./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench/dijkstra-u.c --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_12dd33ad-d7f3-4a75-b648-1d5ffa7676ca/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12dd33ad-d7f3-4a75-b648-1d5ffa7676ca/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_12dd33ad-d7f3-4a75-b648-1d5ffa7676ca/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12dd33ad-d7f3-4a75-b648-1d5ffa7676ca/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench/dijkstra-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12dd33ad-d7f3-4a75-b648-1d5ffa7676ca/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_12dd33ad-d7f3-4a75-b648-1d5ffa7676ca/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 b586a178399b4c0df2fdcb66faa06566663e0a18b90a5f0ce0551810014ff769 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 08:36:38,370 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 08:36:38,373 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 08:36:38,433 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 08:36:38,434 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 08:36:38,440 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 08:36:38,442 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 08:36:38,445 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 08:36:38,450 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 08:36:38,457 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 08:36:38,458 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 08:36:38,460 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 08:36:38,460 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 08:36:38,461 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 08:36:38,463 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 08:36:38,465 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 08:36:38,466 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 08:36:38,467 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 08:36:38,469 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 08:36:38,472 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 08:36:38,474 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 08:36:38,479 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 08:36:38,481 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 08:36:38,483 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 08:36:38,487 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 08:36:38,491 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 08:36:38,492 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 08:36:38,493 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 08:36:38,495 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 08:36:38,496 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 08:36:38,497 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 08:36:38,498 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 08:36:38,500 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 08:36:38,502 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 08:36:38,504 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 08:36:38,504 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 08:36:38,505 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 08:36:38,505 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 08:36:38,505 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 08:36:38,507 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 08:36:38,508 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 08:36:38,509 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12dd33ad-d7f3-4a75-b648-1d5ffa7676ca/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-07 08:36:38,556 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 08:36:38,556 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 08:36:38,557 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 08:36:38,558 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 08:36:38,559 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 08:36:38,559 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 08:36:38,560 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 08:36:38,560 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 08:36:38,560 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 08:36:38,560 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 08:36:38,562 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 08:36:38,562 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 08:36:38,562 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 08:36:38,562 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 08:36:38,563 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 08:36:38,563 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 08:36:38,563 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 08:36:38,563 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 08:36:38,564 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 08:36:38,564 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 08:36:38,564 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 08:36:38,564 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 08:36:38,565 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:36:38,565 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 08:36:38,565 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 08:36:38,565 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 08:36:38,566 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 08:36:38,566 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 08:36:38,566 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 08:36:38,568 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 08:36:38,568 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 08:36:38,568 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 08:36:38,569 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_12dd33ad-d7f3-4a75-b648-1d5ffa7676ca/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12dd33ad-d7f3-4a75-b648-1d5ffa7676ca/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b586a178399b4c0df2fdcb66faa06566663e0a18b90a5f0ce0551810014ff769 [2021-11-07 08:36:38,867 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 08:36:38,899 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 08:36:38,902 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 08:36:38,904 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 08:36:38,904 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 08:36:38,905 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12dd33ad-d7f3-4a75-b648-1d5ffa7676ca/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/nla-digbench/dijkstra-u.c [2021-11-07 08:36:38,996 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12dd33ad-d7f3-4a75-b648-1d5ffa7676ca/bin/uautomizer-AkOaLMaTGY/data/c95eb92ad/b8d904bce9154193bce32a0bb876dcfd/FLAGedbe4b86a [2021-11-07 08:36:39,432 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 08:36:39,433 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12dd33ad-d7f3-4a75-b648-1d5ffa7676ca/sv-benchmarks/c/nla-digbench/dijkstra-u.c [2021-11-07 08:36:39,441 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12dd33ad-d7f3-4a75-b648-1d5ffa7676ca/bin/uautomizer-AkOaLMaTGY/data/c95eb92ad/b8d904bce9154193bce32a0bb876dcfd/FLAGedbe4b86a [2021-11-07 08:36:39,814 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12dd33ad-d7f3-4a75-b648-1d5ffa7676ca/bin/uautomizer-AkOaLMaTGY/data/c95eb92ad/b8d904bce9154193bce32a0bb876dcfd [2021-11-07 08:36:39,817 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 08:36:39,818 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 08:36:39,820 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 08:36:39,820 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 08:36:39,824 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 08:36:39,825 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:36:39" (1/1) ... [2021-11-07 08:36:39,826 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4432659b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:36:39, skipping insertion in model container [2021-11-07 08:36:39,827 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:36:39" (1/1) ... [2021-11-07 08:36:39,834 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 08:36:39,853 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 08:36:40,018 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_12dd33ad-d7f3-4a75-b648-1d5ffa7676ca/sv-benchmarks/c/nla-digbench/dijkstra-u.c[525,538] [2021-11-07 08:36:40,047 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:36:40,055 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 08:36:40,066 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_12dd33ad-d7f3-4a75-b648-1d5ffa7676ca/sv-benchmarks/c/nla-digbench/dijkstra-u.c[525,538] [2021-11-07 08:36:40,083 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:36:40,097 INFO L208 MainTranslator]: Completed translation [2021-11-07 08:36:40,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:36:40 WrapperNode [2021-11-07 08:36:40,098 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 08:36:40,099 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 08:36:40,099 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 08:36:40,099 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 08:36:40,124 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:36:40" (1/1) ... [2021-11-07 08:36:40,132 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:36:40" (1/1) ... [2021-11-07 08:36:40,178 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 08:36:40,182 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 08:36:40,182 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 08:36:40,183 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 08:36:40,191 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:36:40" (1/1) ... [2021-11-07 08:36:40,193 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:36:40" (1/1) ... [2021-11-07 08:36:40,207 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:36:40" (1/1) ... [2021-11-07 08:36:40,215 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:36:40" (1/1) ... [2021-11-07 08:36:40,220 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:36:40" (1/1) ... [2021-11-07 08:36:40,230 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:36:40" (1/1) ... [2021-11-07 08:36:40,239 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:36:40" (1/1) ... [2021-11-07 08:36:40,241 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 08:36:40,243 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 08:36:40,243 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 08:36:40,243 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 08:36:40,244 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:36:40" (1/1) ... [2021-11-07 08:36:40,255 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:36:40,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12dd33ad-d7f3-4a75-b648-1d5ffa7676ca/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:36:40,278 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12dd33ad-d7f3-4a75-b648-1d5ffa7676ca/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 08:36:40,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12dd33ad-d7f3-4a75-b648-1d5ffa7676ca/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 08:36:40,333 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 08:36:40,333 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 08:36:40,334 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 08:36:40,334 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 08:36:40,631 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 08:36:40,631 INFO L299 CfgBuilder]: Removed 26 assume(true) statements. [2021-11-07 08:36:40,633 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:36:40 BoogieIcfgContainer [2021-11-07 08:36:40,633 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 08:36:40,635 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 08:36:40,635 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 08:36:40,639 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 08:36:40,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:36:39" (1/3) ... [2021-11-07 08:36:40,640 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73be238d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:36:40, skipping insertion in model container [2021-11-07 08:36:40,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:36:40" (2/3) ... [2021-11-07 08:36:40,641 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73be238d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:36:40, skipping insertion in model container [2021-11-07 08:36:40,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:36:40" (3/3) ... [2021-11-07 08:36:40,643 INFO L111 eAbstractionObserver]: Analyzing ICFG dijkstra-u.c [2021-11-07 08:36:40,648 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 08:36:40,649 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2021-11-07 08:36:40,697 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 08:36:40,704 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 08:36:40,705 INFO L340 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2021-11-07 08:36:40,721 INFO L276 IsEmpty]: Start isEmpty. Operand has 48 states, 38 states have (on average 1.6842105263157894) internal successors, (64), 47 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 08:36:40,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 08:36:40,727 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:36:40,727 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:36:40,728 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2021-11-07 08:36:40,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:36:40,734 INFO L85 PathProgramCache]: Analyzing trace with hash 119520859, now seen corresponding path program 1 times [2021-11-07 08:36:40,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:36:40,744 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538049535] [2021-11-07 08:36:40,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:36:40,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:36:40,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:36:40,921 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 08:36:40,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:36:40,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538049535] [2021-11-07 08:36:40,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538049535] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:36:40,925 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:36:40,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 08:36:40,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448479392] [2021-11-07 08:36:40,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 08:36:40,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:36:40,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 08:36:40,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 08:36:40,978 INFO L87 Difference]: Start difference. First operand has 48 states, 38 states have (on average 1.6842105263157894) internal successors, (64), 47 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) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 08:36:41,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:36:41,011 INFO L93 Difference]: Finished difference Result 93 states and 124 transitions. [2021-11-07 08:36:41,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 08:36:41,013 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 8 [2021-11-07 08:36:41,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:36:41,024 INFO L225 Difference]: With dead ends: 93 [2021-11-07 08:36:41,024 INFO L226 Difference]: Without dead ends: 44 [2021-11-07 08:36:41,029 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 08:36:41,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-07 08:36:41,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-11-07 08:36:41,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 43 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 08:36:41,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2021-11-07 08:36:41,066 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 8 [2021-11-07 08:36:41,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:36:41,066 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2021-11-07 08:36:41,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 08:36:41,067 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2021-11-07 08:36:41,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-07 08:36:41,067 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:36:41,067 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:36:41,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 08:36:41,068 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2021-11-07 08:36:41,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:36:41,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1186643548, now seen corresponding path program 1 times [2021-11-07 08:36:41,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:36:41,070 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685786379] [2021-11-07 08:36:41,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:36:41,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:36:41,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:36:41,438 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 08:36:41,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:36:41,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685786379] [2021-11-07 08:36:41,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685786379] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:36:41,439 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:36:41,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:36:41,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260942539] [2021-11-07 08:36:41,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:36:41,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:36:41,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:36:41,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:36:41,443 INFO L87 Difference]: Start difference. First operand 44 states and 46 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 08:36:44,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:36:44,097 INFO L93 Difference]: Finished difference Result 120 states and 125 transitions. [2021-11-07 08:36:44,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:36:44,099 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 08:36:44,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:36:44,100 INFO L225 Difference]: With dead ends: 120 [2021-11-07 08:36:44,101 INFO L226 Difference]: Without dead ends: 82 [2021-11-07 08:36:44,102 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:36:44,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-07 08:36:44,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 59. [2021-11-07 08:36:44,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 50 states have (on average 1.34) internal successors, (67), 58 states have internal predecessors, (67), 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 08:36:44,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2021-11-07 08:36:44,117 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 9 [2021-11-07 08:36:44,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:36:44,118 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2021-11-07 08:36:44,118 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 08:36:44,118 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2021-11-07 08:36:44,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-07 08:36:44,119 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:36:44,119 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:36:44,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 08:36:44,120 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2021-11-07 08:36:44,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:36:44,121 INFO L85 PathProgramCache]: Analyzing trace with hash -2096694849, now seen corresponding path program 1 times [2021-11-07 08:36:44,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:36:44,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042046151] [2021-11-07 08:36:44,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:36:44,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:36:44,141 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:36:44,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2096253598] [2021-11-07 08:36:44,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:36:44,142 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:36:44,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12dd33ad-d7f3-4a75-b648-1d5ffa7676ca/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:36:44,176 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12dd33ad-d7f3-4a75-b648-1d5ffa7676ca/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:36:44,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12dd33ad-d7f3-4a75-b648-1d5ffa7676ca/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 08:36:44,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:36:44,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 08:36:44,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:36:44,385 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 08:36:44,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:36:44,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042046151] [2021-11-07 08:36:44,398 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:36:44,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096253598] [2021-11-07 08:36:44,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096253598] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:36:44,399 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:36:44,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:36:44,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652494739] [2021-11-07 08:36:44,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:36:44,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:36:44,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:36:44,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:36:44,403 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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 08:36:46,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:36:46,241 INFO L93 Difference]: Finished difference Result 99 states and 108 transitions. [2021-11-07 08:36:46,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 08:36:46,242 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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 08:36:46,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:36:46,243 INFO L225 Difference]: With dead ends: 99 [2021-11-07 08:36:46,243 INFO L226 Difference]: Without dead ends: 83 [2021-11-07 08:36:46,243 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:36:46,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-07 08:36:46,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 75. [2021-11-07 08:36:46,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 66 states have (on average 1.2575757575757576) internal successors, (83), 74 states have internal predecessors, (83), 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 08:36:46,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 83 transitions. [2021-11-07 08:36:46,257 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 83 transitions. Word has length 11 [2021-11-07 08:36:46,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:36:46,257 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 83 transitions. [2021-11-07 08:36:46,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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 08:36:46,258 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 83 transitions. [2021-11-07 08:36:46,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-07 08:36:46,259 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:36:46,259 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:36:46,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12dd33ad-d7f3-4a75-b648-1d5ffa7676ca/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 08:36:46,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12dd33ad-d7f3-4a75-b648-1d5ffa7676ca/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:36:46,482 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2021-11-07 08:36:46,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:36:46,483 INFO L85 PathProgramCache]: Analyzing trace with hash -2054849417, now seen corresponding path program 1 times [2021-11-07 08:36:46,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:36:46,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245527234] [2021-11-07 08:36:46,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:36:46,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:36:46,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:36:46,810 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 08:36:46,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:36:46,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245527234] [2021-11-07 08:36:46,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245527234] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:36:46,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714537987] [2021-11-07 08:36:46,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:36:46,814 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:36:46,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12dd33ad-d7f3-4a75-b648-1d5ffa7676ca/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:36:46,815 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12dd33ad-d7f3-4a75-b648-1d5ffa7676ca/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:36:46,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12dd33ad-d7f3-4a75-b648-1d5ffa7676ca/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 08:36:46,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:36:46,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 08:36:46,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:36:47,087 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 08:36:47,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714537987] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:36:47,088 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:36:47,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-07 08:36:47,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709358582] [2021-11-07 08:36:47,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 08:36:47,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:36:47,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 08:36:47,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-07 08:36:47,091 INFO L87 Difference]: Start difference. First operand 75 states and 83 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 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 08:37:02,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:37:02,254 INFO L93 Difference]: Finished difference Result 123 states and 131 transitions. [2021-11-07 08:37:02,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 08:37:02,255 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 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 11 [2021-11-07 08:37:02,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:37:02,256 INFO L225 Difference]: With dead ends: 123 [2021-11-07 08:37:02,256 INFO L226 Difference]: Without dead ends: 117 [2021-11-07 08:37:02,257 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2021-11-07 08:37:02,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-11-07 08:37:02,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 92. [2021-11-07 08:37:02,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 83 states have (on average 1.2289156626506024) internal successors, (102), 91 states have internal predecessors, (102), 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 08:37:02,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 102 transitions. [2021-11-07 08:37:02,272 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 102 transitions. Word has length 11 [2021-11-07 08:37:02,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:37:02,272 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 102 transitions. [2021-11-07 08:37:02,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 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 08:37:02,273 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 102 transitions. [2021-11-07 08:37:02,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-07 08:37:02,273 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:37:02,273 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:37:02,310 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12dd33ad-d7f3-4a75-b648-1d5ffa7676ca/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-07 08:37:02,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12dd33ad-d7f3-4a75-b648-1d5ffa7676ca/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:37:02,474 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2021-11-07 08:37:02,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:37:02,475 INFO L85 PathProgramCache]: Analyzing trace with hash -583931454, now seen corresponding path program 1 times [2021-11-07 08:37:02,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:37:02,475 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136719942] [2021-11-07 08:37:02,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:37:02,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:37:02,499 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:37:02,507 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1745984026] [2021-11-07 08:37:02,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:37:02,507 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:37:02,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12dd33ad-d7f3-4a75-b648-1d5ffa7676ca/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:37:02,510 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12dd33ad-d7f3-4a75-b648-1d5ffa7676ca/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:37:02,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12dd33ad-d7f3-4a75-b648-1d5ffa7676ca/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 08:37:02,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:37:02,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 08:37:02,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:37:02,823 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 08:37:02,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:37:02,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136719942] [2021-11-07 08:37:02,824 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:37:02,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745984026] [2021-11-07 08:37:02,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745984026] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:37:02,825 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:37:02,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:37:02,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113915643] [2021-11-07 08:37:02,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:37:02,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:37:02,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:37:02,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:37:02,833 INFO L87 Difference]: Start difference. First operand 92 states and 102 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 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 08:37:04,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:37:04,218 INFO L93 Difference]: Finished difference Result 98 states and 106 transitions. [2021-11-07 08:37:04,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:37:04,222 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 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 08:37:04,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:37:04,223 INFO L225 Difference]: With dead ends: 98 [2021-11-07 08:37:04,223 INFO L226 Difference]: Without dead ends: 79 [2021-11-07 08:37:04,223 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:37:04,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-07 08:37:04,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-11-07 08:37:04,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 70 states have (on average 1.2428571428571429) internal successors, (87), 78 states have internal predecessors, (87), 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 08:37:04,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 87 transitions. [2021-11-07 08:37:04,232 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 87 transitions. Word has length 13 [2021-11-07 08:37:04,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:37:04,233 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 87 transitions. [2021-11-07 08:37:04,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 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 08:37:04,233 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 87 transitions. [2021-11-07 08:37:04,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-07 08:37:04,234 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:37:04,234 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:37:04,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12dd33ad-d7f3-4a75-b648-1d5ffa7676ca/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-07 08:37:04,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12dd33ad-d7f3-4a75-b648-1d5ffa7676ca/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:37:04,435 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2021-11-07 08:37:04,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:37:04,435 INFO L85 PathProgramCache]: Analyzing trace with hash 501883485, now seen corresponding path program 1 times [2021-11-07 08:37:04,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:37:04,435 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363334134] [2021-11-07 08:37:04,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:37:04,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:37:04,446 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:37:04,446 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2089893697] [2021-11-07 08:37:04,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:37:04,446 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:37:04,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12dd33ad-d7f3-4a75-b648-1d5ffa7676ca/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:37:04,460 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12dd33ad-d7f3-4a75-b648-1d5ffa7676ca/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:37:04,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12dd33ad-d7f3-4a75-b648-1d5ffa7676ca/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 08:37:04,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:37:04,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 08:37:04,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:37:04,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 08:37:04,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:37:04,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363334134] [2021-11-07 08:37:04,758 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 08:37:04,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089893697] [2021-11-07 08:37:04,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089893697] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:37:04,758 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:37:04,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:37:04,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96922462] [2021-11-07 08:37:04,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:37:04,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:37:04,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:37:04,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:37:04,761 INFO L87 Difference]: Start difference. First operand 79 states and 87 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 08:37:06,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:37:06,785 INFO L93 Difference]: Finished difference Result 96 states and 104 transitions. [2021-11-07 08:37:06,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:37:06,785 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 08:37:06,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:37:06,786 INFO L225 Difference]: With dead ends: 96 [2021-11-07 08:37:06,786 INFO L226 Difference]: Without dead ends: 90 [2021-11-07 08:37:06,786 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:37:06,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-07 08:37:06,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 75. [2021-11-07 08:37:06,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 66 states have (on average 1.2272727272727273) internal successors, (81), 74 states have internal predecessors, (81), 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 08:37:06,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 81 transitions. [2021-11-07 08:37:06,796 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 81 transitions. Word has length 15 [2021-11-07 08:37:06,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:37:06,797 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 81 transitions. [2021-11-07 08:37:06,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 08:37:06,797 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 81 transitions. [2021-11-07 08:37:06,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-07 08:37:06,798 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:37:06,798 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:37:06,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12dd33ad-d7f3-4a75-b648-1d5ffa7676ca/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-07 08:37:07,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12dd33ad-d7f3-4a75-b648-1d5ffa7676ca/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:37:07,002 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2021-11-07 08:37:07,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:37:07,003 INFO L85 PathProgramCache]: Analyzing trace with hash 261056772, now seen corresponding path program 1 times [2021-11-07 08:37:07,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:37:07,003 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890933578] [2021-11-07 08:37:07,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:37:07,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:37:07,014 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-07 08:37:07,019 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1109696637] [2021-11-07 08:37:07,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:37:07,019 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:37:07,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12dd33ad-d7f3-4a75-b648-1d5ffa7676ca/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:37:07,021 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12dd33ad-d7f3-4a75-b648-1d5ffa7676ca/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:37:07,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12dd33ad-d7f3-4a75-b648-1d5ffa7676ca/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process