./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench/divbin2.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_c167f6c7-cdcc-4419-834a-c3eeb114b8ed/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c167f6c7-cdcc-4419-834a-c3eeb114b8ed/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_c167f6c7-cdcc-4419-834a-c3eeb114b8ed/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c167f6c7-cdcc-4419-834a-c3eeb114b8ed/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench/divbin2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c167f6c7-cdcc-4419-834a-c3eeb114b8ed/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_c167f6c7-cdcc-4419-834a-c3eeb114b8ed/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 c7e3f11d23b462949b18ec2057853f57240b0651aa6fb66cf591585739df9d3e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 08:32:57,639 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 08:32:57,642 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 08:32:57,679 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 08:32:57,679 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 08:32:57,681 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 08:32:57,684 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 08:32:57,687 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 08:32:57,689 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 08:32:57,691 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 08:32:57,693 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 08:32:57,695 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 08:32:57,695 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 08:32:57,697 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 08:32:57,699 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 08:32:57,701 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 08:32:57,703 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 08:32:57,705 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 08:32:57,708 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 08:32:57,711 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 08:32:57,714 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 08:32:57,716 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 08:32:57,718 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 08:32:57,719 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 08:32:57,724 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 08:32:57,725 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 08:32:57,725 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 08:32:57,727 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 08:32:57,727 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 08:32:57,729 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 08:32:57,730 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 08:32:57,731 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 08:32:57,732 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 08:32:57,734 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 08:32:57,736 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 08:32:57,736 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 08:32:57,737 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 08:32:57,738 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 08:32:57,738 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 08:32:57,740 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 08:32:57,741 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 08:32:57,742 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c167f6c7-cdcc-4419-834a-c3eeb114b8ed/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-07 08:32:57,770 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 08:32:57,770 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 08:32:57,771 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 08:32:57,771 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 08:32:57,772 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 08:32:57,773 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 08:32:57,773 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 08:32:57,774 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 08:32:57,774 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 08:32:57,774 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 08:32:57,775 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 08:32:57,775 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 08:32:57,775 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 08:32:57,776 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 08:32:57,776 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 08:32:57,776 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 08:32:57,776 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 08:32:57,777 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 08:32:57,777 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 08:32:57,777 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 08:32:57,778 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 08:32:57,778 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 08:32:57,778 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:32:57,779 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 08:32:57,779 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 08:32:57,779 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 08:32:57,780 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 08:32:57,780 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 08:32:57,780 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 08:32:57,781 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 08:32:57,781 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 08:32:57,781 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 08:32:57,782 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_c167f6c7-cdcc-4419-834a-c3eeb114b8ed/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c167f6c7-cdcc-4419-834a-c3eeb114b8ed/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c7e3f11d23b462949b18ec2057853f57240b0651aa6fb66cf591585739df9d3e [2021-11-07 08:32:58,090 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 08:32:58,113 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 08:32:58,116 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 08:32:58,117 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 08:32:58,118 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 08:32:58,119 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c167f6c7-cdcc-4419-834a-c3eeb114b8ed/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/nla-digbench/divbin2.i [2021-11-07 08:32:58,195 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c167f6c7-cdcc-4419-834a-c3eeb114b8ed/bin/uautomizer-AkOaLMaTGY/data/b7393dc52/bb7b32e9af3648c0be8754dc39ae6bc0/FLAGf1f857864 [2021-11-07 08:32:58,781 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 08:32:58,782 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c167f6c7-cdcc-4419-834a-c3eeb114b8ed/sv-benchmarks/c/nla-digbench/divbin2.i [2021-11-07 08:32:58,789 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c167f6c7-cdcc-4419-834a-c3eeb114b8ed/bin/uautomizer-AkOaLMaTGY/data/b7393dc52/bb7b32e9af3648c0be8754dc39ae6bc0/FLAGf1f857864 [2021-11-07 08:32:59,142 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c167f6c7-cdcc-4419-834a-c3eeb114b8ed/bin/uautomizer-AkOaLMaTGY/data/b7393dc52/bb7b32e9af3648c0be8754dc39ae6bc0 [2021-11-07 08:32:59,145 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 08:32:59,148 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 08:32:59,151 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 08:32:59,151 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 08:32:59,156 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 08:32:59,158 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:32:59" (1/1) ... [2021-11-07 08:32:59,161 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7461e28a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:32:59, skipping insertion in model container [2021-11-07 08:32:59,161 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:32:59" (1/1) ... [2021-11-07 08:32:59,170 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 08:32:59,188 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 08:32:59,371 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_c167f6c7-cdcc-4419-834a-c3eeb114b8ed/sv-benchmarks/c/nla-digbench/divbin2.i[951,964] [2021-11-07 08:32:59,385 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:32:59,393 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 08:32:59,409 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_c167f6c7-cdcc-4419-834a-c3eeb114b8ed/sv-benchmarks/c/nla-digbench/divbin2.i[951,964] [2021-11-07 08:32:59,414 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:32:59,430 INFO L208 MainTranslator]: Completed translation [2021-11-07 08:32:59,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:32:59 WrapperNode [2021-11-07 08:32:59,430 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 08:32:59,432 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 08:32:59,432 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 08:32:59,432 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 08:32:59,440 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:32:59" (1/1) ... [2021-11-07 08:32:59,448 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:32:59" (1/1) ... [2021-11-07 08:32:59,469 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 08:32:59,470 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 08:32:59,470 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 08:32:59,470 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 08:32:59,479 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:32:59" (1/1) ... [2021-11-07 08:32:59,479 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:32:59" (1/1) ... [2021-11-07 08:32:59,481 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:32:59" (1/1) ... [2021-11-07 08:32:59,481 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:32:59" (1/1) ... [2021-11-07 08:32:59,485 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:32:59" (1/1) ... [2021-11-07 08:32:59,489 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:32:59" (1/1) ... [2021-11-07 08:32:59,491 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:32:59" (1/1) ... [2021-11-07 08:32:59,493 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 08:32:59,494 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 08:32:59,494 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 08:32:59,494 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 08:32:59,495 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:32:59" (1/1) ... [2021-11-07 08:32:59,504 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:32:59,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c167f6c7-cdcc-4419-834a-c3eeb114b8ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:32:59,545 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c167f6c7-cdcc-4419-834a-c3eeb114b8ed/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 08:32:59,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c167f6c7-cdcc-4419-834a-c3eeb114b8ed/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 08:32:59,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 08:32:59,588 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 08:32:59,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 08:32:59,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 08:32:59,784 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 08:32:59,784 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-11-07 08:32:59,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:32:59 BoogieIcfgContainer [2021-11-07 08:32:59,786 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 08:32:59,788 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 08:32:59,789 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 08:32:59,792 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 08:32:59,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:32:59" (1/3) ... [2021-11-07 08:32:59,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a683bec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:32:59, skipping insertion in model container [2021-11-07 08:32:59,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:32:59" (2/3) ... [2021-11-07 08:32:59,794 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a683bec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:32:59, skipping insertion in model container [2021-11-07 08:32:59,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:32:59" (3/3) ... [2021-11-07 08:32:59,795 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2.i [2021-11-07 08:32:59,801 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 08:32:59,801 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-07 08:32:59,853 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 08:32:59,860 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 08:32:59,861 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-07 08:32:59,878 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:32:59,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-07 08:32:59,885 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:32:59,886 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-07 08:32:59,887 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:32:59,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:32:59,894 INFO L85 PathProgramCache]: Analyzing trace with hash 889913870, now seen corresponding path program 1 times [2021-11-07 08:32:59,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:32:59,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614269807] [2021-11-07 08:32:59,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:32:59,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:33:00,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:33:00,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:33:00,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:33:00,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614269807] [2021-11-07 08:33:00,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614269807] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:33:00,092 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:33:00,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 08:33:00,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662258696] [2021-11-07 08:33:00,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 08:33:00,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:33:00,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 08:33:00,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 08:33:00,118 INFO L87 Difference]: Start difference. First operand has 18 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 17 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) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:00,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:33:00,144 INFO L93 Difference]: Finished difference Result 32 states and 45 transitions. [2021-11-07 08:33:00,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 08:33:00,146 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 6 [2021-11-07 08:33:00,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:33:00,160 INFO L225 Difference]: With dead ends: 32 [2021-11-07 08:33:00,160 INFO L226 Difference]: Without dead ends: 14 [2021-11-07 08:33:00,165 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 08:33:00,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-07 08:33:00,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-11-07 08:33:00,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:00,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-11-07 08:33:00,204 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 6 [2021-11-07 08:33:00,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:33:00,206 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-11-07 08:33:00,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:00,207 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-11-07 08:33:00,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-07 08:33:00,208 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:33:00,208 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:33:00,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 08:33:00,209 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:33:00,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:33:00,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1810671351, now seen corresponding path program 1 times [2021-11-07 08:33:00,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:33:00,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886391943] [2021-11-07 08:33:00,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:33:00,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:33:00,258 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:33:00,262 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1419316884] [2021-11-07 08:33:00,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:33:00,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:33:00,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c167f6c7-cdcc-4419-834a-c3eeb114b8ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:33:00,265 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c167f6c7-cdcc-4419-834a-c3eeb114b8ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:33:00,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c167f6c7-cdcc-4419-834a-c3eeb114b8ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 08:33:00,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:33:00,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 08:33:00,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:33:00,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:33:00,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:33:00,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886391943] [2021-11-07 08:33:00,658 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:33:00,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419316884] [2021-11-07 08:33:00,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419316884] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:33:00,659 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:33:00,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:33:00,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987597340] [2021-11-07 08:33:00,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:33:00,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:33:00,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:33:00,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:33:00,663 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:00,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:33:00,758 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2021-11-07 08:33:00,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:33:00,759 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-07 08:33:00,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:33:00,760 INFO L225 Difference]: With dead ends: 27 [2021-11-07 08:33:00,760 INFO L226 Difference]: Without dead ends: 21 [2021-11-07 08:33:00,761 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:33:00,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-07 08:33:00,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2021-11-07 08:33:00,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 18 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 08:33:00,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2021-11-07 08:33:00,766 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 7 [2021-11-07 08:33:00,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:33:00,767 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2021-11-07 08:33:00,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:00,767 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2021-11-07 08:33:00,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-07 08:33:00,768 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:33:00,768 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:33:00,809 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c167f6c7-cdcc-4419-834a-c3eeb114b8ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-07 08:33:00,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c167f6c7-cdcc-4419-834a-c3eeb114b8ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:33:00,991 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:33:00,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:33:00,992 INFO L85 PathProgramCache]: Analyzing trace with hash 635414898, now seen corresponding path program 1 times [2021-11-07 08:33:00,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:33:00,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524831606] [2021-11-07 08:33:00,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:33:00,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:33:01,014 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:33:01,014 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1767432278] [2021-11-07 08:33:01,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:33:01,019 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:33:01,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c167f6c7-cdcc-4419-834a-c3eeb114b8ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:33:01,020 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c167f6c7-cdcc-4419-834a-c3eeb114b8ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:33:01,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c167f6c7-cdcc-4419-834a-c3eeb114b8ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 08:33:01,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:33:01,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 08:33:01,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:33:01,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:33:01,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:33:01,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524831606] [2021-11-07 08:33:01,300 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:33:01,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767432278] [2021-11-07 08:33:01,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767432278] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:33:01,300 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:33:01,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-11-07 08:33:01,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995944320] [2021-11-07 08:33:01,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:33:01,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:33:01,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:33:01,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:33:01,303 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:01,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:33:01,430 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2021-11-07 08:33:01,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 08:33:01,431 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 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 9 [2021-11-07 08:33:01,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:33:01,435 INFO L225 Difference]: With dead ends: 32 [2021-11-07 08:33:01,435 INFO L226 Difference]: Without dead ends: 26 [2021-11-07 08:33:01,436 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:33:01,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-07 08:33:01,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2021-11-07 08:33:01,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:01,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-11-07 08:33:01,450 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 9 [2021-11-07 08:33:01,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:33:01,451 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-11-07 08:33:01,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:01,451 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-11-07 08:33:01,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-07 08:33:01,452 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:33:01,452 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:33:01,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c167f6c7-cdcc-4419-834a-c3eeb114b8ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 08:33:01,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c167f6c7-cdcc-4419-834a-c3eeb114b8ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:33:01,668 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:33:01,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:33:01,669 INFO L85 PathProgramCache]: Analyzing trace with hash -806594708, now seen corresponding path program 1 times [2021-11-07 08:33:01,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:33:01,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097753809] [2021-11-07 08:33:01,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:33:01,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:33:01,692 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:33:01,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1895408929] [2021-11-07 08:33:01,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:33:01,694 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:33:01,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c167f6c7-cdcc-4419-834a-c3eeb114b8ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:33:01,698 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c167f6c7-cdcc-4419-834a-c3eeb114b8ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:33:01,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c167f6c7-cdcc-4419-834a-c3eeb114b8ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 08:33:01,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:33:01,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 08:33:01,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:33:01,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:33:01,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:33:01,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097753809] [2021-11-07 08:33:01,826 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:33:01,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895408929] [2021-11-07 08:33:01,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895408929] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:33:01,827 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:33:01,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:33:01,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881690887] [2021-11-07 08:33:01,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:33:01,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:33:01,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:33:01,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:33:01,829 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:01,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:33:01,851 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2021-11-07 08:33:01,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:33:01,852 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-07 08:33:01,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:33:01,852 INFO L225 Difference]: With dead ends: 33 [2021-11-07 08:33:01,853 INFO L226 Difference]: Without dead ends: 20 [2021-11-07 08:33:01,853 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:33:01,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-07 08:33:01,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-11-07 08:33:01,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:01,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-11-07 08:33:01,857 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 11 [2021-11-07 08:33:01,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:33:01,860 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-11-07 08:33:01,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:01,860 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-11-07 08:33:01,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-07 08:33:01,861 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:33:01,862 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:33:01,895 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c167f6c7-cdcc-4419-834a-c3eeb114b8ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-07 08:33:02,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c167f6c7-cdcc-4419-834a-c3eeb114b8ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:33:02,082 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:33:02,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:33:02,083 INFO L85 PathProgramCache]: Analyzing trace with hash 2069079143, now seen corresponding path program 1 times [2021-11-07 08:33:02,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:33:02,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118989879] [2021-11-07 08:33:02,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:33:02,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:33:02,096 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:33:02,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1835836265] [2021-11-07 08:33:02,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:33:02,097 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:33:02,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c167f6c7-cdcc-4419-834a-c3eeb114b8ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:33:02,098 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c167f6c7-cdcc-4419-834a-c3eeb114b8ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:33:02,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c167f6c7-cdcc-4419-834a-c3eeb114b8ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 08:33:02,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:33:02,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-07 08:33:02,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:33:02,704 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:33:02,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:33:02,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118989879] [2021-11-07 08:33:02,714 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:33:02,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835836265] [2021-11-07 08:33:02,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835836265] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:33:02,718 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:33:02,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-11-07 08:33:02,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256120234] [2021-11-07 08:33:02,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 08:33:02,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:33:02,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 08:33:02,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:33:02,721 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:05,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:33:05,106 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2021-11-07 08:33:05,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 08:33:05,107 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 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 13 [2021-11-07 08:33:05,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:33:05,108 INFO L225 Difference]: With dead ends: 45 [2021-11-07 08:33:05,108 INFO L226 Difference]: Without dead ends: 29 [2021-11-07 08:33:05,108 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-07 08:33:05,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-07 08:33:05,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-11-07 08:33:05,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 28 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:05,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2021-11-07 08:33:05,113 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 13 [2021-11-07 08:33:05,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:33:05,114 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2021-11-07 08:33:05,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:05,114 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2021-11-07 08:33:05,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-07 08:33:05,115 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:33:05,115 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:33:05,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c167f6c7-cdcc-4419-834a-c3eeb114b8ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-07 08:33:05,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c167f6c7-cdcc-4419-834a-c3eeb114b8ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:33:05,316 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:33:05,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:33:05,317 INFO L85 PathProgramCache]: Analyzing trace with hash -367288670, now seen corresponding path program 2 times [2021-11-07 08:33:05,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:33:05,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150393962] [2021-11-07 08:33:05,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:33:05,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:33:05,330 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:33:05,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [624299029] [2021-11-07 08:33:05,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:33:05,331 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:33:05,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c167f6c7-cdcc-4419-834a-c3eeb114b8ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:33:05,332 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c167f6c7-cdcc-4419-834a-c3eeb114b8ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:33:05,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c167f6c7-cdcc-4419-834a-c3eeb114b8ed/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process