitions. Word has length 127 [2021-11-07 08:08:11,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:08:11,978 INFO L470 AbstractCegarLoop]: Abstraction has 23868 states and 32149 transitions. [2021-11-07 08:08:11,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:11,979 INFO L276 IsEmpty]: Start isEmpty. Operand 23868 states and 32149 transitions. [2021-11-07 08:08:11,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-07 08:08:11,992 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:08:11,992 INFO L513 BasicCegarLoop]: trace histogram [7, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:08:12,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-07 08:08:12,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb54195d-c84f-43a5-8a55-243dda58b942/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-07 08:08:12,199 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 08:08:12,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:08:12,201 INFO L85 PathProgramCache]: Analyzing trace with hash 863178764, now seen corresponding path program 2 times [2021-11-07 08:08:12,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:08:12,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763698062] [2021-11-07 08:08:12,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:08:12,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:08:12,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:08:12,306 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-07 08:08:12,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:08:12,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763698062] [2021-11-07 08:08:12,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763698062] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:08:12,307 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:08:12,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:08:12,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75682997] [2021-11-07 08:08:12,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:08:12,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:08:12,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:08:12,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:08:12,309 INFO L87 Difference]: Start difference. First operand 23868 states and 32149 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)