./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2018/Problem13.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d30c466-735c-4419-886d-d7a8355bfe1e/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d30c466-735c-4419-886d-d7a8355bfe1e/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d30c466-735c-4419-886d-d7a8355bfe1e/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d30c466-735c-4419-886d-d7a8355bfe1e/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2018/Problem13.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d30c466-735c-4419-886d-d7a8355bfe1e/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d30c466-735c-4419-886d-d7a8355bfe1e/bin/uautomizer-IVEQpCNsaX --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 39257b2f2790dc593eb015569e826a332fcc3e3cd918d00daa305f748c1b3d75 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 09:39:08,595 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 09:39:08,597 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 09:39:08,637 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 09:39:08,638 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 09:39:08,640 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 09:39:08,642 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 09:39:08,646 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 09:39:08,649 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 09:39:08,650 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 09:39:08,652 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 09:39:08,654 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 09:39:08,655 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 09:39:08,657 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 09:39:08,659 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 09:39:08,661 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 09:39:08,663 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 09:39:08,665 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 09:39:08,668 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 09:39:08,671 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 09:39:08,674 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 09:39:08,676 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 09:39:08,678 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 09:39:08,679 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 09:39:08,684 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 09:39:08,685 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 09:39:08,685 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 09:39:08,687 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 09:39:08,688 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 09:39:08,690 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 09:39:08,690 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 09:39:08,692 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 09:39:08,693 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 09:39:08,694 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 09:39:08,696 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 09:39:08,697 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 09:39:08,698 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 09:39:08,699 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 09:39:08,699 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 09:39:08,701 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 09:39:08,702 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 09:39:08,704 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d30c466-735c-4419-886d-d7a8355bfe1e/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 09:39:08,737 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 09:39:08,738 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 09:39:08,738 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 09:39:08,738 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 09:39:08,740 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 09:39:08,740 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 09:39:08,741 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 09:39:08,741 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 09:39:08,741 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 09:39:08,742 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 09:39:08,742 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 09:39:08,742 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 09:39:08,743 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 09:39:08,743 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 09:39:08,743 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 09:39:08,743 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 09:39:08,744 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 09:39:08,744 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 09:39:08,744 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 09:39:08,745 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 09:39:08,745 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 09:39:08,745 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 09:39:08,746 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:39:08,746 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 09:39:08,746 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 09:39:08,747 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 09:39:08,747 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 09:39:08,747 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 09:39:08,748 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 09:39:08,748 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 09:39:08,748 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 09:39:08,749 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 09:39:08,749 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_7d30c466-735c-4419-886d-d7a8355bfe1e/bin/uautomizer-IVEQpCNsaX/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d30c466-735c-4419-886d-d7a8355bfe1e/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39257b2f2790dc593eb015569e826a332fcc3e3cd918d00daa305f748c1b3d75 [2021-11-09 09:39:09,077 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 09:39:09,125 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 09:39:09,130 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 09:39:09,132 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 09:39:09,133 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 09:39:09,134 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d30c466-735c-4419-886d-d7a8355bfe1e/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/eca-rers2018/Problem13.c [2021-11-09 09:39:09,211 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d30c466-735c-4419-886d-d7a8355bfe1e/bin/uautomizer-IVEQpCNsaX/data/357045e66/9e1744c1de1c4c9e9e0df04c772c5d69/FLAG82ff27d4d [2021-11-09 09:39:11,954 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 09:39:11,958 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d30c466-735c-4419-886d-d7a8355bfe1e/sv-benchmarks/c/eca-rers2018/Problem13.c [2021-11-09 09:39:12,156 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d30c466-735c-4419-886d-d7a8355bfe1e/bin/uautomizer-IVEQpCNsaX/data/357045e66/9e1744c1de1c4c9e9e0df04c772c5d69/FLAG82ff27d4d [2021-11-09 09:39:12,180 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d30c466-735c-4419-886d-d7a8355bfe1e/bin/uautomizer-IVEQpCNsaX/data/357045e66/9e1744c1de1c4c9e9e0df04c772c5d69 [2021-11-09 09:39:12,186 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 09:39:12,189 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 09:39:12,192 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 09:39:12,193 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 09:39:12,197 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 09:39:12,198 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:39:12" (1/1) ... [2021-11-09 09:39:12,200 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78e6cbf3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:39:12, skipping insertion in model container [2021-11-09 09:39:12,200 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:39:12" (1/1) ... [2021-11-09 09:39:12,210 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 09:39:13,230 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 09:39:13,592 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d30c466-735c-4419-886d-d7a8355bfe1e/sv-benchmarks/c/eca-rers2018/Problem13.c[778,791] [2021-11-09 09:39:13,624 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d30c466-735c-4419-886d-d7a8355bfe1e/sv-benchmarks/c/eca-rers2018/Problem13.c[817,830] [2021-11-09 09:39:31,450 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:39:31,471 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 09:39:31,487 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d30c466-735c-4419-886d-d7a8355bfe1e/sv-benchmarks/c/eca-rers2018/Problem13.c[778,791] [2021-11-09 09:39:31,488 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d30c466-735c-4419-886d-d7a8355bfe1e/sv-benchmarks/c/eca-rers2018/Problem13.c[817,830] [2021-11-09 09:39:33,845 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:39:35,467 INFO L208 MainTranslator]: Completed translation [2021-11-09 09:39:35,468 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:39:35 WrapperNode [2021-11-09 09:39:35,468 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 09:39:35,470 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 09:39:35,470 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 09:39:35,470 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 09:39:35,491 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:39:35" (1/1) ... [2021-11-09 09:39:36,493 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:39:35" (1/1) ... [2021-11-09 09:39:38,911 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 09:39:38,913 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 09:39:38,913 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 09:39:38,913 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 09:39:38,924 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:39:35" (1/1) ... [2021-11-09 09:39:38,925 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:39:35" (1/1) ... [2021-11-09 09:39:39,498 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:39:35" (1/1) ... [2021-11-09 09:39:39,498 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:39:35" (1/1) ... [2021-11-09 09:39:41,172 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:39:35" (1/1) ... [2021-11-09 09:39:41,588 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:39:35" (1/1) ... [2021-11-09 09:39:42,078 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:39:35" (1/1) ... [2021-11-09 09:39:42,499 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 09:39:42,501 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 09:39:42,501 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 09:39:42,502 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 09:39:42,503 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:39:35" (1/1) ... [2021-11-09 09:39:42,513 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:39:42,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d30c466-735c-4419-886d-d7a8355bfe1e/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:39:42,550 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d30c466-735c-4419-886d-d7a8355bfe1e/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 09:39:42,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d30c466-735c-4419-886d-d7a8355bfe1e/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 09:39:42,596 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 09:39:42,596 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 09:39:42,597 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 09:39:42,597 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 09:40:05,485 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 09:40:05,485 INFO L299 CfgBuilder]: Removed 1395 assume(true) statements. [2021-11-09 09:40:05,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:40:05 BoogieIcfgContainer [2021-11-09 09:40:05,492 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 09:40:05,495 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 09:40:05,496 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 09:40:05,506 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 09:40:05,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 09:39:12" (1/3) ... [2021-11-09 09:40:05,507 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f044d21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:40:05, skipping insertion in model container [2021-11-09 09:40:05,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:39:35" (2/3) ... [2021-11-09 09:40:05,508 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f044d21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:40:05, skipping insertion in model container [2021-11-09 09:40:05,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:40:05" (3/3) ... [2021-11-09 09:40:05,510 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13.c [2021-11-09 09:40:05,517 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 09:40:05,518 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 100 error locations. [2021-11-09 09:40:05,600 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 09:40:05,608 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-09 09:40:05,608 INFO L340 AbstractCegarLoop]: Starting to check reachability of 100 error locations. [2021-11-09 09:40:05,694 INFO L276 IsEmpty]: Start isEmpty. Operand has 3029 states, 2928 states have (on average 1.9989754098360655) internal successors, (5853), 3028 states have internal predecessors, (5853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:05,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-09 09:40:05,706 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:40:05,707 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:40:05,708 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 97 more)] === [2021-11-09 09:40:05,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:40:05,715 INFO L85 PathProgramCache]: Analyzing trace with hash 960990940, now seen corresponding path program 1 times [2021-11-09 09:40:05,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:40:05,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473868199] [2021-11-09 09:40:05,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:40:05,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:40:05,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:06,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:40:06,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:40:06,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473868199] [2021-11-09 09:40:06,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473868199] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:40:06,449 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:40:06,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:40:06,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234389996] [2021-11-09 09:40:06,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:40:06,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:40:06,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:40:06,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:40:06,511 INFO L87 Difference]: Start difference. First operand has 3029 states, 2928 states have (on average 1.9989754098360655) internal successors, (5853), 3028 states have internal predecessors, (5853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:24,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:40:24,452 INFO L93 Difference]: Finished difference Result 8264 states and 16052 transitions. [2021-11-09 09:40:24,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:40:24,458 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2021-11-09 09:40:24,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:40:24,538 INFO L225 Difference]: With dead ends: 8264 [2021-11-09 09:40:24,539 INFO L226 Difference]: Without dead ends: 5228 [2021-11-09 09:40:24,552 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:40:24,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5228 states. [2021-11-09 09:40:24,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5228 to 4543. [2021-11-09 09:40:24,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4543 states, 4443 states have (on average 1.907720009002926) internal successors, (8476), 4542 states have internal predecessors, (8476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:24,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4543 states to 4543 states and 8476 transitions. [2021-11-09 09:40:24,869 INFO L78 Accepts]: Start accepts. Automaton has 4543 states and 8476 transitions. Word has length 11 [2021-11-09 09:40:24,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:40:24,869 INFO L470 AbstractCegarLoop]: Abstraction has 4543 states and 8476 transitions. [2021-11-09 09:40:24,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:24,870 INFO L276 IsEmpty]: Start isEmpty. Operand 4543 states and 8476 transitions. [2021-11-09 09:40:24,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-09 09:40:24,884 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:40:24,884 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:40:24,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 09:40:24,885 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 97 more)] === [2021-11-09 09:40:24,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:40:24,891 INFO L85 PathProgramCache]: Analyzing trace with hash 204748125, now seen corresponding path program 1 times [2021-11-09 09:40:24,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:40:24,894 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985075496] [2021-11-09 09:40:24,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:40:24,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:40:24,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:25,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:40:25,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:40:25,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985075496] [2021-11-09 09:40:25,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985075496] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:40:25,145 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:40:25,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:40:25,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886065295] [2021-11-09 09:40:25,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:40:25,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:40:25,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:40:25,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:40:25,149 INFO L87 Difference]: Start difference. First operand 4543 states and 8476 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:37,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:40:37,969 INFO L93 Difference]: Finished difference Result 10371 states and 19129 transitions. [2021-11-09 09:40:37,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:40:37,970 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-09 09:40:37,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:40:38,016 INFO L225 Difference]: With dead ends: 10371 [2021-11-09 09:40:38,017 INFO L226 Difference]: Without dead ends: 5830 [2021-11-09 09:40:38,025 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:40:38,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5830 states. [2021-11-09 09:40:38,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5830 to 5313. [2021-11-09 09:40:38,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5313 states, 5213 states have (on average 1.863993861500096) internal successors, (9717), 5312 states have internal predecessors, (9717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:38,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5313 states to 5313 states and 9717 transitions. [2021-11-09 09:40:38,223 INFO L78 Accepts]: Start accepts. Automaton has 5313 states and 9717 transitions. Word has length 20 [2021-11-09 09:40:38,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:40:38,224 INFO L470 AbstractCegarLoop]: Abstraction has 5313 states and 9717 transitions. [2021-11-09 09:40:38,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:38,225 INFO L276 IsEmpty]: Start isEmpty. Operand 5313 states and 9717 transitions. [2021-11-09 09:40:38,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-09 09:40:38,226 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:40:38,228 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:40:38,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 09:40:38,229 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 97 more)] === [2021-11-09 09:40:38,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:40:38,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1548865657, now seen corresponding path program 1 times [2021-11-09 09:40:38,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:40:38,231 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941766085] [2021-11-09 09:40:38,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:40:38,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:40:38,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:38,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:40:38,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:40:38,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941766085] [2021-11-09 09:40:38,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941766085] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:40:38,406 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:40:38,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 09:40:38,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3363337] [2021-11-09 09:40:38,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:40:38,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:40:38,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:40:38,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:40:38,420 INFO L87 Difference]: Start difference. First operand 5313 states and 9717 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) [2021-11-09 09:40:38,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:40:38,880 INFO L93 Difference]: Finished difference Result 15469 states and 28315 transitions. [2021-11-09 09:40:38,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:40:38,881 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 [2021-11-09 09:40:38,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:40:38,969 INFO L225 Difference]: With dead ends: 15469 [2021-11-09 09:40:38,969 INFO L226 Difference]: Without dead ends: 10158 [2021-11-09 09:40:38,980 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:40:39,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10158 states. [2021-11-09 09:40:39,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10158 to 9969. [2021-11-09 09:40:39,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9969 states, 9869 states have (on average 1.8737460735636842) internal successors, (18492), 9968 states have internal predecessors, (18492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:39,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9969 states to 9969 states and 18492 transitions. [2021-11-09 09:40:39,372 INFO L78 Accepts]: Start accepts. Automaton has 9969 states and 18492 transitions. Word has length 28 [2021-11-09 09:40:39,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:40:39,373 INFO L470 AbstractCegarLoop]: Abstraction has 9969 states and 18492 transitions. [2021-11-09 09:40:39,374 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) [2021-11-09 09:40:39,374 INFO L276 IsEmpty]: Start isEmpty. Operand 9969 states and 18492 transitions. [2021-11-09 09:40:39,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-09 09:40:39,376 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:40:39,376 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:40:39,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-09 09:40:39,377 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 97 more)] === [2021-11-09 09:40:39,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:40:39,378 INFO L85 PathProgramCache]: Analyzing trace with hash 830564229, now seen corresponding path program 1 times [2021-11-09 09:40:39,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:40:39,379 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247103323] [2021-11-09 09:40:39,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:40:39,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:40:39,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:39,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:40:39,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:40:39,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247103323] [2021-11-09 09:40:39,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247103323] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:40:39,529 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:40:39,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 09:40:39,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361996282] [2021-11-09 09:40:39,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:40:39,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:40:39,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:40:39,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:40:39,533 INFO L87 Difference]: Start difference. First operand 9969 states and 18492 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) [2021-11-09 09:40:39,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:40:39,837 INFO L93 Difference]: Finished difference Result 29873 states and 55419 transitions. [2021-11-09 09:40:39,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:40:39,838 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 [2021-11-09 09:40:39,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:40:39,914 INFO L225 Difference]: With dead ends: 29873 [2021-11-09 09:40:39,914 INFO L226 Difference]: Without dead ends: 19906 [2021-11-09 09:40:39,935 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:40:39,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19906 states. [2021-11-09 09:40:40,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19906 to 19708. [2021-11-09 09:40:40,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19708 states, 19608 states have (on average 1.8774989800081598) internal successors, (36814), 19707 states have internal predecessors, (36814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:40,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19708 states to 19708 states and 36814 transitions. [2021-11-09 09:40:40,457 INFO L78 Accepts]: Start accepts. Automaton has 19708 states and 36814 transitions. Word has length 28 [2021-11-09 09:40:40,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:40:40,458 INFO L470 AbstractCegarLoop]: Abstraction has 19708 states and 36814 transitions. [2021-11-09 09:40:40,459 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) [2021-11-09 09:40:40,459 INFO L276 IsEmpty]: Start isEmpty. Operand 19708 states and 36814 transitions. [2021-11-09 09:40:40,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-09 09:40:40,461 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:40:40,461 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:40:40,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-09 09:40:40,462 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 97 more)] === [2021-11-09 09:40:40,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:40:40,463 INFO L85 PathProgramCache]: Analyzing trace with hash -22290270, now seen corresponding path program 1 times [2021-11-09 09:40:40,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:40:40,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206753365] [2021-11-09 09:40:40,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:40:40,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:40:40,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:40,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:40:40,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:40:40,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206753365] [2021-11-09 09:40:40,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206753365] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:40:40,566 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:40:40,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 09:40:40,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029062345] [2021-11-09 09:40:40,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:40:40,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:40:40,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:40:40,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:40:40,569 INFO L87 Difference]: Start difference. First operand 19708 states and 36814 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) [2021-11-09 09:40:40,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:40:40,949 INFO L93 Difference]: Finished difference Result 58726 states and 109660 transitions. [2021-11-09 09:40:40,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:40:40,950 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 [2021-11-09 09:40:40,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:40:41,047 INFO L225 Difference]: With dead ends: 58726 [2021-11-09 09:40:41,047 INFO L226 Difference]: Without dead ends: 39020 [2021-11-09 09:40:41,085 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:40:41,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39020 states. [2021-11-09 09:40:41,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39020 to 38824. [2021-11-09 09:40:41,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38824 states, 38724 states have (on average 1.877956822642289) internal successors, (72722), 38823 states have internal predecessors, (72722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:41,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38824 states to 38824 states and 72722 transitions. [2021-11-09 09:40:41,928 INFO L78 Accepts]: Start accepts. Automaton has 38824 states and 72722 transitions. Word has length 29 [2021-11-09 09:40:41,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:40:41,929 INFO L470 AbstractCegarLoop]: Abstraction has 38824 states and 72722 transitions. [2021-11-09 09:40:41,930 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) [2021-11-09 09:40:41,930 INFO L276 IsEmpty]: Start isEmpty. Operand 38824 states and 72722 transitions. [2021-11-09 09:40:41,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-09 09:40:41,932 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:40:41,932 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:40:41,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-09 09:40:41,933 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 97 more)] === [2021-11-09 09:40:41,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:40:41,934 INFO L85 PathProgramCache]: Analyzing trace with hash -690975953, now seen corresponding path program 1 times [2021-11-09 09:40:41,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:40:41,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451909314] [2021-11-09 09:40:41,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:40:41,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:40:41,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:42,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:40:42,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:40:42,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451909314] [2021-11-09 09:40:42,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451909314] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:40:42,086 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:40:42,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 09:40:42,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353091061] [2021-11-09 09:40:42,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:40:42,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:40:42,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:40:42,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:40:42,094 INFO L87 Difference]: Start difference. First operand 38824 states and 72722 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:43,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:40:43,988 INFO L93 Difference]: Finished difference Result 112446 states and 210599 transitions. [2021-11-09 09:40:43,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:40:43,990 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-09 09:40:43,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:40:44,168 INFO L225 Difference]: With dead ends: 112446 [2021-11-09 09:40:44,169 INFO L226 Difference]: Without dead ends: 73624 [2021-11-09 09:40:44,229 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:40:44,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73624 states. [2021-11-09 09:40:45,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73624 to 73280. [2021-11-09 09:40:45,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73280 states, 73180 states have (on average 1.872068871276305) internal successors, (136998), 73279 states have internal predecessors, (136998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:45,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73280 states to 73280 states and 136998 transitions. [2021-11-09 09:40:45,716 INFO L78 Accepts]: Start accepts. Automaton has 73280 states and 136998 transitions. Word has length 30 [2021-11-09 09:40:45,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:40:45,717 INFO L470 AbstractCegarLoop]: Abstraction has 73280 states and 136998 transitions. [2021-11-09 09:40:45,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:45,717 INFO L276 IsEmpty]: Start isEmpty. Operand 73280 states and 136998 transitions. [2021-11-09 09:40:45,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-09 09:40:45,720 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:40:45,720 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:40:45,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-09 09:40:45,721 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 97 more)] === [2021-11-09 09:40:45,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:40:45,722 INFO L85 PathProgramCache]: Analyzing trace with hash 54604364, now seen corresponding path program 1 times [2021-11-09 09:40:45,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:40:45,723 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737305454] [2021-11-09 09:40:45,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:40:45,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:40:45,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:45,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:40:45,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:40:45,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737305454] [2021-11-09 09:40:45,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737305454] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:40:45,809 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:40:45,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:40:45,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449643425] [2021-11-09 09:40:45,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:40:45,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:40:45,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:40:45,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:40:45,812 INFO L87 Difference]: Start difference. First operand 73280 states and 136998 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:51,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:40:51,442 INFO L93 Difference]: Finished difference Result 193950 states and 366430 transitions. [2021-11-09 09:40:51,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:40:51,443 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-09 09:40:51,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:40:51,722 INFO L225 Difference]: With dead ends: 193950 [2021-11-09 09:40:51,722 INFO L226 Difference]: Without dead ends: 120672 [2021-11-09 09:40:51,793 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:40:51,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120672 states. [2021-11-09 09:40:55,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120672 to 115954. [2021-11-09 09:40:55,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115954 states, 115854 states have (on average 1.8940045229340376) internal successors, (219428), 115953 states have internal predecessors, (219428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:55,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115954 states to 115954 states and 219428 transitions. [2021-11-09 09:40:55,621 INFO L78 Accepts]: Start accepts. Automaton has 115954 states and 219428 transitions. Word has length 31 [2021-11-09 09:40:55,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:40:55,621 INFO L470 AbstractCegarLoop]: Abstraction has 115954 states and 219428 transitions. [2021-11-09 09:40:55,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:40:55,622 INFO L276 IsEmpty]: Start isEmpty. Operand 115954 states and 219428 transitions. [2021-11-09 09:40:55,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-09 09:40:55,625 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:40:55,625 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:40:55,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-09 09:40:55,626 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 97 more)] === [2021-11-09 09:40:55,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:40:55,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1835841116, now seen corresponding path program 1 times [2021-11-09 09:40:55,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:40:55,627 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905098475] [2021-11-09 09:40:55,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:40:55,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:40:55,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:55,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:40:55,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:40:55,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905098475] [2021-11-09 09:40:55,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905098475] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:40:55,805 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:40:55,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:40:55,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682292320] [2021-11-09 09:40:55,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:40:55,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:40:55,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:40:55,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:40:55,807 INFO L87 Difference]: Start difference. First operand 115954 states and 219428 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:41:12,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:41:12,511 INFO L93 Difference]: Finished difference Result 266890 states and 503459 transitions. [2021-11-09 09:41:12,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:41:12,512 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-09 09:41:12,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:41:12,777 INFO L225 Difference]: With dead ends: 266890 [2021-11-09 09:41:12,777 INFO L226 Difference]: Without dead ends: 150938 [2021-11-09 09:41:12,834 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:41:12,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150938 states. [2021-11-09 09:41:15,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150938 to 139918. [2021-11-09 09:41:15,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139918 states, 139818 states have (on average 1.8748372884750175) internal successors, (262136), 139917 states have internal predecessors, (262136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:41:16,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139918 states to 139918 states and 262136 transitions. [2021-11-09 09:41:16,237 INFO L78 Accepts]: Start accepts. Automaton has 139918 states and 262136 transitions. Word has length 32 [2021-11-09 09:41:16,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:41:16,237 INFO L470 AbstractCegarLoop]: Abstraction has 139918 states and 262136 transitions. [2021-11-09 09:41:16,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:41:16,238 INFO L276 IsEmpty]: Start isEmpty. Operand 139918 states and 262136 transitions. [2021-11-09 09:41:16,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-09 09:41:16,241 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:41:16,241 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:41:16,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-09 09:41:16,242 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 97 more)] === [2021-11-09 09:41:16,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:41:16,243 INFO L85 PathProgramCache]: Analyzing trace with hash -944445929, now seen corresponding path program 1 times [2021-11-09 09:41:16,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:41:16,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052559405] [2021-11-09 09:41:16,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:41:16,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:41:16,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:16,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:41:16,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:41:16,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052559405] [2021-11-09 09:41:16,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052559405] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:41:16,538 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:41:16,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:41:16,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903429420] [2021-11-09 09:41:16,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:41:16,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:41:16,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:41:16,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:41:16,540 INFO L87 Difference]: Start difference. First operand 139918 states and 262136 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:41:28,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:41:28,022 INFO L93 Difference]: Finished difference Result 262188 states and 486312 transitions. [2021-11-09 09:41:28,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:41:28,029 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-09 09:41:28,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:41:28,223 INFO L225 Difference]: With dead ends: 262188 [2021-11-09 09:41:28,223 INFO L226 Difference]: Without dead ends: 122272 [2021-11-09 09:41:28,283 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:41:28,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122272 states. [2021-11-09 09:41:30,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122272 to 109738. [2021-11-09 09:41:30,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109738 states, 109638 states have (on average 1.474725916196939) internal successors, (161686), 109737 states have internal predecessors, (161686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:41:30,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109738 states to 109738 states and 161686 transitions. [2021-11-09 09:41:30,392 INFO L78 Accepts]: Start accepts. Automaton has 109738 states and 161686 transitions. Word has length 35 [2021-11-09 09:41:30,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:41:30,393 INFO L470 AbstractCegarLoop]: Abstraction has 109738 states and 161686 transitions. [2021-11-09 09:41:30,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:41:30,393 INFO L276 IsEmpty]: Start isEmpty. Operand 109738 states and 161686 transitions. [2021-11-09 09:41:30,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-09 09:41:30,394 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:41:30,395 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:41:30,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-09 09:41:30,395 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 97 more)] === [2021-11-09 09:41:30,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:41:30,396 INFO L85 PathProgramCache]: Analyzing trace with hash -81525512, now seen corresponding path program 1 times [2021-11-09 09:41:30,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:41:30,396 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607998313] [2021-11-09 09:41:30,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:41:30,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:41:30,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:30,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:41:30,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:41:30,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607998313] [2021-11-09 09:41:30,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607998313] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:41:30,552 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:41:30,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:41:30,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425777882] [2021-11-09 09:41:30,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:41:30,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:41:30,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:41:30,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:41:30,555 INFO L87 Difference]: Start difference. First operand 109738 states and 161686 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)