./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 aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/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_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0 --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-aef121e [2021-11-22 14:46:38,952 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 14:46:38,954 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 14:46:39,011 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 14:46:39,011 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 14:46:39,015 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 14:46:39,017 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 14:46:39,021 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 14:46:39,024 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 14:46:39,033 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 14:46:39,034 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 14:46:39,035 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 14:46:39,035 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 14:46:39,036 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 14:46:39,038 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 14:46:39,039 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 14:46:39,040 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 14:46:39,041 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 14:46:39,042 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 14:46:39,049 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 14:46:39,053 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 14:46:39,054 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 14:46:39,058 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 14:46:39,059 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 14:46:39,066 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 14:46:39,069 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 14:46:39,069 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 14:46:39,071 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 14:46:39,072 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 14:46:39,074 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 14:46:39,074 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 14:46:39,075 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 14:46:39,077 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 14:46:39,078 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 14:46:39,080 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 14:46:39,080 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 14:46:39,081 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 14:46:39,081 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 14:46:39,081 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 14:46:39,082 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 14:46:39,083 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 14:46:39,084 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-22 14:46:39,126 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 14:46:39,126 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 14:46:39,127 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 14:46:39,127 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 14:46:39,132 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 14:46:39,132 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 14:46:39,133 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 14:46:39,133 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 14:46:39,133 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 14:46:39,133 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 14:46:39,134 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-22 14:46:39,135 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 14:46:39,135 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-22 14:46:39,135 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-22 14:46:39,135 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 14:46:39,136 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-22 14:46:39,136 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 14:46:39,136 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 14:46:39,136 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 14:46:39,137 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 14:46:39,137 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 14:46:39,137 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 14:46:39,137 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-22 14:46:39,138 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-22 14:46:39,138 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-22 14:46:39,138 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-22 14:46:39,138 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-22 14:46:39,139 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-22 14:46:39,139 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 14:46:39,140 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_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be936ec9376452d086f72aa92ac4fe7deb233a068e40e0ed8f478fbc228d19b6 [2021-11-22 14:46:39,421 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 14:46:39,440 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 14:46:39,442 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 14:46:39,443 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 14:46:39,445 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 14:46:39,447 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/../../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 [2021-11-22 14:46:39,516 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/data/6e2fe0561/1ccd173db12e4c1782a50d56aafecacb/FLAG285966c23 [2021-11-22 14:46:40,295 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 14:46:40,296 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/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 [2021-11-22 14:46:40,355 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/data/6e2fe0561/1ccd173db12e4c1782a50d56aafecacb/FLAG285966c23 [2021-11-22 14:46:40,851 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/data/6e2fe0561/1ccd173db12e4c1782a50d56aafecacb [2021-11-22 14:46:40,854 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 14:46:40,855 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 14:46:40,860 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 14:46:40,861 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 14:46:40,863 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 14:46:40,864 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:46:40" (1/1) ... [2021-11-22 14:46:40,865 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64e1956e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:46:40, skipping insertion in model container [2021-11-22 14:46:40,865 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:46:40" (1/1) ... [2021-11-22 14:46:40,890 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 14:46:41,026 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 14:46:41,999 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/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] [2021-11-22 14:46:42,645 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 14:46:42,690 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 14:46:42,875 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/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] [2021-11-22 14:46:43,052 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 14:46:43,248 INFO L208 MainTranslator]: Completed translation [2021-11-22 14:46:43,248 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:46:43 WrapperNode [2021-11-22 14:46:43,248 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 14:46:43,250 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 14:46:43,250 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 14:46:43,250 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 14:46:43,285 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:46:43" (1/1) ... [2021-11-22 14:46:43,376 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:46:43" (1/1) ... [2021-11-22 14:46:43,576 INFO L137 Inliner]: procedures = 169, calls = 719, calls flagged for inlining = 215, calls inlined = 297, statements flattened = 4013 [2021-11-22 14:46:43,593 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 14:46:43,593 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 14:46:43,594 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 14:46:43,594 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 14:46:43,604 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:46:43" (1/1) ... [2021-11-22 14:46:43,604 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:46:43" (1/1) ... [2021-11-22 14:46:43,630 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:46:43" (1/1) ... [2021-11-22 14:46:43,631 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:46:43" (1/1) ... [2021-11-22 14:46:43,820 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:46:43" (1/1) ... [2021-11-22 14:46:43,863 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:46:43" (1/1) ... [2021-11-22 14:46:43,891 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:46:43" (1/1) ... [2021-11-22 14:46:43,927 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 14:46:43,929 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 14:46:43,929 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 14:46:43,930 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 14:46:43,931 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:46:43" (1/1) ... [2021-11-22 14:46:43,941 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 14:46:43,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:46:43,978 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-22 14:46:43,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-22 14:46:44,040 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-22 14:46:44,041 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_4 [2021-11-22 14:46:44,042 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_4 [2021-11-22 14:46:44,042 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_2 [2021-11-22 14:46:44,042 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_2 [2021-11-22 14:46:44,042 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-22 14:46:44,043 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-22 14:46:44,043 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-22 14:46:44,043 INFO L130 BoogieDeclarations]: Found specification of procedure ems_usb_read_bulk_callback [2021-11-22 14:46:44,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ems_usb_read_bulk_callback [2021-11-22 14:46:44,043 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_urb [2021-11-22 14:46:44,044 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_urb [2021-11-22 14:46:44,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-22 14:46:44,044 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-22 14:46:44,044 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-22 14:46:44,044 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-22 14:46:44,045 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-22 14:46:44,045 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-22 14:46:44,045 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-22 14:46:44,045 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-22 14:46:44,046 INFO L130 BoogieDeclarations]: Found specification of procedure ems_usb_read_interrupt_callback [2021-11-22 14:46:44,046 INFO L138 BoogieDeclarations]: Found implementation of procedure ems_usb_read_interrupt_callback [2021-11-22 14:46:44,046 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-22 14:46:44,046 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-22 14:46:44,046 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-22 14:46:44,047 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-22 14:46:44,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 14:46:44,047 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 14:46:44,704 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 14:46:44,706 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 14:46:51,237 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 14:46:51,251 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 14:46:51,251 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-22 14:46:51,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:46:51 BoogieIcfgContainer [2021-11-22 14:46:51,255 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 14:46:51,257 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 14:46:51,257 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 14:46:51,264 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 14:46:51,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:46:40" (1/3) ... [2021-11-22 14:46:51,265 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6587fab9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:46:51, skipping insertion in model container [2021-11-22 14:46:51,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:46:43" (2/3) ... [2021-11-22 14:46:51,266 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6587fab9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:46:51, skipping insertion in model container [2021-11-22 14:46:51,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:46:51" (3/3) ... [2021-11-22 14:46:51,268 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 [2021-11-22 14:46:51,274 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 14:46:51,274 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-22 14:46:51,351 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 14:46:51,360 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 [2021-11-22 14:46:51,361 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-22 14:46:51,407 INFO L276 IsEmpty]: Start isEmpty. Operand has 668 states, 645 states have (on average 1.4) internal successors, (903), 652 states have internal predecessors, (903), 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) [2021-11-22 14:46:51,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-22 14:46:51,446 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:46:51,447 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:46:51,448 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)] === [2021-11-22 14:46:51,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:46:51,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1446138353, now seen corresponding path program 1 times [2021-11-22 14:46:51,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:46:51,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071953157] [2021-11-22 14:46:51,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:46:51,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:46:51,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:46:52,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:46:52,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:46:52,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071953157] [2021-11-22 14:46:52,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071953157] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:46:52,008 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:46:52,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 14:46:52,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489087739] [2021-11-22 14:46:52,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:46:52,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:46:52,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:46:52,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:46:52,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:46:52,050 INFO L87 Difference]: Start difference. First operand has 668 states, 645 states have (on average 1.4) internal successors, (903), 652 states have internal predecessors, (903), 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 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:46:52,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:46:52,957 INFO L93 Difference]: Finished difference Result 1937 states and 2715 transitions. [2021-11-22 14:46:52,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:46:52,970 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-22 14:46:52,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:46:53,001 INFO L225 Difference]: With dead ends: 1937 [2021-11-22 14:46:53,001 INFO L226 Difference]: Without dead ends: 1256 [2021-11-22 14:46:53,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:46:53,013 INFO L933 BasicCegarLoop]: 906 mSDtfsCounter, 844 mSDsluCounter, 876 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 844 SdHoareTripleChecker+Valid, 1782 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-22 14:46:53,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [844 Valid, 1782 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-22 14:46:53,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1256 states. [2021-11-22 14:46:53,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1256 to 1256. [2021-11-22 14:46:53,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1256 states, 1217 states have (on average 1.3648315529991784) internal successors, (1661), 1225 states have internal predecessors, (1661), 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) [2021-11-22 14:46:53,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1256 states to 1256 states and 1705 transitions. [2021-11-22 14:46:53,183 INFO L78 Accepts]: Start accepts. Automaton has 1256 states and 1705 transitions. Word has length 19 [2021-11-22 14:46:53,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:46:53,184 INFO L470 AbstractCegarLoop]: Abstraction has 1256 states and 1705 transitions. [2021-11-22 14:46:53,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:46:53,187 INFO L276 IsEmpty]: Start isEmpty. Operand 1256 states and 1705 transitions. [2021-11-22 14:46:53,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-22 14:46:53,191 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:46:53,192 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:46:53,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-22 14:46:53,193 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)] === [2021-11-22 14:46:53,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:46:53,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1960196166, now seen corresponding path program 1 times [2021-11-22 14:46:53,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:46:53,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643845108] [2021-11-22 14:46:53,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:46:53,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:46:53,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:46:53,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:46:53,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:46:53,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643845108] [2021-11-22 14:46:53,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643845108] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:46:53,405 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:46:53,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 14:46:53,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262410386] [2021-11-22 14:46:53,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:46:53,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:46:53,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:46:53,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:46:53,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:46:53,409 INFO L87 Difference]: Start difference. First operand 1256 states and 1705 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) [2021-11-22 14:46:53,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:46:53,661 INFO L93 Difference]: Finished difference Result 3740 states and 5150 transitions. [2021-11-22 14:46:53,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:46:53,662 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 [2021-11-22 14:46:53,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:46:53,683 INFO L225 Difference]: With dead ends: 3740 [2021-11-22 14:46:53,683 INFO L226 Difference]: Without dead ends: 2497 [2021-11-22 14:46:53,690 INFO L932 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 [2021-11-22 14:46:53,696 INFO L933 BasicCegarLoop]: 881 mSDtfsCounter, 856 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 856 SdHoareTripleChecker+Valid, 1714 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:46:53,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [856 Valid, 1714 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:46:53,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2497 states. [2021-11-22 14:46:53,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2497 to 2485. [2021-11-22 14:46:53,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2485 states, 2412 states have (on average 1.3598673300165838) internal successors, (3280), 2424 states have internal predecessors, (3280), 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) [2021-11-22 14:46:53,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2485 states to 2485 states and 3390 transitions. [2021-11-22 14:46:53,871 INFO L78 Accepts]: Start accepts. Automaton has 2485 states and 3390 transitions. Word has length 25 [2021-11-22 14:46:53,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:46:53,871 INFO L470 AbstractCegarLoop]: Abstraction has 2485 states and 3390 transitions. [2021-11-22 14:46:53,872 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) [2021-11-22 14:46:53,873 INFO L276 IsEmpty]: Start isEmpty. Operand 2485 states and 3390 transitions. [2021-11-22 14:46:53,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-22 14:46:53,880 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:46:53,880 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:46:53,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-22 14:46:53,881 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)] === [2021-11-22 14:46:53,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:46:53,882 INFO L85 PathProgramCache]: Analyzing trace with hash -636538555, now seen corresponding path program 1 times [2021-11-22 14:46:53,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:46:53,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601525622] [2021-11-22 14:46:53,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:46:53,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:46:53,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:46:54,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:46:54,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:46:54,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601525622] [2021-11-22 14:46:54,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601525622] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:46:54,067 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:46:54,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 14:46:54,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793803971] [2021-11-22 14:46:54,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:46:54,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:46:54,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:46:54,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:46:54,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:46:54,070 INFO L87 Difference]: Start difference. First operand 2485 states and 3390 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) [2021-11-22 14:46:54,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:46:54,224 INFO L93 Difference]: Finished difference Result 2485 states and 3390 transitions. [2021-11-22 14:46:54,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:46:54,226 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 [2021-11-22 14:46:54,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:46:54,245 INFO L225 Difference]: With dead ends: 2485 [2021-11-22 14:46:54,245 INFO L226 Difference]: Without dead ends: 2483 [2021-11-22 14:46:54,246 INFO L932 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 [2021-11-22 14:46:54,254 INFO L933 BasicCegarLoop]: 877 mSDtfsCounter, 854 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 854 SdHoareTripleChecker+Valid, 877 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:46:54,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [854 Valid, 877 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:46:54,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2483 states. [2021-11-22 14:46:54,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2483 to 2483. [2021-11-22 14:46:54,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2483 states, 2411 states have (on average 1.3596018249688926) internal successors, (3278), 2422 states have internal predecessors, (3278), 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) [2021-11-22 14:46:54,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2483 states to 2483 states and 3388 transitions. [2021-11-22 14:46:54,415 INFO L78 Accepts]: Start accepts. Automaton has 2483 states and 3388 transitions. Word has length 26 [2021-11-22 14:46:54,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:46:54,416 INFO L470 AbstractCegarLoop]: Abstraction has 2483 states and 3388 transitions. [2021-11-22 14:46:54,416 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) [2021-11-22 14:46:54,417 INFO L276 IsEmpty]: Start isEmpty. Operand 2483 states and 3388 transitions. [2021-11-22 14:46:54,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-22 14:46:54,418 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:46:54,418 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:46:54,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-22 14:46:54,419 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)] === [2021-11-22 14:46:54,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:46:54,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1742141733, now seen corresponding path program 1 times [2021-11-22 14:46:54,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:46:54,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730034840] [2021-11-22 14:46:54,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:46:54,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:46:54,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:46:54,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:46:54,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:46:54,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730034840] [2021-11-22 14:46:54,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730034840] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:46:54,569 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:46:54,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 14:46:54,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856311676] [2021-11-22 14:46:54,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:46:54,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:46:54,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:46:54,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:46:54,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:46:54,572 INFO L87 Difference]: Start difference. First operand 2483 states and 3388 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) [2021-11-22 14:46:54,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:46:54,694 INFO L93 Difference]: Finished difference Result 2483 states and 3388 transitions. [2021-11-22 14:46:54,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:46:54,695 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 [2021-11-22 14:46:54,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:46:54,713 INFO L225 Difference]: With dead ends: 2483 [2021-11-22 14:46:54,713 INFO L226 Difference]: Without dead ends: 2481 [2021-11-22 14:46:54,717 INFO L932 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 [2021-11-22 14:46:54,721 INFO L933 BasicCegarLoop]: 875 mSDtfsCounter, 851 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 851 SdHoareTripleChecker+Valid, 875 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:46:54,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [851 Valid, 875 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:46:54,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2481 states. [2021-11-22 14:46:54,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2481 to 2481. [2021-11-22 14:46:54,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2481 states, 2410 states have (on average 1.3593360995850623) internal successors, (3276), 2420 states have internal predecessors, (3276), 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) [2021-11-22 14:46:54,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2481 states to 2481 states and 3386 transitions. [2021-11-22 14:46:54,867 INFO L78 Accepts]: Start accepts. Automaton has 2481 states and 3386 transitions. Word has length 27 [2021-11-22 14:46:54,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:46:54,868 INFO L470 AbstractCegarLoop]: Abstraction has 2481 states and 3386 transitions. [2021-11-22 14:46:54,868 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) [2021-11-22 14:46:54,868 INFO L276 IsEmpty]: Start isEmpty. Operand 2481 states and 3386 transitions. [2021-11-22 14:46:54,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-22 14:46:54,869 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:46:54,869 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:46:54,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-22 14:46:54,870 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)] === [2021-11-22 14:46:54,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:46:54,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1828180656, now seen corresponding path program 1 times [2021-11-22 14:46:54,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:46:54,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264457083] [2021-11-22 14:46:54,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:46:54,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:46:54,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:46:55,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:46:55,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:46:55,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264457083] [2021-11-22 14:46:55,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264457083] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:46:55,013 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:46:55,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 14:46:55,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426001239] [2021-11-22 14:46:55,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:46:55,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:46:55,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:46:55,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:46:55,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:46:55,019 INFO L87 Difference]: Start difference. First operand 2481 states and 3386 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) [2021-11-22 14:46:55,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:46:55,153 INFO L93 Difference]: Finished difference Result 2481 states and 3386 transitions. [2021-11-22 14:46:55,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:46:55,154 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 [2021-11-22 14:46:55,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:46:55,171 INFO L225 Difference]: With dead ends: 2481 [2021-11-22 14:46:55,172 INFO L226 Difference]: Without dead ends: 2479 [2021-11-22 14:46:55,175 INFO L932 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 [2021-11-22 14:46:55,176 INFO L933 BasicCegarLoop]: 873 mSDtfsCounter, 848 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 848 SdHoareTripleChecker+Valid, 873 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:46:55,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [848 Valid, 873 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:46:55,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2479 states. [2021-11-22 14:46:55,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2479 to 2479. [2021-11-22 14:46:55,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2479 states, 2409 states have (on average 1.3590701535907015) internal successors, (3274), 2418 states have internal predecessors, (3274), 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) [2021-11-22 14:46:55,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2479 states to 2479 states and 3384 transitions. [2021-11-22 14:46:55,397 INFO L78 Accepts]: Start accepts. Automaton has 2479 states and 3384 transitions. Word has length 28 [2021-11-22 14:46:55,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:46:55,398 INFO L470 AbstractCegarLoop]: Abstraction has 2479 states and 3384 transitions. [2021-11-22 14:46:55,398 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) [2021-11-22 14:46:55,398 INFO L276 IsEmpty]: Start isEmpty. Operand 2479 states and 3384 transitions. [2021-11-22 14:46:55,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-22 14:46:55,401 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:46:55,401 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:46:55,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-22 14:46:55,401 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)] === [2021-11-22 14:46:55,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:46:55,402 INFO L85 PathProgramCache]: Analyzing trace with hash -839025008, now seen corresponding path program 1 times [2021-11-22 14:46:55,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:46:55,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274484713] [2021-11-22 14:46:55,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:46:55,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:46:55,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:46:55,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:46:55,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:46:55,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274484713] [2021-11-22 14:46:55,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274484713] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:46:55,542 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:46:55,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 14:46:55,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420233475] [2021-11-22 14:46:55,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:46:55,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:46:55,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:46:55,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:46:55,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:46:55,544 INFO L87 Difference]: Start difference. First operand 2479 states and 3384 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:46:55,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:46:55,671 INFO L93 Difference]: Finished difference Result 2479 states and 3384 transitions. [2021-11-22 14:46:55,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:46:55,671 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-22 14:46:55,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:46:55,688 INFO L225 Difference]: With dead ends: 2479 [2021-11-22 14:46:55,688 INFO L226 Difference]: Without dead ends: 2468 [2021-11-22 14:46:55,690 INFO L932 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 [2021-11-22 14:46:55,692 INFO L933 BasicCegarLoop]: 872 mSDtfsCounter, 845 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 845 SdHoareTripleChecker+Valid, 872 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:46:55,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [845 Valid, 872 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:46:55,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2468 states. [2021-11-22 14:46:55,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2468 to 2468. [2021-11-22 14:46:55,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2468 states, 2399 states have (on average 1.3588995414756149) internal successors, (3260), 2407 states have internal predecessors, (3260), 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) [2021-11-22 14:46:55,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2468 states to 2468 states and 3370 transitions. [2021-11-22 14:46:55,854 INFO L78 Accepts]: Start accepts. Automaton has 2468 states and 3370 transitions. Word has length 29 [2021-11-22 14:46:55,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:46:55,855 INFO L470 AbstractCegarLoop]: Abstraction has 2468 states and 3370 transitions. [2021-11-22 14:46:55,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:46:55,856 INFO L276 IsEmpty]: Start isEmpty. Operand 2468 states and 3370 transitions. [2021-11-22 14:46:55,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-22 14:46:55,860 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:46:55,861 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:46:55,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-22 14:46:55,861 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)] === [2021-11-22 14:46:55,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:46:55,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1463898686, now seen corresponding path program 1 times [2021-11-22 14:46:55,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:46:55,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562321644] [2021-11-22 14:46:55,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:46:55,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:46:55,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:46:55,965 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:46:55,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:46:55,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562321644] [2021-11-22 14:46:55,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562321644] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:46:55,966 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:46:55,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 14:46:55,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959451494] [2021-11-22 14:46:55,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:46:55,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:46:55,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:46:55,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:46:55,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:46:55,969 INFO L87 Difference]: Start difference. First operand 2468 states and 3370 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:46:56,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:46:56,196 INFO L93 Difference]: Finished difference Result 5436 states and 7375 transitions. [2021-11-22 14:46:56,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:46:56,197 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-22 14:46:56,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:46:56,216 INFO L225 Difference]: With dead ends: 5436 [2021-11-22 14:46:56,216 INFO L226 Difference]: Without dead ends: 2981 [2021-11-22 14:46:56,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:46:56,224 INFO L933 BasicCegarLoop]: 876 mSDtfsCounter, 184 mSDsluCounter, 835 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 1711 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:46:56,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 1711 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:46:56,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2981 states. [2021-11-22 14:46:56,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2981 to 2974. [2021-11-22 14:46:56,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2974 states, 2905 states have (on average 1.342512908777969) internal successors, (3900), 2913 states have internal predecessors, (3900), 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) [2021-11-22 14:46:56,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2974 states to 2974 states and 4010 transitions. [2021-11-22 14:46:56,443 INFO L78 Accepts]: Start accepts. Automaton has 2974 states and 4010 transitions. Word has length 53 [2021-11-22 14:46:56,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:46:56,444 INFO L470 AbstractCegarLoop]: Abstraction has 2974 states and 4010 transitions. [2021-11-22 14:46:56,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:46:56,444 INFO L276 IsEmpty]: Start isEmpty. Operand 2974 states and 4010 transitions. [2021-11-22 14:46:56,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-22 14:46:56,449 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:46:56,450 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:46:56,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-22 14:46:56,450 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)] === [2021-11-22 14:46:56,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:46:56,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1305537209, now seen corresponding path program 1 times [2021-11-22 14:46:56,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:46:56,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77285453] [2021-11-22 14:46:56,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:46:56,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:46:56,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:46:56,609 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:46:56,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:46:56,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77285453] [2021-11-22 14:46:56,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77285453] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:46:56,610 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:46:56,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 14:46:56,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890006678] [2021-11-22 14:46:56,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:46:56,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:46:56,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:46:56,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:46:56,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:46:56,612 INFO L87 Difference]: Start difference. First operand 2974 states and 4010 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) [2021-11-22 14:46:57,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:46:57,216 INFO L93 Difference]: Finished difference Result 6496 states and 8743 transitions. [2021-11-22 14:46:57,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:46:57,216 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 [2021-11-22 14:46:57,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:46:57,239 INFO L225 Difference]: With dead ends: 6496 [2021-11-22 14:46:57,239 INFO L226 Difference]: Without dead ends: 3535 [2021-11-22 14:46:57,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:46:57,247 INFO L933 BasicCegarLoop]: 1035 mSDtfsCounter, 189 mSDsluCounter, 839 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 1874 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-22 14:46:57,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 1874 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-22 14:46:57,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3535 states. [2021-11-22 14:46:57,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3535 to 3528. [2021-11-22 14:46:57,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3459 states have (on average 1.3321769297484822) internal successors, (4608), 3467 states have internal predecessors, (4608), 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) [2021-11-22 14:46:57,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 4718 transitions. [2021-11-22 14:46:57,449 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 4718 transitions. Word has length 65 [2021-11-22 14:46:57,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:46:57,449 INFO L470 AbstractCegarLoop]: Abstraction has 3528 states and 4718 transitions. [2021-11-22 14:46:57,449 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) [2021-11-22 14:46:57,450 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 4718 transitions. [2021-11-22 14:46:57,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-22 14:46:57,453 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:46:57,453 INFO L514 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, 1] [2021-11-22 14:46:57,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-22 14:46:57,453 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)] === [2021-11-22 14:46:57,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:46:57,454 INFO L85 PathProgramCache]: Analyzing trace with hash 137556111, now seen corresponding path program 1 times [2021-11-22 14:46:57,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:46:57,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351830987] [2021-11-22 14:46:57,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:46:57,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:46:57,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:46:57,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:46:57,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:46:57,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351830987] [2021-11-22 14:46:57,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351830987] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:46:57,546 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:46:57,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 14:46:57,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409426378] [2021-11-22 14:46:57,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:46:57,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:46:57,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:46:57,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:46:57,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:46:57,549 INFO L87 Difference]: Start difference. First operand 3528 states and 4718 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:46:57,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:46:57,885 INFO L93 Difference]: Finished difference Result 9210 states and 12458 transitions. [2021-11-22 14:46:57,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:46:57,886 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-22 14:46:57,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:46:57,927 INFO L225 Difference]: With dead ends: 9210 [2021-11-22 14:46:57,927 INFO L226 Difference]: Without dead ends: 5695 [2021-11-22 14:46:57,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:46:57,938 INFO L933 BasicCegarLoop]: 1541 mSDtfsCounter, 709 mSDsluCounter, 841 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 709 SdHoareTripleChecker+Valid, 2382 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:46:57,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [709 Valid, 2382 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:46:57,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5695 states. [2021-11-22 14:46:58,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5695 to 5678. [2021-11-22 14:46:58,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5678 states, 5541 states have (on average 1.3548096011550261) internal successors, (7507), 5557 states have internal predecessors, (7507), 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) [2021-11-22 14:46:58,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5678 states to 5678 states and 7727 transitions. [2021-11-22 14:46:58,314 INFO L78 Accepts]: Start accepts. Automaton has 5678 states and 7727 transitions. Word has length 66 [2021-11-22 14:46:58,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:46:58,315 INFO L470 AbstractCegarLoop]: Abstraction has 5678 states and 7727 transitions. [2021-11-22 14:46:58,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:46:58,316 INFO L276 IsEmpty]: Start isEmpty. Operand 5678 states and 7727 transitions. [2021-11-22 14:46:58,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-22 14:46:58,322 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:46:58,322 INFO L514 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, 1, 1, 1] [2021-11-22 14:46:58,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-22 14:46:58,322 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)] === [2021-11-22 14:46:58,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:46:58,323 INFO L85 PathProgramCache]: Analyzing trace with hash 665024439, now seen corresponding path program 1 times [2021-11-22 14:46:58,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:46:58,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772130522] [2021-11-22 14:46:58,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:46:58,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:46:58,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:46:58,425 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-22 14:46:58,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:46:58,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772130522] [2021-11-22 14:46:58,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772130522] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:46:58,426 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:46:58,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 14:46:58,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948410211] [2021-11-22 14:46:58,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:46:58,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:46:58,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:46:58,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:46:58,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:46:58,429 INFO L87 Difference]: Start difference. First operand 5678 states and 7727 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:46:59,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:46:59,318 INFO L93 Difference]: Finished difference Result 13874 states and 19028 transitions. [2021-11-22 14:46:59,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:46:59,319 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-22 14:46:59,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:46:59,383 INFO L225 Difference]: With dead ends: 13874 [2021-11-22 14:46:59,383 INFO L226 Difference]: Without dead ends: 8209 [2021-11-22 14:46:59,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:46:59,398 INFO L933 BasicCegarLoop]: 1060 mSDtfsCounter, 668 mSDsluCounter, 695 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 668 SdHoareTripleChecker+Valid, 1755 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-22 14:46:59,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [668 Valid, 1755 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-22 14:46:59,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8209 states. [2021-11-22 14:46:59,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8209 to 8202. [2021-11-22 14:46:59,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8202 states, 7953 states have (on average 1.368288696089526) internal successors, (10882), 7985 states have internal predecessors, (10882), 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) [2021-11-22 14:46:59,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8202 states to 8202 states and 11262 transitions. [2021-11-22 14:46:59,812 INFO L78 Accepts]: Start accepts. Automaton has 8202 states and 11262 transitions. Word has length 77 [2021-11-22 14:46:59,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:46:59,812 INFO L470 AbstractCegarLoop]: Abstraction has 8202 states and 11262 transitions. [2021-11-22 14:46:59,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:46:59,813 INFO L276 IsEmpty]: Start isEmpty. Operand 8202 states and 11262 transitions. [2021-11-22 14:46:59,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-22 14:46:59,819 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:46:59,819 INFO L514 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, 1] [2021-11-22 14:46:59,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-22 14:46:59,820 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)] === [2021-11-22 14:46:59,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:46:59,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1258018362, now seen corresponding path program 1 times [2021-11-22 14:46:59,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:46:59,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040943833] [2021-11-22 14:46:59,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:46:59,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:46:59,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:47:00,007 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 14:47:00,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:47:00,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040943833] [2021-11-22 14:47:00,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040943833] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:47:00,008 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:47:00,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 14:47:00,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618981657] [2021-11-22 14:47:00,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:47:00,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:47:00,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:47:00,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:47:00,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:47:00,010 INFO L87 Difference]: Start difference. First operand 8202 states and 11262 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:47:00,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:47:00,406 INFO L93 Difference]: Finished difference Result 16423 states and 22557 transitions. [2021-11-22 14:47:00,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:47:00,407 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-22 14:47:00,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:47:00,440 INFO L225 Difference]: With dead ends: 16423 [2021-11-22 14:47:00,441 INFO L226 Difference]: Without dead ends: 8234 [2021-11-22 14:47:00,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:47:00,462 INFO L933 BasicCegarLoop]: 866 mSDtfsCounter, 1 mSDsluCounter, 863 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1729 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:47:00,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 1729 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:47:00,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8234 states. [2021-11-22 14:47:00,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8234 to 8218. [2021-11-22 14:47:00,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8218 states, 7969 states have (on average 1.3675492533567575) internal successors, (10898), 8001 states have internal predecessors, (10898), 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) [2021-11-22 14:47:00,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8218 states to 8218 states and 11278 transitions. [2021-11-22 14:47:00,930 INFO L78 Accepts]: Start accepts. Automaton has 8218 states and 11278 transitions. Word has length 78 [2021-11-22 14:47:00,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:47:00,932 INFO L470 AbstractCegarLoop]: Abstraction has 8218 states and 11278 transitions. [2021-11-22 14:47:00,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:47:00,932 INFO L276 IsEmpty]: Start isEmpty. Operand 8218 states and 11278 transitions. [2021-11-22 14:47:00,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-22 14:47:00,943 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:47:00,943 INFO L514 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, 1, 1, 1] [2021-11-22 14:47:00,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-22 14:47:00,944 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)] === [2021-11-22 14:47:00,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:47:00,945 INFO L85 PathProgramCache]: Analyzing trace with hash -953900990, now seen corresponding path program 1 times [2021-11-22 14:47:00,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:47:00,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616418700] [2021-11-22 14:47:00,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:47:00,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:47:01,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:47:01,086 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 14:47:01,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:47:01,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616418700] [2021-11-22 14:47:01,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616418700] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:47:01,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415949643] [2021-11-22 14:47:01,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:47:01,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:47:01,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:47:01,089 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:47:01,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-22 14:47:01,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:47:01,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 1360 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-22 14:47:01,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:47:01,864 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 14:47:01,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:47:01,999 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 14:47:02,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415949643] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:47:02,000 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:47:02,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-22 14:47:02,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155081828] [2021-11-22 14:47:02,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:47:02,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-22 14:47:02,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:47:02,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-22 14:47:02,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-22 14:47:02,003 INFO L87 Difference]: Start difference. First operand 8218 states and 11278 transitions. Second operand has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 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) [2021-11-22 14:47:02,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:47:02,378 INFO L93 Difference]: Finished difference Result 16519 states and 22685 transitions. [2021-11-22 14:47:02,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 14:47:02,378 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 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 80 [2021-11-22 14:47:02,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:47:02,409 INFO L225 Difference]: With dead ends: 16519 [2021-11-22 14:47:02,409 INFO L226 Difference]: Without dead ends: 8314 [2021-11-22 14:47:02,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-22 14:47:02,433 INFO L933 BasicCegarLoop]: 866 mSDtfsCounter, 4 mSDsluCounter, 1726 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 2592 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:47:02,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 2592 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:47:02,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8314 states. [2021-11-22 14:47:02,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8314 to 8314. [2021-11-22 14:47:02,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8314 states, 8065 states have (on average 1.363174209547427) internal successors, (10994), 8097 states have internal predecessors, (10994), 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) [2021-11-22 14:47:02,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8314 states to 8314 states and 11374 transitions. [2021-11-22 14:47:02,887 INFO L78 Accepts]: Start accepts. Automaton has 8314 states and 11374 transitions. Word has length 80 [2021-11-22 14:47:02,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:47:02,887 INFO L470 AbstractCegarLoop]: Abstraction has 8314 states and 11374 transitions. [2021-11-22 14:47:02,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 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) [2021-11-22 14:47:02,888 INFO L276 IsEmpty]: Start isEmpty. Operand 8314 states and 11374 transitions. [2021-11-22 14:47:02,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-22 14:47:02,895 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:47:02,895 INFO L514 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, 1, 1, 1] [2021-11-22 14:47:02,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-22 14:47:03,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-22 14:47:03,109 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)] === [2021-11-22 14:47:03,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:47:03,109 INFO L85 PathProgramCache]: Analyzing trace with hash 331278774, now seen corresponding path program 2 times [2021-11-22 14:47:03,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:47:03,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105137158] [2021-11-22 14:47:03,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:47:03,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:47:03,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:47:03,257 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-22 14:47:03,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:47:03,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105137158] [2021-11-22 14:47:03,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105137158] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:47:03,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766204308] [2021-11-22 14:47:03,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 14:47:03,258 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:47:03,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:47:03,259 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:47:03,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-22 14:47:04,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 14:47:04,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:47:04,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 1378 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-22 14:47:04,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:47:04,457 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 14:47:04,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:47:04,675 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 14:47:04,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766204308] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:47:04,675 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:47:04,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2021-11-22 14:47:04,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406502868] [2021-11-22 14:47:04,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:47:04,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-22 14:47:04,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:47:04,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-22 14:47:04,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-11-22 14:47:04,677 INFO L87 Difference]: Start difference. First operand 8314 states and 11374 transitions. Second operand has 14 states, 14 states have (on average 11.571428571428571) internal successors, (162), 14 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:47:06,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:47:06,683 INFO L93 Difference]: Finished difference Result 26397 states and 36087 transitions. [2021-11-22 14:47:06,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-22 14:47:06,684 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 11.571428571428571) internal successors, (162), 14 states have internal predecessors, (162), 0 states have call successors, (0), 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 86 [2021-11-22 14:47:06,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:47:06,779 INFO L225 Difference]: With dead ends: 26397 [2021-11-22 14:47:06,783 INFO L226 Difference]: Without dead ends: 18096 [2021-11-22 14:47:06,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=330, Invalid=792, Unknown=0, NotChecked=0, Total=1122 [2021-11-22 14:47:06,823 INFO L933 BasicCegarLoop]: 1065 mSDtfsCounter, 1034 mSDsluCounter, 6984 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1034 SdHoareTripleChecker+Valid, 8049 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-22 14:47:06,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1034 Valid, 8049 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-22 14:47:06,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18096 states. [2021-11-22 14:47:07,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18096 to 17654. [2021-11-22 14:47:07,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17654 states, 17157 states have (on average 1.35437430786268) internal successors, (23237), 17221 states have internal predecessors, (23237), 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) [2021-11-22 14:47:07,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17654 states to 17654 states and 23997 transitions. [2021-11-22 14:47:07,764 INFO L78 Accepts]: Start accepts. Automaton has 17654 states and 23997 transitions. Word has length 86 [2021-11-22 14:47:07,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:47:07,764 INFO L470 AbstractCegarLoop]: Abstraction has 17654 states and 23997 transitions. [2021-11-22 14:47:07,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.571428571428571) internal successors, (162), 14 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:47:07,765 INFO L276 IsEmpty]: Start isEmpty. Operand 17654 states and 23997 transitions. [2021-11-22 14:47:07,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-22 14:47:07,782 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:47:07,782 INFO L514 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, 1] [2021-11-22 14:47:07,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-22 14:47:07,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:47:07,997 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)] === [2021-11-22 14:47:07,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:47:07,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1467540504, now seen corresponding path program 1 times [2021-11-22 14:47:07,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:47:07,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602249895] [2021-11-22 14:47:07,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:47:07,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:47:08,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:47:08,220 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 21 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-22 14:47:08,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:47:08,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602249895] [2021-11-22 14:47:08,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602249895] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:47:08,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037360941] [2021-11-22 14:47:08,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:47:08,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:47:08,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:47:08,223 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:47:08,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-22 14:47:08,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:47:08,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 1395 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-22 14:47:08,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:47:09,078 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-22 14:47:09,078 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 14:47:09,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037360941] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:47:09,078 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-22 14:47:09,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-11-22 14:47:09,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920946733] [2021-11-22 14:47:09,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:47:09,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:47:09,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:47:09,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:47:09,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-11-22 14:47:09,081 INFO L87 Difference]: Start difference. First operand 17654 states and 23997 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:47:09,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:47:09,981 INFO L93 Difference]: Finished difference Result 26885 states and 36534 transitions. [2021-11-22 14:47:09,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:47:09,982 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-11-22 14:47:09,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:47:10,021 INFO L225 Difference]: With dead ends: 26885 [2021-11-22 14:47:10,022 INFO L226 Difference]: Without dead ends: 9491 [2021-11-22 14:47:10,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-11-22 14:47:10,066 INFO L933 BasicCegarLoop]: 1016 mSDtfsCounter, 780 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 780 SdHoareTripleChecker+Valid, 1194 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-22 14:47:10,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [780 Valid, 1194 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-22 14:47:10,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9491 states. [2021-11-22 14:47:10,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9491 to 9462. [2021-11-22 14:47:10,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9462 states, 9213 states have (on average 1.3413654618473896) internal successors, (12358), 9245 states have internal predecessors, (12358), 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) [2021-11-22 14:47:10,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9462 states to 9462 states and 12738 transitions. [2021-11-22 14:47:10,670 INFO L78 Accepts]: Start accepts. Automaton has 9462 states and 12738 transitions. Word has length 95 [2021-11-22 14:47:10,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:47:10,671 INFO L470 AbstractCegarLoop]: Abstraction has 9462 states and 12738 transitions. [2021-11-22 14:47:10,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:47:10,671 INFO L276 IsEmpty]: Start isEmpty. Operand 9462 states and 12738 transitions. [2021-11-22 14:47:10,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-22 14:47:10,687 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:47:10,687 INFO L514 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] [2021-11-22 14:47:10,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-22 14:47:10,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:47:10,913 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)] === [2021-11-22 14:47:10,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:47:10,913 INFO L85 PathProgramCache]: Analyzing trace with hash 652940448, now seen corresponding path program 1 times [2021-11-22 14:47:10,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:47:10,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144481085] [2021-11-22 14:47:10,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:47:10,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:47:10,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:47:11,190 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-22 14:47:11,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:47:11,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144481085] [2021-11-22 14:47:11,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144481085] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:47:11,191 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:47:11,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 14:47:11,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328840999] [2021-11-22 14:47:11,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:47:11,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 14:47:11,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:47:11,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 14:47:11,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-22 14:47:11,193 INFO L87 Difference]: Start difference. First operand 9462 states and 12738 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) [2021-11-22 14:47:13,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:47:13,838 INFO L93 Difference]: Finished difference Result 30291 states and 40579 transitions. [2021-11-22 14:47:13,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 14:47:13,840 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 98 [2021-11-22 14:47:13,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:47:13,909 INFO L225 Difference]: With dead ends: 30291 [2021-11-22 14:47:13,910 INFO L226 Difference]: Without dead ends: 20842 [2021-11-22 14:47:13,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-22 14:47:13,930 INFO L933 BasicCegarLoop]: 1468 mSDtfsCounter, 2035 mSDsluCounter, 3432 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2038 SdHoareTripleChecker+Valid, 4900 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-22 14:47:13,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2038 Valid, 4900 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-22 14:47:13,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20842 states. [2021-11-22 14:47:14,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20842 to 9534. [2021-11-22 14:47:14,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9534 states, 9285 states have (on average 1.3387183629509962) internal successors, (12430), 9317 states have internal predecessors, (12430), 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) [2021-11-22 14:47:14,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9534 states to 9534 states and 12810 transitions. [2021-11-22 14:47:14,629 INFO L78 Accepts]: Start accepts. Automaton has 9534 states and 12810 transitions. Word has length 98 [2021-11-22 14:47:14,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:47:14,630 INFO L470 AbstractCegarLoop]: Abstraction has 9534 states and 12810 transitions. [2021-11-22 14:47:14,630 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) [2021-11-22 14:47:14,630 INFO L276 IsEmpty]: Start isEmpty. Operand 9534 states and 12810 transitions. [2021-11-22 14:47:14,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-22 14:47:14,643 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:47:14,644 INFO L514 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] [2021-11-22 14:47:14,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-22 14:47:14,644 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)] === [2021-11-22 14:47:14,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:47:14,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1437351172, now seen corresponding path program 1 times [2021-11-22 14:47:14,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:47:14,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010870574] [2021-11-22 14:47:14,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:47:14,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:47:14,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:47:14,827 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-22 14:47:14,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:47:14,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010870574] [2021-11-22 14:47:14,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010870574] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:47:14,828 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:47:14,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 14:47:14,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783155941] [2021-11-22 14:47:14,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:47:14,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 14:47:14,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:47:14,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 14:47:14,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 14:47:14,831 INFO L87 Difference]: Start difference. First operand 9534 states and 12810 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:47:15,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:47:15,573 INFO L93 Difference]: Finished difference Result 23384 states and 31384 transitions. [2021-11-22 14:47:15,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 14:47:15,573 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-11-22 14:47:15,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:47:15,622 INFO L225 Difference]: With dead ends: 23384 [2021-11-22 14:47:15,622 INFO L226 Difference]: Without dead ends: 13815 [2021-11-22 14:47:15,643 INFO L932 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 [2021-11-22 14:47:15,644 INFO L933 BasicCegarLoop]: 1141 mSDtfsCounter, 452 mSDsluCounter, 1970 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 3111 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:47:15,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [455 Valid, 3111 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:47:15,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13815 states. [2021-11-22 14:47:16,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13815 to 9534. [2021-11-22 14:47:16,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9534 states, 9285 states have (on average 1.336133548734518) internal successors, (12406), 9317 states have internal predecessors, (12406), 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) [2021-11-22 14:47:16,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9534 states to 9534 states and 12786 transitions. [2021-11-22 14:47:16,446 INFO L78 Accepts]: Start accepts. Automaton has 9534 states and 12786 transitions. Word has length 100 [2021-11-22 14:47:16,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:47:16,446 INFO L470 AbstractCegarLoop]: Abstraction has 9534 states and 12786 transitions. [2021-11-22 14:47:16,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:47:16,447 INFO L276 IsEmpty]: Start isEmpty. Operand 9534 states and 12786 transitions. [2021-11-22 14:47:16,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-22 14:47:16,463 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:47:16,463 INFO L514 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] [2021-11-22 14:47:16,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-22 14:47:16,463 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)] === [2021-11-22 14:47:16,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:47:16,464 INFO L85 PathProgramCache]: Analyzing trace with hash 290583404, now seen corresponding path program 1 times [2021-11-22 14:47:16,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:47:16,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9795982] [2021-11-22 14:47:16,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:47:16,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:47:16,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:47:16,622 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 32 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-22 14:47:16,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:47:16,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9795982] [2021-11-22 14:47:16,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9795982] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:47:16,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789425436] [2021-11-22 14:47:16,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:47:16,624 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:47:16,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:47:16,625 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:47:16,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-22 14:47:17,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:47:17,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 1358 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-22 14:47:17,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:47:17,259 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-22 14:47:17,259 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 14:47:17,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789425436] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:47:17,260 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-22 14:47:17,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-22 14:47:17,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85910485] [2021-11-22 14:47:17,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:47:17,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:47:17,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:47:17,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:47:17,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-22 14:47:17,262 INFO L87 Difference]: Start difference. First operand 9534 states and 12786 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 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) [2021-11-22 14:47:18,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:47:18,516 INFO L93 Difference]: Finished difference Result 17234 states and 23312 transitions. [2021-11-22 14:47:18,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:47:18,517 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 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 101 [2021-11-22 14:47:18,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:47:18,553 INFO L225 Difference]: With dead ends: 17234 [2021-11-22 14:47:18,554 INFO L226 Difference]: Without dead ends: 8992 [2021-11-22 14:47:18,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-22 14:47:18,573 INFO L933 BasicCegarLoop]: 1357 mSDtfsCounter, 655 mSDsluCounter, 690 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 655 SdHoareTripleChecker+Valid, 2047 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-22 14:47:18,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [655 Valid, 2047 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-22 14:47:18,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8992 states. [2021-11-22 14:47:19,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8992 to 8985. [2021-11-22 14:47:19,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8985 states, 8736 states have (on average 1.340315934065934) internal successors, (11709), 8768 states have internal predecessors, (11709), 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) [2021-11-22 14:47:19,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8985 states to 8985 states and 12089 transitions. [2021-11-22 14:47:19,269 INFO L78 Accepts]: Start accepts. Automaton has 8985 states and 12089 transitions. Word has length 101 [2021-11-22 14:47:19,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:47:19,270 INFO L470 AbstractCegarLoop]: Abstraction has 8985 states and 12089 transitions. [2021-11-22 14:47:19,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 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) [2021-11-22 14:47:19,270 INFO L276 IsEmpty]: Start isEmpty. Operand 8985 states and 12089 transitions. [2021-11-22 14:47:19,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-22 14:47:19,285 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:47:19,285 INFO L514 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, 1, 1, 1, 1] [2021-11-22 14:47:19,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-22 14:47:19,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-22 14:47:19,501 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)] === [2021-11-22 14:47:19,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:47:19,501 INFO L85 PathProgramCache]: Analyzing trace with hash 86169052, now seen corresponding path program 1 times [2021-11-22 14:47:19,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:47:19,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29484839] [2021-11-22 14:47:19,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:47:19,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:47:19,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:47:19,736 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 14:47:19,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:47:19,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29484839] [2021-11-22 14:47:19,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29484839] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:47:19,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413178682] [2021-11-22 14:47:19,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:47:19,737 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:47:19,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:47:19,738 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:47:19,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-22 14:47:20,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:47:20,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 1412 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-22 14:47:20,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:47:20,453 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-22 14:47:20,453 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 14:47:20,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413178682] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:47:20,453 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-22 14:47:20,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-22 14:47:20,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108257151] [2021-11-22 14:47:20,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:47:20,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:47:20,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:47:20,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:47:20,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-22 14:47:20,455 INFO L87 Difference]: Start difference. First operand 8985 states and 12089 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:47:21,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:47:21,118 INFO L93 Difference]: Finished difference Result 16539 states and 22487 transitions. [2021-11-22 14:47:21,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:47:21,119 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 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 [2021-11-22 14:47:21,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:47:21,155 INFO L225 Difference]: With dead ends: 16539 [2021-11-22 14:47:21,156 INFO L226 Difference]: Without dead ends: 12278 [2021-11-22 14:47:21,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-22 14:47:21,171 INFO L933 BasicCegarLoop]: 872 mSDtfsCounter, 778 mSDsluCounter, 718 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 778 SdHoareTripleChecker+Valid, 1590 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:47:21,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [778 Valid, 1590 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:47:21,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12278 states. [2021-11-22 14:47:21,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12278 to 12269. [2021-11-22 14:47:21,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12269 states, 11896 states have (on average 1.3567585743106927) internal successors, (16140), 11944 states have internal predecessors, (16140), 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) [2021-11-22 14:47:21,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12269 states to 12269 states and 16710 transitions. [2021-11-22 14:47:21,806 INFO L78 Accepts]: Start accepts. Automaton has 12269 states and 16710 transitions. Word has length 101 [2021-11-22 14:47:21,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:47:21,806 INFO L470 AbstractCegarLoop]: Abstraction has 12269 states and 16710 transitions. [2021-11-22 14:47:21,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:47:21,807 INFO L276 IsEmpty]: Start isEmpty. Operand 12269 states and 16710 transitions. [2021-11-22 14:47:21,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-22 14:47:21,821 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:47:21,821 INFO L514 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] [2021-11-22 14:47:21,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-22 14:47:22,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-22 14:47:22,037 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)] === [2021-11-22 14:47:22,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:47:22,037 INFO L85 PathProgramCache]: Analyzing trace with hash 431132014, now seen corresponding path program 1 times [2021-11-22 14:47:22,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:47:22,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134555614] [2021-11-22 14:47:22,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:47:22,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:47:22,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:47:22,165 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-22 14:47:22,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:47:22,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134555614] [2021-11-22 14:47:22,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134555614] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:47:22,166 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:47:22,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 14:47:22,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586377176] [2021-11-22 14:47:22,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:47:22,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 14:47:22,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:47:22,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 14:47:22,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 14:47:22,169 INFO L87 Difference]: Start difference. First operand 12269 states and 16710 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 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) [2021-11-22 14:47:23,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:47:23,735 INFO L93 Difference]: Finished difference Result 41033 states and 55278 transitions. [2021-11-22 14:47:23,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 14:47:23,736 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 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 [2021-11-22 14:47:23,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:47:23,796 INFO L225 Difference]: With dead ends: 41033 [2021-11-22 14:47:23,797 INFO L226 Difference]: Without dead ends: 28777 [2021-11-22 14:47:23,833 INFO L932 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 [2021-11-22 14:47:23,833 INFO L933 BasicCegarLoop]: 1423 mSDtfsCounter, 1511 mSDsluCounter, 2299 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1517 SdHoareTripleChecker+Valid, 3722 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 14:47:23,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1517 Valid, 3722 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 14:47:23,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28777 states. [2021-11-22 14:47:24,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28777 to 12445. [2021-11-22 14:47:24,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12445 states, 12072 states have (on average 1.3552021206096754) internal successors, (16360), 12120 states have internal predecessors, (16360), 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) [2021-11-22 14:47:24,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12445 states to 12445 states and 16930 transitions. [2021-11-22 14:47:24,826 INFO L78 Accepts]: Start accepts. Automaton has 12445 states and 16930 transitions. Word has length 101 [2021-11-22 14:47:24,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:47:24,826 INFO L470 AbstractCegarLoop]: Abstraction has 12445 states and 16930 transitions. [2021-11-22 14:47:24,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 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) [2021-11-22 14:47:24,827 INFO L276 IsEmpty]: Start isEmpty. Operand 12445 states and 16930 transitions. [2021-11-22 14:47:24,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-22 14:47:24,847 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:47:24,847 INFO L514 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] [2021-11-22 14:47:24,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-22 14:47:24,848 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)] === [2021-11-22 14:47:24,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:47:24,848 INFO L85 PathProgramCache]: Analyzing trace with hash 507742450, now seen corresponding path program 1 times [2021-11-22 14:47:24,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:47:24,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108425628] [2021-11-22 14:47:24,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:47:24,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:47:24,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:47:24,989 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-22 14:47:24,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:47:24,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108425628] [2021-11-22 14:47:24,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108425628] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:47:24,989 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:47:24,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 14:47:24,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091082920] [2021-11-22 14:47:24,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:47:24,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:47:24,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:47:24,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:47:24,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:47:24,992 INFO L87 Difference]: Start difference. First operand 12445 states and 16930 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 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) [2021-11-22 14:47:25,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:47:25,624 INFO L93 Difference]: Finished difference Result 24969 states and 34029 transitions. [2021-11-22 14:47:25,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:47:25,625 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 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 103 [2021-11-22 14:47:25,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:47:25,751 INFO L225 Difference]: With dead ends: 24969 [2021-11-22 14:47:25,751 INFO L226 Difference]: Without dead ends: 12537 [2021-11-22 14:47:25,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:47:25,769 INFO L933 BasicCegarLoop]: 859 mSDtfsCounter, 0 mSDsluCounter, 845 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1704 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:47:25,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1704 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:47:25,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12537 states. [2021-11-22 14:47:26,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12537 to 12537. [2021-11-22 14:47:26,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12537 states, 12164 states have (on average 1.3525156198618875) internal successors, (16452), 12212 states have internal predecessors, (16452), 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) [2021-11-22 14:47:26,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12537 states to 12537 states and 17022 transitions. [2021-11-22 14:47:26,577 INFO L78 Accepts]: Start accepts. Automaton has 12537 states and 17022 transitions. Word has length 103 [2021-11-22 14:47:26,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:47:26,578 INFO L470 AbstractCegarLoop]: Abstraction has 12537 states and 17022 transitions. [2021-11-22 14:47:26,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 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) [2021-11-22 14:47:26,578 INFO L276 IsEmpty]: Start isEmpty. Operand 12537 states and 17022 transitions. [2021-11-22 14:47:26,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-22 14:47:26,591 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:47:26,591 INFO L514 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, 1] [2021-11-22 14:47:26,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-22 14:47:26,592 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)] === [2021-11-22 14:47:26,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:47:26,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1031408284, now seen corresponding path program 1 times [2021-11-22 14:47:26,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:47:26,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964478261] [2021-11-22 14:47:26,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:47:26,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:47:26,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:47:26,796 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-22 14:47:26,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:47:26,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964478261] [2021-11-22 14:47:26,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964478261] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:47:26,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578551677] [2021-11-22 14:47:26,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:47:26,797 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:47:26,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:47:26,799 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:47:26,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-22 14:47:27,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:47:27,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 1379 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-22 14:47:27,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:47:27,528 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 [2021-11-22 14:47:27,688 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-22 14:47:27,688 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 14:47:27,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578551677] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:47:27,689 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-22 14:47:27,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-22 14:47:27,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702478720] [2021-11-22 14:47:27,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:47:27,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:47:27,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:47:27,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:47:27,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-22 14:47:27,691 INFO L87 Difference]: Start difference. First operand 12537 states and 17022 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:47:29,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:47:29,272 INFO L93 Difference]: Finished difference Result 25153 states and 34213 transitions. [2021-11-22 14:47:29,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:47:29,272 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 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 104 [2021-11-22 14:47:29,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:47:29,298 INFO L225 Difference]: With dead ends: 25153 [2021-11-22 14:47:29,299 INFO L226 Difference]: Without dead ends: 12629 [2021-11-22 14:47:29,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-22 14:47:29,320 INFO L933 BasicCegarLoop]: 859 mSDtfsCounter, 0 mSDsluCounter, 831 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1690 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-22 14:47:29,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1690 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-22 14:47:29,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12629 states. [2021-11-22 14:47:30,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12629 to 12629. [2021-11-22 14:47:30,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12629 states, 12256 states have (on average 1.349869451697128) internal successors, (16544), 12304 states have internal predecessors, (16544), 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) [2021-11-22 14:47:30,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12629 states to 12629 states and 17114 transitions. [2021-11-22 14:47:30,107 INFO L78 Accepts]: Start accepts. Automaton has 12629 states and 17114 transitions. Word has length 104 [2021-11-22 14:47:30,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:47:30,107 INFO L470 AbstractCegarLoop]: Abstraction has 12629 states and 17114 transitions. [2021-11-22 14:47:30,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:47:30,108 INFO L276 IsEmpty]: Start isEmpty. Operand 12629 states and 17114 transitions. [2021-11-22 14:47:30,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-22 14:47:30,121 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:47:30,121 INFO L514 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] [2021-11-22 14:47:30,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-22 14:47:30,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:47:30,349 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)] === [2021-11-22 14:47:30,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:47:30,349 INFO L85 PathProgramCache]: Analyzing trace with hash 951745668, now seen corresponding path program 1 times [2021-11-22 14:47:30,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:47:30,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906715252] [2021-11-22 14:47:30,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:47:30,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:47:30,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:47:30,599 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-22 14:47:30,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:47:30,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906715252] [2021-11-22 14:47:30,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906715252] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:47:30,600 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:47:30,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-22 14:47:30,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228633892] [2021-11-22 14:47:30,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:47:30,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 14:47:30,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:47:30,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 14:47:30,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-22 14:47:30,602 INFO L87 Difference]: Start difference. First operand 12629 states and 17114 transitions. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 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) [2021-11-22 14:47:33,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:47:33,454 INFO L93 Difference]: Finished difference Result 34276 states and 45915 transitions. [2021-11-22 14:47:33,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-22 14:47:33,467 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 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 104 [2021-11-22 14:47:33,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:47:33,511 INFO L225 Difference]: With dead ends: 34276 [2021-11-22 14:47:33,511 INFO L226 Difference]: Without dead ends: 21660 [2021-11-22 14:47:33,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-11-22 14:47:33,540 INFO L933 BasicCegarLoop]: 2607 mSDtfsCounter, 2391 mSDsluCounter, 7503 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2395 SdHoareTripleChecker+Valid, 10110 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:47:33,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2395 Valid, 10110 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-22 14:47:33,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21660 states. [2021-11-22 14:47:34,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21660 to 12629. [2021-11-22 14:47:34,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12629 states, 12256 states have (on average 1.3490535248041775) internal successors, (16534), 12304 states have internal predecessors, (16534), 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) [2021-11-22 14:47:34,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12629 states to 12629 states and 17104 transitions. [2021-11-22 14:47:34,491 INFO L78 Accepts]: Start accepts. Automaton has 12629 states and 17104 transitions. Word has length 104 [2021-11-22 14:47:34,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:47:34,492 INFO L470 AbstractCegarLoop]: Abstraction has 12629 states and 17104 transitions. [2021-11-22 14:47:34,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 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) [2021-11-22 14:47:34,492 INFO L276 IsEmpty]: Start isEmpty. Operand 12629 states and 17104 transitions. [2021-11-22 14:47:34,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-22 14:47:34,506 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:47:34,506 INFO L514 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, 1, 1] [2021-11-22 14:47:34,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-22 14:47:34,507 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)] === [2021-11-22 14:47:34,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:47:34,508 INFO L85 PathProgramCache]: Analyzing trace with hash -409627272, now seen corresponding path program 1 times [2021-11-22 14:47:34,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:47:34,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533283861] [2021-11-22 14:47:34,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:47:34,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:47:34,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:47:34,697 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-22 14:47:34,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:47:34,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533283861] [2021-11-22 14:47:34,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533283861] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:47:34,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751963850] [2021-11-22 14:47:34,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:47:34,699 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:47:34,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:47:34,700 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:47:34,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-22 14:47:35,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:47:35,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 1415 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-22 14:47:35,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:47:35,413 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-22 14:47:35,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:47:35,618 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-22 14:47:35,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751963850] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-22 14:47:35,619 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-22 14:47:35,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2021-11-22 14:47:35,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888925483] [2021-11-22 14:47:35,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:47:35,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 14:47:35,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:47:35,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 14:47:35,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-22 14:47:35,621 INFO L87 Difference]: Start difference. First operand 12629 states and 17104 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 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) [2021-11-22 14:47:37,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:47:37,824 INFO L93 Difference]: Finished difference Result 28239 states and 38022 transitions. [2021-11-22 14:47:37,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 14:47:37,826 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 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 105 [2021-11-22 14:47:37,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:47:37,853 INFO L225 Difference]: With dead ends: 28239 [2021-11-22 14:47:37,853 INFO L226 Difference]: Without dead ends: 15623 [2021-11-22 14:47:37,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 206 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-22 14:47:37,866 INFO L933 BasicCegarLoop]: 1019 mSDtfsCounter, 506 mSDsluCounter, 1015 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 2034 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-22 14:47:37,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [509 Valid, 2034 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-22 14:47:37,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15623 states. [2021-11-22 14:47:38,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15623 to 12721. [2021-11-22 14:47:38,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12721 states, 12348 states have (on average 1.34645286686103) internal successors, (16626), 12396 states have internal predecessors, (16626), 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) [2021-11-22 14:47:38,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12721 states to 12721 states and 17196 transitions. [2021-11-22 14:47:38,752 INFO L78 Accepts]: Start accepts. Automaton has 12721 states and 17196 transitions. Word has length 105 [2021-11-22 14:47:38,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:47:38,752 INFO L470 AbstractCegarLoop]: Abstraction has 12721 states and 17196 transitions. [2021-11-22 14:47:38,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 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) [2021-11-22 14:47:38,753 INFO L276 IsEmpty]: Start isEmpty. Operand 12721 states and 17196 transitions. [2021-11-22 14:47:38,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-22 14:47:38,763 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:47:38,764 INFO L514 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, 1, 1, 1] [2021-11-22 14:47:38,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-22 14:47:38,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-22 14:47:38,977 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)] === [2021-11-22 14:47:38,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:47:38,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1181094430, now seen corresponding path program 1 times [2021-11-22 14:47:38,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:47:38,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654752885] [2021-11-22 14:47:38,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:47:38,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:47:39,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:47:39,174 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-22 14:47:39,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:47:39,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654752885] [2021-11-22 14:47:39,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654752885] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:47:39,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364079961] [2021-11-22 14:47:39,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:47:39,175 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:47:39,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:47:39,177 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:47:39,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-22 14:47:39,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:47:39,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 1425 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-22 14:47:39,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:47:39,932 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-22 14:47:39,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:47:40,143 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-22 14:47:40,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364079961] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:47:40,144 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:47:40,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2021-11-22 14:47:40,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780130032] [2021-11-22 14:47:40,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:47:40,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-22 14:47:40,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:47:40,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-22 14:47:40,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-22 14:47:40,146 INFO L87 Difference]: Start difference. First operand 12721 states and 17196 transitions. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:47:43,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:47:43,251 INFO L93 Difference]: Finished difference Result 28747 states and 38770 transitions. [2021-11-22 14:47:43,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-22 14:47:43,252 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-11-22 14:47:43,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:47:43,285 INFO L225 Difference]: With dead ends: 28747 [2021-11-22 14:47:43,285 INFO L226 Difference]: Without dead ends: 16039 [2021-11-22 14:47:43,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-11-22 14:47:43,303 INFO L933 BasicCegarLoop]: 1041 mSDtfsCounter, 493 mSDsluCounter, 4633 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 5674 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-22 14:47:43,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [496 Valid, 5674 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-22 14:47:43,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16039 states. [2021-11-22 14:47:44,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16039 to 12997. [2021-11-22 14:47:44,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12997 states, 12624 states have (on average 1.3388783269961977) internal successors, (16902), 12672 states have internal predecessors, (16902), 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) [2021-11-22 14:47:44,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12997 states to 12997 states and 17472 transitions. [2021-11-22 14:47:44,417 INFO L78 Accepts]: Start accepts. Automaton has 12997 states and 17472 transitions. Word has length 106 [2021-11-22 14:47:44,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:47:44,417 INFO L470 AbstractCegarLoop]: Abstraction has 12997 states and 17472 transitions. [2021-11-22 14:47:44,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:47:44,417 INFO L276 IsEmpty]: Start isEmpty. Operand 12997 states and 17472 transitions. [2021-11-22 14:47:44,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-22 14:47:44,425 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:47:44,425 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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] [2021-11-22 14:47:44,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-22 14:47:44,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-22 14:47:44,641 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)] === [2021-11-22 14:47:44,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:47:44,641 INFO L85 PathProgramCache]: Analyzing trace with hash 246834228, now seen corresponding path program 2 times [2021-11-22 14:47:44,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:47:44,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316369234] [2021-11-22 14:47:44,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:47:44,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:47:44,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:47:44,898 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-22 14:47:44,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:47:44,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316369234] [2021-11-22 14:47:44,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316369234] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:47:44,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410236330] [2021-11-22 14:47:44,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 14:47:44,899 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:47:44,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:47:44,901 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:47:44,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-22 14:47:45,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 14:47:45,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:47:45,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 1443 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-22 14:47:45,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:47:45,980 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 [2021-11-22 14:47:46,151 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-22 14:47:46,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:47:46,405 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-22 14:47:46,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410236330] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:47:46,406 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:47:46,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 6] total 12 [2021-11-22 14:47:46,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224320100] [2021-11-22 14:47:46,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:47:46,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-22 14:47:46,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:47:46,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-22 14:47:46,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-22 14:47:46,408 INFO L87 Difference]: Start difference. First operand 12997 states and 17472 transitions. Second operand has 12 states, 12 states have (on average 8.916666666666666) internal successors, (107), 12 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:47:48,650 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 14:47:52,073 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 14:47:58,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:47:58,315 INFO L93 Difference]: Finished difference Result 29383 states and 39490 transitions. [2021-11-22 14:47:58,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-22 14:47:58,315 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.916666666666666) internal successors, (107), 12 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2021-11-22 14:47:58,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:47:58,345 INFO L225 Difference]: With dead ends: 29383 [2021-11-22 14:47:58,346 INFO L226 Difference]: Without dead ends: 16399 [2021-11-22 14:47:58,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-11-22 14:47:58,364 INFO L933 BasicCegarLoop]: 1049 mSDtfsCounter, 493 mSDsluCounter, 7495 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 89 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 8544 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.3s IncrementalHoareTripleChecker+Time [2021-11-22 14:47:58,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [496 Valid, 8544 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 507 Invalid, 1 Unknown, 0 Unchecked, 10.3s Time] [2021-11-22 14:47:58,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16399 states. [2021-11-22 14:47:59,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16399 to 13273. [2021-11-22 14:47:59,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13273 states, 12900 states have (on average 1.3316279069767443) internal successors, (17178), 12948 states have internal predecessors, (17178), 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) [2021-11-22 14:47:59,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13273 states to 13273 states and 17748 transitions. [2021-11-22 14:47:59,601 INFO L78 Accepts]: Start accepts. Automaton has 13273 states and 17748 transitions. Word has length 109 [2021-11-22 14:47:59,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:47:59,602 INFO L470 AbstractCegarLoop]: Abstraction has 13273 states and 17748 transitions. [2021-11-22 14:47:59,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.916666666666666) internal successors, (107), 12 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:47:59,602 INFO L276 IsEmpty]: Start isEmpty. Operand 13273 states and 17748 transitions. [2021-11-22 14:47:59,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-22 14:47:59,611 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:47:59,611 INFO L514 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] [2021-11-22 14:47:59,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-22 14:47:59,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:47:59,825 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)] === [2021-11-22 14:47:59,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:47:59,825 INFO L85 PathProgramCache]: Analyzing trace with hash 2132005664, now seen corresponding path program 3 times [2021-11-22 14:47:59,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:47:59,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155357932] [2021-11-22 14:47:59,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:47:59,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:48:00,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:48:00,338 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 30 proven. 10 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-22 14:48:00,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:48:00,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155357932] [2021-11-22 14:48:00,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155357932] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:48:00,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159579951] [2021-11-22 14:48:00,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 14:48:00,339 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:48:00,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:48:00,340 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:48:00,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-22 14:48:01,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-22 14:48:01,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:48:01,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 1196 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-22 14:48:01,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:48:01,676 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-22 14:48:01,677 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 14:48:01,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159579951] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:48:01,677 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-22 14:48:01,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7] total 14 [2021-11-22 14:48:01,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648209849] [2021-11-22 14:48:01,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:48:01,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-22 14:48:01,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:48:01,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-22 14:48:01,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-11-22 14:48:01,679 INFO L87 Difference]: Start difference. First operand 13273 states and 17748 transitions. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:48:12,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:48:12,098 INFO L93 Difference]: Finished difference Result 67549 states and 88029 transitions. [2021-11-22 14:48:12,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-11-22 14:48:12,099 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-11-22 14:48:12,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:48:12,200 INFO L225 Difference]: With dead ends: 67549 [2021-11-22 14:48:12,200 INFO L226 Difference]: Without dead ends: 56182 [2021-11-22 14:48:12,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1732 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=909, Invalid=4493, Unknown=0, NotChecked=0, Total=5402 [2021-11-22 14:48:12,224 INFO L933 BasicCegarLoop]: 4610 mSDtfsCounter, 6095 mSDsluCounter, 19459 mSDsCounter, 0 mSdLazyCounter, 1104 mSolverCounterSat, 284 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6096 SdHoareTripleChecker+Valid, 24069 SdHoareTripleChecker+Invalid, 1388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 284 IncrementalHoareTripleChecker+Valid, 1104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-22 14:48:12,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6096 Valid, 24069 Invalid, 1388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [284 Valid, 1104 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-22 14:48:12,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56182 states. [2021-11-22 14:48:14,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56182 to 13273. [2021-11-22 14:48:14,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13273 states, 12900 states have (on average 1.3311627906976744) internal successors, (17172), 12948 states have internal predecessors, (17172), 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) [2021-11-22 14:48:14,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13273 states to 13273 states and 17742 transitions. [2021-11-22 14:48:14,428 INFO L78 Accepts]: Start accepts. Automaton has 13273 states and 17742 transitions. Word has length 112 [2021-11-22 14:48:14,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:48:14,428 INFO L470 AbstractCegarLoop]: Abstraction has 13273 states and 17742 transitions. [2021-11-22 14:48:14,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:48:14,429 INFO L276 IsEmpty]: Start isEmpty. Operand 13273 states and 17742 transitions. [2021-11-22 14:48:14,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-22 14:48:14,435 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:48:14,435 INFO L514 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, 1, 1, 1, 1] [2021-11-22 14:48:14,472 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-11-22 14:48:14,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:48:14,661 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)] === [2021-11-22 14:48:14,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:48:14,661 INFO L85 PathProgramCache]: Analyzing trace with hash 454942333, now seen corresponding path program 1 times [2021-11-22 14:48:14,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:48:14,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775226008] [2021-11-22 14:48:14,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:48:14,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:48:14,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:48:15,047 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-22 14:48:15,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:48:15,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775226008] [2021-11-22 14:48:15,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775226008] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:48:15,047 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:48:15,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-22 14:48:15,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809501552] [2021-11-22 14:48:15,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:48:15,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-22 14:48:15,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:48:15,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-22 14:48:15,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-22 14:48:15,049 INFO L87 Difference]: Start difference. First operand 13273 states and 17742 transitions. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 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) [2021-11-22 14:48:18,998 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 14:48:31,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:48:31,310 INFO L93 Difference]: Finished difference Result 53523 states and 70943 transitions. [2021-11-22 14:48:31,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-22 14:48:31,311 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 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 114 [2021-11-22 14:48:31,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:48:31,391 INFO L225 Difference]: With dead ends: 53523 [2021-11-22 14:48:31,391 INFO L226 Difference]: Without dead ends: 40238 [2021-11-22 14:48:31,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2021-11-22 14:48:31,411 INFO L933 BasicCegarLoop]: 1787 mSDtfsCounter, 3251 mSDsluCounter, 5619 mSDsCounter, 0 mSdLazyCounter, 977 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3251 SdHoareTripleChecker+Valid, 7406 SdHoareTripleChecker+Invalid, 1033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2021-11-22 14:48:31,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3251 Valid, 7406 Invalid, 1033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 977 Invalid, 0 Unknown, 0 Unchecked, 9.8s Time] [2021-11-22 14:48:31,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40238 states. [2021-11-22 14:48:34,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40238 to 19925. [2021-11-22 14:48:34,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19925 states, 19366 states have (on average 1.3289269854383972) internal successors, (25736), 19438 states have internal predecessors, (25736), 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) [2021-11-22 14:48:34,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19925 states to 19925 states and 26534 transitions. [2021-11-22 14:48:34,191 INFO L78 Accepts]: Start accepts. Automaton has 19925 states and 26534 transitions. Word has length 114 [2021-11-22 14:48:34,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:48:34,192 INFO L470 AbstractCegarLoop]: Abstraction has 19925 states and 26534 transitions. [2021-11-22 14:48:34,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 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) [2021-11-22 14:48:34,192 INFO L276 IsEmpty]: Start isEmpty. Operand 19925 states and 26534 transitions. [2021-11-22 14:48:34,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-22 14:48:34,200 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:48:34,200 INFO L514 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, 1, 1, 1, 1] [2021-11-22 14:48:34,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-22 14:48:34,201 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)] === [2021-11-22 14:48:34,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:48:34,201 INFO L85 PathProgramCache]: Analyzing trace with hash 304093710, now seen corresponding path program 1 times [2021-11-22 14:48:34,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:48:34,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735566795] [2021-11-22 14:48:34,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:48:34,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:48:34,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:48:34,603 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 30 proven. 10 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-22 14:48:34,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:48:34,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735566795] [2021-11-22 14:48:34,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735566795] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:48:34,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311180453] [2021-11-22 14:48:34,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:48:34,604 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:48:34,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:48:34,609 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:48:34,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-22 14:48:35,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:48:35,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 1621 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-22 14:48:35,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:48:35,488 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 [2021-11-22 14:48:35,707 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 30 proven. 10 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-22 14:48:35,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:48:36,035 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 30 proven. 10 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-22 14:48:36,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311180453] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:48:36,035 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:48:36,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2021-11-22 14:48:36,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932023237] [2021-11-22 14:48:36,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:48:36,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-22 14:48:36,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:48:36,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-22 14:48:36,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-11-22 14:48:36,038 INFO L87 Difference]: Start difference. First operand 19925 states and 26534 transitions. Second operand has 15 states, 15 states have (on average 7.8) internal successors, (117), 15 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:48:44,936 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 14:48:50,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:48:50,439 INFO L93 Difference]: Finished difference Result 40665 states and 54709 transitions. [2021-11-22 14:48:50,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-22 14:48:50,440 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 7.8) internal successors, (117), 15 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-11-22 14:48:50,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:48:50,488 INFO L225 Difference]: With dead ends: 40665 [2021-11-22 14:48:50,488 INFO L226 Difference]: Without dead ends: 20753 [2021-11-22 14:48:50,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 229 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2021-11-22 14:48:50,518 INFO L933 BasicCegarLoop]: 859 mSDtfsCounter, 0 mSDsluCounter, 6648 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 7507 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2021-11-22 14:48:50,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 7507 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 10.7s Time] [2021-11-22 14:48:50,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20753 states. [2021-11-22 14:48:53,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20753 to 20753. [2021-11-22 14:48:53,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20753 states, 20194 states have (on average 1.315440229771219) internal successors, (26564), 20266 states have internal predecessors, (26564), 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) [2021-11-22 14:48:53,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20753 states to 20753 states and 27362 transitions. [2021-11-22 14:48:53,612 INFO L78 Accepts]: Start accepts. Automaton has 20753 states and 27362 transitions. Word has length 119 [2021-11-22 14:48:53,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:48:53,613 INFO L470 AbstractCegarLoop]: Abstraction has 20753 states and 27362 transitions. [2021-11-22 14:48:53,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.8) internal successors, (117), 15 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:48:53,613 INFO L276 IsEmpty]: Start isEmpty. Operand 20753 states and 27362 transitions. [2021-11-22 14:48:53,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-22 14:48:53,622 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:48:53,622 INFO L514 BasicCegarLoop]: trace histogram [10, 5, 5, 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, 1, 1, 1, 1] [2021-11-22 14:48:53,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-22 14:48:53,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-22 14:48:53,849 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)] === [2021-11-22 14:48:53,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:48:53,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1304167054, now seen corresponding path program 2 times [2021-11-22 14:48:53,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:48:53,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215036702] [2021-11-22 14:48:53,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:48:53,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:48:54,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:48:54,404 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 30 proven. 55 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-22 14:48:54,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:48:54,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215036702] [2021-11-22 14:48:54,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215036702] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:48:54,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180053596] [2021-11-22 14:48:54,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 14:48:54,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:48:54,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:48:54,406 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:48:54,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-22 14:48:55,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 14:48:55,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:48:55,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 1837 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-22 14:48:55,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:48:55,804 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 30 proven. 55 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-22 14:48:55,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:48:56,348 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 30 proven. 55 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-22 14:48:56,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180053596] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:48:56,348 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:48:56,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 25 [2021-11-22 14:48:56,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119660415] [2021-11-22 14:48:56,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:48:56,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-22 14:48:56,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:48:56,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-22 14:48:56,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-11-22 14:48:56,350 INFO L87 Difference]: Start difference. First operand 20753 states and 27362 transitions. Second operand has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:50:25,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:50:25,219 INFO L93 Difference]: Finished difference Result 122483 states and 158600 transitions. [2021-11-22 14:50:25,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-22 14:50:25,220 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-11-22 14:50:25,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:50:25,655 INFO L225 Difference]: With dead ends: 122483 [2021-11-22 14:50:25,655 INFO L226 Difference]: Without dead ends: 101743 [2021-11-22 14:50:25,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 244 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 25.3s TimeCoverageRelationStatistics Valid=583, Invalid=2839, Unknown=0, NotChecked=0, Total=3422 [2021-11-22 14:50:25,719 INFO L933 BasicCegarLoop]: 1039 mSDtfsCounter, 21037 mSDsluCounter, 15765 mSDsCounter, 0 mSdLazyCounter, 1693 mSolverCounterSat, 1643 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21037 SdHoareTripleChecker+Valid, 16804 SdHoareTripleChecker+Invalid, 3336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1643 IncrementalHoareTripleChecker+Valid, 1693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 42.9s IncrementalHoareTripleChecker+Time [2021-11-22 14:50:25,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21037 Valid, 16804 Invalid, 3336 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1643 Valid, 1693 Invalid, 0 Unknown, 0 Unchecked, 42.9s Time] [2021-11-22 14:50:25,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101743 states. [2021-11-22 14:50:30,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101743 to 20891. [2021-11-22 14:50:30,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20891 states, 20332 states have (on average 1.313299232736573) internal successors, (26702), 20404 states have internal predecessors, (26702), 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) [2021-11-22 14:50:30,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20891 states to 20891 states and 27500 transitions. [2021-11-22 14:50:30,340 INFO L78 Accepts]: Start accepts. Automaton has 20891 states and 27500 transitions. Word has length 125 [2021-11-22 14:50:30,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:50:30,340 INFO L470 AbstractCegarLoop]: Abstraction has 20891 states and 27500 transitions. [2021-11-22 14:50:30,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:50:30,341 INFO L276 IsEmpty]: Start isEmpty. Operand 20891 states and 27500 transitions. [2021-11-22 14:50:30,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-22 14:50:30,349 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:50:30,349 INFO L514 BasicCegarLoop]: trace histogram [10, 5, 5, 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] [2021-11-22 14:50:30,375 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-11-22 14:50:30,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-22 14:50:30,550 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)] === [2021-11-22 14:50:30,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:50:30,550 INFO L85 PathProgramCache]: Analyzing trace with hash -2044070340, now seen corresponding path program 3 times [2021-11-22 14:50:30,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:50:30,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537819845] [2021-11-22 14:50:30,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:50:30,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:50:30,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:50:31,491 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 30 proven. 55 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-22 14:50:31,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:50:31,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537819845] [2021-11-22 14:50:31,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537819845] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:50:31,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114157021] [2021-11-22 14:50:31,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 14:50:31,492 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:50:31,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:50:31,493 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:50:31,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-22 14:50:32,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-22 14:50:32,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:50:32,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 1266 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-22 14:50:32,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:50:33,256 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-22 14:50:33,256 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 14:50:33,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114157021] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:50:33,257 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-22 14:50:33,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13] total 22 [2021-11-22 14:50:33,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298143076] [2021-11-22 14:50:33,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:50:33,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-22 14:50:33,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:50:33,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-22 14:50:33,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-11-22 14:50:33,259 INFO L87 Difference]: Start difference. First operand 20891 states and 27500 transitions. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:51:08,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:51:08,971 INFO L93 Difference]: Finished difference Result 124172 states and 160842 transitions. [2021-11-22 14:51:08,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-11-22 14:51:08,971 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2021-11-22 14:51:08,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:51:09,438 INFO L225 Difference]: With dead ends: 124172 [2021-11-22 14:51:09,438 INFO L226 Difference]: Without dead ends: 105896 [2021-11-22 14:51:09,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2975 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1602, Invalid=8298, Unknown=0, NotChecked=0, Total=9900 [2021-11-22 14:51:09,487 INFO L933 BasicCegarLoop]: 3008 mSDtfsCounter, 8581 mSDsluCounter, 14195 mSDsCounter, 0 mSdLazyCounter, 1570 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8581 SdHoareTripleChecker+Valid, 17203 SdHoareTripleChecker+Invalid, 1781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 1570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-22 14:51:09,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8581 Valid, 17203 Invalid, 1781 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [211 Valid, 1570 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-11-22 14:51:09,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105896 states. [2021-11-22 14:51:16,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105896 to 26582. [2021-11-22 14:51:16,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26582 states, 25849 states have (on average 1.3161050717629308) internal successors, (34020), 25939 states have internal predecessors, (34020), 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) [2021-11-22 14:51:16,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26582 states to 26582 states and 35022 transitions. [2021-11-22 14:51:16,223 INFO L78 Accepts]: Start accepts. Automaton has 26582 states and 35022 transitions. Word has length 126 [2021-11-22 14:51:16,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:51:16,224 INFO L470 AbstractCegarLoop]: Abstraction has 26582 states and 35022 transitions. [2021-11-22 14:51:16,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:51:16,225 INFO L276 IsEmpty]: Start isEmpty. Operand 26582 states and 35022 transitions. [2021-11-22 14:51:16,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-22 14:51:16,243 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:51:16,243 INFO L514 BasicCegarLoop]: trace histogram [10, 7, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:51:16,279 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-11-22 14:51:16,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf2ddae1-6726-45b3-88ea-2330976b9bd8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:51:16,460 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)] === [2021-11-22 14:51:16,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:51:16,460 INFO L85 PathProgramCache]: Analyzing trace with hash 304291309, now seen corresponding path program 1 times [2021-11-22 14:51:16,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:51:16,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915699920] [2021-11-22 14:51:16,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:51:16,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:51:16,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:51:16,647 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-11-22 14:51:16,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:51:16,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915699920] [2021-11-22 14:51:16,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915699920] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:51:16,648 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:51:16,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 14:51:16,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085281123] [2021-11-22 14:51:16,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:51:16,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 14:51:16,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:51:16,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 14:51:16,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 14:51:16,651 INFO L87 Difference]: Start difference. First operand 26582 states and 35022 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)