./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-industry-pattern/mod3.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7e70badd Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65363c59-c9a6-4a2b-ac5b-047e12bce8cf/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65363c59-c9a6-4a2b-ac5b-047e12bce8cf/bin/uautomizer-wIGwrQj20G/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65363c59-c9a6-4a2b-ac5b-047e12bce8cf/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65363c59-c9a6-4a2b-ac5b-047e12bce8cf/bin/uautomizer-wIGwrQj20G/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-industry-pattern/mod3.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65363c59-c9a6-4a2b-ac5b-047e12bce8cf/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65363c59-c9a6-4a2b-ac5b-047e12bce8cf/bin/uautomizer-wIGwrQj20G --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 92b4501808affebdeca741bfd6f75263ab313d5eceb196bbb78aea107ecea6ed --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 12:25:06,652 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 12:25:06,656 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 12:25:06,720 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 12:25:06,721 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 12:25:06,727 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 12:25:06,733 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 12:25:06,738 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 12:25:06,741 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 12:25:06,747 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 12:25:06,749 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 12:25:06,751 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 12:25:06,752 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 12:25:06,754 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 12:25:06,757 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 12:25:06,762 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 12:25:06,764 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 12:25:06,766 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 12:25:06,768 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 12:25:06,777 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 12:25:06,779 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 12:25:06,781 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 12:25:06,785 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 12:25:06,786 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 12:25:06,797 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 12:25:06,797 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 12:25:06,798 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 12:25:06,800 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 12:25:06,801 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 12:25:06,803 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 12:25:06,803 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 12:25:06,804 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 12:25:06,807 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 12:25:06,808 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 12:25:06,810 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 12:25:06,810 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 12:25:06,811 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 12:25:06,811 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 12:25:06,811 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 12:25:06,813 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 12:25:06,813 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 12:25:06,814 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65363c59-c9a6-4a2b-ac5b-047e12bce8cf/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-23 12:25:06,868 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 12:25:06,869 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 12:25:06,870 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 12:25:06,870 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 12:25:06,879 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 12:25:06,880 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 12:25:06,880 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 12:25:06,880 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 12:25:06,881 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 12:25:06,881 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 12:25:06,882 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 12:25:06,883 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 12:25:06,883 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 12:25:06,883 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 12:25:06,883 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 12:25:06,884 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 12:25:06,884 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 12:25:06,884 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 12:25:06,884 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 12:25:06,885 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 12:25:06,885 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 12:25:06,885 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 12:25:06,885 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 12:25:06,886 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 12:25:06,886 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 12:25:06,886 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 12:25:06,886 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 12:25:06,887 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 12:25:06,887 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-23 12:25:06,887 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-23 12:25:06,887 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 12:25:06,888 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 12:25:06,888 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_65363c59-c9a6-4a2b-ac5b-047e12bce8cf/bin/uautomizer-wIGwrQj20G/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65363c59-c9a6-4a2b-ac5b-047e12bce8cf/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 92b4501808affebdeca741bfd6f75263ab313d5eceb196bbb78aea107ecea6ed [2021-11-23 12:25:07,269 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 12:25:07,304 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 12:25:07,308 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 12:25:07,310 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 12:25:07,310 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 12:25:07,312 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65363c59-c9a6-4a2b-ac5b-047e12bce8cf/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/loop-industry-pattern/mod3.c.v+cfa-reducer.c [2021-11-23 12:25:07,412 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65363c59-c9a6-4a2b-ac5b-047e12bce8cf/bin/uautomizer-wIGwrQj20G/data/83b2e47ca/b187a703f9cd42dfa34017c0b5fea62b/FLAGbf7f4f212 [2021-11-23 12:25:08,090 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 12:25:08,092 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65363c59-c9a6-4a2b-ac5b-047e12bce8cf/sv-benchmarks/c/loop-industry-pattern/mod3.c.v+cfa-reducer.c [2021-11-23 12:25:08,106 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65363c59-c9a6-4a2b-ac5b-047e12bce8cf/bin/uautomizer-wIGwrQj20G/data/83b2e47ca/b187a703f9cd42dfa34017c0b5fea62b/FLAGbf7f4f212 [2021-11-23 12:25:08,435 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65363c59-c9a6-4a2b-ac5b-047e12bce8cf/bin/uautomizer-wIGwrQj20G/data/83b2e47ca/b187a703f9cd42dfa34017c0b5fea62b [2021-11-23 12:25:08,439 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 12:25:08,442 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 12:25:08,447 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 12:25:08,448 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 12:25:08,452 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 12:25:08,453 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:25:08" (1/1) ... [2021-11-23 12:25:08,455 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47b9fd06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:25:08, skipping insertion in model container [2021-11-23 12:25:08,455 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:25:08" (1/1) ... [2021-11-23 12:25:08,464 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 12:25:08,487 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 12:25:08,774 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_65363c59-c9a6-4a2b-ac5b-047e12bce8cf/sv-benchmarks/c/loop-industry-pattern/mod3.c.v+cfa-reducer.c[1250,1263] [2021-11-23 12:25:08,781 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 12:25:08,792 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 12:25:08,814 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_65363c59-c9a6-4a2b-ac5b-047e12bce8cf/sv-benchmarks/c/loop-industry-pattern/mod3.c.v+cfa-reducer.c[1250,1263] [2021-11-23 12:25:08,816 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 12:25:08,832 INFO L208 MainTranslator]: Completed translation [2021-11-23 12:25:08,833 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:25:08 WrapperNode [2021-11-23 12:25:08,833 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 12:25:08,834 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 12:25:08,834 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 12:25:08,835 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 12:25:08,841 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:25:08" (1/1) ... [2021-11-23 12:25:08,852 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:25:08" (1/1) ... [2021-11-23 12:25:08,886 INFO L137 Inliner]: procedures = 13, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 56 [2021-11-23 12:25:08,887 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 12:25:08,888 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 12:25:08,888 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 12:25:08,889 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 12:25:08,899 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:25:08" (1/1) ... [2021-11-23 12:25:08,899 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:25:08" (1/1) ... [2021-11-23 12:25:08,916 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:25:08" (1/1) ... [2021-11-23 12:25:08,917 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:25:08" (1/1) ... [2021-11-23 12:25:08,920 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:25:08" (1/1) ... [2021-11-23 12:25:08,934 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:25:08" (1/1) ... [2021-11-23 12:25:08,936 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:25:08" (1/1) ... [2021-11-23 12:25:08,939 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 12:25:08,943 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 12:25:08,944 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 12:25:08,944 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 12:25:08,946 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:25:08" (1/1) ... [2021-11-23 12:25:08,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 12:25:08,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65363c59-c9a6-4a2b-ac5b-047e12bce8cf/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:25:08,990 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65363c59-c9a6-4a2b-ac5b-047e12bce8cf/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 12:25:09,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65363c59-c9a6-4a2b-ac5b-047e12bce8cf/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 12:25:09,061 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 12:25:09,061 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 12:25:09,062 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 12:25:09,062 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 12:25:09,145 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 12:25:09,147 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 12:25:13,730 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 12:25:13,737 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 12:25:13,737 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 12:25:13,739 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:25:13 BoogieIcfgContainer [2021-11-23 12:25:13,740 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 12:25:13,742 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 12:25:13,756 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 12:25:13,760 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 12:25:13,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 12:25:08" (1/3) ... [2021-11-23 12:25:13,761 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b82fb48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:25:13, skipping insertion in model container [2021-11-23 12:25:13,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:25:08" (2/3) ... [2021-11-23 12:25:13,762 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b82fb48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:25:13, skipping insertion in model container [2021-11-23 12:25:13,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:25:13" (3/3) ... [2021-11-23 12:25:13,764 INFO L111 eAbstractionObserver]: Analyzing ICFG mod3.c.v+cfa-reducer.c [2021-11-23 12:25:13,770 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 12:25:13,784 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 12:25:13,842 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 12:25:13,851 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 12:25:13,851 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 12:25:13,868 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 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) [2021-11-23 12:25:13,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 12:25:13,875 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:25:13,875 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:25:13,876 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:25:13,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:25:13,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1804535397, now seen corresponding path program 1 times [2021-11-23 12:25:13,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:25:13,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844438219] [2021-11-23 12:25:13,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:25:13,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:25:14,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:25:14,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:25:14,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:25:14,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844438219] [2021-11-23 12:25:14,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844438219] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:25:14,257 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:25:14,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:25:14,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821052177] [2021-11-23 12:25:14,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:25:14,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:25:14,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:25:14,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:25:14,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:25:14,309 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 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) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:25:16,327 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 12:25:18,525 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 12:25:18,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:25:18,755 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2021-11-23 12:25:18,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:25:18,758 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-11-23 12:25:18,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:25:18,769 INFO L225 Difference]: With dead ends: 29 [2021-11-23 12:25:18,770 INFO L226 Difference]: Without dead ends: 16 [2021-11-23 12:25:18,773 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 [2021-11-23 12:25:18,778 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 6 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-11-23 12:25:18,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 28 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 3 Invalid, 2 Unknown, 0 Unchecked, 4.4s Time] [2021-11-23 12:25:18,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-23 12:25:18,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 13. [2021-11-23 12:25:18,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:25:18,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2021-11-23 12:25:18,815 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 7 [2021-11-23 12:25:18,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:25:18,816 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2021-11-23 12:25:18,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:25:18,816 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2021-11-23 12:25:18,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 12:25:18,817 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:25:18,817 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:25:18,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 12:25:18,818 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:25:18,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:25:18,820 INFO L85 PathProgramCache]: Analyzing trace with hash -527269500, now seen corresponding path program 1 times [2021-11-23 12:25:18,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:25:18,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200573080] [2021-11-23 12:25:18,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:25:18,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:25:18,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:25:19,083 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:25:19,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:25:19,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200573080] [2021-11-23 12:25:19,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200573080] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:25:19,086 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:25:19,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 12:25:19,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693862645] [2021-11-23 12:25:19,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:25:19,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 12:25:19,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:25:19,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 12:25:19,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:25:19,096 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:25:21,123 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 12:25:23,321 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.20s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 12:25:25,514 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 12:25:27,775 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 12:25:27,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:25:27,992 INFO L93 Difference]: Finished difference Result 31 states and 41 transitions. [2021-11-23 12:25:27,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 12:25:27,993 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2021-11-23 12:25:27,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:25:27,994 INFO L225 Difference]: With dead ends: 31 [2021-11-23 12:25:27,994 INFO L226 Difference]: Without dead ends: 18 [2021-11-23 12:25:27,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:25:27,997 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 4 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2021-11-23 12:25:27,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 34 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 4 Unknown, 0 Unchecked, 8.9s Time] [2021-11-23 12:25:27,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-23 12:25:28,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-11-23 12:25:28,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 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) [2021-11-23 12:25:28,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2021-11-23 12:25:28,004 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 10 [2021-11-23 12:25:28,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:25:28,004 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2021-11-23 12:25:28,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:25:28,005 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2021-11-23 12:25:28,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 12:25:28,011 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:25:28,011 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:25:28,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 12:25:28,012 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:25:28,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:25:28,013 INFO L85 PathProgramCache]: Analyzing trace with hash -473877953, now seen corresponding path program 1 times [2021-11-23 12:25:28,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:25:28,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563129464] [2021-11-23 12:25:28,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:25:28,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:25:28,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:25:28,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:25:28,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:25:28,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563129464] [2021-11-23 12:25:28,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563129464] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:25:28,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526209823] [2021-11-23 12:25:28,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:25:28,647 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:25:28,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65363c59-c9a6-4a2b-ac5b-047e12bce8cf/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:25:28,653 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65363c59-c9a6-4a2b-ac5b-047e12bce8cf/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:25:28,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65363c59-c9a6-4a2b-ac5b-047e12bce8cf/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process