./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU --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 2e1c46549da470f14361a9b2a5fb79d079bbffb4006138f4fef05b9b152f9be7 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 23:12:46,497 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 23:12:46,499 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 23:12:46,533 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 23:12:46,534 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 23:12:46,539 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 23:12:46,542 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 23:12:46,546 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 23:12:46,549 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 23:12:46,554 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 23:12:46,555 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 23:12:46,557 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 23:12:46,558 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 23:12:46,561 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 23:12:46,563 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 23:12:46,565 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 23:12:46,567 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 23:12:46,568 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 23:12:46,573 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 23:12:46,582 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 23:12:46,584 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 23:12:46,586 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 23:12:46,589 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 23:12:46,591 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 23:12:46,600 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 23:12:46,601 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 23:12:46,601 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 23:12:46,603 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 23:12:46,604 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 23:12:46,606 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 23:12:46,607 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 23:12:46,608 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 23:12:46,610 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 23:12:46,612 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 23:12:46,613 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 23:12:46,614 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 23:12:46,615 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 23:12:46,615 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 23:12:46,616 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 23:12:46,617 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 23:12:46,618 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 23:12:46,619 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-02 23:12:46,671 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 23:12:46,673 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 23:12:46,673 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 23:12:46,674 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 23:12:46,675 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 23:12:46,676 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 23:12:46,676 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 23:12:46,676 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 23:12:46,677 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 23:12:46,677 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 23:12:46,678 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 23:12:46,678 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 23:12:46,678 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 23:12:46,679 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 23:12:46,679 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 23:12:46,679 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 23:12:46,679 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 23:12:46,680 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 23:12:46,680 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 23:12:46,680 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 23:12:46,680 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 23:12:46,681 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 23:12:46,681 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 23:12:46,681 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 23:12:46,681 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 23:12:46,682 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 23:12:46,682 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 23:12:46,682 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 23:12:46,682 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 23:12:46,683 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 23:12:46,683 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 23:12:46,683 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 23:12:46,684 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_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e1c46549da470f14361a9b2a5fb79d079bbffb4006138f4fef05b9b152f9be7 [2021-11-02 23:12:46,995 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 23:12:47,017 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 23:12:47,020 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 23:12:47,021 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 23:12:47,022 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 23:12:47,023 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i [2021-11-02 23:12:47,099 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/data/95a2d3df6/b3fb06c8e2a74bc88ff9a59608115ea3/FLAG3dd406766 [2021-11-02 23:12:47,517 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 23:12:47,518 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i [2021-11-02 23:12:47,525 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/data/95a2d3df6/b3fb06c8e2a74bc88ff9a59608115ea3/FLAG3dd406766 [2021-11-02 23:12:47,918 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/data/95a2d3df6/b3fb06c8e2a74bc88ff9a59608115ea3 [2021-11-02 23:12:47,921 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 23:12:47,922 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 23:12:47,924 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 23:12:47,924 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 23:12:47,928 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 23:12:47,929 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:12:47" (1/1) ... [2021-11-02 23:12:47,930 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@169714fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:12:47, skipping insertion in model container [2021-11-02 23:12:47,931 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:12:47" (1/1) ... [2021-11-02 23:12:47,939 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 23:12:47,955 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 23:12:48,158 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_eb02b605-e770-4ab8-ae3e-4c9d45226469/sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i[812,825] [2021-11-02 23:12:48,194 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 23:12:48,200 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 23:12:48,212 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_eb02b605-e770-4ab8-ae3e-4c9d45226469/sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i[812,825] [2021-11-02 23:12:48,219 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 23:12:48,237 INFO L208 MainTranslator]: Completed translation [2021-11-02 23:12:48,237 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:12:48 WrapperNode [2021-11-02 23:12:48,237 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 23:12:48,238 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 23:12:48,238 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 23:12:48,238 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 23:12:48,246 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:12:48" (1/1) ... [2021-11-02 23:12:48,254 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:12:48" (1/1) ... [2021-11-02 23:12:48,273 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 23:12:48,274 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 23:12:48,274 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 23:12:48,275 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 23:12:48,283 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:12:48" (1/1) ... [2021-11-02 23:12:48,284 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:12:48" (1/1) ... [2021-11-02 23:12:48,285 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:12:48" (1/1) ... [2021-11-02 23:12:48,286 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:12:48" (1/1) ... [2021-11-02 23:12:48,291 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:12:48" (1/1) ... [2021-11-02 23:12:48,295 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:12:48" (1/1) ... [2021-11-02 23:12:48,297 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:12:48" (1/1) ... [2021-11-02 23:12:48,299 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 23:12:48,300 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 23:12:48,300 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 23:12:48,300 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 23:12:48,301 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:12:48" (1/1) ... [2021-11-02 23:12:48,313 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 23:12:48,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:12:48,344 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 23:12:48,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 23:12:48,392 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 23:12:48,392 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 23:12:48,392 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-02 23:12:48,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 23:12:48,393 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 23:12:48,393 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-02 23:12:48,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-02 23:12:48,651 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 23:12:48,651 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-11-02 23:12:48,653 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:12:48 BoogieIcfgContainer [2021-11-02 23:12:48,653 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 23:12:48,655 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 23:12:48,655 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 23:12:48,673 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 23:12:48,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 11:12:47" (1/3) ... [2021-11-02 23:12:48,674 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d93a96b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:12:48, skipping insertion in model container [2021-11-02 23:12:48,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:12:48" (2/3) ... [2021-11-02 23:12:48,674 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d93a96b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:12:48, skipping insertion in model container [2021-11-02 23:12:48,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:12:48" (3/3) ... [2021-11-02 23:12:48,676 INFO L111 eAbstractionObserver]: Analyzing ICFG flag_loopdep_simple.i [2021-11-02 23:12:48,681 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 23:12:48,681 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-02 23:12:48,738 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 23:12:48,752 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 [2021-11-02 23:12:48,752 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-02 23:12:48,764 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:48,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-02 23:12:48,770 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:12:48,770 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:12:48,771 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:12:48,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:12:48,777 INFO L85 PathProgramCache]: Analyzing trace with hash -2060710478, now seen corresponding path program 1 times [2021-11-02 23:12:48,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:12:48,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867225772] [2021-11-02 23:12:48,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:12:48,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:12:48,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:49,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:12:49,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:12:49,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867225772] [2021-11-02 23:12:49,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867225772] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:12:49,100 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:12:49,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:12:49,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537016367] [2021-11-02 23:12:49,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:12:49,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:12:49,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:12:49,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:12:49,145 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:49,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:12:49,179 INFO L93 Difference]: Finished difference Result 38 states and 54 transitions. [2021-11-02 23:12:49,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:12:49,182 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-02 23:12:49,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:12:49,198 INFO L225 Difference]: With dead ends: 38 [2021-11-02 23:12:49,198 INFO L226 Difference]: Without dead ends: 18 [2021-11-02 23:12:49,202 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:12:49,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-02 23:12:49,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-11-02 23:12:49,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 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) [2021-11-02 23:12:49,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2021-11-02 23:12:49,237 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 10 [2021-11-02 23:12:49,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:12:49,238 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2021-11-02 23:12:49,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:49,239 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2021-11-02 23:12:49,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-02 23:12:49,240 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:12:49,241 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:12:49,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 23:12:49,241 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:12:49,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:12:49,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1264138591, now seen corresponding path program 1 times [2021-11-02 23:12:49,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:12:49,247 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226190511] [2021-11-02 23:12:49,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:12:49,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:12:49,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:49,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 23:12:49,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:12:49,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226190511] [2021-11-02 23:12:49,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226190511] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:12:49,330 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:12:49,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:12:49,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226734047] [2021-11-02 23:12:49,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:12:49,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:12:49,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:12:49,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:12:49,337 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2021-11-02 23:12:49,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:12:49,372 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2021-11-02 23:12:49,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:12:49,373 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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 12 [2021-11-02 23:12:49,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:12:49,376 INFO L225 Difference]: With dead ends: 35 [2021-11-02 23:12:49,376 INFO L226 Difference]: Without dead ends: 27 [2021-11-02 23:12:49,378 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:12:49,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-02 23:12:49,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 18. [2021-11-02 23:12:49,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:49,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2021-11-02 23:12:49,386 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 12 [2021-11-02 23:12:49,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:12:49,387 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2021-11-02 23:12:49,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2021-11-02 23:12:49,388 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2021-11-02 23:12:49,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-02 23:12:49,390 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:12:49,390 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:12:49,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 23:12:49,391 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:12:49,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:12:49,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1458340319, now seen corresponding path program 1 times [2021-11-02 23:12:49,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:12:49,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007131736] [2021-11-02 23:12:49,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:12:49,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:12:49,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:49,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 23:12:49,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:12:49,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007131736] [2021-11-02 23:12:49,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007131736] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:12:49,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388218519] [2021-11-02 23:12:49,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:12:49,493 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:12:49,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:12:49,495 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:12:49,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 23:12:49,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:49,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-02 23:12:49,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:12:49,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 23:12:49,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388218519] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:12:49,650 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:12:49,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-02 23:12:49,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933242172] [2021-11-02 23:12:49,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:12:49,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:12:49,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:12:49,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:12:49,654 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2021-11-02 23:12:49,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:12:49,673 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2021-11-02 23:12:49,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:12:49,674 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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) Word has length 15 [2021-11-02 23:12:49,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:12:49,675 INFO L225 Difference]: With dead ends: 32 [2021-11-02 23:12:49,676 INFO L226 Difference]: Without dead ends: 18 [2021-11-02 23:12:49,676 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:12:49,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-02 23:12:49,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-11-02 23:12:49,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 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) [2021-11-02 23:12:49,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-11-02 23:12:49,684 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 15 [2021-11-02 23:12:49,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:12:49,685 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-11-02 23:12:49,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2021-11-02 23:12:49,685 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-11-02 23:12:49,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-02 23:12:49,686 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:12:49,687 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:12:49,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 23:12:49,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:12:49,902 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:12:49,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:12:49,903 INFO L85 PathProgramCache]: Analyzing trace with hash 2027280351, now seen corresponding path program 1 times [2021-11-02 23:12:49,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:12:49,904 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789476193] [2021-11-02 23:12:49,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:12:49,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:12:49,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:49,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 23:12:49,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:12:49,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789476193] [2021-11-02 23:12:49,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789476193] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:12:49,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252712759] [2021-11-02 23:12:49,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:12:49,963 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:12:49,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:12:49,964 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:12:49,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 23:12:50,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:50,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 23:12:50,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:12:50,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 23:12:50,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252712759] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:12:50,183 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:12:50,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-11-02 23:12:50,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885401478] [2021-11-02 23:12:50,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 23:12:50,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:12:50,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 23:12:50,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-02 23:12:50,187 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:50,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:12:50,265 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2021-11-02 23:12:50,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 23:12:50,266 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-02 23:12:50,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:12:50,267 INFO L225 Difference]: With dead ends: 53 [2021-11-02 23:12:50,268 INFO L226 Difference]: Without dead ends: 40 [2021-11-02 23:12:50,269 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-02 23:12:50,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-02 23:12:50,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 23. [2021-11-02 23:12:50,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:50,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-11-02 23:12:50,278 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 15 [2021-11-02 23:12:50,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:12:50,278 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-11-02 23:12:50,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:50,279 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-11-02 23:12:50,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-02 23:12:50,280 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:12:50,280 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:12:50,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-02 23:12:50,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:12:50,498 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:12:50,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:12:50,499 INFO L85 PathProgramCache]: Analyzing trace with hash -2139127327, now seen corresponding path program 2 times [2021-11-02 23:12:50,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:12:50,499 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978707578] [2021-11-02 23:12:50,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:12:50,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:12:50,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:50,572 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-02 23:12:50,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:12:50,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978707578] [2021-11-02 23:12:50,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978707578] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:12:50,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105285503] [2021-11-02 23:12:50,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:12:50,606 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:12:50,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:12:50,628 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:12:50,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-02 23:12:50,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:12:50,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:12:50,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-02 23:12:50,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:12:50,862 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-02 23:12:50,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105285503] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:12:50,862 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:12:50,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-02 23:12:50,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423723539] [2021-11-02 23:12:50,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 23:12:50,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:12:50,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 23:12:50,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-02 23:12:50,865 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:50,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:12:50,886 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2021-11-02 23:12:50,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 23:12:50,887 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-02 23:12:50,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:12:50,888 INFO L225 Difference]: With dead ends: 42 [2021-11-02 23:12:50,888 INFO L226 Difference]: Without dead ends: 26 [2021-11-02 23:12:50,888 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-02 23:12:50,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-02 23:12:50,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-11-02 23:12:50,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:50,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-11-02 23:12:50,892 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 20 [2021-11-02 23:12:50,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:12:50,893 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-11-02 23:12:50,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:50,893 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-11-02 23:12:50,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-02 23:12:50,894 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:12:50,894 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:12:50,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-02 23:12:51,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:12:51,116 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:12:51,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:12:51,117 INFO L85 PathProgramCache]: Analyzing trace with hash -331071005, now seen corresponding path program 3 times [2021-11-02 23:12:51,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:12:51,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427785776] [2021-11-02 23:12:51,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:12:51,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:12:51,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:51,193 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-02 23:12:51,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:12:51,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427785776] [2021-11-02 23:12:51,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427785776] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:12:51,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337671902] [2021-11-02 23:12:51,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:12:51,194 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:12:51,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:12:51,195 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:12:51,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-02 23:12:51,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-02 23:12:51,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:12:51,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 23:12:51,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:12:51,360 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-02 23:12:51,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337671902] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:12:51,361 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:12:51,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-11-02 23:12:51,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089192480] [2021-11-02 23:12:51,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 23:12:51,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:12:51,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 23:12:51,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-02 23:12:51,365 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:51,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:12:51,432 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2021-11-02 23:12:51,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 23:12:51,433 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-02 23:12:51,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:12:51,434 INFO L225 Difference]: With dead ends: 70 [2021-11-02 23:12:51,434 INFO L226 Difference]: Without dead ends: 54 [2021-11-02 23:12:51,435 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-02 23:12:51,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-02 23:12:51,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 30. [2021-11-02 23:12:51,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:51,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-11-02 23:12:51,450 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 22 [2021-11-02 23:12:51,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:12:51,451 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-11-02 23:12:51,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:51,453 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-11-02 23:12:51,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-02 23:12:51,454 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:12:51,455 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:12:51,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-02 23:12:51,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:12:51,670 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:12:51,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:12:51,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1534672359, now seen corresponding path program 4 times [2021-11-02 23:12:51,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:12:51,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576045405] [2021-11-02 23:12:51,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:12:51,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:12:51,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:51,772 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-02 23:12:51,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:12:51,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576045405] [2021-11-02 23:12:51,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576045405] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:12:51,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917013852] [2021-11-02 23:12:51,773 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:12:51,773 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:12:51,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:12:51,774 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:12:51,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-02 23:12:51,879 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:12:51,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:12:51,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 23:12:51,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:12:52,004 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-02 23:12:52,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917013852] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:12:52,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:12:52,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-11-02 23:12:52,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835348426] [2021-11-02 23:12:52,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 23:12:52,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:12:52,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 23:12:52,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-02 23:12:52,010 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:52,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:12:52,094 INFO L93 Difference]: Finished difference Result 85 states and 96 transitions. [2021-11-02 23:12:52,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 23:12:52,095 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-02 23:12:52,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:12:52,100 INFO L225 Difference]: With dead ends: 85 [2021-11-02 23:12:52,101 INFO L226 Difference]: Without dead ends: 66 [2021-11-02 23:12:52,102 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-02 23:12:52,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-02 23:12:52,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 35. [2021-11-02 23:12:52,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 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) [2021-11-02 23:12:52,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2021-11-02 23:12:52,118 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 27 [2021-11-02 23:12:52,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:12:52,119 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2021-11-02 23:12:52,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:52,119 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2021-11-02 23:12:52,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-02 23:12:52,120 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:12:52,120 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:12:52,146 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-02 23:12:52,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:12:52,334 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:12:52,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:12:52,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1766720103, now seen corresponding path program 5 times [2021-11-02 23:12:52,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:12:52,335 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787848378] [2021-11-02 23:12:52,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:12:52,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:12:52,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:52,457 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-02 23:12:52,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:12:52,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787848378] [2021-11-02 23:12:52,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787848378] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:12:52,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918999001] [2021-11-02 23:12:52,458 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:12:52,458 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:12:52,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:12:52,459 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:12:52,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-02 23:12:52,558 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-02 23:12:52,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:12:52,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-02 23:12:52,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:12:52,722 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-02 23:12:52,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918999001] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:12:52,726 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:12:52,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-11-02 23:12:52,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770936245] [2021-11-02 23:12:52,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-02 23:12:52,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:12:52,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-02 23:12:52,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-11-02 23:12:52,730 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 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) [2021-11-02 23:12:52,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:12:52,827 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2021-11-02 23:12:52,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-02 23:12:52,830 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 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 32 [2021-11-02 23:12:52,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:12:52,830 INFO L225 Difference]: With dead ends: 100 [2021-11-02 23:12:52,830 INFO L226 Difference]: Without dead ends: 78 [2021-11-02 23:12:52,831 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-11-02 23:12:52,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-02 23:12:52,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 40. [2021-11-02 23:12:52,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 39 states have internal predecessors, (43), 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) [2021-11-02 23:12:52,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2021-11-02 23:12:52,835 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 32 [2021-11-02 23:12:52,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:12:52,837 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2021-11-02 23:12:52,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 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) [2021-11-02 23:12:52,837 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2021-11-02 23:12:52,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-02 23:12:52,838 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:12:52,838 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:12:52,860 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-02 23:12:53,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:12:53,060 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:12:53,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:12:53,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1089794667, now seen corresponding path program 6 times [2021-11-02 23:12:53,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:12:53,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173118185] [2021-11-02 23:12:53,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:12:53,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:12:53,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:53,177 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-02 23:12:53,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:12:53,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173118185] [2021-11-02 23:12:53,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173118185] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:12:53,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295876557] [2021-11-02 23:12:53,177 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:12:53,178 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:12:53,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:12:53,186 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:12:53,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-02 23:12:53,301 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-02 23:12:53,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:12:53,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-02 23:12:53,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:12:53,606 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-02 23:12:53,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295876557] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:12:53,607 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:12:53,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-11-02 23:12:53,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183313985] [2021-11-02 23:12:53,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-02 23:12:53,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:12:53,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-02 23:12:53,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-11-02 23:12:53,609 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:53,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:12:53,819 INFO L93 Difference]: Finished difference Result 77 states and 86 transitions. [2021-11-02 23:12:53,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-02 23:12:53,819 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-02 23:12:53,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:12:53,820 INFO L225 Difference]: With dead ends: 77 [2021-11-02 23:12:53,820 INFO L226 Difference]: Without dead ends: 52 [2021-11-02 23:12:53,820 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2021-11-02 23:12:53,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-02 23:12:53,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 45. [2021-11-02 23:12:53,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 44 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:53,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2021-11-02 23:12:53,825 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 37 [2021-11-02 23:12:53,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:12:53,826 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2021-11-02 23:12:53,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:53,826 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2021-11-02 23:12:53,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-02 23:12:53,827 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:12:53,828 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:12:53,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-02 23:12:54,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-02 23:12:54,038 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:12:54,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:12:54,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1351978204, now seen corresponding path program 1 times [2021-11-02 23:12:54,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:12:54,039 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848501563] [2021-11-02 23:12:54,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:12:54,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:12:54,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:54,108 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-02 23:12:54,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:12:54,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848501563] [2021-11-02 23:12:54,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848501563] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:12:54,108 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:12:54,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:12:54,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092621367] [2021-11-02 23:12:54,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:12:54,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:12:54,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:12:54,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:12:54,126 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:54,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:12:54,131 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2021-11-02 23:12:54,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:12:54,132 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-02 23:12:54,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:12:54,136 INFO L225 Difference]: With dead ends: 52 [2021-11-02 23:12:54,137 INFO L226 Difference]: Without dead ends: 45 [2021-11-02 23:12:54,137 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:12:54,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-02 23:12:54,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-11-02 23:12:54,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 44 states have internal predecessors, (47), 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) [2021-11-02 23:12:54,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2021-11-02 23:12:54,145 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 42 [2021-11-02 23:12:54,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:12:54,146 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2021-11-02 23:12:54,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:54,146 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2021-11-02 23:12:54,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-02 23:12:54,148 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:12:54,148 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:12:54,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-02 23:12:54,149 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:12:54,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:12:54,149 INFO L85 PathProgramCache]: Analyzing trace with hash 2040020590, now seen corresponding path program 1 times [2021-11-02 23:12:54,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:12:54,150 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679827846] [2021-11-02 23:12:54,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:12:54,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:12:54,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:54,303 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-02 23:12:54,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:12:54,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679827846] [2021-11-02 23:12:54,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679827846] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:12:54,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321457625] [2021-11-02 23:12:54,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:12:54,304 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:12:54,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:12:54,305 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:12:54,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-02 23:12:54,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:54,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-02 23:12:54,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:12:54,742 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-02 23:12:54,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321457625] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:12:54,742 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:12:54,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-11-02 23:12:54,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862619575] [2021-11-02 23:12:54,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-02 23:12:54,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:12:54,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-02 23:12:54,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2021-11-02 23:12:54,748 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:54,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:12:54,793 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2021-11-02 23:12:54,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 23:12:54,793 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-02 23:12:54,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:12:54,794 INFO L225 Difference]: With dead ends: 76 [2021-11-02 23:12:54,794 INFO L226 Difference]: Without dead ends: 48 [2021-11-02 23:12:54,795 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2021-11-02 23:12:54,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-02 23:12:54,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2021-11-02 23:12:54,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.065217391304348) internal successors, (49), 46 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:54,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2021-11-02 23:12:54,807 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 44 [2021-11-02 23:12:54,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:12:54,807 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2021-11-02 23:12:54,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:54,808 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2021-11-02 23:12:54,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-02 23:12:54,808 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:12:54,809 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:12:54,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-02 23:12:55,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:12:55,029 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:12:55,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:12:55,030 INFO L85 PathProgramCache]: Analyzing trace with hash 461215856, now seen corresponding path program 2 times [2021-11-02 23:12:55,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:12:55,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989464681] [2021-11-02 23:12:55,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:12:55,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:12:55,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:55,171 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-02 23:12:55,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:12:55,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989464681] [2021-11-02 23:12:55,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989464681] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:12:55,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631902325] [2021-11-02 23:12:55,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:12:55,172 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:12:55,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:12:55,173 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:12:55,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-02 23:12:55,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:12:55,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:12:55,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-02 23:12:55,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:12:55,666 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-02 23:12:55,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631902325] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:12:55,668 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:12:55,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-11-02 23:12:55,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328254718] [2021-11-02 23:12:55,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-02 23:12:55,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:12:55,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-02 23:12:55,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2021-11-02 23:12:55,670 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:55,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:12:55,714 INFO L93 Difference]: Finished difference Result 78 states and 82 transitions. [2021-11-02 23:12:55,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 23:12:55,714 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-02 23:12:55,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:12:55,715 INFO L225 Difference]: With dead ends: 78 [2021-11-02 23:12:55,715 INFO L226 Difference]: Without dead ends: 50 [2021-11-02 23:12:55,716 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2021-11-02 23:12:55,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-02 23:12:55,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2021-11-02 23:12:55,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0625) internal successors, (51), 48 states have internal predecessors, (51), 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) [2021-11-02 23:12:55,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2021-11-02 23:12:55,721 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 46 [2021-11-02 23:12:55,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:12:55,722 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2021-11-02 23:12:55,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:55,722 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2021-11-02 23:12:55,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-02 23:12:55,723 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:12:55,723 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:12:55,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-02 23:12:55,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-02 23:12:55,942 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:12:55,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:12:55,943 INFO L85 PathProgramCache]: Analyzing trace with hash -646678030, now seen corresponding path program 3 times [2021-11-02 23:12:55,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:12:55,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556576748] [2021-11-02 23:12:55,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:12:55,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:12:55,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:56,102 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-02 23:12:56,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:12:56,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556576748] [2021-11-02 23:12:56,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556576748] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:12:56,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507410773] [2021-11-02 23:12:56,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:12:56,103 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:12:56,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:12:56,106 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:12:56,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-02 23:12:56,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-02 23:12:56,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:12:56,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-02 23:12:56,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:12:56,477 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-02 23:12:56,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507410773] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:12:56,477 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:12:56,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 18 [2021-11-02 23:12:56,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788061137] [2021-11-02 23:12:56,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-02 23:12:56,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:12:56,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-02 23:12:56,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-11-02 23:12:56,480 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 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) [2021-11-02 23:12:56,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:12:56,576 INFO L93 Difference]: Finished difference Result 122 states and 127 transitions. [2021-11-02 23:12:56,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-02 23:12:56,577 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 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 48 [2021-11-02 23:12:56,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:12:56,578 INFO L225 Difference]: With dead ends: 122 [2021-11-02 23:12:56,578 INFO L226 Difference]: Without dead ends: 94 [2021-11-02 23:12:56,579 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-11-02 23:12:56,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-02 23:12:56,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 54. [2021-11-02 23:12:56,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 53 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:56,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2021-11-02 23:12:56,587 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 48 [2021-11-02 23:12:56,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:12:56,588 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2021-11-02 23:12:56,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 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) [2021-11-02 23:12:56,588 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2021-11-02 23:12:56,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-02 23:12:56,589 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:12:56,589 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:12:56,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-02 23:12:56,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:12:56,802 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:12:56,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:12:56,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1330435568, now seen corresponding path program 4 times [2021-11-02 23:12:56,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:12:56,803 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764468729] [2021-11-02 23:12:56,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:12:56,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:12:56,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:56,989 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-02 23:12:56,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:12:56,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764468729] [2021-11-02 23:12:56,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764468729] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:12:56,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961823531] [2021-11-02 23:12:56,990 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:12:56,990 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:12:56,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:12:56,991 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:12:57,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-02 23:12:57,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:12:57,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:12:57,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-02 23:12:57,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:12:57,384 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-11-02 23:12:57,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961823531] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:12:57,385 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:12:57,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2021-11-02 23:12:57,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19589092] [2021-11-02 23:12:57,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-02 23:12:57,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:12:57,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-02 23:12:57,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2021-11-02 23:12:57,386 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 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) [2021-11-02 23:12:57,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:12:57,502 INFO L93 Difference]: Finished difference Result 137 states and 142 transitions. [2021-11-02 23:12:57,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-02 23:12:57,502 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-02 23:12:57,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:12:57,503 INFO L225 Difference]: With dead ends: 137 [2021-11-02 23:12:57,503 INFO L226 Difference]: Without dead ends: 106 [2021-11-02 23:12:57,504 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2021-11-02 23:12:57,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-11-02 23:12:57,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 59. [2021-11-02 23:12:57,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 58 states have internal predecessors, (61), 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) [2021-11-02 23:12:57,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2021-11-02 23:12:57,510 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 53 [2021-11-02 23:12:57,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:12:57,510 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2021-11-02 23:12:57,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 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) [2021-11-02 23:12:57,510 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2021-11-02 23:12:57,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-02 23:12:57,511 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:12:57,511 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 7, 7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:12:57,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-02 23:12:57,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:12:57,726 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:12:57,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:12:57,727 INFO L85 PathProgramCache]: Analyzing trace with hash 2088027254, now seen corresponding path program 5 times [2021-11-02 23:12:57,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:12:57,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571753944] [2021-11-02 23:12:57,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:12:57,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:12:57,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:57,933 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-02 23:12:57,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:12:57,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571753944] [2021-11-02 23:12:57,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571753944] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:12:57,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866980138] [2021-11-02 23:12:57,934 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:12:57,934 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:12:57,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:12:57,935 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:12:57,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-02 23:12:58,227 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-11-02 23:12:58,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:12:58,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-02 23:12:58,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:12:58,466 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-11-02 23:12:58,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866980138] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:12:58,466 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:12:58,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-11-02 23:12:58,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331287363] [2021-11-02 23:12:58,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-02 23:12:58,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:12:58,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-02 23:12:58,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=327, Unknown=0, NotChecked=0, Total=462 [2021-11-02 23:12:58,468 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 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) [2021-11-02 23:12:58,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:12:58,590 INFO L93 Difference]: Finished difference Result 152 states and 157 transitions. [2021-11-02 23:12:58,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-02 23:12:58,591 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 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 58 [2021-11-02 23:12:58,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:12:58,592 INFO L225 Difference]: With dead ends: 152 [2021-11-02 23:12:58,592 INFO L226 Difference]: Without dead ends: 118 [2021-11-02 23:12:58,593 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=327, Unknown=0, NotChecked=0, Total=462 [2021-11-02 23:12:58,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-11-02 23:12:58,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 64. [2021-11-02 23:12:58,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 63 states have internal predecessors, (66), 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) [2021-11-02 23:12:58,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2021-11-02 23:12:58,598 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 58 [2021-11-02 23:12:58,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:12:58,599 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2021-11-02 23:12:58,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 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) [2021-11-02 23:12:58,599 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2021-11-02 23:12:58,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-02 23:12:58,600 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:12:58,600 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:12:58,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-02 23:12:58,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-02 23:12:58,812 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:12:58,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:12:58,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1964209268, now seen corresponding path program 6 times [2021-11-02 23:12:58,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:12:58,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533520844] [2021-11-02 23:12:58,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:12:58,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:12:58,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:59,036 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-11-02 23:12:59,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:12:59,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533520844] [2021-11-02 23:12:59,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533520844] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:12:59,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452217859] [2021-11-02 23:12:59,036 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:12:59,037 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:12:59,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:12:59,039 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:12:59,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-02 23:12:59,344 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-11-02 23:12:59,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:12:59,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-02 23:12:59,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:12:59,674 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2021-11-02 23:12:59,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452217859] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:12:59,674 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:12:59,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 22 [2021-11-02 23:12:59,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343134918] [2021-11-02 23:12:59,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-02 23:12:59,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:12:59,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-02 23:12:59,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2021-11-02 23:12:59,678 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 states have internal predecessors, (63), 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) [2021-11-02 23:12:59,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:12:59,869 INFO L93 Difference]: Finished difference Result 113 states and 118 transitions. [2021-11-02 23:12:59,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-02 23:12:59,870 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 states have internal predecessors, (63), 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 63 [2021-11-02 23:12:59,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:12:59,871 INFO L225 Difference]: With dead ends: 113 [2021-11-02 23:12:59,871 INFO L226 Difference]: Without dead ends: 76 [2021-11-02 23:12:59,872 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2021-11-02 23:12:59,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-02 23:12:59,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 71. [2021-11-02 23:12:59,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.042857142857143) internal successors, (73), 70 states have internal predecessors, (73), 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) [2021-11-02 23:12:59,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2021-11-02 23:12:59,877 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 63 [2021-11-02 23:12:59,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:12:59,877 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2021-11-02 23:12:59,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 states have internal predecessors, (63), 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) [2021-11-02 23:12:59,878 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2021-11-02 23:12:59,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-02 23:12:59,878 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:12:59,879 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 8, 8, 8, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:12:59,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-02 23:13:00,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-02 23:13:00,079 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:13:00,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:00,080 INFO L85 PathProgramCache]: Analyzing trace with hash 601482327, now seen corresponding path program 7 times [2021-11-02 23:13:00,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:00,080 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710786856] [2021-11-02 23:13:00,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:00,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:00,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:00,328 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-11-02 23:13:00,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:00,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710786856] [2021-11-02 23:13:00,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710786856] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:00,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401540142] [2021-11-02 23:13:00,329 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:13:00,329 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:00,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:00,330 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:00,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-02 23:13:00,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:00,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-02 23:13:00,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:01,135 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-11-02 23:13:01,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401540142] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:01,135 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:13:01,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-11-02 23:13:01,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629876425] [2021-11-02 23:13:01,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-02 23:13:01,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:01,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-02 23:13:01,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=526, Unknown=0, NotChecked=0, Total=870 [2021-11-02 23:13:01,138 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 30 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) [2021-11-02 23:13:01,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:01,193 INFO L93 Difference]: Finished difference Result 116 states and 120 transitions. [2021-11-02 23:13:01,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-02 23:13:01,194 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 30 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 70 [2021-11-02 23:13:01,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:01,195 INFO L225 Difference]: With dead ends: 116 [2021-11-02 23:13:01,195 INFO L226 Difference]: Without dead ends: 74 [2021-11-02 23:13:01,197 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=344, Invalid=526, Unknown=0, NotChecked=0, Total=870 [2021-11-02 23:13:01,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-02 23:13:01,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2021-11-02 23:13:01,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 72 states have internal predecessors, (75), 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) [2021-11-02 23:13:01,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2021-11-02 23:13:01,202 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 70 [2021-11-02 23:13:01,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:01,204 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2021-11-02 23:13:01,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 30 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) [2021-11-02 23:13:01,204 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2021-11-02 23:13:01,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-02 23:13:01,205 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:01,205 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 8, 8, 8, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:01,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-02 23:13:01,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-02 23:13:01,406 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:13:01,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:01,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1946476505, now seen corresponding path program 8 times [2021-11-02 23:13:01,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:01,406 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614190488] [2021-11-02 23:13:01,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:01,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:01,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:01,680 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-11-02 23:13:01,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:01,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614190488] [2021-11-02 23:13:01,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614190488] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:01,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145372353] [2021-11-02 23:13:01,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:13:01,681 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:01,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:01,682 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:01,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-02 23:13:01,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:13:01,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:13:01,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-02 23:13:01,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:02,541 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-11-02 23:13:02,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145372353] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:02,541 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:13:02,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-11-02 23:13:02,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143879443] [2021-11-02 23:13:02,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-02 23:13:02,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:02,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-02 23:13:02,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=601, Unknown=0, NotChecked=0, Total=992 [2021-11-02 23:13:02,544 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand has 32 states, 32 states have (on average 2.3125) internal successors, (74), 32 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:02,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:02,604 INFO L93 Difference]: Finished difference Result 118 states and 122 transitions. [2021-11-02 23:13:02,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-02 23:13:02,605 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 32 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-02 23:13:02,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:02,606 INFO L225 Difference]: With dead ends: 118 [2021-11-02 23:13:02,606 INFO L226 Difference]: Without dead ends: 76 [2021-11-02 23:13:02,606 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=391, Invalid=601, Unknown=0, NotChecked=0, Total=992 [2021-11-02 23:13:02,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-02 23:13:02,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2021-11-02 23:13:02,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 74 states have internal predecessors, (77), 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) [2021-11-02 23:13:02,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2021-11-02 23:13:02,612 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 72 [2021-11-02 23:13:02,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:02,612 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2021-11-02 23:13:02,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 32 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:02,613 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2021-11-02 23:13:02,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-02 23:13:02,613 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:02,613 INFO L513 BasicCegarLoop]: trace histogram [15, 15, 8, 8, 8, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:02,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-02 23:13:02,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-02 23:13:02,814 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:13:02,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:02,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1700725467, now seen corresponding path program 9 times [2021-11-02 23:13:02,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:02,815 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907642917] [2021-11-02 23:13:02,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:02,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:02,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:03,097 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-11-02 23:13:03,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:03,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907642917] [2021-11-02 23:13:03,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907642917] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:03,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533443525] [2021-11-02 23:13:03,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:13:03,098 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:03,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:03,099 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:03,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-02 23:13:03,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-02 23:13:03,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:13:03,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-02 23:13:03,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:03,719 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2021-11-02 23:13:03,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533443525] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:03,719 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:13:03,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11] total 27 [2021-11-02 23:13:03,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682744659] [2021-11-02 23:13:03,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-02 23:13:03,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:03,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-02 23:13:03,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2021-11-02 23:13:03,721 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 27 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:03,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:03,868 INFO L93 Difference]: Finished difference Result 176 states and 181 transitions. [2021-11-02 23:13:03,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-02 23:13:03,868 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 27 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-02 23:13:03,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:03,869 INFO L225 Difference]: With dead ends: 176 [2021-11-02 23:13:03,870 INFO L226 Difference]: Without dead ends: 134 [2021-11-02 23:13:03,870 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2021-11-02 23:13:03,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-11-02 23:13:03,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 80. [2021-11-02 23:13:03,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.0379746835443038) internal successors, (82), 79 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:03,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2021-11-02 23:13:03,877 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 74 [2021-11-02 23:13:03,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:03,877 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2021-11-02 23:13:03,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 27 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:03,878 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2021-11-02 23:13:03,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-02 23:13:03,879 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:03,879 INFO L513 BasicCegarLoop]: trace histogram [16, 16, 9, 9, 9, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:03,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-02 23:13:04,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:04,080 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:13:04,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:04,080 INFO L85 PathProgramCache]: Analyzing trace with hash 605502177, now seen corresponding path program 10 times [2021-11-02 23:13:04,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:04,080 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029688245] [2021-11-02 23:13:04,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:04,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:04,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:04,335 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-11-02 23:13:04,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:04,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029688245] [2021-11-02 23:13:04,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029688245] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:04,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596629371] [2021-11-02 23:13:04,336 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:13:04,336 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:04,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:04,340 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:04,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-02 23:13:04,635 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:13:04,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:13:04,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-02 23:13:04,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:04,975 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2021-11-02 23:13:04,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596629371] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:04,975 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:13:04,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12] total 29 [2021-11-02 23:13:04,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758983094] [2021-11-02 23:13:04,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-02 23:13:04,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:04,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-02 23:13:04,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=576, Unknown=0, NotChecked=0, Total=812 [2021-11-02 23:13:04,978 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand has 29 states, 29 states have (on average 2.793103448275862) internal successors, (81), 29 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:05,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:05,139 INFO L93 Difference]: Finished difference Result 191 states and 196 transitions. [2021-11-02 23:13:05,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-02 23:13:05,140 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.793103448275862) internal successors, (81), 29 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-02 23:13:05,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:05,141 INFO L225 Difference]: With dead ends: 191 [2021-11-02 23:13:05,141 INFO L226 Difference]: Without dead ends: 146 [2021-11-02 23:13:05,141 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=236, Invalid=576, Unknown=0, NotChecked=0, Total=812 [2021-11-02 23:13:05,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-11-02 23:13:05,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 85. [2021-11-02 23:13:05,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0357142857142858) internal successors, (87), 84 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:05,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2021-11-02 23:13:05,147 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 79 [2021-11-02 23:13:05,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:05,147 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2021-11-02 23:13:05,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.793103448275862) internal successors, (81), 29 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:05,148 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2021-11-02 23:13:05,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-02 23:13:05,149 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:05,149 INFO L513 BasicCegarLoop]: trace histogram [17, 17, 10, 10, 10, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:05,189 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-11-02 23:13:05,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:05,366 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:13:05,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:05,367 INFO L85 PathProgramCache]: Analyzing trace with hash -956491937, now seen corresponding path program 11 times [2021-11-02 23:13:05,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:05,367 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364269650] [2021-11-02 23:13:05,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:05,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:05,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:05,653 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2021-11-02 23:13:05,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:05,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364269650] [2021-11-02 23:13:05,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364269650] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:05,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105990527] [2021-11-02 23:13:05,653 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:13:05,653 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:05,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:05,655 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:05,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-02 23:13:06,088 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-11-02 23:13:06,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:13:06,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-02 23:13:06,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:06,459 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2021-11-02 23:13:06,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105990527] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:06,459 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:13:06,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13] total 31 [2021-11-02 23:13:06,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495707893] [2021-11-02 23:13:06,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-02 23:13:06,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:06,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-02 23:13:06,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=663, Unknown=0, NotChecked=0, Total=930 [2021-11-02 23:13:06,462 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand has 31 states, 31 states have (on average 2.774193548387097) internal successors, (86), 31 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:06,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:06,627 INFO L93 Difference]: Finished difference Result 206 states and 211 transitions. [2021-11-02 23:13:06,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-02 23:13:06,628 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.774193548387097) internal successors, (86), 31 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-02 23:13:06,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:06,629 INFO L225 Difference]: With dead ends: 206 [2021-11-02 23:13:06,629 INFO L226 Difference]: Without dead ends: 158 [2021-11-02 23:13:06,630 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=267, Invalid=663, Unknown=0, NotChecked=0, Total=930 [2021-11-02 23:13:06,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-11-02 23:13:06,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 90. [2021-11-02 23:13:06,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.0337078651685394) internal successors, (92), 89 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:06,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2021-11-02 23:13:06,636 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 84 [2021-11-02 23:13:06,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:06,636 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2021-11-02 23:13:06,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.774193548387097) internal successors, (86), 31 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:06,637 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2021-11-02 23:13:06,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-02 23:13:06,638 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:06,638 INFO L513 BasicCegarLoop]: trace histogram [18, 18, 11, 11, 11, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:06,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-02 23:13:06,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-02 23:13:06,862 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:13:06,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:06,863 INFO L85 PathProgramCache]: Analyzing trace with hash 251556445, now seen corresponding path program 12 times [2021-11-02 23:13:06,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:06,863 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112925442] [2021-11-02 23:13:06,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:06,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:06,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:07,167 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-11-02 23:13:07,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:07,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112925442] [2021-11-02 23:13:07,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112925442] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:07,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355737653] [2021-11-02 23:13:07,168 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:13:07,168 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:07,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:07,170 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:07,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-02 23:13:07,947 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-11-02 23:13:07,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:13:07,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-02 23:13:07,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:08,383 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2021-11-02 23:13:08,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355737653] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:08,384 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:13:08,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11] total 30 [2021-11-02 23:13:08,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171767175] [2021-11-02 23:13:08,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-02 23:13:08,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:08,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-02 23:13:08,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=636, Unknown=0, NotChecked=0, Total=870 [2021-11-02 23:13:08,387 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 30 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:08,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:08,602 INFO L93 Difference]: Finished difference Result 153 states and 158 transitions. [2021-11-02 23:13:08,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-02 23:13:08,605 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 30 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-11-02 23:13:08,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:08,606 INFO L225 Difference]: With dead ends: 153 [2021-11-02 23:13:08,606 INFO L226 Difference]: Without dead ends: 102 [2021-11-02 23:13:08,606 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=249, Invalid=807, Unknown=0, NotChecked=0, Total=1056 [2021-11-02 23:13:08,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-11-02 23:13:08,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 97. [2021-11-02 23:13:08,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.03125) internal successors, (99), 96 states have internal predecessors, (99), 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) [2021-11-02 23:13:08,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2021-11-02 23:13:08,612 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 89 [2021-11-02 23:13:08,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:08,612 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2021-11-02 23:13:08,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 30 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:08,613 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2021-11-02 23:13:08,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-02 23:13:08,613 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:08,614 INFO L513 BasicCegarLoop]: trace histogram [19, 19, 11, 11, 11, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:08,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-02 23:13:08,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:08,826 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:13:08,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:08,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1233500582, now seen corresponding path program 13 times [2021-11-02 23:13:08,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:08,827 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022834850] [2021-11-02 23:13:08,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:08,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:08,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:09,160 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2021-11-02 23:13:09,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:09,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022834850] [2021-11-02 23:13:09,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022834850] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:09,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321316237] [2021-11-02 23:13:09,161 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:13:09,162 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:09,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:09,173 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:09,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-02 23:13:09,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:09,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-02 23:13:09,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:10,469 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2021-11-02 23:13:10,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321316237] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:10,469 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:13:10,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-11-02 23:13:10,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855532059] [2021-11-02 23:13:10,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-02 23:13:10,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:10,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-02 23:13:10,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=1051, Unknown=0, NotChecked=0, Total=1722 [2021-11-02 23:13:10,472 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand has 42 states, 42 states have (on average 2.238095238095238) internal successors, (94), 42 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:10,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:10,557 INFO L93 Difference]: Finished difference Result 156 states and 160 transitions. [2021-11-02 23:13:10,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-02 23:13:10,558 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.238095238095238) internal successors, (94), 42 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-11-02 23:13:10,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:10,559 INFO L225 Difference]: With dead ends: 156 [2021-11-02 23:13:10,559 INFO L226 Difference]: Without dead ends: 100 [2021-11-02 23:13:10,560 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=671, Invalid=1051, Unknown=0, NotChecked=0, Total=1722 [2021-11-02 23:13:10,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-11-02 23:13:10,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2021-11-02 23:13:10,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.030612244897959) internal successors, (101), 98 states have internal predecessors, (101), 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) [2021-11-02 23:13:10,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 101 transitions. [2021-11-02 23:13:10,566 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 101 transitions. Word has length 96 [2021-11-02 23:13:10,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:10,566 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 101 transitions. [2021-11-02 23:13:10,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.238095238095238) internal successors, (94), 42 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:10,567 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 101 transitions. [2021-11-02 23:13:10,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-02 23:13:10,568 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:10,568 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 11, 11, 11, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:10,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-02 23:13:10,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:10,782 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:13:10,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:10,783 INFO L85 PathProgramCache]: Analyzing trace with hash -272140632, now seen corresponding path program 14 times [2021-11-02 23:13:10,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:10,783 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101771029] [2021-11-02 23:13:10,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:10,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:10,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:11,155 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2021-11-02 23:13:11,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:11,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101771029] [2021-11-02 23:13:11,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101771029] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:11,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937311250] [2021-11-02 23:13:11,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:13:11,155 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:11,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:11,156 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:11,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-02 23:13:11,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:13:11,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:13:11,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-02 23:13:11,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:12,671 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2021-11-02 23:13:12,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937311250] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:12,672 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:13:12,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 44 [2021-11-02 23:13:12,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832304575] [2021-11-02 23:13:12,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-02 23:13:12,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:12,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-02 23:13:12,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=736, Invalid=1156, Unknown=0, NotChecked=0, Total=1892 [2021-11-02 23:13:12,674 INFO L87 Difference]: Start difference. First operand 99 states and 101 transitions. Second operand has 44 states, 44 states have (on average 2.227272727272727) internal successors, (98), 44 states have internal predecessors, (98), 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) [2021-11-02 23:13:12,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:12,745 INFO L93 Difference]: Finished difference Result 158 states and 162 transitions. [2021-11-02 23:13:12,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-02 23:13:12,754 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.227272727272727) internal successors, (98), 44 states have internal predecessors, (98), 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 98 [2021-11-02 23:13:12,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:12,756 INFO L225 Difference]: With dead ends: 158 [2021-11-02 23:13:12,756 INFO L226 Difference]: Without dead ends: 102 [2021-11-02 23:13:12,757 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=736, Invalid=1156, Unknown=0, NotChecked=0, Total=1892 [2021-11-02 23:13:12,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-11-02 23:13:12,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2021-11-02 23:13:12,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.03) internal successors, (103), 100 states have internal predecessors, (103), 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) [2021-11-02 23:13:12,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2021-11-02 23:13:12,763 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 98 [2021-11-02 23:13:12,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:12,763 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2021-11-02 23:13:12,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.227272727272727) internal successors, (98), 44 states have internal predecessors, (98), 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) [2021-11-02 23:13:12,764 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2021-11-02 23:13:12,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-02 23:13:12,765 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:12,765 INFO L513 BasicCegarLoop]: trace histogram [21, 21, 11, 11, 11, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:12,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-02 23:13:12,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-02 23:13:12,992 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:13:12,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:12,992 INFO L85 PathProgramCache]: Analyzing trace with hash 210631466, now seen corresponding path program 15 times [2021-11-02 23:13:12,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:12,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670709150] [2021-11-02 23:13:12,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:12,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:13,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:13,384 INFO L134 CoverageAnalysis]: Checked inductivity of 641 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2021-11-02 23:13:13,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:13,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670709150] [2021-11-02 23:13:13,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670709150] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:13,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050412554] [2021-11-02 23:13:13,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:13:13,385 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:13,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:13,386 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:13,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-02 23:13:13,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-11-02 23:13:13,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:13:13,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-02 23:13:13,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:14,410 INFO L134 CoverageAnalysis]: Checked inductivity of 641 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2021-11-02 23:13:14,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050412554] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:14,411 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:13:14,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 14] total 36 [2021-11-02 23:13:14,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046351048] [2021-11-02 23:13:14,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-02 23:13:14,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:14,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-02 23:13:14,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=366, Invalid=894, Unknown=0, NotChecked=0, Total=1260 [2021-11-02 23:13:14,414 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand has 36 states, 36 states have (on average 2.6944444444444446) internal successors, (97), 36 states have internal predecessors, (97), 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) [2021-11-02 23:13:14,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:14,617 INFO L93 Difference]: Finished difference Result 230 states and 235 transitions. [2021-11-02 23:13:14,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-02 23:13:14,618 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.6944444444444446) internal successors, (97), 36 states have internal predecessors, (97), 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 100 [2021-11-02 23:13:14,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:14,619 INFO L225 Difference]: With dead ends: 230 [2021-11-02 23:13:14,619 INFO L226 Difference]: Without dead ends: 174 [2021-11-02 23:13:14,620 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=366, Invalid=894, Unknown=0, NotChecked=0, Total=1260 [2021-11-02 23:13:14,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-11-02 23:13:14,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 106. [2021-11-02 23:13:14,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.0285714285714285) internal successors, (108), 105 states have internal predecessors, (108), 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) [2021-11-02 23:13:14,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2021-11-02 23:13:14,631 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 100 [2021-11-02 23:13:14,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:14,632 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2021-11-02 23:13:14,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.6944444444444446) internal successors, (97), 36 states have internal predecessors, (97), 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) [2021-11-02 23:13:14,633 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2021-11-02 23:13:14,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-02 23:13:14,633 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:14,634 INFO L513 BasicCegarLoop]: trace histogram [22, 22, 12, 12, 12, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:14,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-02 23:13:14,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-02 23:13:14,842 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:13:14,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:14,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1180537624, now seen corresponding path program 16 times [2021-11-02 23:13:14,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:14,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890807049] [2021-11-02 23:13:14,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:14,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:14,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:15,287 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2021-11-02 23:13:15,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:15,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890807049] [2021-11-02 23:13:15,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890807049] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:15,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684399397] [2021-11-02 23:13:15,288 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:13:15,288 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:15,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:15,289 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:15,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-02 23:13:15,934 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:13:15,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:13:15,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-02 23:13:15,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:16,404 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2021-11-02 23:13:16,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684399397] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:16,404 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:13:16,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 15] total 38 [2021-11-02 23:13:16,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584067639] [2021-11-02 23:13:16,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-02 23:13:16,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:16,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-02 23:13:16,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=1002, Unknown=0, NotChecked=0, Total=1406 [2021-11-02 23:13:16,407 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand has 38 states, 38 states have (on average 2.6842105263157894) internal successors, (102), 38 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:16,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:16,567 INFO L93 Difference]: Finished difference Result 245 states and 250 transitions. [2021-11-02 23:13:16,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-02 23:13:16,568 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.6842105263157894) internal successors, (102), 38 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-11-02 23:13:16,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:16,569 INFO L225 Difference]: With dead ends: 245 [2021-11-02 23:13:16,569 INFO L226 Difference]: Without dead ends: 186 [2021-11-02 23:13:16,570 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=404, Invalid=1002, Unknown=0, NotChecked=0, Total=1406 [2021-11-02 23:13:16,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-11-02 23:13:16,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 111. [2021-11-02 23:13:16,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.0272727272727273) internal successors, (113), 110 states have internal predecessors, (113), 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) [2021-11-02 23:13:16,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2021-11-02 23:13:16,577 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 105 [2021-11-02 23:13:16,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:16,578 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2021-11-02 23:13:16,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.6842105263157894) internal successors, (102), 38 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:16,578 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2021-11-02 23:13:16,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-02 23:13:16,579 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:16,580 INFO L513 BasicCegarLoop]: trace histogram [23, 23, 13, 13, 13, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:16,615 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-11-02 23:13:16,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-02 23:13:16,794 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:13:16,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:16,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1538188882, now seen corresponding path program 17 times [2021-11-02 23:13:16,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:16,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144974921] [2021-11-02 23:13:16,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:16,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:16,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:17,225 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 271 trivial. 0 not checked. [2021-11-02 23:13:17,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:17,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144974921] [2021-11-02 23:13:17,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144974921] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:17,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445315483] [2021-11-02 23:13:17,226 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:13:17,226 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:17,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:17,227 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:17,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-02 23:13:18,514 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-11-02 23:13:18,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:13:18,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-02 23:13:18,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:19,058 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2021-11-02 23:13:19,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445315483] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:19,059 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:13:19,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 16] total 40 [2021-11-02 23:13:19,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411208114] [2021-11-02 23:13:19,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-02 23:13:19,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:19,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-02 23:13:19,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=1116, Unknown=0, NotChecked=0, Total=1560 [2021-11-02 23:13:19,062 INFO L87 Difference]: Start difference. First operand 111 states and 113 transitions. Second operand has 40 states, 40 states have (on average 2.675) internal successors, (107), 40 states have internal predecessors, (107), 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) [2021-11-02 23:13:19,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:19,270 INFO L93 Difference]: Finished difference Result 260 states and 265 transitions. [2021-11-02 23:13:19,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-02 23:13:19,271 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.675) internal successors, (107), 40 states have internal predecessors, (107), 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 110 [2021-11-02 23:13:19,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:19,272 INFO L225 Difference]: With dead ends: 260 [2021-11-02 23:13:19,272 INFO L226 Difference]: Without dead ends: 198 [2021-11-02 23:13:19,273 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=444, Invalid=1116, Unknown=0, NotChecked=0, Total=1560 [2021-11-02 23:13:19,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-11-02 23:13:19,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 116. [2021-11-02 23:13:19,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.0260869565217392) internal successors, (118), 115 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:19,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 118 transitions. [2021-11-02 23:13:19,281 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 118 transitions. Word has length 110 [2021-11-02 23:13:19,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:19,281 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 118 transitions. [2021-11-02 23:13:19,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.675) internal successors, (107), 40 states have internal predecessors, (107), 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) [2021-11-02 23:13:19,282 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 118 transitions. [2021-11-02 23:13:19,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-02 23:13:19,283 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:19,283 INFO L513 BasicCegarLoop]: trace histogram [24, 24, 14, 14, 14, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:19,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-02 23:13:19,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:19,506 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:13:19,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:19,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1240768364, now seen corresponding path program 18 times [2021-11-02 23:13:19,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:19,507 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324678949] [2021-11-02 23:13:19,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:19,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:19,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:20,004 INFO L134 CoverageAnalysis]: Checked inductivity of 887 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 311 trivial. 0 not checked. [2021-11-02 23:13:20,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:20,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324678949] [2021-11-02 23:13:20,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324678949] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:20,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901041419] [2021-11-02 23:13:20,005 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:13:20,005 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:20,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:20,006 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:20,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-02 23:13:21,708 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2021-11-02 23:13:21,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:13:21,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-02 23:13:21,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:22,256 INFO L134 CoverageAnalysis]: Checked inductivity of 887 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 731 trivial. 0 not checked. [2021-11-02 23:13:22,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901041419] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:22,256 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:13:22,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 13] total 38 [2021-11-02 23:13:22,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196310484] [2021-11-02 23:13:22,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-02 23:13:22,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:22,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-02 23:13:22,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=1025, Unknown=0, NotChecked=0, Total=1406 [2021-11-02 23:13:22,259 INFO L87 Difference]: Start difference. First operand 116 states and 118 transitions. Second operand has 38 states, 38 states have (on average 2.710526315789474) internal successors, (103), 38 states have internal predecessors, (103), 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) [2021-11-02 23:13:22,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:22,609 INFO L93 Difference]: Finished difference Result 193 states and 198 transitions. [2021-11-02 23:13:22,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-02 23:13:22,610 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.710526315789474) internal successors, (103), 38 states have internal predecessors, (103), 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 115 [2021-11-02 23:13:22,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:22,611 INFO L225 Difference]: With dead ends: 193 [2021-11-02 23:13:22,611 INFO L226 Difference]: Without dead ends: 128 [2021-11-02 23:13:22,612 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=396, Invalid=1244, Unknown=0, NotChecked=0, Total=1640 [2021-11-02 23:13:22,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-11-02 23:13:22,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 123. [2021-11-02 23:13:22,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.0245901639344261) internal successors, (125), 122 states have internal predecessors, (125), 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) [2021-11-02 23:13:22,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 125 transitions. [2021-11-02 23:13:22,620 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 125 transitions. Word has length 115 [2021-11-02 23:13:22,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:22,620 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 125 transitions. [2021-11-02 23:13:22,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.710526315789474) internal successors, (103), 38 states have internal predecessors, (103), 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) [2021-11-02 23:13:22,621 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 125 transitions. [2021-11-02 23:13:22,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-02 23:13:22,621 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:22,622 INFO L513 BasicCegarLoop]: trace histogram [25, 25, 14, 14, 14, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:22,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-02 23:13:22,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-02 23:13:22,835 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:13:22,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:22,835 INFO L85 PathProgramCache]: Analyzing trace with hash 528635727, now seen corresponding path program 19 times [2021-11-02 23:13:22,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:22,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251518666] [2021-11-02 23:13:22,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:22,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:22,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:23,302 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2021-11-02 23:13:23,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:23,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251518666] [2021-11-02 23:13:23,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251518666] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:23,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673934989] [2021-11-02 23:13:23,303 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:13:23,303 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:23,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:23,304 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:23,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-02 23:13:23,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:23,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-02 23:13:23,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:25,112 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2021-11-02 23:13:25,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673934989] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:25,113 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:13:25,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 54 [2021-11-02 23:13:25,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389097416] [2021-11-02 23:13:25,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-11-02 23:13:25,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:25,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-11-02 23:13:25,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1106, Invalid=1756, Unknown=0, NotChecked=0, Total=2862 [2021-11-02 23:13:25,116 INFO L87 Difference]: Start difference. First operand 123 states and 125 transitions. Second operand has 54 states, 54 states have (on average 2.185185185185185) internal successors, (118), 54 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:25,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:25,237 INFO L93 Difference]: Finished difference Result 196 states and 200 transitions. [2021-11-02 23:13:25,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-02 23:13:25,238 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.185185185185185) internal successors, (118), 54 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 122 [2021-11-02 23:13:25,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:25,239 INFO L225 Difference]: With dead ends: 196 [2021-11-02 23:13:25,239 INFO L226 Difference]: Without dead ends: 126 [2021-11-02 23:13:25,242 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1106, Invalid=1756, Unknown=0, NotChecked=0, Total=2862 [2021-11-02 23:13:25,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-11-02 23:13:25,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2021-11-02 23:13:25,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.0241935483870968) internal successors, (127), 124 states have internal predecessors, (127), 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) [2021-11-02 23:13:25,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 127 transitions. [2021-11-02 23:13:25,251 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 127 transitions. Word has length 122 [2021-11-02 23:13:25,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:25,251 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 127 transitions. [2021-11-02 23:13:25,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.185185185185185) internal successors, (118), 54 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:25,252 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 127 transitions. [2021-11-02 23:13:25,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-02 23:13:25,253 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:25,253 INFO L513 BasicCegarLoop]: trace histogram [26, 26, 14, 14, 14, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:25,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-02 23:13:25,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-02 23:13:25,466 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:13:25,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:25,467 INFO L85 PathProgramCache]: Analyzing trace with hash -763103791, now seen corresponding path program 20 times [2021-11-02 23:13:25,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:25,467 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741953916] [2021-11-02 23:13:25,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:25,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:25,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:25,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2021-11-02 23:13:25,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:25,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741953916] [2021-11-02 23:13:25,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741953916] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:25,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275753799] [2021-11-02 23:13:25,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:13:25,974 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:25,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:25,975 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:25,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-02 23:13:26,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:13:26,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:13:26,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-02 23:13:26,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:27,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2021-11-02 23:13:27,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275753799] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:27,914 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:13:27,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 56 [2021-11-02 23:13:27,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703823169] [2021-11-02 23:13:27,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-02 23:13:27,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:27,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-02 23:13:27,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1189, Invalid=1891, Unknown=0, NotChecked=0, Total=3080 [2021-11-02 23:13:27,919 INFO L87 Difference]: Start difference. First operand 125 states and 127 transitions. Second operand has 56 states, 56 states have (on average 2.1785714285714284) internal successors, (122), 56 states have internal predecessors, (122), 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) [2021-11-02 23:13:28,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:28,034 INFO L93 Difference]: Finished difference Result 198 states and 202 transitions. [2021-11-02 23:13:28,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-02 23:13:28,039 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.1785714285714284) internal successors, (122), 56 states have internal predecessors, (122), 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 124 [2021-11-02 23:13:28,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:28,040 INFO L225 Difference]: With dead ends: 198 [2021-11-02 23:13:28,040 INFO L226 Difference]: Without dead ends: 128 [2021-11-02 23:13:28,047 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1189, Invalid=1891, Unknown=0, NotChecked=0, Total=3080 [2021-11-02 23:13:28,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-11-02 23:13:28,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2021-11-02 23:13:28,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.0238095238095237) internal successors, (129), 126 states have internal predecessors, (129), 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) [2021-11-02 23:13:28,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 129 transitions. [2021-11-02 23:13:28,063 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 129 transitions. Word has length 124 [2021-11-02 23:13:28,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:28,063 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 129 transitions. [2021-11-02 23:13:28,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.1785714285714284) internal successors, (122), 56 states have internal predecessors, (122), 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) [2021-11-02 23:13:28,064 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 129 transitions. [2021-11-02 23:13:28,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-02 23:13:28,065 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:28,065 INFO L513 BasicCegarLoop]: trace histogram [27, 27, 14, 14, 14, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:28,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-02 23:13:28,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:28,290 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:13:28,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:28,291 INFO L85 PathProgramCache]: Analyzing trace with hash -879232045, now seen corresponding path program 21 times [2021-11-02 23:13:28,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:28,291 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852089483] [2021-11-02 23:13:28,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:28,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:28,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:28,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2021-11-02 23:13:28,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:28,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852089483] [2021-11-02 23:13:28,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852089483] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:28,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359083355] [2021-11-02 23:13:28,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:13:28,796 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:28,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:28,810 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:28,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-02 23:13:29,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-11-02 23:13:29,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:13:29,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-02 23:13:29,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:30,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 771 trivial. 0 not checked. [2021-11-02 23:13:30,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359083355] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:30,225 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:13:30,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 17] total 45 [2021-11-02 23:13:30,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027223291] [2021-11-02 23:13:30,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-02 23:13:30,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:30,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-02 23:13:30,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=570, Invalid=1410, Unknown=0, NotChecked=0, Total=1980 [2021-11-02 23:13:30,227 INFO L87 Difference]: Start difference. First operand 127 states and 129 transitions. Second operand has 45 states, 45 states have (on average 2.6222222222222222) internal successors, (118), 45 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:30,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:30,432 INFO L93 Difference]: Finished difference Result 284 states and 289 transitions. [2021-11-02 23:13:30,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-02 23:13:30,432 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.6222222222222222) internal successors, (118), 45 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2021-11-02 23:13:30,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:30,433 INFO L225 Difference]: With dead ends: 284 [2021-11-02 23:13:30,434 INFO L226 Difference]: Without dead ends: 214 [2021-11-02 23:13:30,435 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=570, Invalid=1410, Unknown=0, NotChecked=0, Total=1980 [2021-11-02 23:13:30,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-11-02 23:13:30,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 132. [2021-11-02 23:13:30,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.0229007633587786) internal successors, (134), 131 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) [2021-11-02 23:13:30,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 134 transitions. [2021-11-02 23:13:30,443 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 134 transitions. Word has length 126 [2021-11-02 23:13:30,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:30,443 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 134 transitions. [2021-11-02 23:13:30,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.6222222222222222) internal successors, (118), 45 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:30,444 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 134 transitions. [2021-11-02 23:13:30,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-02 23:13:30,445 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:30,445 INFO L513 BasicCegarLoop]: trace histogram [28, 28, 15, 15, 15, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:30,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-02 23:13:30,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-11-02 23:13:30,658 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:13:30,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:30,659 INFO L85 PathProgramCache]: Analyzing trace with hash -935507031, now seen corresponding path program 22 times [2021-11-02 23:13:30,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:30,659 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107689939] [2021-11-02 23:13:30,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:30,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:30,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:31,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2021-11-02 23:13:31,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:31,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107689939] [2021-11-02 23:13:31,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107689939] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:31,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693585851] [2021-11-02 23:13:31,262 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:13:31,262 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:31,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:31,263 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:31,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-02 23:13:32,002 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:13:32,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:13:32,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-02 23:13:32,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:32,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 826 trivial. 0 not checked. [2021-11-02 23:13:32,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693585851] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:32,559 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:13:32,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 18] total 47 [2021-11-02 23:13:32,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713489671] [2021-11-02 23:13:32,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-02 23:13:32,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:32,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-02 23:13:32,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=617, Invalid=1545, Unknown=0, NotChecked=0, Total=2162 [2021-11-02 23:13:32,561 INFO L87 Difference]: Start difference. First operand 132 states and 134 transitions. Second operand has 47 states, 47 states have (on average 2.617021276595745) internal successors, (123), 47 states have internal predecessors, (123), 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) [2021-11-02 23:13:32,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:32,801 INFO L93 Difference]: Finished difference Result 299 states and 304 transitions. [2021-11-02 23:13:32,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-02 23:13:32,802 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.617021276595745) internal successors, (123), 47 states have internal predecessors, (123), 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 131 [2021-11-02 23:13:32,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:32,803 INFO L225 Difference]: With dead ends: 299 [2021-11-02 23:13:32,803 INFO L226 Difference]: Without dead ends: 226 [2021-11-02 23:13:32,806 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=617, Invalid=1545, Unknown=0, NotChecked=0, Total=2162 [2021-11-02 23:13:32,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-11-02 23:13:32,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 137. [2021-11-02 23:13:32,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.0220588235294117) internal successors, (139), 136 states have internal predecessors, (139), 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) [2021-11-02 23:13:32,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 139 transitions. [2021-11-02 23:13:32,819 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 139 transitions. Word has length 131 [2021-11-02 23:13:32,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:32,820 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 139 transitions. [2021-11-02 23:13:32,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.617021276595745) internal successors, (123), 47 states have internal predecessors, (123), 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) [2021-11-02 23:13:32,820 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 139 transitions. [2021-11-02 23:13:32,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-02 23:13:32,821 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:32,821 INFO L513 BasicCegarLoop]: trace histogram [29, 29, 16, 16, 16, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:32,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-02 23:13:33,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:33,030 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:13:33,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:33,031 INFO L85 PathProgramCache]: Analyzing trace with hash -739810217, now seen corresponding path program 23 times [2021-11-02 23:13:33,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:33,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204648770] [2021-11-02 23:13:33,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:33,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:33,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:33,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1259 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 418 trivial. 0 not checked. [2021-11-02 23:13:33,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:33,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204648770] [2021-11-02 23:13:33,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204648770] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:33,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248369757] [2021-11-02 23:13:33,594 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:13:33,594 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:33,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:33,595 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:33,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-02 23:13:35,440 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2021-11-02 23:13:35,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:13:35,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-02 23:13:35,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:36,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1259 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 883 trivial. 0 not checked. [2021-11-02 23:13:36,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248369757] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:36,081 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:13:36,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 19] total 49 [2021-11-02 23:13:36,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454871915] [2021-11-02 23:13:36,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-02 23:13:36,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:36,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-02 23:13:36,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=1686, Unknown=0, NotChecked=0, Total=2352 [2021-11-02 23:13:36,084 INFO L87 Difference]: Start difference. First operand 137 states and 139 transitions. Second operand has 49 states, 49 states have (on average 2.6122448979591835) internal successors, (128), 49 states have internal predecessors, (128), 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) [2021-11-02 23:13:36,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:36,284 INFO L93 Difference]: Finished difference Result 314 states and 319 transitions. [2021-11-02 23:13:36,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-02 23:13:36,285 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.6122448979591835) internal successors, (128), 49 states have internal predecessors, (128), 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 136 [2021-11-02 23:13:36,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:36,286 INFO L225 Difference]: With dead ends: 314 [2021-11-02 23:13:36,286 INFO L226 Difference]: Without dead ends: 238 [2021-11-02 23:13:36,288 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=666, Invalid=1686, Unknown=0, NotChecked=0, Total=2352 [2021-11-02 23:13:36,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-11-02 23:13:36,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 142. [2021-11-02 23:13:36,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.0212765957446808) internal successors, (144), 141 states have internal predecessors, (144), 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) [2021-11-02 23:13:36,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 144 transitions. [2021-11-02 23:13:36,296 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 144 transitions. Word has length 136 [2021-11-02 23:13:36,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:36,297 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 144 transitions. [2021-11-02 23:13:36,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.6122448979591835) internal successors, (128), 49 states have internal predecessors, (128), 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) [2021-11-02 23:13:36,297 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 144 transitions. [2021-11-02 23:13:36,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-02 23:13:36,298 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:36,298 INFO L513 BasicCegarLoop]: trace histogram [30, 30, 17, 17, 17, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:36,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-02 23:13:36,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-11-02 23:13:36,514 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:13:36,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:36,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1877634853, now seen corresponding path program 24 times [2021-11-02 23:13:36,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:36,515 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114542479] [2021-11-02 23:13:36,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:36,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:36,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:37,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1367 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 467 trivial. 0 not checked. [2021-11-02 23:13:37,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:37,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114542479] [2021-11-02 23:13:37,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114542479] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:37,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649778854] [2021-11-02 23:13:37,193 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:13:37,193 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:37,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:37,194 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:37,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-02 23:13:42,987 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2021-11-02 23:13:42,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:13:42,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-02 23:13:42,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:43,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1367 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 1122 trivial. 0 not checked. [2021-11-02 23:13:43,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649778854] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:43,678 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:13:43,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 15] total 46 [2021-11-02 23:13:43,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901976550] [2021-11-02 23:13:43,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-02 23:13:43,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:43,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-02 23:13:43,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=564, Invalid=1506, Unknown=0, NotChecked=0, Total=2070 [2021-11-02 23:13:43,681 INFO L87 Difference]: Start difference. First operand 142 states and 144 transitions. Second operand has 46 states, 46 states have (on average 2.6739130434782608) internal successors, (123), 46 states have internal predecessors, (123), 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) [2021-11-02 23:13:44,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:44,004 INFO L93 Difference]: Finished difference Result 233 states and 238 transitions. [2021-11-02 23:13:44,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-02 23:13:44,005 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.6739130434782608) internal successors, (123), 46 states have internal predecessors, (123), 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 141 [2021-11-02 23:13:44,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:44,006 INFO L225 Difference]: With dead ends: 233 [2021-11-02 23:13:44,006 INFO L226 Difference]: Without dead ends: 154 [2021-11-02 23:13:44,007 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=579, Invalid=1773, Unknown=0, NotChecked=0, Total=2352 [2021-11-02 23:13:44,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-11-02 23:13:44,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 149. [2021-11-02 23:13:44,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.0202702702702702) internal successors, (151), 148 states have internal predecessors, (151), 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) [2021-11-02 23:13:44,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 151 transitions. [2021-11-02 23:13:44,018 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 151 transitions. Word has length 141 [2021-11-02 23:13:44,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:44,018 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 151 transitions. [2021-11-02 23:13:44,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.6739130434782608) internal successors, (123), 46 states have internal predecessors, (123), 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) [2021-11-02 23:13:44,019 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 151 transitions. [2021-11-02 23:13:44,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-02 23:13:44,019 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:44,020 INFO L513 BasicCegarLoop]: trace histogram [31, 31, 17, 17, 17, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:44,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-02 23:13:44,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-02 23:13:44,220 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:13:44,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:44,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1612833570, now seen corresponding path program 25 times [2021-11-02 23:13:44,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:44,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323227829] [2021-11-02 23:13:44,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:44,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:44,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:44,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1451 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2021-11-02 23:13:44,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:44,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323227829] [2021-11-02 23:13:44,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323227829] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:44,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703563438] [2021-11-02 23:13:44,853 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:13:44,854 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:44,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:44,854 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:44,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-02 23:13:45,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:45,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-02 23:13:45,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:47,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1451 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2021-11-02 23:13:47,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703563438] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:47,285 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:13:47,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 66 [2021-11-02 23:13:47,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297548087] [2021-11-02 23:13:47,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-11-02 23:13:47,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:47,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-11-02 23:13:47,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1649, Invalid=2641, Unknown=0, NotChecked=0, Total=4290 [2021-11-02 23:13:47,287 INFO L87 Difference]: Start difference. First operand 149 states and 151 transitions. Second operand has 66 states, 66 states have (on average 2.1515151515151514) internal successors, (142), 66 states have internal predecessors, (142), 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) [2021-11-02 23:13:47,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:47,408 INFO L93 Difference]: Finished difference Result 236 states and 240 transitions. [2021-11-02 23:13:47,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-02 23:13:47,409 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.1515151515151514) internal successors, (142), 66 states have internal predecessors, (142), 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 148 [2021-11-02 23:13:47,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:47,410 INFO L225 Difference]: With dead ends: 236 [2021-11-02 23:13:47,410 INFO L226 Difference]: Without dead ends: 152 [2021-11-02 23:13:47,411 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1649, Invalid=2641, Unknown=0, NotChecked=0, Total=4290 [2021-11-02 23:13:47,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-11-02 23:13:47,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2021-11-02 23:13:47,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.02) internal successors, (153), 150 states have internal predecessors, (153), 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) [2021-11-02 23:13:47,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 153 transitions. [2021-11-02 23:13:47,419 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 153 transitions. Word has length 148 [2021-11-02 23:13:47,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:47,420 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 153 transitions. [2021-11-02 23:13:47,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.1515151515151514) internal successors, (142), 66 states have internal predecessors, (142), 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) [2021-11-02 23:13:47,420 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 153 transitions. [2021-11-02 23:13:47,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-02 23:13:47,421 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:47,421 INFO L513 BasicCegarLoop]: trace histogram [32, 32, 17, 17, 17, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:47,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-02 23:13:47,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:47,642 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:13:47,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:47,642 INFO L85 PathProgramCache]: Analyzing trace with hash -954155808, now seen corresponding path program 26 times [2021-11-02 23:13:47,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:47,643 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780567535] [2021-11-02 23:13:47,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:47,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:47,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:48,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1514 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2021-11-02 23:13:48,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:48,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780567535] [2021-11-02 23:13:48,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780567535] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:48,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386350284] [2021-11-02 23:13:48,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:13:48,298 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:48,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:48,299 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:48,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-02 23:13:49,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:13:49,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:13:49,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-02 23:13:49,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:50,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1514 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2021-11-02 23:13:50,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386350284] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:50,916 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:13:50,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 68 [2021-11-02 23:13:50,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233782837] [2021-11-02 23:13:50,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-11-02 23:13:50,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:50,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-11-02 23:13:50,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1750, Invalid=2806, Unknown=0, NotChecked=0, Total=4556 [2021-11-02 23:13:50,919 INFO L87 Difference]: Start difference. First operand 151 states and 153 transitions. Second operand has 68 states, 68 states have (on average 2.1470588235294117) internal successors, (146), 68 states have internal predecessors, (146), 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) [2021-11-02 23:13:51,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:51,030 INFO L93 Difference]: Finished difference Result 238 states and 242 transitions. [2021-11-02 23:13:51,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-02 23:13:51,031 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.1470588235294117) internal successors, (146), 68 states have internal predecessors, (146), 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 150 [2021-11-02 23:13:51,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:51,032 INFO L225 Difference]: With dead ends: 238 [2021-11-02 23:13:51,032 INFO L226 Difference]: Without dead ends: 154 [2021-11-02 23:13:51,033 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1750, Invalid=2806, Unknown=0, NotChecked=0, Total=4556 [2021-11-02 23:13:51,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-11-02 23:13:51,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2021-11-02 23:13:51,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.019736842105263) internal successors, (155), 152 states have internal predecessors, (155), 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) [2021-11-02 23:13:51,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 155 transitions. [2021-11-02 23:13:51,043 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 155 transitions. Word has length 150 [2021-11-02 23:13:51,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:51,043 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 155 transitions. [2021-11-02 23:13:51,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.1470588235294117) internal successors, (146), 68 states have internal predecessors, (146), 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) [2021-11-02 23:13:51,044 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 155 transitions. [2021-11-02 23:13:51,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-02 23:13:51,045 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:51,045 INFO L513 BasicCegarLoop]: trace histogram [33, 33, 17, 17, 17, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:51,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-02 23:13:51,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:51,270 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:13:51,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:51,271 INFO L85 PathProgramCache]: Analyzing trace with hash 674980962, now seen corresponding path program 27 times [2021-11-02 23:13:51,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:51,271 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195175974] [2021-11-02 23:13:51,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:51,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:51,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:51,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1579 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2021-11-02 23:13:51,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:51,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195175974] [2021-11-02 23:13:51,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195175974] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:51,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901411718] [2021-11-02 23:13:51,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:13:51,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:51,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:51,991 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:52,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-02 23:13:53,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-11-02 23:13:53,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:13:53,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-02 23:13:53,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:53,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1579 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 1154 trivial. 0 not checked. [2021-11-02 23:13:53,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901411718] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:53,966 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:13:53,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 20] total 54 [2021-11-02 23:13:53,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81505376] [2021-11-02 23:13:53,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-11-02 23:13:53,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:53,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-11-02 23:13:53,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=819, Invalid=2043, Unknown=0, NotChecked=0, Total=2862 [2021-11-02 23:13:53,968 INFO L87 Difference]: Start difference. First operand 153 states and 155 transitions. Second operand has 54 states, 54 states have (on average 2.574074074074074) internal successors, (139), 54 states have internal predecessors, (139), 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) [2021-11-02 23:13:54,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:54,221 INFO L93 Difference]: Finished difference Result 338 states and 343 transitions. [2021-11-02 23:13:54,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-02 23:13:54,222 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.574074074074074) internal successors, (139), 54 states have internal predecessors, (139), 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 152 [2021-11-02 23:13:54,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:54,224 INFO L225 Difference]: With dead ends: 338 [2021-11-02 23:13:54,224 INFO L226 Difference]: Without dead ends: 254 [2021-11-02 23:13:54,225 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=819, Invalid=2043, Unknown=0, NotChecked=0, Total=2862 [2021-11-02 23:13:54,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-11-02 23:13:54,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 158. [2021-11-02 23:13:54,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.019108280254777) internal successors, (160), 157 states have internal predecessors, (160), 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) [2021-11-02 23:13:54,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 160 transitions. [2021-11-02 23:13:54,233 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 160 transitions. Word has length 152 [2021-11-02 23:13:54,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:54,233 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 160 transitions. [2021-11-02 23:13:54,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.574074074074074) internal successors, (139), 54 states have internal predecessors, (139), 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) [2021-11-02 23:13:54,234 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 160 transitions. [2021-11-02 23:13:54,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-02 23:13:54,234 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:54,234 INFO L513 BasicCegarLoop]: trace histogram [34, 34, 18, 18, 18, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:54,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-02 23:13:54,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-02 23:13:54,435 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:13:54,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:54,435 INFO L85 PathProgramCache]: Analyzing trace with hash -191544288, now seen corresponding path program 28 times [2021-11-02 23:13:54,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:54,435 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124431498] [2021-11-02 23:13:54,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:54,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:54,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:55,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1698 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 542 trivial. 0 not checked. [2021-11-02 23:13:55,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:55,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124431498] [2021-11-02 23:13:55,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124431498] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:55,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978035216] [2021-11-02 23:13:55,295 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:13:55,295 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:55,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:55,298 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:55,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-02 23:13:56,341 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:13:56,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:13:56,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-02 23:13:56,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:57,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1698 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 1221 trivial. 0 not checked. [2021-11-02 23:13:57,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978035216] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:57,050 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:13:57,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 21] total 56 [2021-11-02 23:13:57,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782306438] [2021-11-02 23:13:57,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-02 23:13:57,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:57,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-02 23:13:57,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=875, Invalid=2205, Unknown=0, NotChecked=0, Total=3080 [2021-11-02 23:13:57,052 INFO L87 Difference]: Start difference. First operand 158 states and 160 transitions. Second operand has 56 states, 56 states have (on average 2.5714285714285716) internal successors, (144), 56 states have internal predecessors, (144), 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) [2021-11-02 23:13:57,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:57,287 INFO L93 Difference]: Finished difference Result 353 states and 358 transitions. [2021-11-02 23:13:57,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-11-02 23:13:57,290 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.5714285714285716) internal successors, (144), 56 states have internal predecessors, (144), 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 157 [2021-11-02 23:13:57,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:57,292 INFO L225 Difference]: With dead ends: 353 [2021-11-02 23:13:57,292 INFO L226 Difference]: Without dead ends: 266 [2021-11-02 23:13:57,293 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=875, Invalid=2205, Unknown=0, NotChecked=0, Total=3080 [2021-11-02 23:13:57,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-11-02 23:13:57,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 163. [2021-11-02 23:13:57,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.0185185185185186) internal successors, (165), 162 states have internal predecessors, (165), 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) [2021-11-02 23:13:57,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 165 transitions. [2021-11-02 23:13:57,303 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 165 transitions. Word has length 157 [2021-11-02 23:13:57,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:57,304 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 165 transitions. [2021-11-02 23:13:57,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.5714285714285716) internal successors, (144), 56 states have internal predecessors, (144), 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) [2021-11-02 23:13:57,304 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 165 transitions. [2021-11-02 23:13:57,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-11-02 23:13:57,305 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:57,305 INFO L513 BasicCegarLoop]: trace histogram [35, 35, 19, 19, 19, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:57,336 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-11-02 23:13:57,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-02 23:13:57,520 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:13:57,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:57,521 INFO L85 PathProgramCache]: Analyzing trace with hash -2107746586, now seen corresponding path program 29 times [2021-11-02 23:13:57,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:57,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006888005] [2021-11-02 23:13:57,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:57,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:57,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:58,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1822 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 597 trivial. 0 not checked. [2021-11-02 23:13:58,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:58,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006888005] [2021-11-02 23:13:58,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006888005] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:58,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352953980] [2021-11-02 23:13:58,339 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:13:58,339 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:58,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:58,341 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:58,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-02 23:14:00,677 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2021-11-02 23:14:00,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:14:00,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-02 23:14:00,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:14:01,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1822 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 1290 trivial. 0 not checked. [2021-11-02 23:14:01,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352953980] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:14:01,523 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:14:01,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 22] total 58 [2021-11-02 23:14:01,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862786584] [2021-11-02 23:14:01,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-11-02 23:14:01,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:14:01,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-11-02 23:14:01,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=933, Invalid=2373, Unknown=0, NotChecked=0, Total=3306 [2021-11-02 23:14:01,525 INFO L87 Difference]: Start difference. First operand 163 states and 165 transitions. Second operand has 58 states, 58 states have (on average 2.5689655172413794) internal successors, (149), 58 states have internal predecessors, (149), 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) [2021-11-02 23:14:01,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:14:01,830 INFO L93 Difference]: Finished difference Result 368 states and 373 transitions. [2021-11-02 23:14:01,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-11-02 23:14:01,831 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.5689655172413794) internal successors, (149), 58 states have internal predecessors, (149), 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 162 [2021-11-02 23:14:01,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:14:01,833 INFO L225 Difference]: With dead ends: 368 [2021-11-02 23:14:01,833 INFO L226 Difference]: Without dead ends: 278 [2021-11-02 23:14:01,834 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=933, Invalid=2373, Unknown=0, NotChecked=0, Total=3306 [2021-11-02 23:14:01,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-11-02 23:14:01,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 168. [2021-11-02 23:14:01,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.0179640718562875) internal successors, (170), 167 states have internal predecessors, (170), 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) [2021-11-02 23:14:01,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 170 transitions. [2021-11-02 23:14:01,850 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 170 transitions. Word has length 162 [2021-11-02 23:14:01,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:14:01,851 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 170 transitions. [2021-11-02 23:14:01,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.5689655172413794) internal successors, (149), 58 states have internal predecessors, (149), 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) [2021-11-02 23:14:01,851 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 170 transitions. [2021-11-02 23:14:01,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-11-02 23:14:01,852 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:14:01,853 INFO L513 BasicCegarLoop]: trace histogram [36, 36, 20, 20, 20, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:14:01,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-02 23:14:02,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-02 23:14:02,078 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:14:02,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:14:02,079 INFO L85 PathProgramCache]: Analyzing trace with hash -493191780, now seen corresponding path program 30 times [2021-11-02 23:14:02,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:14:02,079 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961261757] [2021-11-02 23:14:02,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:14:02,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:14:02,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:02,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1951 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 655 trivial. 0 not checked. [2021-11-02 23:14:02,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:14:02,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961261757] [2021-11-02 23:14:02,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961261757] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:14:02,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481870148] [2021-11-02 23:14:02,897 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:14:02,898 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:14:02,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:14:02,898 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:14:02,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-02 23:14:12,488 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2021-11-02 23:14:12,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:14:12,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-02 23:14:12,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:14:13,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1951 backedges. 0 proven. 689 refuted. 0 times theorem prover too weak. 1262 trivial. 0 not checked. [2021-11-02 23:14:13,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481870148] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:14:13,429 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:14:13,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 22] total 59 [2021-11-02 23:14:13,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168104763] [2021-11-02 23:14:13,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-11-02 23:14:13,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:14:13,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-11-02 23:14:13,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=794, Invalid=2628, Unknown=0, NotChecked=0, Total=3422 [2021-11-02 23:14:13,432 INFO L87 Difference]: Start difference. First operand 168 states and 170 transitions. Second operand has 59 states, 59 states have (on average 2.593220338983051) internal successors, (153), 59 states have internal predecessors, (153), 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) [2021-11-02 23:14:14,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:14:14,022 INFO L93 Difference]: Finished difference Result 273 states and 278 transitions. [2021-11-02 23:14:14,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-11-02 23:14:14,022 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.593220338983051) internal successors, (153), 59 states have internal predecessors, (153), 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 167 [2021-11-02 23:14:14,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:14:14,024 INFO L225 Difference]: With dead ends: 273 [2021-11-02 23:14:14,024 INFO L226 Difference]: Without dead ends: 180 [2021-11-02 23:14:14,025 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=959, Invalid=3331, Unknown=0, NotChecked=0, Total=4290 [2021-11-02 23:14:14,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-11-02 23:14:14,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 175. [2021-11-02 23:14:14,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.0172413793103448) internal successors, (177), 174 states have internal predecessors, (177), 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) [2021-11-02 23:14:14,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 177 transitions. [2021-11-02 23:14:14,036 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 177 transitions. Word has length 167 [2021-11-02 23:14:14,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:14:14,036 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 177 transitions. [2021-11-02 23:14:14,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.593220338983051) internal successors, (153), 59 states have internal predecessors, (153), 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) [2021-11-02 23:14:14,036 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 177 transitions. [2021-11-02 23:14:14,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-02 23:14:14,037 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:14:14,038 INFO L513 BasicCegarLoop]: trace histogram [37, 37, 20, 20, 20, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:14:14,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-02 23:14:14,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-02 23:14:14,238 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:14:14,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:14:14,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1405878855, now seen corresponding path program 31 times [2021-11-02 23:14:14,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:14:14,239 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534294799] [2021-11-02 23:14:14,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:14:14,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:14:14,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:15,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2052 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 683 trivial. 0 not checked. [2021-11-02 23:14:15,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:14:15,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534294799] [2021-11-02 23:14:15,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534294799] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:14:15,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592866712] [2021-11-02 23:14:15,240 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:14:15,240 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:14:15,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:14:15,242 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:14:15,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-02 23:14:16,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:16,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-02 23:14:16,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:14:18,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2052 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 683 trivial. 0 not checked. [2021-11-02 23:14:18,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592866712] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:14:18,472 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:14:18,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 78 [2021-11-02 23:14:18,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908110922] [2021-11-02 23:14:18,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2021-11-02 23:14:18,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:14:18,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-11-02 23:14:18,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2300, Invalid=3706, Unknown=0, NotChecked=0, Total=6006 [2021-11-02 23:14:18,474 INFO L87 Difference]: Start difference. First operand 175 states and 177 transitions. Second operand has 78 states, 78 states have (on average 2.128205128205128) internal successors, (166), 78 states have internal predecessors, (166), 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) [2021-11-02 23:14:18,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:14:18,600 INFO L93 Difference]: Finished difference Result 276 states and 280 transitions. [2021-11-02 23:14:18,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-02 23:14:18,601 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.128205128205128) internal successors, (166), 78 states have internal predecessors, (166), 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 174 [2021-11-02 23:14:18,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:14:18,602 INFO L225 Difference]: With dead ends: 276 [2021-11-02 23:14:18,602 INFO L226 Difference]: Without dead ends: 178 [2021-11-02 23:14:18,603 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2300, Invalid=3706, Unknown=0, NotChecked=0, Total=6006 [2021-11-02 23:14:18,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-11-02 23:14:18,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 177. [2021-11-02 23:14:18,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 1.0170454545454546) internal successors, (179), 176 states have internal predecessors, (179), 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) [2021-11-02 23:14:18,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 179 transitions. [2021-11-02 23:14:18,614 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 179 transitions. Word has length 174 [2021-11-02 23:14:18,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:14:18,615 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 179 transitions. [2021-11-02 23:14:18,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.128205128205128) internal successors, (166), 78 states have internal predecessors, (166), 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) [2021-11-02 23:14:18,615 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 179 transitions. [2021-11-02 23:14:18,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-02 23:14:18,616 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:14:18,617 INFO L513 BasicCegarLoop]: trace histogram [38, 38, 20, 20, 20, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:14:18,642 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-11-02 23:14:18,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:14:18,827 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:14:18,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:14:18,827 INFO L85 PathProgramCache]: Analyzing trace with hash 698926025, now seen corresponding path program 32 times [2021-11-02 23:14:18,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:14:18,827 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270707625] [2021-11-02 23:14:18,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:14:18,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:14:18,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:19,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2127 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 683 trivial. 0 not checked. [2021-11-02 23:14:19,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:14:19,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270707625] [2021-11-02 23:14:19,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270707625] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:14:19,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201509819] [2021-11-02 23:14:19,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:14:19,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:14:19,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:14:19,890 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:14:19,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-02 23:14:21,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:14:21,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:14:21,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-02 23:14:21,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:14:23,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2127 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 683 trivial. 0 not checked. [2021-11-02 23:14:23,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201509819] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:14:23,289 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:14:23,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 80 [2021-11-02 23:14:23,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745319528] [2021-11-02 23:14:23,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-11-02 23:14:23,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:14:23,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-11-02 23:14:23,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2419, Invalid=3901, Unknown=0, NotChecked=0, Total=6320 [2021-11-02 23:14:23,292 INFO L87 Difference]: Start difference. First operand 177 states and 179 transitions. Second operand has 80 states, 80 states have (on average 2.125) internal successors, (170), 80 states have internal predecessors, (170), 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) [2021-11-02 23:14:23,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:14:23,432 INFO L93 Difference]: Finished difference Result 278 states and 282 transitions. [2021-11-02 23:14:23,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-02 23:14:23,433 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.125) internal successors, (170), 80 states have internal predecessors, (170), 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 176 [2021-11-02 23:14:23,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:14:23,435 INFO L225 Difference]: With dead ends: 278 [2021-11-02 23:14:23,435 INFO L226 Difference]: Without dead ends: 180 [2021-11-02 23:14:23,436 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2419, Invalid=3901, Unknown=0, NotChecked=0, Total=6320 [2021-11-02 23:14:23,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-11-02 23:14:23,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 179. [2021-11-02 23:14:23,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 1.0168539325842696) internal successors, (181), 178 states have internal predecessors, (181), 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) [2021-11-02 23:14:23,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 181 transitions. [2021-11-02 23:14:23,448 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 181 transitions. Word has length 176 [2021-11-02 23:14:23,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:14:23,449 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 181 transitions. [2021-11-02 23:14:23,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.125) internal successors, (170), 80 states have internal predecessors, (170), 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) [2021-11-02 23:14:23,449 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 181 transitions. [2021-11-02 23:14:23,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-02 23:14:23,450 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:14:23,450 INFO L513 BasicCegarLoop]: trace histogram [39, 39, 20, 20, 20, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:14:23,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-02 23:14:23,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:14:23,670 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:14:23,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:14:23,671 INFO L85 PathProgramCache]: Analyzing trace with hash -77910837, now seen corresponding path program 33 times [2021-11-02 23:14:23,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:14:23,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282835313] [2021-11-02 23:14:23,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:14:23,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:14:23,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:24,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2204 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 683 trivial. 0 not checked. [2021-11-02 23:14:24,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:14:24,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282835313] [2021-11-02 23:14:24,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282835313] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:14:24,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824070105] [2021-11-02 23:14:24,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:14:24,591 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:14:24,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:14:24,592 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:14:24,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-02 23:14:26,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2021-11-02 23:14:26,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:14:26,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-02 23:14:26,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:14:27,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2204 backedges. 77 proven. 590 refuted. 0 times theorem prover too weak. 1537 trivial. 0 not checked. [2021-11-02 23:14:27,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824070105] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:14:27,236 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:14:27,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 26] total 66 [2021-11-02 23:14:27,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028082877] [2021-11-02 23:14:27,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-11-02 23:14:27,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:14:27,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-11-02 23:14:27,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1242, Invalid=3048, Unknown=0, NotChecked=0, Total=4290 [2021-11-02 23:14:27,238 INFO L87 Difference]: Start difference. First operand 179 states and 181 transitions. Second operand has 66 states, 66 states have (on average 2.4545454545454546) internal successors, (162), 66 states have internal predecessors, (162), 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) [2021-11-02 23:14:28,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:14:28,136 INFO L93 Difference]: Finished difference Result 393 states and 399 transitions. [2021-11-02 23:14:28,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-11-02 23:14:28,137 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.4545454545454546) internal successors, (162), 66 states have internal predecessors, (162), 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 178 [2021-11-02 23:14:28,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:14:28,139 INFO L225 Difference]: With dead ends: 393 [2021-11-02 23:14:28,139 INFO L226 Difference]: Without dead ends: 295 [2021-11-02 23:14:28,140 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1134 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1767, Invalid=5715, Unknown=0, NotChecked=0, Total=7482 [2021-11-02 23:14:28,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-11-02 23:14:28,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 186. [2021-11-02 23:14:28,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.0162162162162163) internal successors, (188), 185 states have internal predecessors, (188), 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) [2021-11-02 23:14:28,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 188 transitions. [2021-11-02 23:14:28,154 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 188 transitions. Word has length 178 [2021-11-02 23:14:28,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:14:28,155 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 188 transitions. [2021-11-02 23:14:28,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.4545454545454546) internal successors, (162), 66 states have internal predecessors, (162), 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) [2021-11-02 23:14:28,155 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 188 transitions. [2021-11-02 23:14:28,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-02 23:14:28,156 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:14:28,156 INFO L513 BasicCegarLoop]: trace histogram [41, 41, 21, 21, 21, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:14:28,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-02 23:14:28,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-11-02 23:14:28,382 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:14:28,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:14:28,383 INFO L85 PathProgramCache]: Analyzing trace with hash 262194479, now seen corresponding path program 34 times [2021-11-02 23:14:28,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:14:28,383 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597071628] [2021-11-02 23:14:28,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:14:28,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:14:28,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:29,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2425 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 744 trivial. 0 not checked. [2021-11-02 23:14:29,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:14:29,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597071628] [2021-11-02 23:14:29,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597071628] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:14:29,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199193133] [2021-11-02 23:14:29,333 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:14:29,333 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:14:29,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:14:29,334 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:14:29,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-02 23:14:30,699 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:14:30,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:14:30,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-02 23:14:30,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:14:31,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2425 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 1774 trivial. 0 not checked. [2021-11-02 23:14:31,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199193133] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:14:31,619 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:14:31,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 24] total 66 [2021-11-02 23:14:31,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947444356] [2021-11-02 23:14:31,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-11-02 23:14:31,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:14:31,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-11-02 23:14:31,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1221, Invalid=3069, Unknown=0, NotChecked=0, Total=4290 [2021-11-02 23:14:31,621 INFO L87 Difference]: Start difference. First operand 186 states and 188 transitions. Second operand has 66 states, 66 states have (on average 2.5303030303030303) internal successors, (167), 66 states have internal predecessors, (167), 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) [2021-11-02 23:14:31,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:14:31,921 INFO L93 Difference]: Finished difference Result 409 states and 414 transitions. [2021-11-02 23:14:31,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-11-02 23:14:31,922 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.5303030303030303) internal successors, (167), 66 states have internal predecessors, (167), 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 185 [2021-11-02 23:14:31,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:14:31,923 INFO L225 Difference]: With dead ends: 409 [2021-11-02 23:14:31,923 INFO L226 Difference]: Without dead ends: 308 [2021-11-02 23:14:31,924 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1221, Invalid=3069, Unknown=0, NotChecked=0, Total=4290 [2021-11-02 23:14:31,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-11-02 23:14:31,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 191. [2021-11-02 23:14:31,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.0157894736842106) internal successors, (193), 190 states have internal predecessors, (193), 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) [2021-11-02 23:14:31,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 193 transitions. [2021-11-02 23:14:31,938 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 193 transitions. Word has length 185 [2021-11-02 23:14:31,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:14:31,939 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 193 transitions. [2021-11-02 23:14:31,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.5303030303030303) internal successors, (167), 66 states have internal predecessors, (167), 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) [2021-11-02 23:14:31,939 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 193 transitions. [2021-11-02 23:14:31,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-02 23:14:31,941 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:14:31,941 INFO L513 BasicCegarLoop]: trace histogram [42, 42, 22, 22, 22, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:14:31,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-02 23:14:32,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:14:32,156 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:14:32,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:14:32,156 INFO L85 PathProgramCache]: Analyzing trace with hash -2065965231, now seen corresponding path program 35 times [2021-11-02 23:14:32,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:14:32,156 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114127245] [2021-11-02 23:14:32,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:14:32,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:14:32,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:33,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2572 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 808 trivial. 0 not checked. [2021-11-02 23:14:33,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:14:33,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114127245] [2021-11-02 23:14:33,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114127245] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:14:33,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460396267] [2021-11-02 23:14:33,143 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:14:33,143 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:14:33,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:14:33,144 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:14:33,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-02 23:15:27,784 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2021-11-02 23:15:27,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:15:27,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-02 23:15:27,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:15:28,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2572 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 1857 trivial. 0 not checked. [2021-11-02 23:15:28,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460396267] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:15:28,808 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:15:28,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 25] total 68 [2021-11-02 23:15:28,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878806889] [2021-11-02 23:15:28,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-11-02 23:15:28,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:15:28,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-11-02 23:15:28,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1289, Invalid=3267, Unknown=0, NotChecked=0, Total=4556 [2021-11-02 23:15:28,809 INFO L87 Difference]: Start difference. First operand 191 states and 193 transitions. Second operand has 68 states, 68 states have (on average 2.5294117647058822) internal successors, (172), 68 states have internal predecessors, (172), 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) [2021-11-02 23:15:29,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:15:29,133 INFO L93 Difference]: Finished difference Result 424 states and 429 transitions. [2021-11-02 23:15:29,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-11-02 23:15:29,133 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.5294117647058822) internal successors, (172), 68 states have internal predecessors, (172), 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 190 [2021-11-02 23:15:29,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:15:29,134 INFO L225 Difference]: With dead ends: 424 [2021-11-02 23:15:29,134 INFO L226 Difference]: Without dead ends: 320 [2021-11-02 23:15:29,135 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 966 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1289, Invalid=3267, Unknown=0, NotChecked=0, Total=4556 [2021-11-02 23:15:29,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-11-02 23:15:29,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 196. [2021-11-02 23:15:29,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.0153846153846153) internal successors, (198), 195 states have internal predecessors, (198), 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) [2021-11-02 23:15:29,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 198 transitions. [2021-11-02 23:15:29,149 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 198 transitions. Word has length 190 [2021-11-02 23:15:29,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:15:29,149 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 198 transitions. [2021-11-02 23:15:29,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.5294117647058822) internal successors, (172), 68 states have internal predecessors, (172), 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) [2021-11-02 23:15:29,150 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 198 transitions. [2021-11-02 23:15:29,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-02 23:15:29,151 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:15:29,151 INFO L513 BasicCegarLoop]: trace histogram [43, 43, 23, 23, 23, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:15:29,198 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-11-02 23:15:29,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-11-02 23:15:29,376 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:15:29,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:15:29,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1135574827, now seen corresponding path program 36 times [2021-11-02 23:15:29,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:15:29,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913105599] [2021-11-02 23:15:29,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:15:29,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:15:29,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:30,559 INFO L134 CoverageAnalysis]: Checked inductivity of 2724 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 875 trivial. 0 not checked. [2021-11-02 23:15:30,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:15:30,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913105599] [2021-11-02 23:15:30,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913105599] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:15:30,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681216584] [2021-11-02 23:15:30,560 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:15:30,560 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:15:30,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:15:30,561 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:15:30,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-02 23:15:56,795 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 41 check-sat command(s) [2021-11-02 23:15:56,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:15:56,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-02 23:15:56,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:15:57,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2724 backedges. 0 proven. 483 refuted. 0 times theorem prover too weak. 2241 trivial. 0 not checked. [2021-11-02 23:15:57,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681216584] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:15:57,865 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:15:57,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 19] total 63 [2021-11-02 23:15:57,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689836804] [2021-11-02 23:15:57,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-02 23:15:57,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:15:57,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-02 23:15:57,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=2823, Unknown=0, NotChecked=0, Total=3906 [2021-11-02 23:15:57,868 INFO L87 Difference]: Start difference. First operand 196 states and 198 transitions. Second operand has 63 states, 63 states have (on average 2.619047619047619) internal successors, (165), 63 states have internal predecessors, (165), 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) [2021-11-02 23:15:58,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:15:58,527 INFO L93 Difference]: Finished difference Result 315 states and 320 transitions. [2021-11-02 23:15:58,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-11-02 23:15:58,528 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.619047619047619) internal successors, (165), 63 states have internal predecessors, (165), 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 195 [2021-11-02 23:15:58,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:15:58,529 INFO L225 Difference]: With dead ends: 315 [2021-11-02 23:15:58,529 INFO L226 Difference]: Without dead ends: 208 [2021-11-02 23:15:58,529 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1098, Invalid=3192, Unknown=0, NotChecked=0, Total=4290 [2021-11-02 23:15:58,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-11-02 23:15:58,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 203. [2021-11-02 23:15:58,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 1.0148514851485149) internal successors, (205), 202 states have internal predecessors, (205), 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) [2021-11-02 23:15:58,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 205 transitions. [2021-11-02 23:15:58,543 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 205 transitions. Word has length 195 [2021-11-02 23:15:58,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:15:58,543 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 205 transitions. [2021-11-02 23:15:58,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.619047619047619) internal successors, (165), 63 states have internal predecessors, (165), 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) [2021-11-02 23:15:58,544 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 205 transitions. [2021-11-02 23:15:58,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-11-02 23:15:58,545 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:15:58,545 INFO L513 BasicCegarLoop]: trace histogram [44, 44, 23, 23, 23, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:15:58,594 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-11-02 23:15:58,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-11-02 23:15:58,760 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:15:58,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:15:58,761 INFO L85 PathProgramCache]: Analyzing trace with hash -90608872, now seen corresponding path program 37 times [2021-11-02 23:15:58,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:15:58,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402545251] [2021-11-02 23:15:58,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:15:58,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:15:58,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:59,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2844 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 908 trivial. 0 not checked. [2021-11-02 23:15:59,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:15:59,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402545251] [2021-11-02 23:15:59,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402545251] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:15:59,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147821367] [2021-11-02 23:15:59,932 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:15:59,932 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:15:59,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:15:59,938 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:15:59,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-02 23:16:01,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:16:01,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-02 23:16:01,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:16:04,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2844 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 908 trivial. 0 not checked. [2021-11-02 23:16:04,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147821367] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:16:04,100 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:16:04,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 92 [2021-11-02 23:16:04,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59132917] [2021-11-02 23:16:04,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2021-11-02 23:16:04,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:16:04,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-11-02 23:16:04,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3196, Invalid=5176, Unknown=0, NotChecked=0, Total=8372 [2021-11-02 23:16:04,102 INFO L87 Difference]: Start difference. First operand 203 states and 205 transitions. Second operand has 92 states, 92 states have (on average 2.108695652173913) internal successors, (194), 92 states have internal predecessors, (194), 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) [2021-11-02 23:16:04,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:16:04,245 INFO L93 Difference]: Finished difference Result 318 states and 322 transitions. [2021-11-02 23:16:04,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-02 23:16:04,246 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.108695652173913) internal successors, (194), 92 states have internal predecessors, (194), 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 202 [2021-11-02 23:16:04,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:16:04,247 INFO L225 Difference]: With dead ends: 318 [2021-11-02 23:16:04,247 INFO L226 Difference]: Without dead ends: 206 [2021-11-02 23:16:04,248 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3196, Invalid=5176, Unknown=0, NotChecked=0, Total=8372 [2021-11-02 23:16:04,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-11-02 23:16:04,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 205. [2021-11-02 23:16:04,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.0147058823529411) internal successors, (207), 204 states have internal predecessors, (207), 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) [2021-11-02 23:16:04,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 207 transitions. [2021-11-02 23:16:04,262 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 207 transitions. Word has length 202 [2021-11-02 23:16:04,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:16:04,262 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 207 transitions. [2021-11-02 23:16:04,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.108695652173913) internal successors, (194), 92 states have internal predecessors, (194), 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) [2021-11-02 23:16:04,263 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 207 transitions. [2021-11-02 23:16:04,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-11-02 23:16:04,264 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:16:04,265 INFO L513 BasicCegarLoop]: trace histogram [45, 45, 23, 23, 23, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:16:04,302 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-11-02 23:16:04,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-11-02 23:16:04,478 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:16:04,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:16:04,479 INFO L85 PathProgramCache]: Analyzing trace with hash -464734822, now seen corresponding path program 38 times [2021-11-02 23:16:04,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:16:04,479 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118751966] [2021-11-02 23:16:04,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:16:04,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:16:04,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:16:05,611 INFO L134 CoverageAnalysis]: Checked inductivity of 2933 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 908 trivial. 0 not checked. [2021-11-02 23:16:05,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:16:05,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118751966] [2021-11-02 23:16:05,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118751966] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:16:05,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184391340] [2021-11-02 23:16:05,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:16:05,612 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:16:05,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:16:05,614 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:16:05,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-02 23:16:07,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:16:07,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:16:07,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-02 23:16:07,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:16:09,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2933 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 908 trivial. 0 not checked. [2021-11-02 23:16:09,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184391340] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:16:09,964 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:16:09,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 94 [2021-11-02 23:16:09,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566937360] [2021-11-02 23:16:09,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2021-11-02 23:16:09,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:16:09,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-11-02 23:16:09,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3336, Invalid=5406, Unknown=0, NotChecked=0, Total=8742 [2021-11-02 23:16:09,967 INFO L87 Difference]: Start difference. First operand 205 states and 207 transitions. Second operand has 94 states, 94 states have (on average 2.106382978723404) internal successors, (198), 94 states have internal predecessors, (198), 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) [2021-11-02 23:16:10,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:16:10,127 INFO L93 Difference]: Finished difference Result 320 states and 324 transitions. [2021-11-02 23:16:10,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-02 23:16:10,128 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.106382978723404) internal successors, (198), 94 states have internal predecessors, (198), 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 204 [2021-11-02 23:16:10,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:16:10,129 INFO L225 Difference]: With dead ends: 320 [2021-11-02 23:16:10,129 INFO L226 Difference]: Without dead ends: 208 [2021-11-02 23:16:10,130 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3336, Invalid=5406, Unknown=0, NotChecked=0, Total=8742 [2021-11-02 23:16:10,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-11-02 23:16:10,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 207. [2021-11-02 23:16:10,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.0145631067961165) internal successors, (209), 206 states have internal predecessors, (209), 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) [2021-11-02 23:16:10,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 209 transitions. [2021-11-02 23:16:10,147 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 209 transitions. Word has length 204 [2021-11-02 23:16:10,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:16:10,148 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 209 transitions. [2021-11-02 23:16:10,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.106382978723404) internal successors, (198), 94 states have internal predecessors, (198), 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) [2021-11-02 23:16:10,148 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 209 transitions. [2021-11-02 23:16:10,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-11-02 23:16:10,150 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:16:10,150 INFO L513 BasicCegarLoop]: trace histogram [46, 46, 23, 23, 23, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:16:10,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-11-02 23:16:10,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-11-02 23:16:10,378 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:16:10,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:16:10,379 INFO L85 PathProgramCache]: Analyzing trace with hash 777480092, now seen corresponding path program 39 times [2021-11-02 23:16:10,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:16:10,379 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312564043] [2021-11-02 23:16:10,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:16:10,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:16:10,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:16:11,871 INFO L134 CoverageAnalysis]: Checked inductivity of 3024 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 908 trivial. 0 not checked. [2021-11-02 23:16:11,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:16:11,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312564043] [2021-11-02 23:16:11,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312564043] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:16:11,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911294048] [2021-11-02 23:16:11,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:16:11,872 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:16:11,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:16:11,874 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:16:11,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-02 23:16:15,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2021-11-02 23:16:15,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:16:15,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-02 23:16:15,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:16:16,065 INFO L134 CoverageAnalysis]: Checked inductivity of 3024 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 2242 trivial. 0 not checked. [2021-11-02 23:16:16,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911294048] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:16:16,065 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:16:16,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 26] total 73 [2021-11-02 23:16:16,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712465089] [2021-11-02 23:16:16,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-11-02 23:16:16,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:16:16,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-11-02 23:16:16,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1500, Invalid=3756, Unknown=0, NotChecked=0, Total=5256 [2021-11-02 23:16:16,068 INFO L87 Difference]: Start difference. First operand 207 states and 209 transitions. Second operand has 73 states, 73 states have (on average 2.506849315068493) internal successors, (183), 73 states have internal predecessors, (183), 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) [2021-11-02 23:16:16,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:16:16,435 INFO L93 Difference]: Finished difference Result 448 states and 453 transitions. [2021-11-02 23:16:16,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-11-02 23:16:16,435 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.506849315068493) internal successors, (183), 73 states have internal predecessors, (183), 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 206 [2021-11-02 23:16:16,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:16:16,437 INFO L225 Difference]: With dead ends: 448 [2021-11-02 23:16:16,437 INFO L226 Difference]: Without dead ends: 336 [2021-11-02 23:16:16,438 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1500, Invalid=3756, Unknown=0, NotChecked=0, Total=5256 [2021-11-02 23:16:16,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-11-02 23:16:16,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 212. [2021-11-02 23:16:16,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 1.014218009478673) internal successors, (214), 211 states have internal predecessors, (214), 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) [2021-11-02 23:16:16,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 214 transitions. [2021-11-02 23:16:16,452 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 214 transitions. Word has length 206 [2021-11-02 23:16:16,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:16:16,453 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 214 transitions. [2021-11-02 23:16:16,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.506849315068493) internal successors, (183), 73 states have internal predecessors, (183), 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) [2021-11-02 23:16:16,453 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 214 transitions. [2021-11-02 23:16:16,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2021-11-02 23:16:16,455 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:16:16,455 INFO L513 BasicCegarLoop]: trace histogram [47, 47, 24, 24, 24, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:16:16,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-11-02 23:16:16,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:16:16,667 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:16:16,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:16:16,668 INFO L85 PathProgramCache]: Analyzing trace with hash -26444698, now seen corresponding path program 40 times [2021-11-02 23:16:16,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:16:16,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950543256] [2021-11-02 23:16:16,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:16:16,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:16:16,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:16:18,043 INFO L134 CoverageAnalysis]: Checked inductivity of 3187 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 978 trivial. 0 not checked. [2021-11-02 23:16:18,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:16:18,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950543256] [2021-11-02 23:16:18,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950543256] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:16:18,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814885017] [2021-11-02 23:16:18,044 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:16:18,044 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:16:18,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:16:18,045 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:16:18,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-11-02 23:16:19,858 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:16:19,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:16:19,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 608 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-02 23:16:19,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:16:20,920 INFO L134 CoverageAnalysis]: Checked inductivity of 3187 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 2335 trivial. 0 not checked. [2021-11-02 23:16:20,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814885017] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:16:20,921 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:16:20,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 27] total 75 [2021-11-02 23:16:20,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121483746] [2021-11-02 23:16:20,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-11-02 23:16:20,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:16:20,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-11-02 23:16:20,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1575, Invalid=3975, Unknown=0, NotChecked=0, Total=5550 [2021-11-02 23:16:20,924 INFO L87 Difference]: Start difference. First operand 212 states and 214 transitions. Second operand has 75 states, 75 states have (on average 2.506666666666667) internal successors, (188), 75 states have internal predecessors, (188), 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) [2021-11-02 23:16:21,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:16:21,319 INFO L93 Difference]: Finished difference Result 463 states and 468 transitions. [2021-11-02 23:16:21,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-11-02 23:16:21,320 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.506666666666667) internal successors, (188), 75 states have internal predecessors, (188), 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 211 [2021-11-02 23:16:21,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:16:21,322 INFO L225 Difference]: With dead ends: 463 [2021-11-02 23:16:21,322 INFO L226 Difference]: Without dead ends: 348 [2021-11-02 23:16:21,323 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1575, Invalid=3975, Unknown=0, NotChecked=0, Total=5550 [2021-11-02 23:16:21,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-11-02 23:16:21,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 217. [2021-11-02 23:16:21,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 1.0138888888888888) internal successors, (219), 216 states have internal predecessors, (219), 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) [2021-11-02 23:16:21,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 219 transitions. [2021-11-02 23:16:21,338 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 219 transitions. Word has length 211 [2021-11-02 23:16:21,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:16:21,338 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 219 transitions. [2021-11-02 23:16:21,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.506666666666667) internal successors, (188), 75 states have internal predecessors, (188), 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) [2021-11-02 23:16:21,338 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 219 transitions. [2021-11-02 23:16:21,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-11-02 23:16:21,339 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:16:21,340 INFO L513 BasicCegarLoop]: trace histogram [48, 48, 25, 25, 25, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:16:21,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-11-02 23:16:21,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-11-02 23:16:21,554 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:16:21,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:16:21,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1995828320, now seen corresponding path program 41 times [2021-11-02 23:16:21,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:16:21,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696335693] [2021-11-02 23:16:21,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:16:21,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:16:21,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:16:23,059 INFO L134 CoverageAnalysis]: Checked inductivity of 3355 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 1051 trivial. 0 not checked. [2021-11-02 23:16:23,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:16:23,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696335693] [2021-11-02 23:16:23,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696335693] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:16:23,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432309701] [2021-11-02 23:16:23,060 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:16:23,060 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:16:23,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:16:23,061 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:16:23,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-11-02 23:16:57,251 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2021-11-02 23:16:57,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:16:57,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 621 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-02 23:16:57,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:16:58,562 INFO L134 CoverageAnalysis]: Checked inductivity of 3355 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 2430 trivial. 0 not checked. [2021-11-02 23:16:58,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432309701] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:16:58,563 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:16:58,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 28] total 77 [2021-11-02 23:16:58,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069358101] [2021-11-02 23:16:58,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-11-02 23:16:58,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:16:58,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-11-02 23:16:58,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1652, Invalid=4200, Unknown=0, NotChecked=0, Total=5852 [2021-11-02 23:16:58,566 INFO L87 Difference]: Start difference. First operand 217 states and 219 transitions. Second operand has 77 states, 77 states have (on average 2.5064935064935066) internal successors, (193), 77 states have internal predecessors, (193), 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) [2021-11-02 23:16:59,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:16:59,059 INFO L93 Difference]: Finished difference Result 478 states and 483 transitions. [2021-11-02 23:16:59,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-11-02 23:16:59,060 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.5064935064935066) internal successors, (193), 77 states have internal predecessors, (193), 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 216 [2021-11-02 23:16:59,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:16:59,062 INFO L225 Difference]: With dead ends: 478 [2021-11-02 23:16:59,062 INFO L226 Difference]: Without dead ends: 360 [2021-11-02 23:16:59,063 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1248 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1652, Invalid=4200, Unknown=0, NotChecked=0, Total=5852 [2021-11-02 23:16:59,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-11-02 23:16:59,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 222. [2021-11-02 23:16:59,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 1.0135746606334841) internal successors, (224), 221 states have internal predecessors, (224), 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) [2021-11-02 23:16:59,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 224 transitions. [2021-11-02 23:16:59,079 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 224 transitions. Word has length 216 [2021-11-02 23:16:59,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:16:59,080 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 224 transitions. [2021-11-02 23:16:59,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.5064935064935066) internal successors, (193), 77 states have internal predecessors, (193), 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) [2021-11-02 23:16:59,080 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 224 transitions. [2021-11-02 23:16:59,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-11-02 23:16:59,082 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:16:59,082 INFO L513 BasicCegarLoop]: trace histogram [49, 49, 26, 26, 26, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:16:59,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-11-02 23:16:59,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:16:59,306 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:16:59,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:16:59,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1098077086, now seen corresponding path program 42 times [2021-11-02 23:16:59,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:16:59,307 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437753496] [2021-11-02 23:16:59,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:16:59,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:16:59,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:17:00,619 INFO L134 CoverageAnalysis]: Checked inductivity of 3528 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 1127 trivial. 0 not checked. [2021-11-02 23:17:00,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:17:00,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437753496] [2021-11-02 23:17:00,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437753496] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:00,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756647551] [2021-11-02 23:17:00,620 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:17:00,620 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:00,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:17:00,621 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:17:00,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-11-02 23:17:41,884 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 47 check-sat command(s) [2021-11-02 23:17:41,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:17:41,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-02 23:17:41,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:17:43,188 INFO L134 CoverageAnalysis]: Checked inductivity of 3528 backedges. 0 proven. 632 refuted. 0 times theorem prover too weak. 2896 trivial. 0 not checked. [2021-11-02 23:17:43,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756647551] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:43,189 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:17:43,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 21] total 71 [2021-11-02 23:17:43,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968850411] [2021-11-02 23:17:43,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-11-02 23:17:43,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:17:43,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-11-02 23:17:43,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=3590, Unknown=0, NotChecked=0, Total=4970 [2021-11-02 23:17:43,192 INFO L87 Difference]: Start difference. First operand 222 states and 224 transitions. Second operand has 71 states, 71 states have (on average 2.6056338028169015) internal successors, (185), 71 states have internal predecessors, (185), 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) [2021-11-02 23:17:43,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:17:43,738 INFO L93 Difference]: Finished difference Result 355 states and 360 transitions. [2021-11-02 23:17:43,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-11-02 23:17:43,738 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.6056338028169015) internal successors, (185), 71 states have internal predecessors, (185), 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 221 [2021-11-02 23:17:43,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:17:43,739 INFO L225 Difference]: With dead ends: 355 [2021-11-02 23:17:43,739 INFO L226 Difference]: Without dead ends: 234 [2021-11-02 23:17:43,740 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 993 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1395, Invalid=4007, Unknown=0, NotChecked=0, Total=5402 [2021-11-02 23:17:43,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-11-02 23:17:43,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 229. [2021-11-02 23:17:43,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 1.013157894736842) internal successors, (231), 228 states have internal predecessors, (231), 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) [2021-11-02 23:17:43,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 231 transitions. [2021-11-02 23:17:43,752 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 231 transitions. Word has length 221 [2021-11-02 23:17:43,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:17:43,753 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 231 transitions. [2021-11-02 23:17:43,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.6056338028169015) internal successors, (185), 71 states have internal predecessors, (185), 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) [2021-11-02 23:17:43,753 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 231 transitions. [2021-11-02 23:17:43,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-11-02 23:17:43,755 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:17:43,755 INFO L513 BasicCegarLoop]: trace histogram [50, 50, 26, 26, 26, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:17:43,807 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-11-02 23:17:43,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:43,970 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:17:43,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:17:43,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1918940735, now seen corresponding path program 43 times [2021-11-02 23:17:43,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:17:43,971 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200609773] [2021-11-02 23:17:43,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:17:43,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:17:44,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:17:45,277 INFO L134 CoverageAnalysis]: Checked inductivity of 3665 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 1165 trivial. 0 not checked. [2021-11-02 23:17:45,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:17:45,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200609773] [2021-11-02 23:17:45,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200609773] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:45,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503475080] [2021-11-02 23:17:45,278 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:17:45,278 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:45,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:17:45,280 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:17:45,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-11-02 23:17:47,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:17:47,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-02 23:17:47,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:17:50,583 INFO L134 CoverageAnalysis]: Checked inductivity of 3665 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 1165 trivial. 0 not checked. [2021-11-02 23:17:50,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503475080] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:50,584 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:17:50,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 104 [2021-11-02 23:17:50,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519600668] [2021-11-02 23:17:50,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2021-11-02 23:17:50,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:17:50,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2021-11-02 23:17:50,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4081, Invalid=6631, Unknown=0, NotChecked=0, Total=10712 [2021-11-02 23:17:50,586 INFO L87 Difference]: Start difference. First operand 229 states and 231 transitions. Second operand has 104 states, 104 states have (on average 2.0961538461538463) internal successors, (218), 104 states have internal predecessors, (218), 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) [2021-11-02 23:17:50,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:17:50,741 INFO L93 Difference]: Finished difference Result 358 states and 362 transitions. [2021-11-02 23:17:50,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-02 23:17:50,741 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.0961538461538463) internal successors, (218), 104 states have internal predecessors, (218), 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 228 [2021-11-02 23:17:50,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:17:50,743 INFO L225 Difference]: With dead ends: 358 [2021-11-02 23:17:50,743 INFO L226 Difference]: Without dead ends: 232 [2021-11-02 23:17:50,743 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4081, Invalid=6631, Unknown=0, NotChecked=0, Total=10712 [2021-11-02 23:17:50,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-11-02 23:17:50,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 231. [2021-11-02 23:17:50,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 1.0130434782608695) internal successors, (233), 230 states have internal predecessors, (233), 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) [2021-11-02 23:17:50,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 233 transitions. [2021-11-02 23:17:50,761 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 233 transitions. Word has length 228 [2021-11-02 23:17:50,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:17:50,761 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 233 transitions. [2021-11-02 23:17:50,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.0961538461538463) internal successors, (218), 104 states have internal predecessors, (218), 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) [2021-11-02 23:17:50,762 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 233 transitions. [2021-11-02 23:17:50,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2021-11-02 23:17:50,763 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:17:50,764 INFO L513 BasicCegarLoop]: trace histogram [51, 51, 26, 26, 26, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:17:50,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-11-02 23:17:50,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-11-02 23:17:50,978 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:17:50,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:17:50,979 INFO L85 PathProgramCache]: Analyzing trace with hash 2006226371, now seen corresponding path program 44 times [2021-11-02 23:17:50,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:17:50,979 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107441349] [2021-11-02 23:17:50,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:17:50,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:17:51,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:17:52,597 INFO L134 CoverageAnalysis]: Checked inductivity of 3766 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 1165 trivial. 0 not checked. [2021-11-02 23:17:52,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:17:52,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107441349] [2021-11-02 23:17:52,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107441349] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:52,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260960340] [2021-11-02 23:17:52,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:17:52,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:52,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:17:52,600 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:17:52,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-11-02 23:17:54,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:17:54,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:17:54,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-02 23:17:54,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:17:58,067 INFO L134 CoverageAnalysis]: Checked inductivity of 3766 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 1165 trivial. 0 not checked. [2021-11-02 23:17:58,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260960340] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:58,067 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:17:58,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 106 [2021-11-02 23:17:58,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524127785] [2021-11-02 23:17:58,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2021-11-02 23:17:58,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:17:58,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2021-11-02 23:17:58,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4239, Invalid=6891, Unknown=0, NotChecked=0, Total=11130 [2021-11-02 23:17:58,070 INFO L87 Difference]: Start difference. First operand 231 states and 233 transitions. Second operand has 106 states, 106 states have (on average 2.0943396226415096) internal successors, (222), 106 states have internal predecessors, (222), 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) [2021-11-02 23:17:58,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:17:58,252 INFO L93 Difference]: Finished difference Result 360 states and 364 transitions. [2021-11-02 23:17:58,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-02 23:17:58,266 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.0943396226415096) internal successors, (222), 106 states have internal predecessors, (222), 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 230 [2021-11-02 23:17:58,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:17:58,268 INFO L225 Difference]: With dead ends: 360 [2021-11-02 23:17:58,268 INFO L226 Difference]: Without dead ends: 234 [2021-11-02 23:17:58,270 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1275 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=4239, Invalid=6891, Unknown=0, NotChecked=0, Total=11130 [2021-11-02 23:17:58,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-11-02 23:17:58,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 233. [2021-11-02 23:17:58,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 1.0129310344827587) internal successors, (235), 232 states have internal predecessors, (235), 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) [2021-11-02 23:17:58,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 235 transitions. [2021-11-02 23:17:58,286 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 235 transitions. Word has length 230 [2021-11-02 23:17:58,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:17:58,287 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 235 transitions. [2021-11-02 23:17:58,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 2.0943396226415096) internal successors, (222), 106 states have internal predecessors, (222), 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) [2021-11-02 23:17:58,287 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 235 transitions. [2021-11-02 23:17:58,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2021-11-02 23:17:58,289 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:17:58,289 INFO L513 BasicCegarLoop]: trace histogram [52, 52, 26, 26, 26, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:17:58,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-11-02 23:17:58,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:58,514 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:17:58,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:17:58,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1184437947, now seen corresponding path program 45 times [2021-11-02 23:17:58,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:17:58,515 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460172732] [2021-11-02 23:17:58,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:17:58,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:17:58,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:00,083 INFO L134 CoverageAnalysis]: Checked inductivity of 3869 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 1165 trivial. 0 not checked. [2021-11-02 23:18:00,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:00,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460172732] [2021-11-02 23:18:00,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460172732] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:00,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791918626] [2021-11-02 23:18:00,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:18:00,084 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:00,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:00,084 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:00,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-11-02 23:18:03,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2021-11-02 23:18:03,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:18:03,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-02 23:18:03,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:05,211 INFO L134 CoverageAnalysis]: Checked inductivity of 3869 backedges. 103 proven. 1001 refuted. 0 times theorem prover too weak. 2765 trivial. 0 not checked. [2021-11-02 23:18:05,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791918626] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:05,211 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:18:05,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 32] total 85 [2021-11-02 23:18:05,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024615068] [2021-11-02 23:18:05,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2021-11-02 23:18:05,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:05,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-11-02 23:18:05,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2058, Invalid=5082, Unknown=0, NotChecked=0, Total=7140 [2021-11-02 23:18:05,213 INFO L87 Difference]: Start difference. First operand 233 states and 235 transitions. Second operand has 85 states, 85 states have (on average 2.4235294117647057) internal successors, (206), 85 states have internal predecessors, (206), 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) [2021-11-02 23:18:06,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:06,649 INFO L93 Difference]: Finished difference Result 503 states and 509 transitions. [2021-11-02 23:18:06,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-11-02 23:18:06,650 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.4235294117647057) internal successors, (206), 85 states have internal predecessors, (206), 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 232 [2021-11-02 23:18:06,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:06,652 INFO L225 Difference]: With dead ends: 503 [2021-11-02 23:18:06,652 INFO L226 Difference]: Without dead ends: 377 [2021-11-02 23:18:06,653 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1890 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2895, Invalid=9537, Unknown=0, NotChecked=0, Total=12432 [2021-11-02 23:18:06,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-11-02 23:18:06,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 240. [2021-11-02 23:18:06,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 1.0125523012552302) internal successors, (242), 239 states have internal predecessors, (242), 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) [2021-11-02 23:18:06,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 242 transitions. [2021-11-02 23:18:06,671 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 242 transitions. Word has length 232 [2021-11-02 23:18:06,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:06,671 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 242 transitions. [2021-11-02 23:18:06,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.4235294117647057) internal successors, (206), 85 states have internal predecessors, (206), 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) [2021-11-02 23:18:06,671 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 242 transitions. [2021-11-02 23:18:06,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2021-11-02 23:18:06,673 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:06,673 INFO L513 BasicCegarLoop]: trace histogram [54, 54, 27, 27, 27, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:06,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-11-02 23:18:06,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-11-02 23:18:06,894 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:06,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:06,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1143154379, now seen corresponding path program 46 times [2021-11-02 23:18:06,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:06,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736505833] [2021-11-02 23:18:06,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:06,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:06,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:08,487 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 1244 trivial. 0 not checked. [2021-11-02 23:18:08,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:08,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736505833] [2021-11-02 23:18:08,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736505833] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:08,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331178097] [2021-11-02 23:18:08,488 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:18:08,488 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:08,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:08,488 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:08,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-11-02 23:18:10,758 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:18:10,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:18:10,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 684 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-02 23:18:10,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:12,094 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 1080 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked. [2021-11-02 23:18:12,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331178097] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:12,094 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:18:12,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 30] total 85 [2021-11-02 23:18:12,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024397344] [2021-11-02 23:18:12,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2021-11-02 23:18:12,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:12,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-11-02 23:18:12,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2030, Invalid=5110, Unknown=0, NotChecked=0, Total=7140 [2021-11-02 23:18:12,096 INFO L87 Difference]: Start difference. First operand 240 states and 242 transitions. Second operand has 85 states, 85 states have (on average 2.4823529411764707) internal successors, (211), 85 states have internal predecessors, (211), 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) [2021-11-02 23:18:12,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:12,479 INFO L93 Difference]: Finished difference Result 519 states and 524 transitions. [2021-11-02 23:18:12,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-11-02 23:18:12,479 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.4823529411764707) internal successors, (211), 85 states have internal predecessors, (211), 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 239 [2021-11-02 23:18:12,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:12,481 INFO L225 Difference]: With dead ends: 519 [2021-11-02 23:18:12,481 INFO L226 Difference]: Without dead ends: 390 [2021-11-02 23:18:12,482 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1512 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2030, Invalid=5110, Unknown=0, NotChecked=0, Total=7140 [2021-11-02 23:18:12,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-11-02 23:18:12,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 245. [2021-11-02 23:18:12,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 1.0122950819672132) internal successors, (247), 244 states have internal predecessors, (247), 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) [2021-11-02 23:18:12,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 247 transitions. [2021-11-02 23:18:12,494 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 247 transitions. Word has length 239 [2021-11-02 23:18:12,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:12,494 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 247 transitions. [2021-11-02 23:18:12,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.4823529411764707) internal successors, (211), 85 states have internal predecessors, (211), 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) [2021-11-02 23:18:12,494 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 247 transitions. [2021-11-02 23:18:12,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-11-02 23:18:12,495 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:12,495 INFO L513 BasicCegarLoop]: trace histogram [55, 55, 28, 28, 28, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:12,523 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-11-02 23:18:12,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-11-02 23:18:12,696 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:12,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:12,696 INFO L85 PathProgramCache]: Analyzing trace with hash 92151755, now seen corresponding path program 47 times [2021-11-02 23:18:12,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:12,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539406430] [2021-11-02 23:18:12,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:12,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:12,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:14,240 INFO L134 CoverageAnalysis]: Checked inductivity of 4351 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 1326 trivial. 0 not checked. [2021-11-02 23:18:14,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:14,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539406430] [2021-11-02 23:18:14,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539406430] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:14,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287361829] [2021-11-02 23:18:14,241 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:18:14,241 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:14,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:14,242 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:14,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-11-02 23:24:57,060 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 56 check-sat command(s) [2021-11-02 23:24:57,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:24:57,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 697 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-02 23:24:57,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:24:58,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4351 backedges. 0 proven. 1162 refuted. 0 times theorem prover too weak. 3189 trivial. 0 not checked. [2021-11-02 23:24:58,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287361829] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:24:58,739 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:24:58,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 31] total 87 [2021-11-02 23:24:58,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455454030] [2021-11-02 23:24:58,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2021-11-02 23:24:58,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:24:58,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-11-02 23:24:58,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2117, Invalid=5365, Unknown=0, NotChecked=0, Total=7482 [2021-11-02 23:24:58,741 INFO L87 Difference]: Start difference. First operand 245 states and 247 transitions. Second operand has 87 states, 87 states have (on average 2.4827586206896552) internal successors, (216), 87 states have internal predecessors, (216), 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) [2021-11-02 23:24:59,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:24:59,240 INFO L93 Difference]: Finished difference Result 534 states and 539 transitions. [2021-11-02 23:24:59,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-11-02 23:24:59,241 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.4827586206896552) internal successors, (216), 87 states have internal predecessors, (216), 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 244 [2021-11-02 23:24:59,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:24:59,243 INFO L225 Difference]: With dead ends: 534 [2021-11-02 23:24:59,243 INFO L226 Difference]: Without dead ends: 402 [2021-11-02 23:24:59,244 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2117, Invalid=5365, Unknown=0, NotChecked=0, Total=7482 [2021-11-02 23:24:59,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-11-02 23:24:59,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 250. [2021-11-02 23:24:59,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 1.0120481927710843) internal successors, (252), 249 states have internal predecessors, (252), 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) [2021-11-02 23:24:59,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 252 transitions. [2021-11-02 23:24:59,266 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 252 transitions. Word has length 244 [2021-11-02 23:24:59,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:24:59,266 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 252 transitions. [2021-11-02 23:24:59,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.4827586206896552) internal successors, (216), 87 states have internal predecessors, (216), 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) [2021-11-02 23:24:59,267 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 252 transitions. [2021-11-02 23:24:59,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2021-11-02 23:24:59,269 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:24:59,269 INFO L513 BasicCegarLoop]: trace histogram [56, 56, 29, 29, 29, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:24:59,329 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2021-11-02 23:24:59,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:24:59,479 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:24:59,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:24:59,480 INFO L85 PathProgramCache]: Analyzing trace with hash 917440945, now seen corresponding path program 48 times [2021-11-02 23:24:59,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:24:59,480 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982369241] [2021-11-02 23:24:59,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:24:59,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:24:59,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:25:01,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4547 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 1411 trivial. 0 not checked. [2021-11-02 23:25:01,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:25:01,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982369241] [2021-11-02 23:25:01,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982369241] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:25:01,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037581890] [2021-11-02 23:25:01,460 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:25:01,460 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:25:01,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:25:01,461 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:25:01,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb02b605-e770-4ab8-ae3e-4c9d45226469/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process