./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-new/count_by_nondet.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b00a64e-1690-48e3-a736-3ebc5c55b938/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b00a64e-1690-48e3-a736-3ebc5c55b938/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b00a64e-1690-48e3-a736-3ebc5c55b938/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b00a64e-1690-48e3-a736-3ebc5c55b938/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-new/count_by_nondet.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b00a64e-1690-48e3-a736-3ebc5c55b938/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b00a64e-1690-48e3-a736-3ebc5c55b938/bin/uautomizer-YU5uOKAj3y --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 3467a31f3cd19e731a18eaf7789079f202f3b29e437ef24ddd0458f09610424d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 17:35:04,656 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 17:35:04,659 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 17:35:04,710 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 17:35:04,711 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 17:35:04,715 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 17:35:04,716 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 17:35:04,720 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 17:35:04,723 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 17:35:04,728 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 17:35:04,730 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 17:35:04,731 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 17:35:04,732 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 17:35:04,735 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 17:35:04,737 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 17:35:04,741 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 17:35:04,742 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 17:35:04,743 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 17:35:04,746 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 17:35:04,753 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 17:35:04,755 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 17:35:04,757 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 17:35:04,760 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 17:35:04,761 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 17:35:04,767 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 17:35:04,768 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 17:35:04,768 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 17:35:04,770 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 17:35:04,771 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 17:35:04,772 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 17:35:04,773 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 17:35:04,774 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 17:35:04,776 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 17:35:04,777 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 17:35:04,779 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 17:35:04,779 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 17:35:04,780 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 17:35:04,780 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 17:35:04,780 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 17:35:04,781 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 17:35:04,782 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 17:35:04,783 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b00a64e-1690-48e3-a736-3ebc5c55b938/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-13 17:35:04,825 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 17:35:04,825 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 17:35:04,826 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 17:35:04,826 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 17:35:04,827 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 17:35:04,827 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 17:35:04,828 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 17:35:04,828 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 17:35:04,828 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 17:35:04,828 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 17:35:04,829 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 17:35:04,829 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 17:35:04,829 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 17:35:04,829 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 17:35:04,830 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 17:35:04,830 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 17:35:04,830 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 17:35:04,830 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 17:35:04,831 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 17:35:04,831 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 17:35:04,831 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 17:35:04,831 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 17:35:04,831 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 17:35:04,832 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 17:35:04,832 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 17:35:04,832 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 17:35:04,832 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 17:35:04,833 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 17:35:04,833 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 17:35:04,833 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 17:35:04,833 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 17:35:04,834 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 17:35:04,834 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 17:35:04,834 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 17:35:04,834 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_8b00a64e-1690-48e3-a736-3ebc5c55b938/bin/uautomizer-YU5uOKAj3y/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b00a64e-1690-48e3-a736-3ebc5c55b938/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3467a31f3cd19e731a18eaf7789079f202f3b29e437ef24ddd0458f09610424d [2021-11-13 17:35:05,102 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 17:35:05,122 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 17:35:05,125 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 17:35:05,127 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 17:35:05,128 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 17:35:05,129 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b00a64e-1690-48e3-a736-3ebc5c55b938/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/loop-new/count_by_nondet.i [2021-11-13 17:35:05,197 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b00a64e-1690-48e3-a736-3ebc5c55b938/bin/uautomizer-YU5uOKAj3y/data/617b1c0cc/528ded0fdff34e17a80e5efa6361da7c/FLAG68f65b572 [2021-11-13 17:35:05,641 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 17:35:05,642 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b00a64e-1690-48e3-a736-3ebc5c55b938/sv-benchmarks/c/loop-new/count_by_nondet.i [2021-11-13 17:35:05,648 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b00a64e-1690-48e3-a736-3ebc5c55b938/bin/uautomizer-YU5uOKAj3y/data/617b1c0cc/528ded0fdff34e17a80e5efa6361da7c/FLAG68f65b572 [2021-11-13 17:35:06,034 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b00a64e-1690-48e3-a736-3ebc5c55b938/bin/uautomizer-YU5uOKAj3y/data/617b1c0cc/528ded0fdff34e17a80e5efa6361da7c [2021-11-13 17:35:06,036 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 17:35:06,038 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 17:35:06,057 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 17:35:06,057 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 17:35:06,061 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 17:35:06,062 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 05:35:06" (1/1) ... [2021-11-13 17:35:06,063 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31839441 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:35:06, skipping insertion in model container [2021-11-13 17:35:06,063 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 05:35:06" (1/1) ... [2021-11-13 17:35:06,071 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 17:35:06,086 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 17:35:06,266 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_8b00a64e-1690-48e3-a736-3ebc5c55b938/sv-benchmarks/c/loop-new/count_by_nondet.i[891,904] [2021-11-13 17:35:06,276 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 17:35:06,284 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 17:35:06,297 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_8b00a64e-1690-48e3-a736-3ebc5c55b938/sv-benchmarks/c/loop-new/count_by_nondet.i[891,904] [2021-11-13 17:35:06,300 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 17:35:06,313 INFO L208 MainTranslator]: Completed translation [2021-11-13 17:35:06,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:35:06 WrapperNode [2021-11-13 17:35:06,314 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 17:35:06,315 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 17:35:06,316 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 17:35:06,316 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 17:35:06,323 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:35:06" (1/1) ... [2021-11-13 17:35:06,330 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:35:06" (1/1) ... [2021-11-13 17:35:06,346 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 17:35:06,347 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 17:35:06,347 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 17:35:06,347 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 17:35:06,355 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:35:06" (1/1) ... [2021-11-13 17:35:06,355 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:35:06" (1/1) ... [2021-11-13 17:35:06,357 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:35:06" (1/1) ... [2021-11-13 17:35:06,357 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:35:06" (1/1) ... [2021-11-13 17:35:06,360 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:35:06" (1/1) ... [2021-11-13 17:35:06,363 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:35:06" (1/1) ... [2021-11-13 17:35:06,364 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:35:06" (1/1) ... [2021-11-13 17:35:06,366 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 17:35:06,367 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 17:35:06,367 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 17:35:06,367 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 17:35:06,368 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:35:06" (1/1) ... [2021-11-13 17:35:06,375 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 17:35:06,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b00a64e-1690-48e3-a736-3ebc5c55b938/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:35:06,398 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b00a64e-1690-48e3-a736-3ebc5c55b938/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 17:35:06,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b00a64e-1690-48e3-a736-3ebc5c55b938/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 17:35:06,451 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 17:35:06,452 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 17:35:06,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 17:35:06,452 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 17:35:06,670 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 17:35:06,672 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-13 17:35:06,679 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 05:35:06 BoogieIcfgContainer [2021-11-13 17:35:06,680 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 17:35:06,684 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 17:35:06,687 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 17:35:06,690 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 17:35:06,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 05:35:06" (1/3) ... [2021-11-13 17:35:06,691 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4690fa86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 05:35:06, skipping insertion in model container [2021-11-13 17:35:06,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:35:06" (2/3) ... [2021-11-13 17:35:06,692 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4690fa86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 05:35:06, skipping insertion in model container [2021-11-13 17:35:06,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 05:35:06" (3/3) ... [2021-11-13 17:35:06,693 INFO L111 eAbstractionObserver]: Analyzing ICFG count_by_nondet.i [2021-11-13 17:35:06,698 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 17:35:06,699 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 17:35:06,742 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 17:35:06,749 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 [2021-11-13 17:35:06,749 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 17:35:06,763 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 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) [2021-11-13 17:35:06,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-13 17:35:06,768 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:35:06,768 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-13 17:35:06,769 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:35:06,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:35:06,774 INFO L85 PathProgramCache]: Analyzing trace with hash 889906919, now seen corresponding path program 1 times [2021-11-13 17:35:06,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:35:06,791 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507402360] [2021-11-13 17:35:06,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:35:06,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:35:06,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:35:06,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:35:06,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:35:06,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507402360] [2021-11-13 17:35:06,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507402360] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:35:06,940 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:35:06,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 17:35:06,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658137310] [2021-11-13 17:35:06,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:35:06,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-13 17:35:06,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:35:06,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-13 17:35:06,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 17:35:06,973 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 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) [2021-11-13 17:35:06,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:35:06,987 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2021-11-13 17:35:07,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-13 17:35:07,002 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 [2021-11-13 17:35:07,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:35:07,009 INFO L225 Difference]: With dead ends: 20 [2021-11-13 17:35:07,009 INFO L226 Difference]: Without dead ends: 8 [2021-11-13 17:35:07,012 INFO L932 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 [2021-11-13 17:35:07,015 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.43ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-13 17:35:07,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.43ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-13 17:35:07,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-11-13 17:35:07,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-11-13 17:35:07,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 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) [2021-11-13 17:35:07,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2021-11-13 17:35:07,045 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2021-11-13 17:35:07,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:35:07,045 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2021-11-13 17:35:07,046 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) [2021-11-13 17:35:07,046 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2021-11-13 17:35:07,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-13 17:35:07,046 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:35:07,046 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-13 17:35:07,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 17:35:07,047 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:35:07,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:35:07,048 INFO L85 PathProgramCache]: Analyzing trace with hash 889638800, now seen corresponding path program 1 times [2021-11-13 17:35:07,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:35:07,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315928743] [2021-11-13 17:35:07,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:35:07,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:35:07,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:35:07,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:35:07,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:35:07,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315928743] [2021-11-13 17:35:07,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315928743] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:35:07,106 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:35:07,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 17:35:07,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832296290] [2021-11-13 17:35:07,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:35:07,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:35:07,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:35:07,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:35:07,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:35:07,109 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 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) [2021-11-13 17:35:07,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:35:07,136 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2021-11-13 17:35:07,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:35:07,137 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 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 [2021-11-13 17:35:07,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:35:07,138 INFO L225 Difference]: With dead ends: 14 [2021-11-13 17:35:07,138 INFO L226 Difference]: Without dead ends: 10 [2021-11-13 17:35:07,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:35:07,140 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.44ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.58ms IncrementalHoareTripleChecker+Time [2021-11-13 17:35:07,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 10 Invalid, 5 Unknown, 0 Unchecked, 0.44ms Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 23.58ms Time] [2021-11-13 17:35:07,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-11-13 17:35:07,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2021-11-13 17:35:07,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 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) [2021-11-13 17:35:07,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-11-13 17:35:07,145 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2021-11-13 17:35:07,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:35:07,145 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-11-13 17:35:07,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 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) [2021-11-13 17:35:07,146 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-11-13 17:35:07,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-13 17:35:07,146 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:35:07,146 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:35:07,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 17:35:07,147 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:35:07,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:35:07,148 INFO L85 PathProgramCache]: Analyzing trace with hash 297537973, now seen corresponding path program 1 times [2021-11-13 17:35:07,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:35:07,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023921479] [2021-11-13 17:35:07,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:35:07,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:35:07,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:35:07,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:35:07,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:35:07,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023921479] [2021-11-13 17:35:07,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023921479] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:35:07,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831278103] [2021-11-13 17:35:07,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:35:07,227 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:35:07,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b00a64e-1690-48e3-a736-3ebc5c55b938/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:35:07,234 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b00a64e-1690-48e3-a736-3ebc5c55b938/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:35:07,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b00a64e-1690-48e3-a736-3ebc5c55b938/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 17:35:07,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:35:07,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 17:35:07,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:35:07,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:35:07,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:35:07,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:35:07,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831278103] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:35:07,447 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 17:35:07,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2021-11-13 17:35:07,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93737032] [2021-11-13 17:35:07,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 17:35:07,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:35:07,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:35:07,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:35:07,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:35:07,463 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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) [2021-11-13 17:35:07,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:35:07,478 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2021-11-13 17:35:07,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:35:07,479 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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 8 [2021-11-13 17:35:07,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:35:07,480 INFO L225 Difference]: With dead ends: 15 [2021-11-13 17:35:07,480 INFO L226 Difference]: Without dead ends: 11 [2021-11-13 17:35:07,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:35:07,482 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.50ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.65ms IncrementalHoareTripleChecker+Time [2021-11-13 17:35:07,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 14 Invalid, 11 Unknown, 0 Unchecked, 0.50ms Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 10.65ms Time] [2021-11-13 17:35:07,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-11-13 17:35:07,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-11-13 17:35:07,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.1) internal successors, (11), 10 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) [2021-11-13 17:35:07,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2021-11-13 17:35:07,487 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2021-11-13 17:35:07,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:35:07,487 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2021-11-13 17:35:07,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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) [2021-11-13 17:35:07,488 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2021-11-13 17:35:07,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-13 17:35:07,489 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:35:07,489 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-11-13 17:35:07,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b00a64e-1690-48e3-a736-3ebc5c55b938/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 17:35:07,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b00a64e-1690-48e3-a736-3ebc5c55b938/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:35:07,711 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:35:07,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:35:07,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1775673702, now seen corresponding path program 2 times [2021-11-13 17:35:07,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:35:07,714 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862195665] [2021-11-13 17:35:07,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:35:07,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:35:07,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:35:07,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:35:07,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:35:07,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862195665] [2021-11-13 17:35:07,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862195665] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:35:07,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490357170] [2021-11-13 17:35:07,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 17:35:07,834 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:35:07,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b00a64e-1690-48e3-a736-3ebc5c55b938/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:35:07,837 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b00a64e-1690-48e3-a736-3ebc5c55b938/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:35:07,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b00a64e-1690-48e3-a736-3ebc5c55b938/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 17:35:07,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 17:35:07,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 17:35:07,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 17:35:07,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:35:07,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:35:07,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:35:08,066 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:35:08,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490357170] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:35:08,070 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 17:35:08,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-11-13 17:35:08,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249560992] [2021-11-13 17:35:08,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 17:35:08,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-13 17:35:08,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:35:08,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-13 17:35:08,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-13 17:35:08,073 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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) [2021-11-13 17:35:08,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:35:08,153 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2021-11-13 17:35:08,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-13 17:35:08,154 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-13 17:35:08,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:35:08,155 INFO L225 Difference]: With dead ends: 30 [2021-11-13 17:35:08,155 INFO L226 Difference]: Without dead ends: 20 [2021-11-13 17:35:08,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-11-13 17:35:08,157 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 17 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.26ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.00ms IncrementalHoareTripleChecker+Time [2021-11-13 17:35:08,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 29 Invalid, 26 Unknown, 0 Unchecked, 1.26ms Time], IncrementalHoareTripleChecker [9 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 35.00ms Time] [2021-11-13 17:35:08,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-13 17:35:08,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2021-11-13 17:35:08,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 18 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:35:08,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2021-11-13 17:35:08,163 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 10 [2021-11-13 17:35:08,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:35:08,163 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2021-11-13 17:35:08,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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) [2021-11-13 17:35:08,164 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2021-11-13 17:35:08,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-13 17:35:08,164 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:35:08,164 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2021-11-13 17:35:08,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b00a64e-1690-48e3-a736-3ebc5c55b938/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 17:35:08,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b00a64e-1690-48e3-a736-3ebc5c55b938/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:35:08,377 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:35:08,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:35:08,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1714864722, now seen corresponding path program 3 times [2021-11-13 17:35:08,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:35:08,378 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137969837] [2021-11-13 17:35:08,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:35:08,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:35:08,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:35:08,547 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:35:08,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:35:08,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137969837] [2021-11-13 17:35:08,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137969837] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:35:08,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981293184] [2021-11-13 17:35:08,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 17:35:08,559 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:35:08,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b00a64e-1690-48e3-a736-3ebc5c55b938/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:35:08,565 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b00a64e-1690-48e3-a736-3ebc5c55b938/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:35:08,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b00a64e-1690-48e3-a736-3ebc5c55b938/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 17:35:08,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-13 17:35:08,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 17:35:08,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-13 17:35:08,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:35:08,759 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:35:08,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:35:08,952 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:35:08,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981293184] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:35:08,952 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 17:35:08,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2021-11-13 17:35:08,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235680319] [2021-11-13 17:35:08,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 17:35:08,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-13 17:35:08,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:35:08,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-13 17:35:08,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2021-11-13 17:35:08,961 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:35:09,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:35:09,122 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2021-11-13 17:35:09,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-13 17:35:09,123 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-13 17:35:09,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:35:09,125 INFO L225 Difference]: With dead ends: 54 [2021-11-13 17:35:09,126 INFO L226 Difference]: Without dead ends: 36 [2021-11-13 17:35:09,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=237, Invalid=465, Unknown=0, NotChecked=0, Total=702 [2021-11-13 17:35:09,130 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 49 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.46ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.93ms IncrementalHoareTripleChecker+Time [2021-11-13 17:35:09,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 41 Invalid, 48 Unknown, 0 Unchecked, 4.46ms Time], IncrementalHoareTripleChecker [16 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 37.93ms Time] [2021-11-13 17:35:09,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-13 17:35:09,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2021-11-13 17:35:09,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 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) [2021-11-13 17:35:09,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2021-11-13 17:35:09,146 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 18 [2021-11-13 17:35:09,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:35:09,147 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2021-11-13 17:35:09,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:35:09,147 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2021-11-13 17:35:09,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-13 17:35:09,149 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:35:09,149 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1] [2021-11-13 17:35:09,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b00a64e-1690-48e3-a736-3ebc5c55b938/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-13 17:35:09,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b00a64e-1690-48e3-a736-3ebc5c55b938/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:35:09,377 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:35:09,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:35:09,377 INFO L85 PathProgramCache]: Analyzing trace with hash -340131882, now seen corresponding path program 4 times [2021-11-13 17:35:09,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:35:09,378 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511524508] [2021-11-13 17:35:09,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:35:09,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:35:09,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:35:09,669 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:35:09,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:35:09,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511524508] [2021-11-13 17:35:09,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511524508] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:35:09,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821936392] [2021-11-13 17:35:09,670 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 17:35:09,670 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:35:09,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b00a64e-1690-48e3-a736-3ebc5c55b938/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:35:09,672 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b00a64e-1690-48e3-a736-3ebc5c55b938/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:35:09,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b00a64e-1690-48e3-a736-3ebc5c55b938/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 17:35:09,728 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 17:35:09,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 17:35:09,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-13 17:35:09,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:35:09,845 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:35:09,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:35:10,303 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:35:10,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821936392] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:35:10,304 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 17:35:10,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 35 [2021-11-13 17:35:10,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411258084] [2021-11-13 17:35:10,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 17:35:10,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-13 17:35:10,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:35:10,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-13 17:35:10,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2021-11-13 17:35:10,310 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:35:10,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:35:10,668 INFO L93 Difference]: Finished difference Result 102 states and 117 transitions. [2021-11-13 17:35:10,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-13 17:35:10,670 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-13 17:35:10,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:35:10,673 INFO L225 Difference]: With dead ends: 102 [2021-11-13 17:35:10,673 INFO L226 Difference]: Without dead ends: 68 [2021-11-13 17:35:10,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=853, Invalid=1697, Unknown=0, NotChecked=0, Total=2550 [2021-11-13 17:35:10,679 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 110 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 51.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.71ms SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 62.19ms IncrementalHoareTripleChecker+Time [2021-11-13 17:35:10,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 77 Invalid, 88 Unknown, 0 Unchecked, 8.71ms Time], IncrementalHoareTripleChecker [32 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 62.19ms Time] [2021-11-13 17:35:10,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-13 17:35:10,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2021-11-13 17:35:10,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.0151515151515151) internal successors, (67), 66 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) [2021-11-13 17:35:10,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2021-11-13 17:35:10,704 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 34 [2021-11-13 17:35:10,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:35:10,705 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2021-11-13 17:35:10,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:35:10,706 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2021-11-13 17:35:10,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-13 17:35:10,710 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:35:10,710 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1] [2021-11-13 17:35:10,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b00a64e-1690-48e3-a736-3ebc5c55b938/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-13 17:35:10,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b00a64e-1690-48e3-a736-3ebc5c55b938/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:35:10,929 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:35:10,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:35:10,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1787794470, now seen corresponding path program 5 times [2021-11-13 17:35:10,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:35:10,930 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962876794] [2021-11-13 17:35:10,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:35:10,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:35:11,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:35:11,673 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:35:11,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:35:11,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962876794] [2021-11-13 17:35:11,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962876794] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:35:11,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767993053] [2021-11-13 17:35:11,675 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 17:35:11,675 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:35:11,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b00a64e-1690-48e3-a736-3ebc5c55b938/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:35:11,680 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b00a64e-1690-48e3-a736-3ebc5c55b938/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:35:11,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b00a64e-1690-48e3-a736-3ebc5c55b938/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-13 17:35:11,793 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2021-11-13 17:35:11,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 17:35:11,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-13 17:35:11,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:35:12,026 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:35:12,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:35:13,483 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:35:13,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767993053] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:35:13,484 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 17:35:13,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 67 [2021-11-13 17:35:13,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701457564] [2021-11-13 17:35:13,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 17:35:13,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-11-13 17:35:13,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:35:13,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-11-13 17:35:13,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2085, Invalid=2337, Unknown=0, NotChecked=0, Total=4422 [2021-11-13 17:35:13,490 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand has 67 states, 67 states have (on average 2.0) internal successors, (134), 67 states have internal predecessors, (134), 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) [2021-11-13 17:35:14,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:35:14,539 INFO L93 Difference]: Finished difference Result 198 states and 229 transitions. [2021-11-13 17:35:14,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-11-13 17:35:14,539 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.0) internal successors, (134), 67 states have internal predecessors, (134), 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 66 [2021-11-13 17:35:14,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:35:14,541 INFO L225 Difference]: With dead ends: 198 [2021-11-13 17:35:14,541 INFO L226 Difference]: Without dead ends: 132 [2021-11-13 17:35:14,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1208 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3237, Invalid=6465, Unknown=0, NotChecked=0, Total=9702 [2021-11-13 17:35:14,547 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 323 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 103.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.76ms SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 131.68ms IncrementalHoareTripleChecker+Time [2021-11-13 17:35:14,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 123 Invalid, 173 Unknown, 0 Unchecked, 3.76ms Time], IncrementalHoareTripleChecker [67 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 131.68ms Time] [2021-11-13 17:35:14,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-11-13 17:35:14,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2021-11-13 17:35:14,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.0076923076923077) internal successors, (131), 130 states have internal predecessors, (131), 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) [2021-11-13 17:35:14,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2021-11-13 17:35:14,559 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 66 [2021-11-13 17:35:14,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:35:14,560 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2021-11-13 17:35:14,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.0) internal successors, (134), 67 states have internal predecessors, (134), 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) [2021-11-13 17:35:14,561 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2021-11-13 17:35:14,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-13 17:35:14,563 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:35:14,563 INFO L514 BasicCegarLoop]: trace histogram [62, 62, 1, 1, 1, 1, 1, 1] [2021-11-13 17:35:14,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b00a64e-1690-48e3-a736-3ebc5c55b938/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-13 17:35:14,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b00a64e-1690-48e3-a736-3ebc5c55b938/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-13 17:35:14,789 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:35:14,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:35:14,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1249182522, now seen corresponding path program 6 times [2021-11-13 17:35:14,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:35:14,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808821373] [2021-11-13 17:35:14,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:35:14,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:35:14,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:35:16,688 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:35:16,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:35:16,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808821373] [2021-11-13 17:35:16,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808821373] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:35:16,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731889830] [2021-11-13 17:35:16,691 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 17:35:16,691 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:35:16,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b00a64e-1690-48e3-a736-3ebc5c55b938/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:35:16,692 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b00a64e-1690-48e3-a736-3ebc5c55b938/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:35:16,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b00a64e-1690-48e3-a736-3ebc5c55b938/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-13 17:35:16,958 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 63 check-sat command(s) [2021-11-13 17:35:16,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 17:35:16,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 719 conjuncts, 66 conjunts are in the unsatisfiable core [2021-11-13 17:35:16,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:35:17,337 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:35:17,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:35:21,921 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:35:21,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731889830] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:35:21,922 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 17:35:21,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66, 66] total 131 [2021-11-13 17:35:21,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401378682] [2021-11-13 17:35:21,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 17:35:21,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2021-11-13 17:35:21,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:35:21,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2021-11-13 17:35:21,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8261, Invalid=8769, Unknown=0, NotChecked=0, Total=17030 [2021-11-13 17:35:21,931 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand has 131 states, 131 states have (on average 2.0) internal successors, (262), 131 states have internal predecessors, (262), 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) [2021-11-13 17:35:25,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:35:25,052 INFO L93 Difference]: Finished difference Result 390 states and 453 transitions. [2021-11-13 17:35:25,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2021-11-13 17:35:25,053 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 2.0) internal successors, (262), 131 states have internal predecessors, (262), 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 130 [2021-11-13 17:35:25,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:35:25,055 INFO L225 Difference]: With dead ends: 390 [2021-11-13 17:35:25,055 INFO L226 Difference]: Without dead ends: 260 [2021-11-13 17:35:25,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 194 SyntacticMatches, 1 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4472 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=12613, Invalid=25217, Unknown=0, NotChecked=0, Total=37830 [2021-11-13 17:35:25,070 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 623 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 234.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 623 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.34ms SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 317.75ms IncrementalHoareTripleChecker+Time [2021-11-13 17:35:25,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [623 Valid, 225 Invalid, 331 Unknown, 0 Unchecked, 6.34ms Time], IncrementalHoareTripleChecker [130 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 317.75ms Time] [2021-11-13 17:35:25,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-11-13 17:35:25,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 259. [2021-11-13 17:35:25,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 1.003875968992248) internal successors, (259), 258 states have internal predecessors, (259), 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) [2021-11-13 17:35:25,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 259 transitions. [2021-11-13 17:35:25,113 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 259 transitions. Word has length 130 [2021-11-13 17:35:25,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:35:25,114 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 259 transitions. [2021-11-13 17:35:25,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 2.0) internal successors, (262), 131 states have internal predecessors, (262), 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) [2021-11-13 17:35:25,114 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 259 transitions. [2021-11-13 17:35:25,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2021-11-13 17:35:25,126 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:35:25,126 INFO L514 BasicCegarLoop]: trace histogram [126, 126, 1, 1, 1, 1, 1, 1] [2021-11-13 17:35:25,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b00a64e-1690-48e3-a736-3ebc5c55b938/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-13 17:35:25,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b00a64e-1690-48e3-a736-3ebc5c55b938/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:35:25,341 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:35:25,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:35:25,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1933390330, now seen corresponding path program 7 times [2021-11-13 17:35:25,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:35:25,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289309754] [2021-11-13 17:35:25,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:35:25,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:35:25,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:35:31,593 INFO L134 CoverageAnalysis]: Checked inductivity of 15876 backedges. 0 proven. 15876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:35:31,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:35:31,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289309754] [2021-11-13 17:35:31,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289309754] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:35:31,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345039358] [2021-11-13 17:35:31,594 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 17:35:31,594 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:35:31,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b00a64e-1690-48e3-a736-3ebc5c55b938/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:35:31,603 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b00a64e-1690-48e3-a736-3ebc5c55b938/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:35:31,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b00a64e-1690-48e3-a736-3ebc5c55b938/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-13 17:35:31,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:35:31,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 1423 conjuncts, 130 conjunts are in the unsatisfiable core [2021-11-13 17:35:31,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:35:32,673 INFO L134 CoverageAnalysis]: Checked inductivity of 15876 backedges. 0 proven. 15876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:35:32,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:35:48,805 INFO L134 CoverageAnalysis]: Checked inductivity of 15876 backedges. 0 proven. 15876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:35:48,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345039358] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:35:48,805 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 17:35:48,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [130, 130, 130] total 259 [2021-11-13 17:35:48,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068812877] [2021-11-13 17:35:48,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 17:35:48,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 259 states [2021-11-13 17:35:48,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:35:48,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 259 interpolants. [2021-11-13 17:35:48,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32901, Invalid=33921, Unknown=0, NotChecked=0, Total=66822 [2021-11-13 17:35:48,821 INFO L87 Difference]: Start difference. First operand 259 states and 259 transitions. Second operand has 259 states, 259 states have (on average 2.0) internal successors, (518), 259 states have internal predecessors, (518), 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) [2021-11-13 17:36:00,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:36:00,535 INFO L93 Difference]: Finished difference Result 774 states and 901 transitions. [2021-11-13 17:36:00,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2021-11-13 17:36:00,536 INFO L78 Accepts]: Start accepts. Automaton has has 259 states, 259 states have (on average 2.0) internal successors, (518), 259 states have internal predecessors, (518), 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 258 [2021-11-13 17:36:00,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:36:00,540 INFO L225 Difference]: With dead ends: 774 [2021-11-13 17:36:00,540 INFO L226 Difference]: Without dead ends: 516 [2021-11-13 17:36:00,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 772 GetRequests, 386 SyntacticMatches, 1 SemanticMatches, 385 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17144 ImplicationChecksByTransitivity, 29.4s TimeCoverageRelationStatistics Valid=49797, Invalid=99585, Unknown=0, NotChecked=0, Total=149382 [2021-11-13 17:36:00,554 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 1242 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 345.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1242 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.41ms SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 429.00ms IncrementalHoareTripleChecker+Time [2021-11-13 17:36:00,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1242 Valid, 414 Invalid, 655 Unknown, 0 Unchecked, 12.41ms Time], IncrementalHoareTripleChecker [258 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 429.00ms Time] [2021-11-13 17:36:00,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-11-13 17:36:00,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 515. [2021-11-13 17:36:00,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 1.0019455252918288) internal successors, (515), 514 states have internal predecessors, (515), 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) [2021-11-13 17:36:00,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 515 transitions. [2021-11-13 17:36:00,579 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 515 transitions. Word has length 258 [2021-11-13 17:36:00,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:36:00,580 INFO L470 AbstractCegarLoop]: Abstraction has 515 states and 515 transitions. [2021-11-13 17:36:00,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 259 states, 259 states have (on average 2.0) internal successors, (518), 259 states have internal predecessors, (518), 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) [2021-11-13 17:36:00,581 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 515 transitions. [2021-11-13 17:36:00,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 515 [2021-11-13 17:36:00,590 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:36:00,590 INFO L514 BasicCegarLoop]: trace histogram [254, 254, 1, 1, 1, 1, 1, 1] [2021-11-13 17:36:00,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b00a64e-1690-48e3-a736-3ebc5c55b938/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-13 17:36:00,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b00a64e-1690-48e3-a736-3ebc5c55b938/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:36:00,797 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:36:00,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:36:00,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1607044986, now seen corresponding path program 8 times [2021-11-13 17:36:00,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:36:00,798 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81080103] [2021-11-13 17:36:00,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:36:00,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:36:02,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:36:23,770 INFO L134 CoverageAnalysis]: Checked inductivity of 64516 backedges. 0 proven. 64516 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:36:23,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:36:23,771 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81080103] [2021-11-13 17:36:23,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81080103] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:36:23,771 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10434285] [2021-11-13 17:36:23,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 17:36:23,772 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:36:23,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b00a64e-1690-48e3-a736-3ebc5c55b938/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:36:23,793 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b00a64e-1690-48e3-a736-3ebc5c55b938/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:36:23,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b00a64e-1690-48e3-a736-3ebc5c55b938/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-13 17:36:24,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 17:36:24,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 17:36:24,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 2831 conjuncts, 258 conjunts are in the unsatisfiable core [2021-11-13 17:36:24,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:36:25,468 INFO L134 CoverageAnalysis]: Checked inductivity of 64516 backedges. 0 proven. 64516 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:36:25,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:37:28,688 INFO L134 CoverageAnalysis]: Checked inductivity of 64516 backedges. 0 proven. 64516 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:37:28,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10434285] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:37:28,688 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 17:37:28,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [258, 258, 258] total 515 [2021-11-13 17:37:28,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676530095] [2021-11-13 17:37:28,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 17:37:28,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 515 states [2021-11-13 17:37:28,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:37:28,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 515 interpolants. [2021-11-13 17:37:28,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131333, Invalid=133377, Unknown=0, NotChecked=0, Total=264710 [2021-11-13 17:37:28,719 INFO L87 Difference]: Start difference. First operand 515 states and 515 transitions. Second operand has 515 states, 515 states have (on average 2.0) internal successors, (1030), 515 states have internal predecessors, (1030), 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) [2021-11-13 17:38:36,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:38:36,225 INFO L93 Difference]: Finished difference Result 1542 states and 1797 transitions. [2021-11-13 17:38:36,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 768 states. [2021-11-13 17:38:36,226 INFO L78 Accepts]: Start accepts. Automaton has has 515 states, 515 states have (on average 2.0) internal successors, (1030), 515 states have internal predecessors, (1030), 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 514 [2021-11-13 17:38:36,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:38:36,232 INFO L225 Difference]: With dead ends: 1542 [2021-11-13 17:38:36,233 INFO L226 Difference]: Without dead ends: 1028 [2021-11-13 17:38:36,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1540 GetRequests, 770 SyntacticMatches, 1 SemanticMatches, 769 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67064 ImplicationChecksByTransitivity, 116.9s TimeCoverageRelationStatistics Valid=197893, Invalid=395777, Unknown=0, NotChecked=0, Total=593670 [2021-11-13 17:38:36,273 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 3522 mSDsluCounter, 790 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 516 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 671.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3522 SdHoareTripleChecker+Valid, 796 SdHoareTripleChecker+Invalid, 1294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 35.47ms SdHoareTripleChecker+Time, 516 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 913.88ms IncrementalHoareTripleChecker+Time [2021-11-13 17:38:36,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3522 Valid, 796 Invalid, 1294 Unknown, 0 Unchecked, 35.47ms Time], IncrementalHoareTripleChecker [516 Valid, 778 Invalid, 0 Unknown, 0 Unchecked, 913.88ms Time] [2021-11-13 17:38:36,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1028 states. [2021-11-13 17:38:36,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1028 to 1027. [2021-11-13 17:38:36,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1027 states, 1026 states have (on average 1.0009746588693957) internal successors, (1027), 1026 states have internal predecessors, (1027), 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) [2021-11-13 17:38:36,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1027 states to 1027 states and 1027 transitions. [2021-11-13 17:38:36,308 INFO L78 Accepts]: Start accepts. Automaton has 1027 states and 1027 transitions. Word has length 514 [2021-11-13 17:38:36,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:38:36,309 INFO L470 AbstractCegarLoop]: Abstraction has 1027 states and 1027 transitions. [2021-11-13 17:38:36,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 515 states, 515 states have (on average 2.0) internal successors, (1030), 515 states have internal predecessors, (1030), 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) [2021-11-13 17:38:36,311 INFO L276 IsEmpty]: Start isEmpty. Operand 1027 states and 1027 transitions. [2021-11-13 17:38:36,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1027 [2021-11-13 17:38:36,351 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:38:36,352 INFO L514 BasicCegarLoop]: trace histogram [510, 510, 1, 1, 1, 1, 1, 1] [2021-11-13 17:38:36,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b00a64e-1690-48e3-a736-3ebc5c55b938/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-13 17:38:36,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b00a64e-1690-48e3-a736-3ebc5c55b938/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-13 17:38:36,581 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:38:36,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:38:36,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1529722246, now seen corresponding path program 9 times [2021-11-13 17:38:36,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:38:36,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272039233] [2021-11-13 17:38:36,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:38:36,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:38:41,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:40:06,388 INFO L134 CoverageAnalysis]: Checked inductivity of 260100 backedges. 0 proven. 260100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:40:06,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:40:06,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272039233] [2021-11-13 17:40:06,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272039233] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:40:06,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984218879] [2021-11-13 17:40:06,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 17:40:06,389 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:40:06,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b00a64e-1690-48e3-a736-3ebc5c55b938/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:40:06,391 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b00a64e-1690-48e3-a736-3ebc5c55b938/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:40:06,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b00a64e-1690-48e3-a736-3ebc5c55b938/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-13 17:40:15,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 511 check-sat command(s) [2021-11-13 17:40:15,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 17:40:15,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 5647 conjuncts, 514 conjunts are in the unsatisfiable core [2021-11-13 17:40:15,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:40:18,295 INFO L134 CoverageAnalysis]: Checked inductivity of 260100 backedges. 0 proven. 260100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:40:18,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:44:36,844 INFO L134 CoverageAnalysis]: Checked inductivity of 260100 backedges. 0 proven. 260100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:44:36,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984218879] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:44:36,844 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 17:44:36,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [514, 514, 514] total 1027 [2021-11-13 17:44:36,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806728401] [2021-11-13 17:44:36,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 17:44:36,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 1027 states [2021-11-13 17:44:36,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:44:36,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 1027 interpolants. [2021-11-13 17:44:36,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=524805, Invalid=528897, Unknown=0, NotChecked=0, Total=1053702 [2021-11-13 17:44:36,971 INFO L87 Difference]: Start difference. First operand 1027 states and 1027 transitions. Second operand has 1027 states, 1027 states have (on average 2.0) internal successors, (2054), 1027 states have internal predecessors, (2054), 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)