./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-programs/copysome1-2.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_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/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_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-programs/copysome1-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/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_0eb05431-a25b-454a-8e98-7d65162859b3/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 fba7b7c813943ca4d863bf010df4d3f1a074ecd1ac1791c737a4b5fb8e2d7ea1 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 07:41:52,117 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 07:41:52,120 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 07:41:52,156 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 07:41:52,157 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 07:41:52,158 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 07:41:52,160 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 07:41:52,163 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 07:41:52,165 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 07:41:52,166 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 07:41:52,167 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 07:41:52,169 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 07:41:52,170 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 07:41:52,171 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 07:41:52,173 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 07:41:52,175 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 07:41:52,176 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 07:41:52,177 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 07:41:52,180 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 07:41:52,182 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 07:41:52,193 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 07:41:52,196 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 07:41:52,198 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 07:41:52,199 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 07:41:52,203 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 07:41:52,203 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 07:41:52,204 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 07:41:52,205 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 07:41:52,206 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 07:41:52,207 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 07:41:52,207 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 07:41:52,208 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 07:41:52,209 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 07:41:52,210 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 07:41:52,212 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 07:41:52,212 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 07:41:52,213 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 07:41:52,214 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 07:41:52,214 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 07:41:52,215 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 07:41:52,224 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 07:41:52,225 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-07 07:41:52,252 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 07:41:52,252 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 07:41:52,253 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 07:41:52,253 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 07:41:52,254 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 07:41:52,254 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 07:41:52,254 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 07:41:52,255 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 07:41:52,255 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 07:41:52,255 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 07:41:52,255 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 07:41:52,255 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 07:41:52,255 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 07:41:52,256 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 07:41:52,256 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 07:41:52,256 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 07:41:52,256 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 07:41:52,256 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 07:41:52,257 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 07:41:52,257 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 07:41:52,257 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 07:41:52,257 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 07:41:52,257 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:41:52,258 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 07:41:52,258 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 07:41:52,258 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 07:41:52,258 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 07:41:52,258 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 07:41:52,259 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 07:41:52,259 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 07:41:52,259 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 07:41:52,259 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 07:41:52,259 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_0eb05431-a25b-454a-8e98-7d65162859b3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fba7b7c813943ca4d863bf010df4d3f1a074ecd1ac1791c737a4b5fb8e2d7ea1 [2021-11-07 07:41:52,499 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 07:41:52,545 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 07:41:52,548 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 07:41:52,550 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 07:41:52,551 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 07:41:52,552 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/array-programs/copysome1-2.i [2021-11-07 07:41:52,633 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/data/8fbd57fd4/11558608b6fc494ea6e0f6223a247b3a/FLAG7d9c9252d [2021-11-07 07:41:53,072 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 07:41:53,073 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/sv-benchmarks/c/array-programs/copysome1-2.i [2021-11-07 07:41:53,088 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/data/8fbd57fd4/11558608b6fc494ea6e0f6223a247b3a/FLAG7d9c9252d [2021-11-07 07:41:53,456 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/data/8fbd57fd4/11558608b6fc494ea6e0f6223a247b3a [2021-11-07 07:41:53,458 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 07:41:53,459 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 07:41:53,464 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 07:41:53,464 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 07:41:53,468 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 07:41:53,469 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:41:53" (1/1) ... [2021-11-07 07:41:53,470 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@469e4093 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:41:53, skipping insertion in model container [2021-11-07 07:41:53,471 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:41:53" (1/1) ... [2021-11-07 07:41:53,478 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 07:41:53,496 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 07:41:53,613 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_0eb05431-a25b-454a-8e98-7d65162859b3/sv-benchmarks/c/array-programs/copysome1-2.i[805,818] [2021-11-07 07:41:53,627 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:41:53,633 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 07:41:53,645 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_0eb05431-a25b-454a-8e98-7d65162859b3/sv-benchmarks/c/array-programs/copysome1-2.i[805,818] [2021-11-07 07:41:53,652 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:41:53,666 INFO L208 MainTranslator]: Completed translation [2021-11-07 07:41:53,666 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:41:53 WrapperNode [2021-11-07 07:41:53,666 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 07:41:53,667 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 07:41:53,667 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 07:41:53,668 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 07:41:53,673 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:41:53" (1/1) ... [2021-11-07 07:41:53,680 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:41:53" (1/1) ... [2021-11-07 07:41:53,700 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 07:41:53,701 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 07:41:53,701 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 07:41:53,701 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 07:41:53,710 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:41:53" (1/1) ... [2021-11-07 07:41:53,710 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:41:53" (1/1) ... [2021-11-07 07:41:53,712 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:41:53" (1/1) ... [2021-11-07 07:41:53,712 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:41:53" (1/1) ... [2021-11-07 07:41:53,718 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:41:53" (1/1) ... [2021-11-07 07:41:53,722 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:41:53" (1/1) ... [2021-11-07 07:41:53,723 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:41:53" (1/1) ... [2021-11-07 07:41:53,725 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 07:41:53,726 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 07:41:53,726 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 07:41:53,726 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 07:41:53,727 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:41:53" (1/1) ... [2021-11-07 07:41:53,735 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:41:53,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:41:53,762 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 07:41:53,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 07:41:53,807 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 07:41:53,807 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 07:41:53,807 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-07 07:41:53,807 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 07:41:53,807 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 07:41:53,807 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-07 07:41:53,807 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 07:41:54,036 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 07:41:54,037 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-11-07 07:41:54,038 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:41:54 BoogieIcfgContainer [2021-11-07 07:41:54,039 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 07:41:54,041 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 07:41:54,041 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 07:41:54,044 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 07:41:54,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 07:41:53" (1/3) ... [2021-11-07 07:41:54,045 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ff7888 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:41:54, skipping insertion in model container [2021-11-07 07:41:54,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:41:53" (2/3) ... [2021-11-07 07:41:54,046 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ff7888 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:41:54, skipping insertion in model container [2021-11-07 07:41:54,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:41:54" (3/3) ... [2021-11-07 07:41:54,048 INFO L111 eAbstractionObserver]: Analyzing ICFG copysome1-2.i [2021-11-07 07:41:54,053 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 07:41:54,054 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 07:41:54,103 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 07:41:54,110 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 07:41:54,111 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 07:41:54,126 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 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 07:41:54,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-07 07:41:54,132 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:41:54,133 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:41:54,134 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:41:54,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:41:54,140 INFO L85 PathProgramCache]: Analyzing trace with hash -2060710478, now seen corresponding path program 1 times [2021-11-07 07:41:54,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:41:54,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778693436] [2021-11-07 07:41:54,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:41:54,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:41:54,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:41:54,377 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 07:41:54,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:41:54,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778693436] [2021-11-07 07:41:54,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778693436] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:41:54,380 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:41:54,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:41:54,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239883491] [2021-11-07 07:41:54,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:41:54,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:41:54,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:41:54,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:41:54,406 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 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) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:41:54,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:41:54,492 INFO L93 Difference]: Finished difference Result 41 states and 60 transitions. [2021-11-07 07:41:54,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:41:54,494 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-07 07:41:54,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:41:54,506 INFO L225 Difference]: With dead ends: 41 [2021-11-07 07:41:54,506 INFO L226 Difference]: Without dead ends: 21 [2021-11-07 07:41:54,512 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 07:41:54,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-07 07:41:54,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2021-11-07 07:41:54,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 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 07:41:54,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2021-11-07 07:41:54,559 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 10 [2021-11-07 07:41:54,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:41:54,561 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2021-11-07 07:41:54,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:41:54,562 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2021-11-07 07:41:54,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-07 07:41:54,563 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:41:54,564 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:41:54,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 07:41:54,565 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:41:54,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:41:54,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1458340319, now seen corresponding path program 1 times [2021-11-07 07:41:54,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:41:54,575 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402289118] [2021-11-07 07:41:54,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:41:54,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:41:54,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:41:54,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 07:41:54,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:41:54,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402289118] [2021-11-07 07:41:54,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402289118] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:41:54,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850298792] [2021-11-07 07:41:54,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:41:54,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:41:54,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:41:54,710 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:41:54,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 07:41:54,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:41:54,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 07:41:54,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:41:54,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 07:41:54,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850298792] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:41:54,883 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:41:54,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-11-07 07:41:54,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106055906] [2021-11-07 07:41:54,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:41:54,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:41:54,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:41:54,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:41:54,887 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 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 07:41:54,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:41:54,942 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2021-11-07 07:41:54,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 07:41:54,943 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 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 15 [2021-11-07 07:41:54,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:41:54,945 INFO L225 Difference]: With dead ends: 39 [2021-11-07 07:41:54,946 INFO L226 Difference]: Without dead ends: 26 [2021-11-07 07:41:54,947 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 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 07:41:54,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-07 07:41:54,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2021-11-07 07:41:54,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 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 07:41:54,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2021-11-07 07:41:54,957 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 15 [2021-11-07 07:41:54,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:41:54,958 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2021-11-07 07:41:54,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 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 07:41:54,959 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2021-11-07 07:41:54,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-07 07:41:54,963 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:41:54,964 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:41:54,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 07:41:55,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:41:55,177 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:41:55,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:41:55,178 INFO L85 PathProgramCache]: Analyzing trace with hash -2030845279, now seen corresponding path program 2 times [2021-11-07 07:41:55,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:41:55,178 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937597790] [2021-11-07 07:41:55,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:41:55,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:41:55,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:41:55,270 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 07:41:55,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:41:55,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937597790] [2021-11-07 07:41:55,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937597790] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:41:55,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776789439] [2021-11-07 07:41:55,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:41:55,272 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:41:55,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:41:55,274 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:41:55,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 07:41:55,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:41:55,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:41:55,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 07:41:55,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:41:55,456 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 07:41:55,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776789439] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:41:55,457 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:41:55,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-11-07 07:41:55,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103483575] [2021-11-07 07:41:55,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 07:41:55,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:41:55,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 07:41:55,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:41:55,466 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:41:55,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:41:55,531 INFO L93 Difference]: Finished difference Result 47 states and 60 transitions. [2021-11-07 07:41:55,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 07:41:55,532 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-07 07:41:55,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:41:55,533 INFO L225 Difference]: With dead ends: 47 [2021-11-07 07:41:55,533 INFO L226 Difference]: Without dead ends: 31 [2021-11-07 07:41:55,534 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 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 07:41:55,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-07 07:41:55,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2021-11-07 07:41:55,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 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 07:41:55,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2021-11-07 07:41:55,544 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 20 [2021-11-07 07:41:55,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:41:55,545 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2021-11-07 07:41:55,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:41:55,545 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2021-11-07 07:41:55,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-07 07:41:55,547 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:41:55,547 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:41:55,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 07:41:55,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:41:55,773 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:41:55,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:41:55,773 INFO L85 PathProgramCache]: Analyzing trace with hash -224231843, now seen corresponding path program 3 times [2021-11-07 07:41:55,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:41:55,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297140770] [2021-11-07 07:41:55,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:41:55,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:41:55,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:41:55,873 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 07:41:55,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:41:55,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297140770] [2021-11-07 07:41:55,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297140770] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:41:55,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583314959] [2021-11-07 07:41:55,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:41:55,875 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:41:55,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:41:55,878 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:41:55,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 07:41:55,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-07 07:41:55,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:41:55,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 07:41:55,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:41:56,062 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 07:41:56,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583314959] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:41:56,063 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:41:56,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-11-07 07:41:56,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073815192] [2021-11-07 07:41:56,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 07:41:56,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:41:56,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 07:41:56,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:41:56,067 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 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 07:41:56,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:41:56,139 INFO L93 Difference]: Finished difference Result 55 states and 70 transitions. [2021-11-07 07:41:56,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 07:41:56,140 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-07 07:41:56,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:41:56,141 INFO L225 Difference]: With dead ends: 55 [2021-11-07 07:41:56,141 INFO L226 Difference]: Without dead ends: 36 [2021-11-07 07:41:56,142 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 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 07:41:56,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-07 07:41:56,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2021-11-07 07:41:56,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.25) internal successors, (40), 32 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 07:41:56,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2021-11-07 07:41:56,148 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 25 [2021-11-07 07:41:56,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:41:56,148 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2021-11-07 07:41:56,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 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 07:41:56,149 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2021-11-07 07:41:56,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-07 07:41:56,150 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:41:56,150 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:41:56,183 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-07 07:41:56,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:41:56,373 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:41:56,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:41:56,373 INFO L85 PathProgramCache]: Analyzing trace with hash -736833947, now seen corresponding path program 4 times [2021-11-07 07:41:56,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:41:56,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289440807] [2021-11-07 07:41:56,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:41:56,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:41:56,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:41:56,481 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-07 07:41:56,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:41:56,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289440807] [2021-11-07 07:41:56,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289440807] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:41:56,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527675973] [2021-11-07 07:41:56,483 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:41:56,483 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:41:56,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:41:56,492 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:41:56,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 07:41:56,579 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:41:56,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:41:56,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 07:41:56,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:41:56,677 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-07 07:41:56,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527675973] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:41:56,682 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:41:56,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-11-07 07:41:56,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810150464] [2021-11-07 07:41:56,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 07:41:56,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:41:56,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 07:41:56,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-07 07:41:56,689 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:41:56,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:41:56,753 INFO L93 Difference]: Finished difference Result 63 states and 80 transitions. [2021-11-07 07:41:56,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 07:41:56,754 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-07 07:41:56,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:41:56,757 INFO L225 Difference]: With dead ends: 63 [2021-11-07 07:41:56,757 INFO L226 Difference]: Without dead ends: 41 [2021-11-07 07:41:56,758 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 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 07:41:56,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-07 07:41:56,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2021-11-07 07:41:56,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 37 states have internal predecessors, (46), 0 states have call successors, (0), 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 07:41:56,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2021-11-07 07:41:56,771 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 30 [2021-11-07 07:41:56,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:41:56,772 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2021-11-07 07:41:56,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:41:56,774 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2021-11-07 07:41:56,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-07 07:41:56,776 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:41:56,776 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:41:56,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-07 07:41:56,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:41:56,999 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:41:57,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:41:57,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1407538841, now seen corresponding path program 5 times [2021-11-07 07:41:57,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:41:57,000 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744016183] [2021-11-07 07:41:57,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:41:57,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:41:57,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:41:57,123 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-07 07:41:57,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:41:57,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744016183] [2021-11-07 07:41:57,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744016183] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:41:57,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725451739] [2021-11-07 07:41:57,125 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:41:57,125 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:41:57,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:41:57,126 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:41:57,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 07:41:57,459 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-07 07:41:57,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:41:57,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 07:41:57,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:41:57,555 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-07 07:41:57,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725451739] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:41:57,556 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:41:57,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-11-07 07:41:57,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414678300] [2021-11-07 07:41:57,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 07:41:57,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:41:57,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 07:41:57,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-07 07:41:57,558 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 07:41:57,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:41:57,632 INFO L93 Difference]: Finished difference Result 71 states and 90 transitions. [2021-11-07 07:41:57,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 07:41:57,633 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 35 [2021-11-07 07:41:57,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:41:57,636 INFO L225 Difference]: With dead ends: 71 [2021-11-07 07:41:57,636 INFO L226 Difference]: Without dead ends: 46 [2021-11-07 07:41:57,637 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 35 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 07:41:57,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-07 07:41:57,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2021-11-07 07:41:57,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 42 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:41:57,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2021-11-07 07:41:57,647 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 35 [2021-11-07 07:41:57,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:41:57,648 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2021-11-07 07:41:57,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 07:41:57,648 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2021-11-07 07:41:57,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-07 07:41:57,651 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:41:57,652 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:41:57,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-07 07:41:57,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:41:57,868 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:41:57,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:41:57,868 INFO L85 PathProgramCache]: Analyzing trace with hash 968499753, now seen corresponding path program 6 times [2021-11-07 07:41:57,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:41:57,868 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599585843] [2021-11-07 07:41:57,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:41:57,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:41:57,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:41:57,986 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-07 07:41:57,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:41:57,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599585843] [2021-11-07 07:41:57,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599585843] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:41:57,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456951388] [2021-11-07 07:41:57,990 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:41:57,990 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:41:57,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:41:57,996 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:41:58,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-07 07:41:58,239 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-07 07:41:58,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:41:58,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 07:41:58,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:41:58,366 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-07 07:41:58,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456951388] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:41:58,367 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:41:58,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-11-07 07:41:58,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382598832] [2021-11-07 07:41:58,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 07:41:58,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:41:58,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 07:41:58,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-11-07 07:41:58,369 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 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 07:41:58,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:41:58,453 INFO L93 Difference]: Finished difference Result 79 states and 100 transitions. [2021-11-07 07:41:58,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 07:41:58,454 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 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 40 [2021-11-07 07:41:58,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:41:58,454 INFO L225 Difference]: With dead ends: 79 [2021-11-07 07:41:58,455 INFO L226 Difference]: Without dead ends: 51 [2021-11-07 07:41:58,455 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 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 07:41:58,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-07 07:41:58,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2021-11-07 07:41:58,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 47 states have internal predecessors, (58), 0 states have call successors, (0), 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 07:41:58,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2021-11-07 07:41:58,463 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 40 [2021-11-07 07:41:58,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:41:58,463 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2021-11-07 07:41:58,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 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 07:41:58,463 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2021-11-07 07:41:58,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 07:41:58,464 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:41:58,464 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:41:58,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-07 07:41:58,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:41:58,673 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:41:58,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:41:58,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1016346923, now seen corresponding path program 7 times [2021-11-07 07:41:58,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:41:58,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191139499] [2021-11-07 07:41:58,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:41:58,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:41:58,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:41:58,830 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-07 07:41:58,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:41:58,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191139499] [2021-11-07 07:41:58,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191139499] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:41:58,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341054709] [2021-11-07 07:41:58,831 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:41:58,831 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:41:58,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:41:58,837 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:41:58,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-07 07:41:58,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:41:58,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 07:41:58,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:41:59,087 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-07 07:41:59,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341054709] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:41:59,087 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:41:59,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-11-07 07:41:59,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735108259] [2021-11-07 07:41:59,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 07:41:59,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:41:59,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 07:41:59,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-11-07 07:41:59,089 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 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 07:41:59,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:41:59,181 INFO L93 Difference]: Finished difference Result 87 states and 110 transitions. [2021-11-07 07:41:59,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 07:41:59,182 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 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 45 [2021-11-07 07:41:59,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:41:59,183 INFO L225 Difference]: With dead ends: 87 [2021-11-07 07:41:59,183 INFO L226 Difference]: Without dead ends: 56 [2021-11-07 07:41:59,184 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 45 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 07:41:59,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-07 07:41:59,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2021-11-07 07:41:59,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.2307692307692308) internal successors, (64), 52 states have internal predecessors, (64), 0 states have call successors, (0), 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 07:41:59,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2021-11-07 07:41:59,189 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 45 [2021-11-07 07:41:59,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:41:59,189 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2021-11-07 07:41:59,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 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 07:41:59,189 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2021-11-07 07:41:59,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-07 07:41:59,190 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:41:59,190 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:41:59,218 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-07 07:41:59,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:41:59,405 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:41:59,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:41:59,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1143734803, now seen corresponding path program 8 times [2021-11-07 07:41:59,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:41:59,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784627264] [2021-11-07 07:41:59,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:41:59,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:41:59,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:41:59,510 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-07 07:41:59,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:41:59,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784627264] [2021-11-07 07:41:59,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784627264] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:41:59,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419764873] [2021-11-07 07:41:59,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:41:59,511 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:41:59,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:41:59,512 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:41:59,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-07 07:41:59,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:41:59,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:41:59,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 07:41:59,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:41:59,782 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-07 07:41:59,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419764873] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:41:59,783 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:41:59,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-11-07 07:41:59,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106480551] [2021-11-07 07:41:59,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 07:41:59,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:41:59,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 07:41:59,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-07 07:41:59,787 INFO L87 Difference]: Start difference. First operand 53 states and 64 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 07:41:59,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:41:59,895 INFO L93 Difference]: Finished difference Result 95 states and 120 transitions. [2021-11-07 07:41:59,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 07:41:59,896 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 50 [2021-11-07 07:41:59,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:41:59,898 INFO L225 Difference]: With dead ends: 95 [2021-11-07 07:41:59,898 INFO L226 Difference]: Without dead ends: 61 [2021-11-07 07:41:59,899 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 50 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 07:41:59,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-11-07 07:41:59,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2021-11-07 07:41:59,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.2280701754385965) internal successors, (70), 57 states have internal predecessors, (70), 0 states have call successors, (0), 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 07:41:59,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2021-11-07 07:41:59,914 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 50 [2021-11-07 07:41:59,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:41:59,914 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2021-11-07 07:41:59,914 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 07:41:59,915 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2021-11-07 07:41:59,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 07:41:59,917 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:41:59,917 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:41:59,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-07 07:42:00,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:42:00,133 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:42:00,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:42:00,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1908772625, now seen corresponding path program 9 times [2021-11-07 07:42:00,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:42:00,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518852457] [2021-11-07 07:42:00,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:42:00,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:42:00,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:42:00,262 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-11-07 07:42:00,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:42:00,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518852457] [2021-11-07 07:42:00,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518852457] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:42:00,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19539487] [2021-11-07 07:42:00,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:42:00,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:42:00,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:42:00,265 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:42:00,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-07 07:42:02,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-11-07 07:42:02,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:42:02,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 07:42:02,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:42:02,751 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-11-07 07:42:02,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19539487] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:42:02,752 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:42:02,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-11-07 07:42:02,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667880395] [2021-11-07 07:42:02,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 07:42:02,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:42:02,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 07:42:02,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-07 07:42:02,754 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 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 07:42:02,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:42:02,853 INFO L93 Difference]: Finished difference Result 103 states and 130 transitions. [2021-11-07 07:42:02,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 07:42:02,854 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 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 55 [2021-11-07 07:42:02,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:42:02,854 INFO L225 Difference]: With dead ends: 103 [2021-11-07 07:42:02,855 INFO L226 Difference]: Without dead ends: 66 [2021-11-07 07:42:02,855 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 55 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 07:42:02,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-07 07:42:02,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2021-11-07 07:42:02,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.2258064516129032) internal successors, (76), 62 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:02,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2021-11-07 07:42:02,861 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 55 [2021-11-07 07:42:02,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:42:02,861 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2021-11-07 07:42:02,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 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 07:42:02,862 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2021-11-07 07:42:02,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 07:42:02,863 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:42:02,863 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:42:02,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-07 07:42:03,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:42:03,069 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:42:03,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:42:03,069 INFO L85 PathProgramCache]: Analyzing trace with hash -967663183, now seen corresponding path program 10 times [2021-11-07 07:42:03,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:42:03,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095069206] [2021-11-07 07:42:03,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:42:03,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:42:03,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:42:03,260 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-07 07:42:03,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:42:03,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095069206] [2021-11-07 07:42:03,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095069206] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:42:03,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156711705] [2021-11-07 07:42:03,262 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:42:03,262 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:42:03,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:42:03,263 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:42:03,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-07 07:42:03,494 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:42:03,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:42:03,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 07:42:03,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:42:03,644 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-07 07:42:03,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156711705] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:42:03,645 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:42:03,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-11-07 07:42:03,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999035320] [2021-11-07 07:42:03,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 07:42:03,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:42:03,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 07:42:03,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-11-07 07:42:03,647 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 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 07:42:03,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:42:03,754 INFO L93 Difference]: Finished difference Result 111 states and 140 transitions. [2021-11-07 07:42:03,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 07:42:03,754 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 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 60 [2021-11-07 07:42:03,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:42:03,755 INFO L225 Difference]: With dead ends: 111 [2021-11-07 07:42:03,756 INFO L226 Difference]: Without dead ends: 71 [2021-11-07 07:42:03,756 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 60 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 07:42:03,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-07 07:42:03,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2021-11-07 07:42:03,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.2238805970149254) internal successors, (82), 67 states have internal predecessors, (82), 0 states have call successors, (0), 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 07:42:03,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 82 transitions. [2021-11-07 07:42:03,762 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 82 transitions. Word has length 60 [2021-11-07 07:42:03,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:42:03,763 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 82 transitions. [2021-11-07 07:42:03,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 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 07:42:03,763 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 82 transitions. [2021-11-07 07:42:03,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 07:42:03,764 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:42:03,764 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:42:03,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-07 07:42:03,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-07 07:42:03,973 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:42:03,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:42:03,973 INFO L85 PathProgramCache]: Analyzing trace with hash -2055049395, now seen corresponding path program 11 times [2021-11-07 07:42:03,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:42:03,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223703063] [2021-11-07 07:42:03,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:42:03,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:42:04,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:42:04,112 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-11-07 07:42:04,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:42:04,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223703063] [2021-11-07 07:42:04,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223703063] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:42:04,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652407578] [2021-11-07 07:42:04,113 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:42:04,113 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:42:04,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:42:04,116 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:42:04,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-07 07:42:29,519 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-11-07 07:42:29,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:42:29,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 07:42:29,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:42:29,743 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-11-07 07:42:29,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652407578] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:42:29,743 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:42:29,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-11-07 07:42:29,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565978275] [2021-11-07 07:42:29,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-07 07:42:29,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:42:29,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-07 07:42:29,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-11-07 07:42:29,745 INFO L87 Difference]: Start difference. First operand 68 states and 82 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 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 07:42:29,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:42:29,849 INFO L93 Difference]: Finished difference Result 119 states and 150 transitions. [2021-11-07 07:42:29,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 07:42:29,849 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 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) Word has length 65 [2021-11-07 07:42:29,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:42:29,850 INFO L225 Difference]: With dead ends: 119 [2021-11-07 07:42:29,850 INFO L226 Difference]: Without dead ends: 76 [2021-11-07 07:42:29,851 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-11-07 07:42:29,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-07 07:42:29,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2021-11-07 07:42:29,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.2222222222222223) internal successors, (88), 72 states have internal predecessors, (88), 0 states have call successors, (0), 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 07:42:29,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 88 transitions. [2021-11-07 07:42:29,859 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 88 transitions. Word has length 65 [2021-11-07 07:42:29,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:42:29,859 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 88 transitions. [2021-11-07 07:42:29,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 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 07:42:29,860 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 88 transitions. [2021-11-07 07:42:29,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 07:42:29,861 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:42:29,861 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:42:29,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-07 07:42:30,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-07 07:42:30,073 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:42:30,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:42:30,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1898335605, now seen corresponding path program 12 times [2021-11-07 07:42:30,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:42:30,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123468204] [2021-11-07 07:42:30,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:42:30,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:42:30,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:42:30,239 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-11-07 07:42:30,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:42:30,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123468204] [2021-11-07 07:42:30,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123468204] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:42:30,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744555689] [2021-11-07 07:42:30,240 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:42:30,240 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:42:30,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:42:30,252 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:42:30,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-07 07:42:39,831 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-11-07 07:42:39,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:42:39,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 07:42:39,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:42:40,074 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-07 07:42:40,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744555689] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:42:40,075 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:42:40,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-11-07 07:42:40,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708013423] [2021-11-07 07:42:40,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 07:42:40,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:42:40,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 07:42:40,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-11-07 07:42:40,077 INFO L87 Difference]: Start difference. First operand 73 states and 88 transitions. Second operand has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:40,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:42:40,205 INFO L93 Difference]: Finished difference Result 127 states and 160 transitions. [2021-11-07 07:42:40,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 07:42:40,206 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-07 07:42:40,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:42:40,207 INFO L225 Difference]: With dead ends: 127 [2021-11-07 07:42:40,207 INFO L226 Difference]: Without dead ends: 81 [2021-11-07 07:42:40,207 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-11-07 07:42:40,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-07 07:42:40,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2021-11-07 07:42:40,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.2207792207792207) internal successors, (94), 77 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:40,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 94 transitions. [2021-11-07 07:42:40,212 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 94 transitions. Word has length 70 [2021-11-07 07:42:40,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:42:40,212 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 94 transitions. [2021-11-07 07:42:40,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:40,213 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 94 transitions. [2021-11-07 07:42:40,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 07:42:40,214 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:42:40,214 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:42:40,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-07 07:42:40,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-07 07:42:40,421 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:42:40,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:42:40,422 INFO L85 PathProgramCache]: Analyzing trace with hash -684578935, now seen corresponding path program 13 times [2021-11-07 07:42:40,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:42:40,422 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794141620] [2021-11-07 07:42:40,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:42:40,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:42:40,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:42:40,599 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-11-07 07:42:40,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:42:40,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794141620] [2021-11-07 07:42:40,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794141620] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:42:40,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143835940] [2021-11-07 07:42:40,600 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:42:40,600 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:42:40,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:42:40,605 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:42:40,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-07 07:42:40,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:42:40,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 07:42:40,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:42:41,025 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-11-07 07:42:41,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143835940] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:42:41,025 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:42:41,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-11-07 07:42:41,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481867398] [2021-11-07 07:42:41,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-07 07:42:41,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:42:41,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-07 07:42:41,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-11-07 07:42:41,027 INFO L87 Difference]: Start difference. First operand 78 states and 94 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 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 07:42:41,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:42:41,170 INFO L93 Difference]: Finished difference Result 135 states and 170 transitions. [2021-11-07 07:42:41,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 07:42:41,171 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 07:42:41,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:42:41,172 INFO L225 Difference]: With dead ends: 135 [2021-11-07 07:42:41,172 INFO L226 Difference]: Without dead ends: 86 [2021-11-07 07:42:41,175 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-11-07 07:42:41,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-07 07:42:41,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2021-11-07 07:42:41,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.2195121951219512) internal successors, (100), 82 states have internal predecessors, (100), 0 states have call successors, (0), 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 07:42:41,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 100 transitions. [2021-11-07 07:42:41,195 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 100 transitions. Word has length 75 [2021-11-07 07:42:41,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:42:41,195 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 100 transitions. [2021-11-07 07:42:41,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 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 07:42:41,195 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 100 transitions. [2021-11-07 07:42:41,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-07 07:42:41,196 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:42:41,197 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:42:41,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-07 07:42:41,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-07 07:42:41,416 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:42:41,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:42:41,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1002487495, now seen corresponding path program 14 times [2021-11-07 07:42:41,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:42:41,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392957506] [2021-11-07 07:42:41,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:42:41,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:42:41,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:42:41,585 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2021-11-07 07:42:41,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:42:41,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392957506] [2021-11-07 07:42:41,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392957506] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:42:41,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653965024] [2021-11-07 07:42:41,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:42:41,586 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:42:41,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:42:41,587 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:42:41,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-07 07:42:41,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:42:41,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:42:41,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 07:42:41,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:42:42,021 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2021-11-07 07:42:42,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653965024] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:42:42,022 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:42:42,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-11-07 07:42:42,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840432781] [2021-11-07 07:42:42,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 07:42:42,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:42:42,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 07:42:42,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-11-07 07:42:42,024 INFO L87 Difference]: Start difference. First operand 83 states and 100 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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 07:42:42,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:42:42,156 INFO L93 Difference]: Finished difference Result 143 states and 180 transitions. [2021-11-07 07:42:42,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-07 07:42:42,157 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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) Word has length 80 [2021-11-07 07:42:42,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:42:42,158 INFO L225 Difference]: With dead ends: 143 [2021-11-07 07:42:42,158 INFO L226 Difference]: Without dead ends: 91 [2021-11-07 07:42:42,158 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-11-07 07:42:42,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-07 07:42:42,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 88. [2021-11-07 07:42:42,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.2183908045977012) internal successors, (106), 87 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:42,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 106 transitions. [2021-11-07 07:42:42,163 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 106 transitions. Word has length 80 [2021-11-07 07:42:42,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:42:42,163 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 106 transitions. [2021-11-07 07:42:42,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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 07:42:42,164 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 106 transitions. [2021-11-07 07:42:42,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-07 07:42:42,164 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:42:42,164 INFO L513 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:42:42,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-07 07:42:42,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:42:42,384 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:42:42,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:42:42,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1385924667, now seen corresponding path program 15 times [2021-11-07 07:42:42,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:42:42,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527976665] [2021-11-07 07:42:42,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:42:42,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:42:42,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:42:42,601 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2021-11-07 07:42:42,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:42:42,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527976665] [2021-11-07 07:42:42,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527976665] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:42:42,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561612635] [2021-11-07 07:42:42,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:42:42,603 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:42:42,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:42:42,604 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:42:42,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-07 07:43:03,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-11-07 07:43:03,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:43:03,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 07:43:03,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:43:04,109 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-11-07 07:43:04,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561612635] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:43:04,109 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:43:04,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-11-07 07:43:04,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497955666] [2021-11-07 07:43:04,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-07 07:43:04,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:43:04,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-07 07:43:04,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-11-07 07:43:04,115 INFO L87 Difference]: Start difference. First operand 88 states and 106 transitions. Second operand has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:43:04,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:43:04,251 INFO L93 Difference]: Finished difference Result 151 states and 190 transitions. [2021-11-07 07:43:04,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 07:43:04,252 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-07 07:43:04,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:43:04,253 INFO L225 Difference]: With dead ends: 151 [2021-11-07 07:43:04,253 INFO L226 Difference]: Without dead ends: 96 [2021-11-07 07:43:04,255 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-11-07 07:43:04,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-07 07:43:04,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 93. [2021-11-07 07:43:04,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.2173913043478262) internal successors, (112), 92 states have internal predecessors, (112), 0 states have call successors, (0), 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 07:43:04,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 112 transitions. [2021-11-07 07:43:04,261 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 112 transitions. Word has length 85 [2021-11-07 07:43:04,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:43:04,262 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 112 transitions. [2021-11-07 07:43:04,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:43:04,263 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 112 transitions. [2021-11-07 07:43:04,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-07 07:43:04,263 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:43:04,264 INFO L513 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:43:04,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-07 07:43:04,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:43:04,465 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:43:04,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:43:04,465 INFO L85 PathProgramCache]: Analyzing trace with hash -74597123, now seen corresponding path program 16 times [2021-11-07 07:43:04,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:43:04,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530242786] [2021-11-07 07:43:04,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:43:04,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:43:04,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:43:04,664 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-11-07 07:43:04,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:43:04,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530242786] [2021-11-07 07:43:04,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530242786] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:43:04,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253748539] [2021-11-07 07:43:04,665 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:43:04,665 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:43:04,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:43:04,666 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:43:04,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-07 07:43:05,076 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:43:05,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:43:05,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-07 07:43:05,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:43:05,270 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-11-07 07:43:05,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253748539] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:43:05,270 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:43:05,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-11-07 07:43:05,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25563316] [2021-11-07 07:43:05,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-07 07:43:05,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:43:05,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-07 07:43:05,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-11-07 07:43:05,273 INFO L87 Difference]: Start difference. First operand 93 states and 112 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 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 07:43:05,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:43:05,421 INFO L93 Difference]: Finished difference Result 159 states and 200 transitions. [2021-11-07 07:43:05,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-07 07:43:05,421 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 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 90 [2021-11-07 07:43:05,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:43:05,422 INFO L225 Difference]: With dead ends: 159 [2021-11-07 07:43:05,422 INFO L226 Difference]: Without dead ends: 101 [2021-11-07 07:43:05,422 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-11-07 07:43:05,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-11-07 07:43:05,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 98. [2021-11-07 07:43:05,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.2164948453608246) internal successors, (118), 97 states have internal predecessors, (118), 0 states have call successors, (0), 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 07:43:05,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 118 transitions. [2021-11-07 07:43:05,427 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 118 transitions. Word has length 90 [2021-11-07 07:43:05,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:43:05,427 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 118 transitions. [2021-11-07 07:43:05,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 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 07:43:05,427 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 118 transitions. [2021-11-07 07:43:05,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-07 07:43:05,428 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:43:05,428 INFO L513 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:43:05,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-07 07:43:05,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-07 07:43:05,648 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:43:05,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:43:05,649 INFO L85 PathProgramCache]: Analyzing trace with hash 2024349697, now seen corresponding path program 17 times [2021-11-07 07:43:05,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:43:05,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7216622] [2021-11-07 07:43:05,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:43:05,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:43:05,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:43:05,867 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2021-11-07 07:43:05,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:43:05,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7216622] [2021-11-07 07:43:05,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7216622] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:43:05,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158076940] [2021-11-07 07:43:05,868 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:43:05,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:43:05,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:43:05,869 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:43:05,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0eb05431-a25b-454a-8e98-7d65162859b3/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process