./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_init6_ground-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc24f5a-06d0-4d59-ba3b-86cdbbb3d565/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc24f5a-06d0-4d59-ba3b-86cdbbb3d565/bin/uautomizer-AkOaLMaTGY/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc24f5a-06d0-4d59-ba3b-86cdbbb3d565/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc24f5a-06d0-4d59-ba3b-86cdbbb3d565/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/standard_init6_ground-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc24f5a-06d0-4d59-ba3b-86cdbbb3d565/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc24f5a-06d0-4d59-ba3b-86cdbbb3d565/bin/uautomizer-AkOaLMaTGY --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 388c926a79a6b5e7bef889b40d9a18e5c4aeb62f40be1f5a1ab2f0fe0344f6c1 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 08:14:32,467 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 08:14:32,470 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 08:14:32,519 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 08:14:32,520 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 08:14:32,528 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 08:14:32,530 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 08:14:32,534 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 08:14:32,537 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 08:14:32,540 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 08:14:32,541 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 08:14:32,543 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 08:14:32,543 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 08:14:32,547 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 08:14:32,550 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 08:14:32,552 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 08:14:32,554 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 08:14:32,555 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 08:14:32,560 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 08:14:32,563 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 08:14:32,565 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 08:14:32,566 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 08:14:32,568 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 08:14:32,569 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 08:14:32,572 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 08:14:32,573 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 08:14:32,573 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 08:14:32,574 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 08:14:32,575 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 08:14:32,576 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 08:14:32,576 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 08:14:32,577 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 08:14:32,578 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 08:14:32,579 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 08:14:32,580 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 08:14:32,580 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 08:14:32,581 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 08:14:32,581 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 08:14:32,581 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 08:14:32,582 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 08:14:32,583 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 08:14:32,584 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc24f5a-06d0-4d59-ba3b-86cdbbb3d565/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-07 08:14:32,626 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 08:14:32,627 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 08:14:32,627 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 08:14:32,628 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 08:14:32,635 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 08:14:32,636 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 08:14:32,636 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 08:14:32,636 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 08:14:32,637 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 08:14:32,637 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 08:14:32,638 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 08:14:32,638 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 08:14:32,638 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 08:14:32,639 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 08:14:32,639 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 08:14:32,639 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 08:14:32,639 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 08:14:32,640 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 08:14:32,640 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 08:14:32,640 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 08:14:32,640 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 08:14:32,641 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 08:14:32,641 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:14:32,641 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 08:14:32,641 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 08:14:32,642 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 08:14:32,642 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 08:14:32,642 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 08:14:32,642 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 08:14:32,644 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 08:14:32,644 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 08:14:32,644 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 08:14:32,645 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_9cc24f5a-06d0-4d59-ba3b-86cdbbb3d565/bin/uautomizer-AkOaLMaTGY/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc24f5a-06d0-4d59-ba3b-86cdbbb3d565/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 388c926a79a6b5e7bef889b40d9a18e5c4aeb62f40be1f5a1ab2f0fe0344f6c1 [2021-11-07 08:14:32,919 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 08:14:32,944 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 08:14:32,948 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 08:14:32,949 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 08:14:32,950 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 08:14:32,951 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc24f5a-06d0-4d59-ba3b-86cdbbb3d565/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/array-examples/standard_init6_ground-2.i [2021-11-07 08:14:33,050 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc24f5a-06d0-4d59-ba3b-86cdbbb3d565/bin/uautomizer-AkOaLMaTGY/data/63b07a135/29c651f4f51048528a419e5ddb5b3ff6/FLAG76f776300 [2021-11-07 08:14:33,476 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 08:14:33,476 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc24f5a-06d0-4d59-ba3b-86cdbbb3d565/sv-benchmarks/c/array-examples/standard_init6_ground-2.i [2021-11-07 08:14:33,483 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc24f5a-06d0-4d59-ba3b-86cdbbb3d565/bin/uautomizer-AkOaLMaTGY/data/63b07a135/29c651f4f51048528a419e5ddb5b3ff6/FLAG76f776300 [2021-11-07 08:14:33,882 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc24f5a-06d0-4d59-ba3b-86cdbbb3d565/bin/uautomizer-AkOaLMaTGY/data/63b07a135/29c651f4f51048528a419e5ddb5b3ff6 [2021-11-07 08:14:33,885 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 08:14:33,887 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 08:14:33,889 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 08:14:33,889 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 08:14:33,893 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 08:14:33,894 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:14:33" (1/1) ... [2021-11-07 08:14:33,895 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@693b05b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:14:33, skipping insertion in model container [2021-11-07 08:14:33,896 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:14:33" (1/1) ... [2021-11-07 08:14:33,904 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 08:14:33,921 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 08:14:34,090 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_9cc24f5a-06d0-4d59-ba3b-86cdbbb3d565/sv-benchmarks/c/array-examples/standard_init6_ground-2.i[816,829] [2021-11-07 08:14:34,107 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:14:34,114 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 08:14:34,128 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_9cc24f5a-06d0-4d59-ba3b-86cdbbb3d565/sv-benchmarks/c/array-examples/standard_init6_ground-2.i[816,829] [2021-11-07 08:14:34,138 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:14:34,151 INFO L208 MainTranslator]: Completed translation [2021-11-07 08:14:34,152 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:14:34 WrapperNode [2021-11-07 08:14:34,152 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 08:14:34,153 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 08:14:34,153 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 08:14:34,153 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 08:14:34,160 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:14:34" (1/1) ... [2021-11-07 08:14:34,168 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:14:34" (1/1) ... [2021-11-07 08:14:34,192 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 08:14:34,193 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 08:14:34,194 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 08:14:34,194 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 08:14:34,202 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:14:34" (1/1) ... [2021-11-07 08:14:34,202 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:14:34" (1/1) ... [2021-11-07 08:14:34,205 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:14:34" (1/1) ... [2021-11-07 08:14:34,205 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:14:34" (1/1) ... [2021-11-07 08:14:34,212 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:14:34" (1/1) ... [2021-11-07 08:14:34,218 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:14:34" (1/1) ... [2021-11-07 08:14:34,219 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:14:34" (1/1) ... [2021-11-07 08:14:34,222 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 08:14:34,223 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 08:14:34,224 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 08:14:34,224 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 08:14:34,225 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:14:34" (1/1) ... [2021-11-07 08:14:34,234 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:14:34,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc24f5a-06d0-4d59-ba3b-86cdbbb3d565/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:14:34,255 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc24f5a-06d0-4d59-ba3b-86cdbbb3d565/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 08:14:34,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc24f5a-06d0-4d59-ba3b-86cdbbb3d565/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 08:14:34,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 08:14:34,293 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 08:14:34,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-07 08:14:34,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 08:14:34,294 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 08:14:34,294 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-07 08:14:34,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 08:14:34,574 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 08:14:34,574 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-11-07 08:14:34,576 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:14:34 BoogieIcfgContainer [2021-11-07 08:14:34,577 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 08:14:34,579 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 08:14:34,579 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 08:14:34,583 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 08:14:34,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:14:33" (1/3) ... [2021-11-07 08:14:34,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@385ef806 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:14:34, skipping insertion in model container [2021-11-07 08:14:34,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:14:34" (2/3) ... [2021-11-07 08:14:34,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@385ef806 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:14:34, skipping insertion in model container [2021-11-07 08:14:34,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:14:34" (3/3) ... [2021-11-07 08:14:34,586 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_init6_ground-2.i [2021-11-07 08:14:34,592 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 08:14:34,593 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 08:14:34,648 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 08:14:34,657 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 08:14:34,657 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 08:14:34,675 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:34,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 08:14:34,681 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:34,682 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:34,682 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:34,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:34,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1501159767, now seen corresponding path program 1 times [2021-11-07 08:14:34,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:34,698 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879070392] [2021-11-07 08:14:34,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:34,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:34,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:34,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:14:34,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:34,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879070392] [2021-11-07 08:14:34,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879070392] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:14:34,861 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:14:34,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:14:34,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843510304] [2021-11-07 08:14:34,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:14:34,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:34,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:14:34,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:14:34,885 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 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 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:34,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:34,994 INFO L93 Difference]: Finished difference Result 51 states and 89 transitions. [2021-11-07 08:14:34,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:14:34,996 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-07 08:14:34,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:35,006 INFO L225 Difference]: With dead ends: 51 [2021-11-07 08:14:35,012 INFO L226 Difference]: Without dead ends: 26 [2021-11-07 08:14:35,015 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:14:35,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-07 08:14:35,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-11-07 08:14:35,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.28) internal successors, (32), 25 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) [2021-11-07 08:14:35,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2021-11-07 08:14:35,062 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 17 [2021-11-07 08:14:35,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:35,063 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2021-11-07 08:14:35,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:35,064 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2021-11-07 08:14:35,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-07 08:14:35,065 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:35,065 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] [2021-11-07 08:14:35,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 08:14:35,066 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:35,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:35,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1833326096, now seen corresponding path program 1 times [2021-11-07 08:14:35,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:35,071 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292569945] [2021-11-07 08:14:35,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:35,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:35,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:35,167 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 08:14:35,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:35,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292569945] [2021-11-07 08:14:35,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292569945] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:35,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121220770] [2021-11-07 08:14:35,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:35,169 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:35,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc24f5a-06d0-4d59-ba3b-86cdbbb3d565/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:14:35,171 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc24f5a-06d0-4d59-ba3b-86cdbbb3d565/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:14:35,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc24f5a-06d0-4d59-ba3b-86cdbbb3d565/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 08:14:35,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:35,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 08:14:35,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:14:35,337 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 08:14:35,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121220770] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:35,338 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:14:35,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-11-07 08:14:35,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929926147] [2021-11-07 08:14:35,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:14:35,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:35,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:14:35,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:14:35,342 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:35,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:35,418 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2021-11-07 08:14:35,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:14:35,419 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-07 08:14:35,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:35,421 INFO L225 Difference]: With dead ends: 54 [2021-11-07 08:14:35,421 INFO L226 Difference]: Without dead ends: 32 [2021-11-07 08:14:35,422 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:14:35,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-07 08:14:35,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-11-07 08:14:35,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 31 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:35,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2021-11-07 08:14:35,431 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 23 [2021-11-07 08:14:35,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:35,431 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2021-11-07 08:14:35,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:35,432 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2021-11-07 08:14:35,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-07 08:14:35,434 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:35,434 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:35,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc24f5a-06d0-4d59-ba3b-86cdbbb3d565/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 08:14:35,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc24f5a-06d0-4d59-ba3b-86cdbbb3d565/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-11-07 08:14:35,656 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:35,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:35,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1605379405, now seen corresponding path program 2 times [2021-11-07 08:14:35,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:35,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993203821] [2021-11-07 08:14:35,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:35,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:35,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:35,801 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-07 08:14:35,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:35,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993203821] [2021-11-07 08:14:35,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993203821] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:35,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800942251] [2021-11-07 08:14:35,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:14:35,803 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:35,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc24f5a-06d0-4d59-ba3b-86cdbbb3d565/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:14:35,808 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc24f5a-06d0-4d59-ba3b-86cdbbb3d565/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:14:35,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc24f5a-06d0-4d59-ba3b-86cdbbb3d565/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 08:14:35,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:14:35,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:14:35,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 08:14:35,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:14:35,994 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-07 08:14:35,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800942251] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:35,995 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:14:35,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-11-07 08:14:35,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792973793] [2021-11-07 08:14:36,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:14:36,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:36,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:14:36,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:14:36,003 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:36,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:36,093 INFO L93 Difference]: Finished difference Result 65 states and 82 transitions. [2021-11-07 08:14:36,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 08:14:36,094 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-07 08:14:36,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:36,096 INFO L225 Difference]: With dead ends: 65 [2021-11-07 08:14:36,097 INFO L226 Difference]: Without dead ends: 38 [2021-11-07 08:14:36,098 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:14:36,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-07 08:14:36,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-11-07 08:14:36,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 37 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:36,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2021-11-07 08:14:36,122 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 29 [2021-11-07 08:14:36,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:36,122 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2021-11-07 08:14:36,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:36,123 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2021-11-07 08:14:36,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-07 08:14:36,125 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:36,126 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:36,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc24f5a-06d0-4d59-ba3b-86cdbbb3d565/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 08:14:36,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc24f5a-06d0-4d59-ba3b-86cdbbb3d565/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:36,347 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:36,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:36,348 INFO L85 PathProgramCache]: Analyzing trace with hash 777570992, now seen corresponding path program 3 times [2021-11-07 08:14:36,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:36,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753802792] [2021-11-07 08:14:36,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:36,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:36,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:36,485 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-07 08:14:36,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:36,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753802792] [2021-11-07 08:14:36,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753802792] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:36,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90701218] [2021-11-07 08:14:36,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:14:36,487 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:36,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc24f5a-06d0-4d59-ba3b-86cdbbb3d565/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:14:36,488 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc24f5a-06d0-4d59-ba3b-86cdbbb3d565/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:14:36,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc24f5a-06d0-4d59-ba3b-86cdbbb3d565/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 08:14:36,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-07 08:14:36,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:14:36,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 08:14:36,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:14:36,721 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-07 08:14:36,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90701218] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:36,722 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:14:36,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-11-07 08:14:36,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005357836] [2021-11-07 08:14:36,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 08:14:36,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:36,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 08:14:36,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:14:36,726 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:36,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:36,802 INFO L93 Difference]: Finished difference Result 76 states and 93 transitions. [2021-11-07 08:14:36,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:14:36,808 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 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 [2021-11-07 08:14:36,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:36,810 INFO L225 Difference]: With dead ends: 76 [2021-11-07 08:14:36,810 INFO L226 Difference]: Without dead ends: 44 [2021-11-07 08:14:36,811 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:14:36,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-07 08:14:36,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-11-07 08:14:36,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 43 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:36,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2021-11-07 08:14:36,829 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 35 [2021-11-07 08:14:36,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:36,830 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2021-11-07 08:14:36,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:36,830 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2021-11-07 08:14:36,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-07 08:14:36,832 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:36,832 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:36,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc24f5a-06d0-4d59-ba3b-86cdbbb3d565/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-07 08:14:37,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc24f5a-06d0-4d59-ba3b-86cdbbb3d565/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:37,033 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:37,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:37,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1875666669, now seen corresponding path program 4 times [2021-11-07 08:14:37,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:37,034 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983299703] [2021-11-07 08:14:37,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:37,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:37,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:37,112 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-07 08:14:37,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:37,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983299703] [2021-11-07 08:14:37,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983299703] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:37,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703430051] [2021-11-07 08:14:37,113 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:14:37,114 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:37,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc24f5a-06d0-4d59-ba3b-86cdbbb3d565/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:14:37,115 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc24f5a-06d0-4d59-ba3b-86cdbbb3d565/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:14:37,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc24f5a-06d0-4d59-ba3b-86cdbbb3d565/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 08:14:37,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:14:37,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:14:37,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 08:14:37,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:14:37,325 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-07 08:14:37,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703430051] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:37,332 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:14:37,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-11-07 08:14:37,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126885192] [2021-11-07 08:14:37,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 08:14:37,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:37,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 08:14:37,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:14:37,338 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:37,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:37,432 INFO L93 Difference]: Finished difference Result 87 states and 104 transitions. [2021-11-07 08:14:37,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 08:14:37,433 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 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 41 [2021-11-07 08:14:37,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:37,434 INFO L225 Difference]: With dead ends: 87 [2021-11-07 08:14:37,434 INFO L226 Difference]: Without dead ends: 50 [2021-11-07 08:14:37,435 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:14:37,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-07 08:14:37,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-11-07 08:14:37,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:37,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2021-11-07 08:14:37,440 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 41 [2021-11-07 08:14:37,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:37,441 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2021-11-07 08:14:37,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:37,441 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2021-11-07 08:14:37,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-07 08:14:37,443 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:37,443 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:37,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc24f5a-06d0-4d59-ba3b-86cdbbb3d565/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-07 08:14:37,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc24f5a-06d0-4d59-ba3b-86cdbbb3d565/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:37,664 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:37,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:37,664 INFO L85 PathProgramCache]: Analyzing trace with hash 742123344, now seen corresponding path program 5 times [2021-11-07 08:14:37,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:37,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988804724] [2021-11-07 08:14:37,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:37,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:37,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:37,765 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-07 08:14:37,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:37,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988804724] [2021-11-07 08:14:37,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988804724] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:37,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771080086] [2021-11-07 08:14:37,766 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:14:37,766 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:37,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc24f5a-06d0-4d59-ba3b-86cdbbb3d565/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:14:37,767 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc24f5a-06d0-4d59-ba3b-86cdbbb3d565/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:14:37,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc24f5a-06d0-4d59-ba3b-86cdbbb3d565/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 08:14:43,769 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-07 08:14:43,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:14:43,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 08:14:43,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:14:43,891 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-07 08:14:43,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771080086] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:43,891 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:14:43,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-11-07 08:14:43,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853017027] [2021-11-07 08:14:43,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 08:14:43,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:43,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 08:14:43,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-07 08:14:43,894 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:43,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:43,983 INFO L93 Difference]: Finished difference Result 98 states and 115 transitions. [2021-11-07 08:14:43,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 08:14:43,984 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 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 47 [2021-11-07 08:14:43,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:43,987 INFO L225 Difference]: With dead ends: 98 [2021-11-07 08:14:43,988 INFO L226 Difference]: Without dead ends: 56 [2021-11-07 08:14:43,988 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-07 08:14:43,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-07 08:14:43,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-11-07 08:14:43,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 55 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:44,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2021-11-07 08:14:44,001 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 47 [2021-11-07 08:14:44,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:44,001 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2021-11-07 08:14:44,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:44,001 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2021-11-07 08:14:44,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 08:14:44,008 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:44,008 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:44,039 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc24f5a-06d0-4d59-ba3b-86cdbbb3d565/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-07 08:14:44,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc24f5a-06d0-4d59-ba3b-86cdbbb3d565/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-07 08:14:44,227 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:44,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:44,227 INFO L85 PathProgramCache]: Analyzing trace with hash 786050931, now seen corresponding path program 6 times [2021-11-07 08:14:44,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:44,228 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679337051] [2021-11-07 08:14:44,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:44,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:44,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:44,314 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-07 08:14:44,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:44,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679337051] [2021-11-07 08:14:44,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679337051] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:44,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436760749] [2021-11-07 08:14:44,315 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:14:44,315 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:44,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc24f5a-06d0-4d59-ba3b-86cdbbb3d565/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:14:44,316 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc24f5a-06d0-4d59-ba3b-86cdbbb3d565/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:14:44,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc24f5a-06d0-4d59-ba3b-86cdbbb3d565/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-07 08:14:45,123 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-07 08:14:45,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:14:45,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 08:14:45,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:14:45,271 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-07 08:14:45,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436760749] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:45,272 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:14:45,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-11-07 08:14:45,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807255989] [2021-11-07 08:14:45,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 08:14:45,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:45,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 08:14:45,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-11-07 08:14:45,276 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 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) [2021-11-07 08:14:45,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:45,391 INFO L93 Difference]: Finished difference Result 109 states and 126 transitions. [2021-11-07 08:14:45,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 08:14:45,391 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 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 53 [2021-11-07 08:14:45,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:45,392 INFO L225 Difference]: With dead ends: 109 [2021-11-07 08:14:45,393 INFO L226 Difference]: Without dead ends: 62 [2021-11-07 08:14:45,393 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-11-07 08:14:45,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-07 08:14:45,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-11-07 08:14:45,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.1147540983606556) internal successors, (68), 61 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:45,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2021-11-07 08:14:45,400 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 53 [2021-11-07 08:14:45,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:45,400 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2021-11-07 08:14:45,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 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) [2021-11-07 08:14:45,400 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2021-11-07 08:14:45,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-07 08:14:45,401 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:45,401 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:45,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc24f5a-06d0-4d59-ba3b-86cdbbb3d565/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-07 08:14:45,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc24f5a-06d0-4d59-ba3b-86cdbbb3d565/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:45,628 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:45,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:45,629 INFO L85 PathProgramCache]: Analyzing trace with hash 518106096, now seen corresponding path program 7 times [2021-11-07 08:14:45,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:45,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842736549] [2021-11-07 08:14:45,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:45,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:45,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:45,740 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-11-07 08:14:45,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:45,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842736549] [2021-11-07 08:14:45,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842736549] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:45,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520561424] [2021-11-07 08:14:45,741 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:14:45,741 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:45,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc24f5a-06d0-4d59-ba3b-86cdbbb3d565/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:14:45,744 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc24f5a-06d0-4d59-ba3b-86cdbbb3d565/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:14:45,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc24f5a-06d0-4d59-ba3b-86cdbbb3d565/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-07 08:14:45,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:45,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 08:14:45,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:14:46,042 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-11-07 08:14:46,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520561424] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:46,043 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:14:46,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-11-07 08:14:46,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991748765] [2021-11-07 08:14:46,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 08:14:46,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:46,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 08:14:46,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-11-07 08:14:46,045 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 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) [2021-11-07 08:14:46,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:46,192 INFO L93 Difference]: Finished difference Result 120 states and 137 transitions. [2021-11-07 08:14:46,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 08:14:46,193 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 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 59 [2021-11-07 08:14:46,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:46,194 INFO L225 Difference]: With dead ends: 120 [2021-11-07 08:14:46,194 INFO L226 Difference]: Without dead ends: 68 [2021-11-07 08:14:46,195 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-11-07 08:14:46,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-07 08:14:46,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-11-07 08:14:46,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.1044776119402986) internal successors, (74), 67 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:46,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2021-11-07 08:14:46,204 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 59 [2021-11-07 08:14:46,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:46,204 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2021-11-07 08:14:46,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 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) [2021-11-07 08:14:46,205 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2021-11-07 08:14:46,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 08:14:46,206 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:46,206 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:46,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc24f5a-06d0-4d59-ba3b-86cdbbb3d565/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-07 08:14:46,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc24f5a-06d0-4d59-ba3b-86cdbbb3d565/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:46,422 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:46,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:46,422 INFO L85 PathProgramCache]: Analyzing trace with hash -820929069, now seen corresponding path program 8 times [2021-11-07 08:14:46,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:46,422 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290101303] [2021-11-07 08:14:46,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:46,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:46,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:46,560 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-11-07 08:14:46,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:46,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290101303] [2021-11-07 08:14:46,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290101303] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:46,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252535389] [2021-11-07 08:14:46,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:14:46,561 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:46,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc24f5a-06d0-4d59-ba3b-86cdbbb3d565/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:14:46,571 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc24f5a-06d0-4d59-ba3b-86cdbbb3d565/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:14:46,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc24f5a-06d0-4d59-ba3b-86cdbbb3d565/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-07 08:14:46,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:14:46,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:14:46,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 08:14:46,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:14:46,892 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-11-07 08:14:46,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252535389] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:46,893 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:14:46,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-11-07 08:14:46,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969766968] [2021-11-07 08:14:46,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 08:14:46,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:46,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 08:14:46,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-07 08:14:46,895 INFO L87 Difference]: Start difference. First operand 68 states and 74 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 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) [2021-11-07 08:14:47,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:47,029 INFO L93 Difference]: Finished difference Result 131 states and 148 transitions. [2021-11-07 08:14:47,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 08:14:47,030 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 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 65 [2021-11-07 08:14:47,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:47,031 INFO L225 Difference]: With dead ends: 131 [2021-11-07 08:14:47,031 INFO L226 Difference]: Without dead ends: 74 [2021-11-07 08:14:47,032 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-07 08:14:47,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-07 08:14:47,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-11-07 08:14:47,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.095890410958904) internal successors, (80), 73 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:47,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 80 transitions. [2021-11-07 08:14:47,039 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 80 transitions. Word has length 65 [2021-11-07 08:14:47,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:47,039 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 80 transitions. [2021-11-07 08:14:47,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 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) [2021-11-07 08:14:47,040 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 80 transitions. [2021-11-07 08:14:47,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 08:14:47,041 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:47,041 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:47,078 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc24f5a-06d0-4d59-ba3b-86cdbbb3d565/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-07 08:14:47,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc24f5a-06d0-4d59-ba3b-86cdbbb3d565/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-07 08:14:47,264 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:47,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:47,265 INFO L85 PathProgramCache]: Analyzing trace with hash 884742288, now seen corresponding path program 9 times [2021-11-07 08:14:47,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:47,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042144996] [2021-11-07 08:14:47,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:47,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:47,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:47,391 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-11-07 08:14:47,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:47,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042144996] [2021-11-07 08:14:47,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042144996] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:47,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014246855] [2021-11-07 08:14:47,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:14:47,392 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:47,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc24f5a-06d0-4d59-ba3b-86cdbbb3d565/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:14:47,394 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc24f5a-06d0-4d59-ba3b-86cdbbb3d565/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:14:47,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc24f5a-06d0-4d59-ba3b-86cdbbb3d565/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-07 08:14:52,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-07 08:14:52,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:14:52,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 08:14:52,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:14:52,596 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-11-07 08:14:52,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014246855] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:52,596 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:14:52,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-11-07 08:14:52,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050131363] [2021-11-07 08:14:52,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 08:14:52,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:52,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 08:14:52,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-07 08:14:52,600 INFO L87 Difference]: Start difference. First operand 74 states and 80 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:52,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:52,738 INFO L93 Difference]: Finished difference Result 142 states and 159 transitions. [2021-11-07 08:14:52,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 08:14:52,739 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 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 71 [2021-11-07 08:14:52,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:52,740 INFO L225 Difference]: With dead ends: 142 [2021-11-07 08:14:52,740 INFO L226 Difference]: Without dead ends: 80 [2021-11-07 08:14:52,744 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-07 08:14:52,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-07 08:14:52,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-11-07 08:14:52,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.0886075949367089) internal successors, (86), 79 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:52,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 86 transitions. [2021-11-07 08:14:52,769 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 86 transitions. Word has length 71 [2021-11-07 08:14:52,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:52,769 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 86 transitions. [2021-11-07 08:14:52,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:52,770 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 86 transitions. [2021-11-07 08:14:52,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 08:14:52,770 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:52,771 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:52,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc24f5a-06d0-4d59-ba3b-86cdbbb3d565/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-07 08:14:52,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc24f5a-06d0-4d59-ba3b-86cdbbb3d565/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-07 08:14:52,971 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:52,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:52,972 INFO L85 PathProgramCache]: Analyzing trace with hash 489153587, now seen corresponding path program 10 times [2021-11-07 08:14:52,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:52,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790889951] [2021-11-07 08:14:52,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:52,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:53,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:53,140 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2021-11-07 08:14:53,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:53,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790889951] [2021-11-07 08:14:53,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790889951] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:53,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035940126] [2021-11-07 08:14:53,141 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:14:53,141 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:53,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc24f5a-06d0-4d59-ba3b-86cdbbb3d565/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:14:53,142 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc24f5a-06d0-4d59-ba3b-86cdbbb3d565/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:14:53,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc24f5a-06d0-4d59-ba3b-86cdbbb3d565/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-07 08:14:53,344 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:14:53,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:14:53,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 08:14:53,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:14:53,545 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2021-11-07 08:14:53,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035940126] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:53,545 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:14:53,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-11-07 08:14:53,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287969794] [2021-11-07 08:14:53,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 08:14:53,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:53,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 08:14:53,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-11-07 08:14:53,547 INFO L87 Difference]: Start difference. First operand 80 states and 86 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:53,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:53,705 INFO L93 Difference]: Finished difference Result 153 states and 170 transitions. [2021-11-07 08:14:53,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 08:14:53,706 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-07 08:14:53,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:53,707 INFO L225 Difference]: With dead ends: 153 [2021-11-07 08:14:53,707 INFO L226 Difference]: Without dead ends: 86 [2021-11-07 08:14:53,707 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-11-07 08:14:53,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-07 08:14:53,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-11-07 08:14:53,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.0823529411764705) internal successors, (92), 85 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:53,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 92 transitions. [2021-11-07 08:14:53,715 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 92 transitions. Word has length 77 [2021-11-07 08:14:53,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:53,715 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 92 transitions. [2021-11-07 08:14:53,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:53,716 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 92 transitions. [2021-11-07 08:14:53,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-07 08:14:53,716 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:53,717 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:53,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc24f5a-06d0-4d59-ba3b-86cdbbb3d565/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-07 08:14:53,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc24f5a-06d0-4d59-ba3b-86cdbbb3d565/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-07 08:14:53,934 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:53,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:53,934 INFO L85 PathProgramCache]: Analyzing trace with hash 851258672, now seen corresponding path program 11 times [2021-11-07 08:14:53,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:53,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089469167] [2021-11-07 08:14:53,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:53,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:53,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:54,070 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2021-11-07 08:14:54,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:54,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089469167] [2021-11-07 08:14:54,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089469167] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:54,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954538150] [2021-11-07 08:14:54,071 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:14:54,071 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:54,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc24f5a-06d0-4d59-ba3b-86cdbbb3d565/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:14:54,072 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc24f5a-06d0-4d59-ba3b-86cdbbb3d565/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:14:54,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc24f5a-06d0-4d59-ba3b-86cdbbb3d565/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process