./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/sorting_bubblesort_ground-1.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_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/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_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/sorting_bubblesort_ground-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/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_77834372-4454-422e-933a-87535b072571/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 68585835b92043bfb2f3c62590e96ff685993869f8a251aecd9fe4c8aaea0e1e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 23:18:46,457 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 23:18:46,460 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 23:18:46,514 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 23:18:46,515 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 23:18:46,519 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 23:18:46,521 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 23:18:46,525 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 23:18:46,528 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 23:18:46,536 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 23:18:46,537 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 23:18:46,539 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 23:18:46,540 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 23:18:46,543 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 23:18:46,544 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 23:18:46,546 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 23:18:46,547 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 23:18:46,548 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 23:18:46,550 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 23:18:46,552 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 23:18:46,555 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 23:18:46,556 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 23:18:46,558 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 23:18:46,559 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 23:18:46,563 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 23:18:46,563 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 23:18:46,564 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 23:18:46,565 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 23:18:46,565 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 23:18:46,567 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 23:18:46,567 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 23:18:46,568 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 23:18:46,569 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 23:18:46,570 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 23:18:46,571 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 23:18:46,572 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 23:18:46,573 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 23:18:46,573 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 23:18:46,574 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 23:18:46,575 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 23:18:46,576 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 23:18:46,577 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-02 23:18:46,623 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 23:18:46,624 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 23:18:46,625 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 23:18:46,625 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 23:18:46,632 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 23:18:46,633 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 23:18:46,633 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 23:18:46,633 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 23:18:46,633 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 23:18:46,634 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 23:18:46,635 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 23:18:46,635 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 23:18:46,635 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 23:18:46,636 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 23:18:46,636 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 23:18:46,636 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 23:18:46,636 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 23:18:46,636 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 23:18:46,637 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 23:18:46,637 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 23:18:46,637 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 23:18:46,637 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 23:18:46,638 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 23:18:46,638 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 23:18:46,638 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 23:18:46,638 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 23:18:46,639 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 23:18:46,639 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 23:18:46,639 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 23:18:46,641 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 23:18:46,641 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 23:18:46,641 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 23:18:46,642 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_77834372-4454-422e-933a-87535b072571/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 68585835b92043bfb2f3c62590e96ff685993869f8a251aecd9fe4c8aaea0e1e [2021-11-02 23:18:46,934 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 23:18:46,969 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 23:18:46,971 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 23:18:46,973 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 23:18:46,974 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 23:18:46,975 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/array-examples/sorting_bubblesort_ground-1.i [2021-11-02 23:18:47,068 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/data/66eb6f0f6/fe9dfa2f70b34cc6890a80d3b15467ca/FLAGc1562e434 [2021-11-02 23:18:47,535 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 23:18:47,535 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/sv-benchmarks/c/array-examples/sorting_bubblesort_ground-1.i [2021-11-02 23:18:47,554 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/data/66eb6f0f6/fe9dfa2f70b34cc6890a80d3b15467ca/FLAGc1562e434 [2021-11-02 23:18:47,907 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/data/66eb6f0f6/fe9dfa2f70b34cc6890a80d3b15467ca [2021-11-02 23:18:47,909 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 23:18:47,911 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 23:18:47,913 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 23:18:47,913 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 23:18:47,916 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 23:18:47,917 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:18:47" (1/1) ... [2021-11-02 23:18:47,918 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43c0c909 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:18:47, skipping insertion in model container [2021-11-02 23:18:47,918 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:18:47" (1/1) ... [2021-11-02 23:18:47,927 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 23:18:47,946 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 23:18:48,136 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_77834372-4454-422e-933a-87535b072571/sv-benchmarks/c/array-examples/sorting_bubblesort_ground-1.i[820,833] [2021-11-02 23:18:48,160 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 23:18:48,166 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 23:18:48,177 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_77834372-4454-422e-933a-87535b072571/sv-benchmarks/c/array-examples/sorting_bubblesort_ground-1.i[820,833] [2021-11-02 23:18:48,186 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 23:18:48,199 INFO L208 MainTranslator]: Completed translation [2021-11-02 23:18:48,199 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:18:48 WrapperNode [2021-11-02 23:18:48,200 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 23:18:48,201 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 23:18:48,201 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 23:18:48,201 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 23:18:48,209 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:18:48" (1/1) ... [2021-11-02 23:18:48,215 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:18:48" (1/1) ... [2021-11-02 23:18:48,235 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 23:18:48,236 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 23:18:48,236 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 23:18:48,237 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 23:18:48,245 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:18:48" (1/1) ... [2021-11-02 23:18:48,245 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:18:48" (1/1) ... [2021-11-02 23:18:48,247 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:18:48" (1/1) ... [2021-11-02 23:18:48,248 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:18:48" (1/1) ... [2021-11-02 23:18:48,253 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:18:48" (1/1) ... [2021-11-02 23:18:48,257 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:18:48" (1/1) ... [2021-11-02 23:18:48,259 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:18:48" (1/1) ... [2021-11-02 23:18:48,261 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 23:18:48,262 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 23:18:48,262 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 23:18:48,262 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 23:18:48,263 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:18:48" (1/1) ... [2021-11-02 23:18:48,270 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 23:18:48,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:48,295 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 23:18:48,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 23:18:48,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 23:18:48,362 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 23:18:48,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-02 23:18:48,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 23:18:48,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 23:18:48,363 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-02 23:18:48,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-02 23:18:48,594 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 23:18:48,594 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-11-02 23:18:48,596 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:18:48 BoogieIcfgContainer [2021-11-02 23:18:48,596 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 23:18:48,598 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 23:18:48,598 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 23:18:48,601 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 23:18:48,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 11:18:47" (1/3) ... [2021-11-02 23:18:48,602 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ddb4fe5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:18:48, skipping insertion in model container [2021-11-02 23:18:48,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:18:48" (2/3) ... [2021-11-02 23:18:48,603 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ddb4fe5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:18:48, skipping insertion in model container [2021-11-02 23:18:48,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:18:48" (3/3) ... [2021-11-02 23:18:48,604 INFO L111 eAbstractionObserver]: Analyzing ICFG sorting_bubblesort_ground-1.i [2021-11-02 23:18:48,609 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 23:18:48,610 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-02 23:18:48,706 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 23:18:48,713 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 23:18:48,713 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-02 23:18:48,763 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.65) internal successors, (33), 21 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 23:18:48,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-02 23:18:48,769 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:48,770 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:48,771 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:48,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:48,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1960376238, now seen corresponding path program 1 times [2021-11-02 23:18:48,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:48,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703884542] [2021-11-02 23:18:48,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:48,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:48,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:48,998 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 23:18:49,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:49,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703884542] [2021-11-02 23:18:49,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703884542] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:18:49,002 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:18:49,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:18:49,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010857502] [2021-11-02 23:18:49,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:18:49,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:49,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:18:49,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:18:49,038 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.65) internal successors, (33), 21 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) 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 23:18:49,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:49,086 INFO L93 Difference]: Finished difference Result 42 states and 64 transitions. [2021-11-02 23:18:49,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:18:49,089 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 23:18:49,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:49,098 INFO L225 Difference]: With dead ends: 42 [2021-11-02 23:18:49,098 INFO L226 Difference]: Without dead ends: 20 [2021-11-02 23:18:49,101 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 23:18:49,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-02 23:18:49,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2021-11-02 23:18:49,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 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 23:18:49,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2021-11-02 23:18:49,139 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2021-11-02 23:18:49,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:49,139 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2021-11-02 23:18:49,141 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 23:18:49,142 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2021-11-02 23:18:49,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-02 23:18:49,143 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:49,143 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:49,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 23:18:49,145 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:49,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:49,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1305178672, now seen corresponding path program 1 times [2021-11-02 23:18:49,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:49,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009054273] [2021-11-02 23:18:49,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:49,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:49,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:49,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:18:49,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:49,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009054273] [2021-11-02 23:18:49,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009054273] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:49,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28117109] [2021-11-02 23:18:49,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:49,240 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:49,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:49,243 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:49,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 23:18:49,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:49,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-02 23:18:49,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:49,399 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 23:18:49,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28117109] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:18:49,400 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:18:49,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-02 23:18:49,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610853939] [2021-11-02 23:18:49,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:18:49,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:49,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:18:49,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:18:49,416 INFO L87 Difference]: Start difference. First operand 19 states and 24 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 23:18:49,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:49,431 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2021-11-02 23:18:49,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:18:49,432 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 23:18:49,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:49,435 INFO L225 Difference]: With dead ends: 32 [2021-11-02 23:18:49,436 INFO L226 Difference]: Without dead ends: 23 [2021-11-02 23:18:49,437 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 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 23:18:49,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-02 23:18:49,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-11-02 23:18:49,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:49,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2021-11-02 23:18:49,447 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 12 [2021-11-02 23:18:49,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:49,448 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2021-11-02 23:18:49,448 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 23:18:49,449 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2021-11-02 23:18:49,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-02 23:18:49,453 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:49,453 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:49,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 23:18:49,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:49,670 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:49,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:49,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1356848343, now seen corresponding path program 1 times [2021-11-02 23:18:49,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:49,672 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464873152] [2021-11-02 23:18:49,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:49,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:49,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:49,710 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 23:18:49,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:49,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464873152] [2021-11-02 23:18:49,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464873152] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:49,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378679381] [2021-11-02 23:18:49,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:49,712 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:49,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:49,713 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:49,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 23:18:49,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:49,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-02 23:18:49,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:49,841 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 23:18:49,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378679381] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:18:49,842 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:18:49,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-02 23:18:49,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601081980] [2021-11-02 23:18:49,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:18:49,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:49,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:18:49,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:18:49,850 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:49,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:49,876 INFO L93 Difference]: Finished difference Result 44 states and 59 transitions. [2021-11-02 23:18:49,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:18:49,877 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-02 23:18:49,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:49,878 INFO L225 Difference]: With dead ends: 44 [2021-11-02 23:18:49,878 INFO L226 Difference]: Without dead ends: 27 [2021-11-02 23:18:49,879 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 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 23:18:49,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-02 23:18:49,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2021-11-02 23:18:49,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 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 23:18:49,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2021-11-02 23:18:49,891 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 14 [2021-11-02 23:18:49,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:49,892 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2021-11-02 23:18:49,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:49,892 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2021-11-02 23:18:49,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-02 23:18:49,895 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:49,895 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:49,937 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-02 23:18:50,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:50,114 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:50,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:50,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1942419029, now seen corresponding path program 1 times [2021-11-02 23:18:50,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:50,115 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550217116] [2021-11-02 23:18:50,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:50,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:50,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:50,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 23:18:50,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:50,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550217116] [2021-11-02 23:18:50,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550217116] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:50,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442507277] [2021-11-02 23:18:50,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:50,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:50,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:50,155 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:50,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-02 23:18:50,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:50,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 23:18:50,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:50,314 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 23:18:50,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442507277] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:50,314 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:18:50,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-11-02 23:18:50,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471795323] [2021-11-02 23:18:50,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 23:18:50,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:50,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 23:18:50,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:18:50,318 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:50,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:50,344 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2021-11-02 23:18:50,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:18:50,345 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-02 23:18:50,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:50,346 INFO L225 Difference]: With dead ends: 46 [2021-11-02 23:18:50,346 INFO L226 Difference]: Without dead ends: 27 [2021-11-02 23:18:50,347 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:18:50,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-02 23:18:50,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2021-11-02 23:18:50,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.32) internal successors, (33), 25 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 23:18:50,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2021-11-02 23:18:50,362 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 17 [2021-11-02 23:18:50,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:50,362 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2021-11-02 23:18:50,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:50,363 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2021-11-02 23:18:50,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-02 23:18:50,365 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:50,365 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:50,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-02 23:18:50,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:50,578 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:50,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:50,579 INFO L85 PathProgramCache]: Analyzing trace with hash 784472297, now seen corresponding path program 2 times [2021-11-02 23:18:50,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:50,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996570555] [2021-11-02 23:18:50,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:50,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:50,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:50,636 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 23:18:50,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:50,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996570555] [2021-11-02 23:18:50,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996570555] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:50,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595939305] [2021-11-02 23:18:50,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:18:50,638 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:50,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:50,650 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:50,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-02 23:18:50,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:18:50,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:18:50,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 23:18:50,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:50,809 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 23:18:50,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595939305] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:50,815 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:18:50,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-11-02 23:18:50,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531465287] [2021-11-02 23:18:50,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 23:18:50,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:50,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 23:18:50,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:18:50,824 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states 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 23:18:50,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:50,874 INFO L93 Difference]: Finished difference Result 57 states and 76 transitions. [2021-11-02 23:18:50,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 23:18:50,874 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 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 19 [2021-11-02 23:18:50,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:50,876 INFO L225 Difference]: With dead ends: 57 [2021-11-02 23:18:50,876 INFO L226 Difference]: Without dead ends: 38 [2021-11-02 23:18:50,877 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:18:50,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-02 23:18:50,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2021-11-02 23:18:50,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.28125) internal successors, (41), 32 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 23:18:50,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2021-11-02 23:18:50,891 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 19 [2021-11-02 23:18:50,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:50,892 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2021-11-02 23:18:50,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states 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 23:18:50,892 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2021-11-02 23:18:50,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-02 23:18:50,894 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:50,894 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:50,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-02 23:18:51,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:51,114 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:51,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:51,115 INFO L85 PathProgramCache]: Analyzing trace with hash -201702437, now seen corresponding path program 3 times [2021-11-02 23:18:51,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:51,115 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291928018] [2021-11-02 23:18:51,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:51,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:51,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:51,203 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-02 23:18:51,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:51,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291928018] [2021-11-02 23:18:51,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291928018] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:51,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823626362] [2021-11-02 23:18:51,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:18:51,205 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:51,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:51,211 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:51,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-02 23:18:51,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-02 23:18:51,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:18:51,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 23:18:51,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:51,377 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-02 23:18:51,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823626362] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:51,377 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:18:51,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-11-02 23:18:51,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793171449] [2021-11-02 23:18:51,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 23:18:51,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:51,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 23:18:51,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-02 23:18:51,379 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:51,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:51,442 INFO L93 Difference]: Finished difference Result 70 states and 92 transitions. [2021-11-02 23:18:51,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 23:18:51,443 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-02 23:18:51,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:51,444 INFO L225 Difference]: With dead ends: 70 [2021-11-02 23:18:51,444 INFO L226 Difference]: Without dead ends: 46 [2021-11-02 23:18:51,444 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-02 23:18:51,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-02 23:18:51,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2021-11-02 23:18:51,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.275) internal successors, (51), 40 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 23:18:51,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2021-11-02 23:18:51,457 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 24 [2021-11-02 23:18:51,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:51,458 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2021-11-02 23:18:51,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:51,458 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2021-11-02 23:18:51,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-02 23:18:51,460 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:51,460 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:51,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-02 23:18:51,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:51,686 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:51,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:51,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1255714277, now seen corresponding path program 4 times [2021-11-02 23:18:51,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:51,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989518786] [2021-11-02 23:18:51,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:51,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:51,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:51,785 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-02 23:18:51,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:51,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989518786] [2021-11-02 23:18:51,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989518786] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:51,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409502304] [2021-11-02 23:18:51,786 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:18:51,786 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:51,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:51,787 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:51,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-02 23:18:51,859 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:18:51,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:18:51,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-02 23:18:51,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:51,935 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-02 23:18:51,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409502304] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:51,936 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:18:51,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-11-02 23:18:51,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433172298] [2021-11-02 23:18:51,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 23:18:51,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:51,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 23:18:51,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-02 23:18:51,938 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 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 23:18:51,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:51,958 INFO L93 Difference]: Finished difference Result 74 states and 94 transitions. [2021-11-02 23:18:51,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 23:18:51,958 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-02 23:18:51,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:51,959 INFO L225 Difference]: With dead ends: 74 [2021-11-02 23:18:51,959 INFO L226 Difference]: Without dead ends: 44 [2021-11-02 23:18:51,960 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-02 23:18:51,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-02 23:18:51,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2021-11-02 23:18:51,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 42 states have internal predecessors, (53), 0 states have call successors, (0), 0 states 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 23:18:51,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2021-11-02 23:18:51,964 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 29 [2021-11-02 23:18:51,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:51,964 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2021-11-02 23:18:51,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 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 23:18:51,965 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2021-11-02 23:18:51,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-02 23:18:51,966 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:51,966 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:52,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-02 23:18:52,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-02 23:18:52,190 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:52,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:52,191 INFO L85 PathProgramCache]: Analyzing trace with hash -654389213, now seen corresponding path program 5 times [2021-11-02 23:18:52,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:52,191 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573136495] [2021-11-02 23:18:52,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:52,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:52,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:52,299 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-02 23:18:52,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:52,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573136495] [2021-11-02 23:18:52,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573136495] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:52,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308753868] [2021-11-02 23:18:52,302 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:18:52,302 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:52,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:52,306 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:52,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-02 23:18:52,387 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-02 23:18:52,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:18:52,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 23:18:52,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:52,504 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-02 23:18:52,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308753868] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:52,505 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:18:52,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2021-11-02 23:18:52,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740773967] [2021-11-02 23:18:52,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-02 23:18:52,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:52,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-02 23:18:52,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-02 23:18:52,507 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 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 23:18:52,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:52,579 INFO L93 Difference]: Finished difference Result 86 states and 112 transitions. [2021-11-02 23:18:52,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-02 23:18:52,580 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 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 31 [2021-11-02 23:18:52,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:52,581 INFO L225 Difference]: With dead ends: 86 [2021-11-02 23:18:52,581 INFO L226 Difference]: Without dead ends: 56 [2021-11-02 23:18:52,581 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-02 23:18:52,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-02 23:18:52,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2021-11-02 23:18:52,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.26) internal successors, (63), 50 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 23:18:52,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2021-11-02 23:18:52,588 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 31 [2021-11-02 23:18:52,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:52,588 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2021-11-02 23:18:52,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 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 23:18:52,589 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2021-11-02 23:18:52,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-02 23:18:52,590 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:52,590 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:52,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-02 23:18:52,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-02 23:18:52,818 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:52,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:52,819 INFO L85 PathProgramCache]: Analyzing trace with hash -568371359, now seen corresponding path program 6 times [2021-11-02 23:18:52,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:52,819 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897678802] [2021-11-02 23:18:52,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:52,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:52,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:52,918 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-02 23:18:52,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:52,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897678802] [2021-11-02 23:18:52,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897678802] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:52,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188378688] [2021-11-02 23:18:52,919 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:18:52,919 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:52,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:52,929 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:52,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-02 23:18:53,048 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-02 23:18:53,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:18:53,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-02 23:18:53,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:53,204 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-02 23:18:53,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188378688] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:53,205 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:18:53,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-11-02 23:18:53,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273869542] [2021-11-02 23:18:53,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-02 23:18:53,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:53,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-02 23:18:53,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-11-02 23:18:53,211 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 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 23:18:53,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:53,286 INFO L93 Difference]: Finished difference Result 100 states and 130 transitions. [2021-11-02 23:18:53,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 23:18:53,286 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 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 36 [2021-11-02 23:18:53,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:53,291 INFO L225 Difference]: With dead ends: 100 [2021-11-02 23:18:53,291 INFO L226 Difference]: Without dead ends: 64 [2021-11-02 23:18:53,291 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-11-02 23:18:53,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-02 23:18:53,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2021-11-02 23:18:53,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.2586206896551724) internal successors, (73), 58 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 23:18:53,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 73 transitions. [2021-11-02 23:18:53,299 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 73 transitions. Word has length 36 [2021-11-02 23:18:53,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:53,300 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 73 transitions. [2021-11-02 23:18:53,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 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 23:18:53,300 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 73 transitions. [2021-11-02 23:18:53,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-02 23:18:53,302 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:53,302 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:53,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-02 23:18:53,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:53,506 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:53,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:53,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1072367713, now seen corresponding path program 7 times [2021-11-02 23:18:53,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:53,507 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612117993] [2021-11-02 23:18:53,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:53,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:53,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:53,641 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-02 23:18:53,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:53,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612117993] [2021-11-02 23:18:53,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612117993] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:53,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030796160] [2021-11-02 23:18:53,643 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:18:53,644 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:53,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:53,646 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:53,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-02 23:18:53,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:53,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-02 23:18:53,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:53,890 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-02 23:18:53,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030796160] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:53,891 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:18:53,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-11-02 23:18:53,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669816936] [2021-11-02 23:18:53,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 23:18:53,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:53,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 23:18:53,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-11-02 23:18:53,895 INFO L87 Difference]: Start difference. First operand 59 states and 73 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:53,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:53,932 INFO L93 Difference]: Finished difference Result 104 states and 132 transitions. [2021-11-02 23:18:53,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 23:18:53,937 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-02 23:18:53,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:53,937 INFO L225 Difference]: With dead ends: 104 [2021-11-02 23:18:53,937 INFO L226 Difference]: Without dead ends: 62 [2021-11-02 23:18:53,938 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-11-02 23:18:53,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-02 23:18:53,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-11-02 23:18:53,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.25) internal successors, (75), 60 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 23:18:53,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 75 transitions. [2021-11-02 23:18:53,942 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 75 transitions. Word has length 41 [2021-11-02 23:18:53,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:53,942 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 75 transitions. [2021-11-02 23:18:53,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:53,943 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 75 transitions. [2021-11-02 23:18:53,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-02 23:18:53,944 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:53,944 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:53,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-02 23:18:54,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-02 23:18:54,148 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:54,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:54,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1876143325, now seen corresponding path program 8 times [2021-11-02 23:18:54,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:54,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010838130] [2021-11-02 23:18:54,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:54,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:54,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:54,265 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-02 23:18:54,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:54,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010838130] [2021-11-02 23:18:54,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010838130] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:54,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063803846] [2021-11-02 23:18:54,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:18:54,266 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:54,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:54,268 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:54,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-02 23:18:54,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:18:54,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:18:54,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-02 23:18:54,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:54,547 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-02 23:18:54,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063803846] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:54,547 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:18:54,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-11-02 23:18:54,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199885116] [2021-11-02 23:18:54,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-02 23:18:54,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:54,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-02 23:18:54,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-02 23:18:54,549 INFO L87 Difference]: Start difference. First operand 61 states and 75 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:54,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:54,587 INFO L93 Difference]: Finished difference Result 106 states and 134 transitions. [2021-11-02 23:18:54,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 23:18:54,588 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-02 23:18:54,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:54,589 INFO L225 Difference]: With dead ends: 106 [2021-11-02 23:18:54,589 INFO L226 Difference]: Without dead ends: 64 [2021-11-02 23:18:54,590 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-02 23:18:54,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-02 23:18:54,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-11-02 23:18:54,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.2419354838709677) internal successors, (77), 62 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 23:18:54,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2021-11-02 23:18:54,595 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 43 [2021-11-02 23:18:54,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:54,600 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2021-11-02 23:18:54,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:54,600 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2021-11-02 23:18:54,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-02 23:18:54,604 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:54,605 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:54,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-02 23:18:54,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-02 23:18:54,830 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:54,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:54,830 INFO L85 PathProgramCache]: Analyzing trace with hash 716835483, now seen corresponding path program 9 times [2021-11-02 23:18:54,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:54,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568130649] [2021-11-02 23:18:54,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:54,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:54,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:54,963 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-02 23:18:54,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:54,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568130649] [2021-11-02 23:18:54,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568130649] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:54,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721975520] [2021-11-02 23:18:54,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:18:54,964 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:54,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:54,965 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:54,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-02 23:18:55,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-02 23:18:55,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:18:55,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-02 23:18:55,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:55,519 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 23:18:55,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 28 [2021-11-02 23:18:55,557 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-11-02 23:18:55,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721975520] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:55,557 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:18:55,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2021-11-02 23:18:55,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101641183] [2021-11-02 23:18:55,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-02 23:18:55,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:55,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-02 23:18:55,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2021-11-02 23:18:55,559 INFO L87 Difference]: Start difference. First operand 63 states and 77 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 23:18:55,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:55,957 INFO L93 Difference]: Finished difference Result 127 states and 161 transitions. [2021-11-02 23:18:55,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-02 23:18:55,958 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 45 [2021-11-02 23:18:55,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:55,959 INFO L225 Difference]: With dead ends: 127 [2021-11-02 23:18:55,959 INFO L226 Difference]: Without dead ends: 85 [2021-11-02 23:18:55,960 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=257, Invalid=933, Unknown=0, NotChecked=0, Total=1190 [2021-11-02 23:18:55,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-11-02 23:18:55,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 68. [2021-11-02 23:18:55,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.2238805970149254) internal successors, (82), 67 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:55,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 82 transitions. [2021-11-02 23:18:55,966 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 82 transitions. Word has length 45 [2021-11-02 23:18:55,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:55,966 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 82 transitions. [2021-11-02 23:18:55,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 23:18:55,966 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 82 transitions. [2021-11-02 23:18:55,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-02 23:18:55,967 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:55,967 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:55,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-02 23:18:56,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:56,194 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:56,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:56,194 INFO L85 PathProgramCache]: Analyzing trace with hash 954995151, now seen corresponding path program 1 times [2021-11-02 23:18:56,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:56,195 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140028892] [2021-11-02 23:18:56,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:56,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:56,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:56,344 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-02 23:18:56,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:56,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140028892] [2021-11-02 23:18:56,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140028892] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:56,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824305359] [2021-11-02 23:18:56,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:56,346 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:56,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:56,347 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:56,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-02 23:18:56,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:56,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-02 23:18:56,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:56,664 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-02 23:18:56,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824305359] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:56,665 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:18:56,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-11-02 23:18:56,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48797951] [2021-11-02 23:18:56,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-02 23:18:56,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:56,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-02 23:18:56,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-11-02 23:18:56,667 INFO L87 Difference]: Start difference. First operand 68 states and 82 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 23:18:56,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:56,716 INFO L93 Difference]: Finished difference Result 116 states and 144 transitions. [2021-11-02 23:18:56,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-02 23:18:56,717 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 51 [2021-11-02 23:18:56,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:56,718 INFO L225 Difference]: With dead ends: 116 [2021-11-02 23:18:56,718 INFO L226 Difference]: Without dead ends: 71 [2021-11-02 23:18:56,719 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-11-02 23:18:56,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-02 23:18:56,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2021-11-02 23:18:56,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.2173913043478262) internal successors, (84), 69 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 23:18:56,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 84 transitions. [2021-11-02 23:18:56,729 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 84 transitions. Word has length 51 [2021-11-02 23:18:56,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:56,730 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 84 transitions. [2021-11-02 23:18:56,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 23:18:56,730 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 84 transitions. [2021-11-02 23:18:56,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-02 23:18:56,731 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:56,731 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:56,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-02 23:18:56,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:56,953 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:56,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:56,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1796222579, now seen corresponding path program 2 times [2021-11-02 23:18:56,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:56,954 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726314097] [2021-11-02 23:18:56,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:56,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:56,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:57,090 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-02 23:18:57,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:57,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726314097] [2021-11-02 23:18:57,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726314097] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:57,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164286311] [2021-11-02 23:18:57,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:18:57,091 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:57,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:57,092 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:57,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-02 23:18:57,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:18:57,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:18:57,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-02 23:18:57,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:57,438 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-02 23:18:57,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164286311] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:57,438 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:18:57,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-11-02 23:18:57,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375500310] [2021-11-02 23:18:57,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-02 23:18:57,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:57,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-02 23:18:57,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-11-02 23:18:57,440 INFO L87 Difference]: Start difference. First operand 70 states and 84 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 23:18:57,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:57,489 INFO L93 Difference]: Finished difference Result 118 states and 146 transitions. [2021-11-02 23:18:57,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 23:18:57,489 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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) Word has length 53 [2021-11-02 23:18:57,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:57,490 INFO L225 Difference]: With dead ends: 118 [2021-11-02 23:18:57,490 INFO L226 Difference]: Without dead ends: 73 [2021-11-02 23:18:57,494 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-11-02 23:18:57,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-02 23:18:57,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2021-11-02 23:18:57,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.2112676056338028) internal successors, (86), 71 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 23:18:57,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 86 transitions. [2021-11-02 23:18:57,506 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 86 transitions. Word has length 53 [2021-11-02 23:18:57,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:57,506 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 86 transitions. [2021-11-02 23:18:57,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 23:18:57,507 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 86 transitions. [2021-11-02 23:18:57,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-02 23:18:57,508 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:57,508 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:57,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-02 23:18:57,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-02 23:18:57,726 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:57,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:57,726 INFO L85 PathProgramCache]: Analyzing trace with hash -16606773, now seen corresponding path program 3 times [2021-11-02 23:18:57,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:57,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569012420] [2021-11-02 23:18:57,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:57,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:57,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:57,876 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-02 23:18:57,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:57,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569012420] [2021-11-02 23:18:57,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569012420] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:57,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944612058] [2021-11-02 23:18:57,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:18:57,876 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:57,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:57,877 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:57,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-02 23:18:58,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-02 23:18:58,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:18:58,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-02 23:18:58,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:58,243 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2021-11-02 23:18:58,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944612058] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:58,243 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:18:58,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8] total 21 [2021-11-02 23:18:58,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773907934] [2021-11-02 23:18:58,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-02 23:18:58,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:58,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-02 23:18:58,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2021-11-02 23:18:58,246 INFO L87 Difference]: Start difference. First operand 72 states and 86 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:58,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:58,322 INFO L93 Difference]: Finished difference Result 130 states and 164 transitions. [2021-11-02 23:18:58,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-02 23:18:58,323 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-02 23:18:58,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:58,324 INFO L225 Difference]: With dead ends: 130 [2021-11-02 23:18:58,324 INFO L226 Difference]: Without dead ends: 85 [2021-11-02 23:18:58,327 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2021-11-02 23:18:58,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-11-02 23:18:58,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 80. [2021-11-02 23:18:58,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.2151898734177216) internal successors, (96), 79 states have internal predecessors, (96), 0 states have call successors, (0), 0 states 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 23:18:58,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 96 transitions. [2021-11-02 23:18:58,333 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 96 transitions. Word has length 55 [2021-11-02 23:18:58,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:58,333 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 96 transitions. [2021-11-02 23:18:58,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:58,334 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 96 transitions. [2021-11-02 23:18:58,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-02 23:18:58,335 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:58,335 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:58,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-02 23:18:58,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-02 23:18:58,550 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:58,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:58,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1404931173, now seen corresponding path program 4 times [2021-11-02 23:18:58,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:58,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404776331] [2021-11-02 23:18:58,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:58,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:58,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:58,695 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-02 23:18:58,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:58,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404776331] [2021-11-02 23:18:58,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404776331] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:58,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154953384] [2021-11-02 23:18:58,696 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:18:58,696 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:58,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:58,702 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:58,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-02 23:18:58,915 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:18:58,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:18:58,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-02 23:18:58,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:59,087 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-02 23:18:59,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154953384] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:59,087 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:18:59,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-11-02 23:18:59,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412269962] [2021-11-02 23:18:59,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-02 23:18:59,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:59,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-02 23:18:59,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-11-02 23:18:59,090 INFO L87 Difference]: Start difference. First operand 80 states and 96 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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 23:18:59,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:59,135 INFO L93 Difference]: Finished difference Result 134 states and 166 transitions. [2021-11-02 23:18:59,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-02 23:18:59,135 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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) Word has length 60 [2021-11-02 23:18:59,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:59,136 INFO L225 Difference]: With dead ends: 134 [2021-11-02 23:18:59,137 INFO L226 Difference]: Without dead ends: 83 [2021-11-02 23:18:59,137 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-11-02 23:18:59,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-02 23:18:59,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2021-11-02 23:18:59,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.2098765432098766) internal successors, (98), 81 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 23:18:59,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 98 transitions. [2021-11-02 23:18:59,142 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 98 transitions. Word has length 60 [2021-11-02 23:18:59,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:59,142 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 98 transitions. [2021-11-02 23:18:59,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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 23:18:59,143 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 98 transitions. [2021-11-02 23:18:59,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-02 23:18:59,145 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:59,145 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:59,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-02 23:18:59,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-02 23:18:59,370 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:59,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:59,370 INFO L85 PathProgramCache]: Analyzing trace with hash -452812185, now seen corresponding path program 5 times [2021-11-02 23:18:59,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:59,371 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728126930] [2021-11-02 23:18:59,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:59,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:59,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:59,560 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-02 23:18:59,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:59,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728126930] [2021-11-02 23:18:59,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728126930] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:59,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031887963] [2021-11-02 23:18:59,561 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:18:59,561 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:59,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:59,562 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:59,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-02 23:18:59,885 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-11-02 23:18:59,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:18:59,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-02 23:18:59,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:19:00,123 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2021-11-02 23:19:00,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031887963] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:00,123 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:19:00,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9] total 24 [2021-11-02 23:19:00,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768547218] [2021-11-02 23:19:00,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-02 23:19:00,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:00,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-02 23:19:00,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2021-11-02 23:19:00,126 INFO L87 Difference]: Start difference. First operand 82 states and 98 transitions. Second operand has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 24 states have internal predecessors, (71), 0 states have call successors, (0), 0 states 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 23:19:00,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:19:00,219 INFO L93 Difference]: Finished difference Result 146 states and 184 transitions. [2021-11-02 23:19:00,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-02 23:19:00,220 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 24 states have internal predecessors, (71), 0 states have call successors, (0), 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 62 [2021-11-02 23:19:00,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:19:00,221 INFO L225 Difference]: With dead ends: 146 [2021-11-02 23:19:00,221 INFO L226 Difference]: Without dead ends: 95 [2021-11-02 23:19:00,222 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2021-11-02 23:19:00,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-02 23:19:00,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 90. [2021-11-02 23:19:00,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.2134831460674158) internal successors, (108), 89 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 23:19:00,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 108 transitions. [2021-11-02 23:19:00,229 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 108 transitions. Word has length 62 [2021-11-02 23:19:00,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:19:00,230 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 108 transitions. [2021-11-02 23:19:00,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 24 states have internal predecessors, (71), 0 states have call successors, (0), 0 states 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 23:19:00,231 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 108 transitions. [2021-11-02 23:19:00,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-02 23:19:00,231 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:19:00,231 INFO L513 BasicCegarLoop]: trace histogram [15, 15, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:19:00,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-02 23:19:00,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-02 23:19:00,432 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:19:00,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:00,433 INFO L85 PathProgramCache]: Analyzing trace with hash -313320699, now seen corresponding path program 6 times [2021-11-02 23:19:00,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:00,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852366980] [2021-11-02 23:19:00,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:00,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:00,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:00,622 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-02 23:19:00,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:00,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852366980] [2021-11-02 23:19:00,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852366980] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:00,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552587428] [2021-11-02 23:19:00,623 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:19:00,623 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:00,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:19:00,624 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:19:00,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-02 23:19:00,991 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-11-02 23:19:00,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:19:00,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-02 23:19:00,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:19:01,571 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-02 23:19:01,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 31 [2021-11-02 23:19:01,603 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 1 proven. 88 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2021-11-02 23:19:01,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552587428] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:01,604 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:19:01,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 29 [2021-11-02 23:19:01,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834533021] [2021-11-02 23:19:01,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-02 23:19:01,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:01,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-02 23:19:01,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=611, Unknown=0, NotChecked=0, Total=812 [2021-11-02 23:19:01,606 INFO L87 Difference]: Start difference. First operand 90 states and 108 transitions. Second operand has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 29 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 23:19:02,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:19:02,037 INFO L93 Difference]: Finished difference Result 191 states and 240 transitions. [2021-11-02 23:19:02,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-02 23:19:02,038 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 29 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 67 [2021-11-02 23:19:02,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:19:02,041 INFO L225 Difference]: With dead ends: 191 [2021-11-02 23:19:02,041 INFO L226 Difference]: Without dead ends: 134 [2021-11-02 23:19:02,042 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=248, Invalid=1084, Unknown=0, NotChecked=0, Total=1332 [2021-11-02 23:19:02,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-11-02 23:19:02,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 96. [2021-11-02 23:19:02,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.2) internal successors, (114), 95 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 23:19:02,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 114 transitions. [2021-11-02 23:19:02,052 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 114 transitions. Word has length 67 [2021-11-02 23:19:02,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:19:02,052 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 114 transitions. [2021-11-02 23:19:02,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 29 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 23:19:02,052 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 114 transitions. [2021-11-02 23:19:02,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-02 23:19:02,053 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:19:02,053 INFO L513 BasicCegarLoop]: trace histogram [16, 16, 7, 7, 7, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:19:02,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-02 23:19:02,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-02 23:19:02,262 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:19:02,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:02,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1186642617, now seen corresponding path program 7 times [2021-11-02 23:19:02,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:02,263 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320984994] [2021-11-02 23:19:02,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:02,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:02,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:02,494 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-02 23:19:02,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:02,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320984994] [2021-11-02 23:19:02,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320984994] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:02,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43884253] [2021-11-02 23:19:02,494 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:19:02,495 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:02,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:19:02,496 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:19:02,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-02 23:19:02,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:02,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-02 23:19:02,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:19:02,935 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-02 23:19:02,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43884253] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:02,936 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:19:02,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-11-02 23:19:02,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687859590] [2021-11-02 23:19:02,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-02 23:19:02,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:02,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-02 23:19:02,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-11-02 23:19:02,939 INFO L87 Difference]: Start difference. First operand 96 states and 114 transitions. Second operand has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states 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 23:19:02,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:19:02,984 INFO L93 Difference]: Finished difference Result 160 states and 196 transitions. [2021-11-02 23:19:02,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-02 23:19:02,984 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 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 73 [2021-11-02 23:19:02,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:19:02,985 INFO L225 Difference]: With dead ends: 160 [2021-11-02 23:19:02,985 INFO L226 Difference]: Without dead ends: 99 [2021-11-02 23:19:02,986 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-11-02 23:19:02,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-11-02 23:19:02,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2021-11-02 23:19:02,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.1958762886597938) internal successors, (116), 97 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 23:19:02,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 116 transitions. [2021-11-02 23:19:02,991 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 116 transitions. Word has length 73 [2021-11-02 23:19:02,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:19:02,992 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 116 transitions. [2021-11-02 23:19:02,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states 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 23:19:02,992 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 116 transitions. [2021-11-02 23:19:02,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-02 23:19:02,993 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:19:02,993 INFO L513 BasicCegarLoop]: trace histogram [17, 17, 7, 7, 7, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:19:03,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-02 23:19:03,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:03,218 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:19:03,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:03,218 INFO L85 PathProgramCache]: Analyzing trace with hash -2136672265, now seen corresponding path program 8 times [2021-11-02 23:19:03,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:03,219 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755404528] [2021-11-02 23:19:03,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:03,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:03,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:03,461 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-02 23:19:03,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:03,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755404528] [2021-11-02 23:19:03,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755404528] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:03,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47873921] [2021-11-02 23:19:03,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:19:03,461 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:03,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:19:03,466 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:19:03,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-02 23:19:03,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:19:03,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:19:03,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-02 23:19:03,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:19:04,015 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-02 23:19:04,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47873921] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:04,015 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:19:04,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-11-02 23:19:04,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121980225] [2021-11-02 23:19:04,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-02 23:19:04,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:04,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-02 23:19:04,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-11-02 23:19:04,017 INFO L87 Difference]: Start difference. First operand 98 states and 116 transitions. Second operand has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 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 23:19:04,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:19:04,073 INFO L93 Difference]: Finished difference Result 162 states and 198 transitions. [2021-11-02 23:19:04,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-02 23:19:04,074 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 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 75 [2021-11-02 23:19:04,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:19:04,075 INFO L225 Difference]: With dead ends: 162 [2021-11-02 23:19:04,075 INFO L226 Difference]: Without dead ends: 101 [2021-11-02 23:19:04,076 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-11-02 23:19:04,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-11-02 23:19:04,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2021-11-02 23:19:04,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.1919191919191918) internal successors, (118), 99 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 23:19:04,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 118 transitions. [2021-11-02 23:19:04,081 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 118 transitions. Word has length 75 [2021-11-02 23:19:04,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:19:04,082 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 118 transitions. [2021-11-02 23:19:04,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 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 23:19:04,082 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 118 transitions. [2021-11-02 23:19:04,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-02 23:19:04,083 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:19:04,083 INFO L513 BasicCegarLoop]: trace histogram [18, 18, 7, 7, 7, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:19:04,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-02 23:19:04,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:04,296 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:19:04,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:04,297 INFO L85 PathProgramCache]: Analyzing trace with hash -386605643, now seen corresponding path program 9 times [2021-11-02 23:19:04,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:04,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604660492] [2021-11-02 23:19:04,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:04,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:04,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:04,551 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-02 23:19:04,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:04,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604660492] [2021-11-02 23:19:04,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604660492] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:04,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015971583] [2021-11-02 23:19:04,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:19:04,552 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:04,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:19:04,553 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:19:04,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-02 23:19:04,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-02 23:19:04,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:19:04,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-02 23:19:04,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:19:05,212 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 1 proven. 70 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2021-11-02 23:19:05,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015971583] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:05,212 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:19:05,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 10] total 29 [2021-11-02 23:19:05,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791554543] [2021-11-02 23:19:05,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-02 23:19:05,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:05,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-02 23:19:05,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=558, Unknown=0, NotChecked=0, Total=812 [2021-11-02 23:19:05,214 INFO L87 Difference]: Start difference. First operand 100 states and 118 transitions. Second operand has 29 states, 29 states have (on average 2.8275862068965516) internal successors, (82), 29 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 23:19:05,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:19:05,337 INFO L93 Difference]: Finished difference Result 174 states and 216 transitions. [2021-11-02 23:19:05,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-02 23:19:05,342 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.8275862068965516) internal successors, (82), 29 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) Word has length 77 [2021-11-02 23:19:05,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:19:05,343 INFO L225 Difference]: With dead ends: 174 [2021-11-02 23:19:05,343 INFO L226 Difference]: Without dead ends: 113 [2021-11-02 23:19:05,344 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=254, Invalid=558, Unknown=0, NotChecked=0, Total=812 [2021-11-02 23:19:05,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-11-02 23:19:05,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 108. [2021-11-02 23:19:05,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.1962616822429906) internal successors, (128), 107 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 23:19:05,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 128 transitions. [2021-11-02 23:19:05,350 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 128 transitions. Word has length 77 [2021-11-02 23:19:05,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:19:05,350 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 128 transitions. [2021-11-02 23:19:05,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.8275862068965516) internal successors, (82), 29 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 23:19:05,351 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 128 transitions. [2021-11-02 23:19:05,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-02 23:19:05,352 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:19:05,352 INFO L513 BasicCegarLoop]: trace histogram [19, 19, 8, 8, 8, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:19:05,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-02 23:19:05,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:05,578 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:19:05,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:05,578 INFO L85 PathProgramCache]: Analyzing trace with hash -26441113, now seen corresponding path program 10 times [2021-11-02 23:19:05,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:05,578 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686408589] [2021-11-02 23:19:05,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:05,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:05,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:05,809 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-02 23:19:05,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:05,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686408589] [2021-11-02 23:19:05,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686408589] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:05,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704424277] [2021-11-02 23:19:05,809 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:19:05,809 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:05,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:19:05,816 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:19:05,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-02 23:19:06,135 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:19:06,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:19:06,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-02 23:19:06,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:19:06,457 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 1 proven. 92 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2021-11-02 23:19:06,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704424277] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:06,457 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:19:06,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 11] total 31 [2021-11-02 23:19:06,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146917012] [2021-11-02 23:19:06,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-02 23:19:06,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:06,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-02 23:19:06,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=645, Unknown=0, NotChecked=0, Total=930 [2021-11-02 23:19:06,459 INFO L87 Difference]: Start difference. First operand 108 states and 128 transitions. Second operand has 31 states, 31 states have (on average 2.806451612903226) internal successors, (87), 31 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 23:19:06,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:19:06,558 INFO L93 Difference]: Finished difference Result 188 states and 234 transitions. [2021-11-02 23:19:06,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-02 23:19:06,560 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.806451612903226) internal successors, (87), 31 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) Word has length 82 [2021-11-02 23:19:06,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:19:06,561 INFO L225 Difference]: With dead ends: 188 [2021-11-02 23:19:06,561 INFO L226 Difference]: Without dead ends: 121 [2021-11-02 23:19:06,562 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=285, Invalid=645, Unknown=0, NotChecked=0, Total=930 [2021-11-02 23:19:06,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-11-02 23:19:06,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 116. [2021-11-02 23:19:06,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.2) internal successors, (138), 115 states have internal predecessors, (138), 0 states have call successors, (0), 0 states 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 23:19:06,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 138 transitions. [2021-11-02 23:19:06,568 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 138 transitions. Word has length 82 [2021-11-02 23:19:06,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:19:06,568 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 138 transitions. [2021-11-02 23:19:06,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.806451612903226) internal successors, (87), 31 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 23:19:06,568 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 138 transitions. [2021-11-02 23:19:06,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-02 23:19:06,569 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:19:06,569 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 9, 9, 9, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:19:06,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-02 23:19:06,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:06,782 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:19:06,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:06,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1547212721, now seen corresponding path program 11 times [2021-11-02 23:19:06,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:06,783 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445305027] [2021-11-02 23:19:06,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:06,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:06,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:07,063 INFO L134 CoverageAnalysis]: Checked inductivity of 526 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-11-02 23:19:07,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:07,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445305027] [2021-11-02 23:19:07,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445305027] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:07,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986355724] [2021-11-02 23:19:07,064 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:19:07,064 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:07,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:19:07,065 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:19:07,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-02 23:19:07,725 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2021-11-02 23:19:07,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:19:07,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-02 23:19:07,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:19:08,045 INFO L134 CoverageAnalysis]: Checked inductivity of 526 backedges. 1 proven. 117 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2021-11-02 23:19:08,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986355724] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:08,045 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:19:08,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12] total 33 [2021-11-02 23:19:08,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773471259] [2021-11-02 23:19:08,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-02 23:19:08,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:08,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-02 23:19:08,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=738, Unknown=0, NotChecked=0, Total=1056 [2021-11-02 23:19:08,048 INFO L87 Difference]: Start difference. First operand 116 states and 138 transitions. Second operand has 33 states, 33 states have (on average 2.787878787878788) internal successors, (92), 33 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 23:19:08,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:19:08,170 INFO L93 Difference]: Finished difference Result 202 states and 252 transitions. [2021-11-02 23:19:08,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-02 23:19:08,170 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.787878787878788) internal successors, (92), 33 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) Word has length 87 [2021-11-02 23:19:08,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:19:08,171 INFO L225 Difference]: With dead ends: 202 [2021-11-02 23:19:08,172 INFO L226 Difference]: Without dead ends: 129 [2021-11-02 23:19:08,172 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=318, Invalid=738, Unknown=0, NotChecked=0, Total=1056 [2021-11-02 23:19:08,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-11-02 23:19:08,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 124. [2021-11-02 23:19:08,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.2032520325203253) internal successors, (148), 123 states have internal predecessors, (148), 0 states have call successors, (0), 0 states 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 23:19:08,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 148 transitions. [2021-11-02 23:19:08,179 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 148 transitions. Word has length 87 [2021-11-02 23:19:08,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:19:08,179 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 148 transitions. [2021-11-02 23:19:08,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.787878787878788) internal successors, (92), 33 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 23:19:08,179 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 148 transitions. [2021-11-02 23:19:08,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-02 23:19:08,180 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:19:08,180 INFO L513 BasicCegarLoop]: trace histogram [21, 21, 10, 10, 10, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:19:08,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-02 23:19:08,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-02 23:19:08,401 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:19:08,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:08,402 INFO L85 PathProgramCache]: Analyzing trace with hash -279911317, now seen corresponding path program 12 times [2021-11-02 23:19:08,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:08,402 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301839282] [2021-11-02 23:19:08,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:08,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:08,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:08,706 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-11-02 23:19:08,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:08,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301839282] [2021-11-02 23:19:08,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301839282] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:08,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615767045] [2021-11-02 23:19:08,707 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:19:08,707 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:08,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:19:08,708 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:19:08,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-02 23:19:09,704 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-11-02 23:19:09,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:19:09,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-02 23:19:09,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:19:10,383 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-02 23:19:10,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 31 [2021-11-02 23:19:10,410 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 1 proven. 76 refuted. 0 times theorem prover too weak. 518 trivial. 0 not checked. [2021-11-02 23:19:10,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615767045] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:10,411 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:19:10,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 14] total 36 [2021-11-02 23:19:10,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885333597] [2021-11-02 23:19:10,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-02 23:19:10,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:10,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-02 23:19:10,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=947, Unknown=0, NotChecked=0, Total=1260 [2021-11-02 23:19:10,412 INFO L87 Difference]: Start difference. First operand 124 states and 148 transitions. Second operand has 36 states, 36 states have (on average 2.5277777777777777) internal successors, (91), 36 states have internal predecessors, (91), 0 states have call successors, (0), 0 states 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 23:19:10,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:19:10,932 INFO L93 Difference]: Finished difference Result 262 states and 328 transitions. [2021-11-02 23:19:10,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-02 23:19:10,932 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.5277777777777777) internal successors, (91), 36 states have internal predecessors, (91), 0 states have call successors, (0), 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 92 [2021-11-02 23:19:10,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:19:10,934 INFO L225 Difference]: With dead ends: 262 [2021-11-02 23:19:10,934 INFO L226 Difference]: Without dead ends: 183 [2021-11-02 23:19:10,935 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=364, Invalid=1616, Unknown=0, NotChecked=0, Total=1980 [2021-11-02 23:19:10,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-11-02 23:19:10,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 130. [2021-11-02 23:19:10,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.193798449612403) internal successors, (154), 129 states have internal predecessors, (154), 0 states have call successors, (0), 0 states 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 23:19:10,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 154 transitions. [2021-11-02 23:19:10,942 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 154 transitions. Word has length 92 [2021-11-02 23:19:10,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:19:10,942 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 154 transitions. [2021-11-02 23:19:10,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.5277777777777777) internal successors, (91), 36 states have internal predecessors, (91), 0 states have call successors, (0), 0 states 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 23:19:10,943 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 154 transitions. [2021-11-02 23:19:10,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-02 23:19:10,944 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:19:10,944 INFO L513 BasicCegarLoop]: trace histogram [22, 22, 10, 10, 10, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:19:10,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-02 23:19:11,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-02 23:19:11,170 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:19:11,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:11,170 INFO L85 PathProgramCache]: Analyzing trace with hash 156674403, now seen corresponding path program 13 times [2021-11-02 23:19:11,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:11,171 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652556944] [2021-11-02 23:19:11,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:11,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:11,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:11,447 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2021-11-02 23:19:11,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:11,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652556944] [2021-11-02 23:19:11,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652556944] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:11,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360869291] [2021-11-02 23:19:11,448 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:19:11,448 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:11,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:19:11,449 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:19:11,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-02 23:19:11,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:11,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-02 23:19:11,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:19:12,055 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2021-11-02 23:19:12,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360869291] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:12,055 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:19:12,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-11-02 23:19:12,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417235802] [2021-11-02 23:19:12,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-02 23:19:12,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:12,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-02 23:19:12,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-11-02 23:19:12,057 INFO L87 Difference]: Start difference. First operand 130 states and 154 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 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 23:19:12,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:19:12,131 INFO L93 Difference]: Finished difference Result 216 states and 264 transitions. [2021-11-02 23:19:12,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-02 23:19:12,131 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 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 98 [2021-11-02 23:19:12,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:19:12,133 INFO L225 Difference]: With dead ends: 216 [2021-11-02 23:19:12,133 INFO L226 Difference]: Without dead ends: 133 [2021-11-02 23:19:12,133 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-11-02 23:19:12,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-11-02 23:19:12,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2021-11-02 23:19:12,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.1908396946564885) internal successors, (156), 131 states have internal predecessors, (156), 0 states have call successors, (0), 0 states 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 23:19:12,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 156 transitions. [2021-11-02 23:19:12,142 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 156 transitions. Word has length 98 [2021-11-02 23:19:12,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:19:12,142 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 156 transitions. [2021-11-02 23:19:12,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 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 23:19:12,143 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 156 transitions. [2021-11-02 23:19:12,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-02 23:19:12,145 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:19:12,145 INFO L513 BasicCegarLoop]: trace histogram [23, 23, 10, 10, 10, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:19:12,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-02 23:19:12,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-02 23:19:12,366 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:19:12,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:12,366 INFO L85 PathProgramCache]: Analyzing trace with hash 639446501, now seen corresponding path program 14 times [2021-11-02 23:19:12,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:12,367 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66026246] [2021-11-02 23:19:12,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:12,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:12,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:12,720 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2021-11-02 23:19:12,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:12,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66026246] [2021-11-02 23:19:12,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66026246] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:12,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908721742] [2021-11-02 23:19:12,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:19:12,721 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:12,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:19:12,722 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:19:12,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-02 23:19:13,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:19:13,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:19:13,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-02 23:19:13,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:19:13,470 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2021-11-02 23:19:13,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908721742] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:13,471 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:19:13,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-11-02 23:19:13,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082081533] [2021-11-02 23:19:13,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-02 23:19:13,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:13,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-02 23:19:13,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-11-02 23:19:13,472 INFO L87 Difference]: Start difference. First operand 132 states and 156 transitions. Second operand has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:13,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:19:13,543 INFO L93 Difference]: Finished difference Result 218 states and 266 transitions. [2021-11-02 23:19:13,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-02 23:19:13,543 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-11-02 23:19:13,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:19:13,544 INFO L225 Difference]: With dead ends: 218 [2021-11-02 23:19:13,544 INFO L226 Difference]: Without dead ends: 135 [2021-11-02 23:19:13,545 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-11-02 23:19:13,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-11-02 23:19:13,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2021-11-02 23:19:13,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.1879699248120301) internal successors, (158), 133 states have internal predecessors, (158), 0 states have call successors, (0), 0 states 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 23:19:13,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 158 transitions. [2021-11-02 23:19:13,551 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 158 transitions. Word has length 100 [2021-11-02 23:19:13,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:19:13,551 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 158 transitions. [2021-11-02 23:19:13,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:13,552 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 158 transitions. [2021-11-02 23:19:13,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-02 23:19:13,552 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:19:13,552 INFO L513 BasicCegarLoop]: trace histogram [24, 24, 10, 10, 10, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:19:13,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-02 23:19:13,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-02 23:19:13,774 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:19:13,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:13,774 INFO L85 PathProgramCache]: Analyzing trace with hash 726964711, now seen corresponding path program 15 times [2021-11-02 23:19:13,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:13,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250851114] [2021-11-02 23:19:13,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:13,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:13,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:14,129 INFO L134 CoverageAnalysis]: Checked inductivity of 740 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2021-11-02 23:19:14,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:14,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250851114] [2021-11-02 23:19:14,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250851114] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:14,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369690049] [2021-11-02 23:19:14,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:19:14,130 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:14,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:19:14,131 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:19:14,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-02 23:19:14,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-11-02 23:19:14,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:19:14,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-02 23:19:14,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:19:15,106 INFO L134 CoverageAnalysis]: Checked inductivity of 740 backedges. 1 proven. 145 refuted. 0 times theorem prover too weak. 594 trivial. 0 not checked. [2021-11-02 23:19:15,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369690049] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:15,106 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:19:15,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 13] total 38 [2021-11-02 23:19:15,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323789646] [2021-11-02 23:19:15,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-02 23:19:15,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:15,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-02 23:19:15,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=428, Invalid=978, Unknown=0, NotChecked=0, Total=1406 [2021-11-02 23:19:15,109 INFO L87 Difference]: Start difference. First operand 134 states and 158 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 23:19:15,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:19:15,242 INFO L93 Difference]: Finished difference Result 230 states and 284 transitions. [2021-11-02 23:19:15,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-02 23:19:15,243 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 102 [2021-11-02 23:19:15,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:19:15,245 INFO L225 Difference]: With dead ends: 230 [2021-11-02 23:19:15,245 INFO L226 Difference]: Without dead ends: 147 [2021-11-02 23:19:15,246 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=428, Invalid=978, Unknown=0, NotChecked=0, Total=1406 [2021-11-02 23:19:15,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-11-02 23:19:15,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 142. [2021-11-02 23:19:15,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.1914893617021276) internal successors, (168), 141 states have internal predecessors, (168), 0 states have call successors, (0), 0 states 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 23:19:15,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 168 transitions. [2021-11-02 23:19:15,253 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 168 transitions. Word has length 102 [2021-11-02 23:19:15,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:19:15,254 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 168 transitions. [2021-11-02 23:19:15,254 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 23:19:15,254 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 168 transitions. [2021-11-02 23:19:15,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-02 23:19:15,254 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:19:15,255 INFO L513 BasicCegarLoop]: trace histogram [25, 25, 11, 11, 11, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:19:15,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-02 23:19:15,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-02 23:19:15,455 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:19:15,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:15,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1477409059, now seen corresponding path program 16 times [2021-11-02 23:19:15,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:15,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840271604] [2021-11-02 23:19:15,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:15,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:15,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:15,821 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-11-02 23:19:15,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:15,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840271604] [2021-11-02 23:19:15,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840271604] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:15,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306656373] [2021-11-02 23:19:15,822 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:19:15,822 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:15,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:19:15,826 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:19:15,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-02 23:19:16,347 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:19:16,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:19:16,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-02 23:19:16,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:19:16,616 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-11-02 23:19:16,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306656373] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:16,616 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:19:16,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-11-02 23:19:16,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447806854] [2021-11-02 23:19:16,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-02 23:19:16,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:16,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-02 23:19:16,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-11-02 23:19:16,619 INFO L87 Difference]: Start difference. First operand 142 states and 168 transitions. Second operand has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states 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 23:19:16,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:19:16,688 INFO L93 Difference]: Finished difference Result 234 states and 286 transitions. [2021-11-02 23:19:16,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-02 23:19:16,689 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 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 107 [2021-11-02 23:19:16,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:19:16,690 INFO L225 Difference]: With dead ends: 234 [2021-11-02 23:19:16,690 INFO L226 Difference]: Without dead ends: 145 [2021-11-02 23:19:16,691 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-11-02 23:19:16,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-02 23:19:16,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 144. [2021-11-02 23:19:16,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.1888111888111887) internal successors, (170), 143 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 23:19:16,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 170 transitions. [2021-11-02 23:19:16,698 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 170 transitions. Word has length 107 [2021-11-02 23:19:16,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:19:16,699 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 170 transitions. [2021-11-02 23:19:16,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states 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 23:19:16,699 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 170 transitions. [2021-11-02 23:19:16,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-02 23:19:16,700 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:19:16,700 INFO L513 BasicCegarLoop]: trace histogram [26, 26, 11, 11, 11, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:19:16,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-02 23:19:16,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-02 23:19:16,914 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:19:16,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:16,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1971975323, now seen corresponding path program 17 times [2021-11-02 23:19:16,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:16,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396041383] [2021-11-02 23:19:16,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:16,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:16,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:17,277 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-11-02 23:19:17,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:17,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396041383] [2021-11-02 23:19:17,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396041383] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:17,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91304846] [2021-11-02 23:19:17,278 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:19:17,279 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:17,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:19:17,282 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:19:17,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-02 23:19:18,306 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2021-11-02 23:19:18,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:19:18,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-02 23:19:18,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:19:18,799 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 1 proven. 176 refuted. 0 times theorem prover too weak. 694 trivial. 0 not checked. [2021-11-02 23:19:18,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91304846] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:18,799 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:19:18,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 14] total 41 [2021-11-02 23:19:18,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061834578] [2021-11-02 23:19:18,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-02 23:19:18,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:18,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-02 23:19:18,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=1144, Unknown=0, NotChecked=0, Total=1640 [2021-11-02 23:19:18,801 INFO L87 Difference]: Start difference. First operand 144 states and 170 transitions. Second operand has 41 states, 41 states have (on average 2.682926829268293) internal successors, (110), 41 states have internal predecessors, (110), 0 states have call successors, (0), 0 states 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 23:19:18,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:19:18,934 INFO L93 Difference]: Finished difference Result 246 states and 304 transitions. [2021-11-02 23:19:18,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-02 23:19:18,934 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.682926829268293) internal successors, (110), 41 states have internal predecessors, (110), 0 states have call successors, (0), 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 109 [2021-11-02 23:19:18,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:19:18,935 INFO L225 Difference]: With dead ends: 246 [2021-11-02 23:19:18,935 INFO L226 Difference]: Without dead ends: 157 [2021-11-02 23:19:18,936 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=1144, Unknown=0, NotChecked=0, Total=1640 [2021-11-02 23:19:18,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-11-02 23:19:18,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 152. [2021-11-02 23:19:18,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.1920529801324504) internal successors, (180), 151 states have internal predecessors, (180), 0 states have call successors, (0), 0 states 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 23:19:18,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 180 transitions. [2021-11-02 23:19:18,943 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 180 transitions. Word has length 109 [2021-11-02 23:19:18,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:19:18,943 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 180 transitions. [2021-11-02 23:19:18,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.682926829268293) internal successors, (110), 41 states have internal predecessors, (110), 0 states have call successors, (0), 0 states 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 23:19:18,943 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 180 transitions. [2021-11-02 23:19:18,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-02 23:19:18,944 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:19:18,944 INFO L513 BasicCegarLoop]: trace histogram [27, 27, 12, 12, 12, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:19:18,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-02 23:19:19,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-02 23:19:19,158 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:19:19,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:19,158 INFO L85 PathProgramCache]: Analyzing trace with hash 2036101997, now seen corresponding path program 18 times [2021-11-02 23:19:19,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:19,159 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380748831] [2021-11-02 23:19:19,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:19,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:19,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:19,548 INFO L134 CoverageAnalysis]: Checked inductivity of 958 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2021-11-02 23:19:19,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:19,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380748831] [2021-11-02 23:19:19,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380748831] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:19,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520088807] [2021-11-02 23:19:19,549 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:19:19,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:19,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:19:19,551 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:19:19,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-02 23:19:21,324 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-11-02 23:19:21,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:19:21,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-02 23:19:21,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:19:22,094 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-02 23:19:22,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 31 [2021-11-02 23:19:22,124 INFO L134 CoverageAnalysis]: Checked inductivity of 958 backedges. 1 proven. 281 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2021-11-02 23:19:22,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520088807] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:22,124 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:19:22,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 19] total 46 [2021-11-02 23:19:22,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178691524] [2021-11-02 23:19:22,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-02 23:19:22,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:22,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-02 23:19:22,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=535, Invalid=1535, Unknown=0, NotChecked=0, Total=2070 [2021-11-02 23:19:22,127 INFO L87 Difference]: Start difference. First operand 152 states and 180 transitions. Second operand has 46 states, 46 states have (on average 2.4782608695652173) internal successors, (114), 46 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 23:19:22,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:19:22,864 INFO L93 Difference]: Finished difference Result 315 states and 392 transitions. [2021-11-02 23:19:22,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-02 23:19:22,865 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.4782608695652173) internal successors, (114), 46 states have internal predecessors, (114), 0 states have call successors, (0), 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 114 [2021-11-02 23:19:22,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:19:22,866 INFO L225 Difference]: With dead ends: 315 [2021-11-02 23:19:22,866 INFO L226 Difference]: Without dead ends: 220 [2021-11-02 23:19:22,867 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=590, Invalid=2490, Unknown=0, NotChecked=0, Total=3080 [2021-11-02 23:19:22,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-11-02 23:19:22,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 158. [2021-11-02 23:19:22,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.1847133757961783) internal successors, (186), 157 states have internal predecessors, (186), 0 states have call successors, (0), 0 states 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 23:19:22,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 186 transitions. [2021-11-02 23:19:22,876 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 186 transitions. Word has length 114 [2021-11-02 23:19:22,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:19:22,876 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 186 transitions. [2021-11-02 23:19:22,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.4782608695652173) internal successors, (114), 46 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 23:19:22,877 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 186 transitions. [2021-11-02 23:19:22,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-02 23:19:22,877 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:19:22,878 INFO L513 BasicCegarLoop]: trace histogram [28, 28, 12, 12, 12, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:19:22,904 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-11-02 23:19:23,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:23,090 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:19:23,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:23,090 INFO L85 PathProgramCache]: Analyzing trace with hash 283531749, now seen corresponding path program 19 times [2021-11-02 23:19:23,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:23,091 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223713809] [2021-11-02 23:19:23,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:23,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:23,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:23,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2021-11-02 23:19:23,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:23,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223713809] [2021-11-02 23:19:23,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223713809] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:23,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625038708] [2021-11-02 23:19:23,519 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:19:23,519 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:23,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:19:23,522 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:19:23,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-02 23:19:24,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:24,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-02 23:19:24,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:19:24,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2021-11-02 23:19:24,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625038708] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:24,384 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:19:24,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-11-02 23:19:24,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422699438] [2021-11-02 23:19:24,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-02 23:19:24,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:24,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-02 23:19:24,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-11-02 23:19:24,387 INFO L87 Difference]: Start difference. First operand 158 states and 186 transitions. Second operand has 32 states, 32 states have (on average 2.40625) internal successors, (77), 32 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 23:19:24,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:19:24,465 INFO L93 Difference]: Finished difference Result 260 states and 316 transitions. [2021-11-02 23:19:24,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-02 23:19:24,466 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 32 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) Word has length 120 [2021-11-02 23:19:24,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:19:24,467 INFO L225 Difference]: With dead ends: 260 [2021-11-02 23:19:24,467 INFO L226 Difference]: Without dead ends: 161 [2021-11-02 23:19:24,468 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-11-02 23:19:24,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-11-02 23:19:24,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2021-11-02 23:19:24,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.1823899371069182) internal successors, (188), 159 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 23:19:24,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 188 transitions. [2021-11-02 23:19:24,476 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 188 transitions. Word has length 120 [2021-11-02 23:19:24,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:19:24,476 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 188 transitions. [2021-11-02 23:19:24,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 32 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 23:19:24,476 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 188 transitions. [2021-11-02 23:19:24,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-02 23:19:24,477 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:19:24,477 INFO L513 BasicCegarLoop]: trace histogram [29, 29, 12, 12, 12, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:19:24,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-02 23:19:24,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:24,694 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:19:24,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:24,694 INFO L85 PathProgramCache]: Analyzing trace with hash -178147097, now seen corresponding path program 20 times [2021-11-02 23:19:24,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:24,695 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191539714] [2021-11-02 23:19:24,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:24,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:24,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:25,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1084 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2021-11-02 23:19:25,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:25,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191539714] [2021-11-02 23:19:25,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191539714] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:25,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753889115] [2021-11-02 23:19:25,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:19:25,251 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:25,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:19:25,254 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:19:25,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-02 23:19:25,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:19:25,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:19:25,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-02 23:19:25,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:19:26,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1084 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2021-11-02 23:19:26,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753889115] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:26,141 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:19:26,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-11-02 23:19:26,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141557800] [2021-11-02 23:19:26,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-02 23:19:26,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:26,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-02 23:19:26,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-11-02 23:19:26,142 INFO L87 Difference]: Start difference. First operand 160 states and 188 transitions. Second operand has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 33 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:26,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:19:26,221 INFO L93 Difference]: Finished difference Result 262 states and 318 transitions. [2021-11-02 23:19:26,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-02 23:19:26,224 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 33 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 122 [2021-11-02 23:19:26,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:19:26,225 INFO L225 Difference]: With dead ends: 262 [2021-11-02 23:19:26,225 INFO L226 Difference]: Without dead ends: 163 [2021-11-02 23:19:26,227 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-11-02 23:19:26,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-11-02 23:19:26,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2021-11-02 23:19:26,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 1.1801242236024845) internal successors, (190), 161 states have internal predecessors, (190), 0 states have call successors, (0), 0 states 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 23:19:26,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 190 transitions. [2021-11-02 23:19:26,236 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 190 transitions. Word has length 122 [2021-11-02 23:19:26,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:19:26,236 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 190 transitions. [2021-11-02 23:19:26,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 33 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:26,237 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 190 transitions. [2021-11-02 23:19:26,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-02 23:19:26,238 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:19:26,238 INFO L513 BasicCegarLoop]: trace histogram [30, 30, 12, 12, 12, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:19:26,260 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-11-02 23:19:26,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:26,438 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:19:26,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:26,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1469886615, now seen corresponding path program 21 times [2021-11-02 23:19:26,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:26,439 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684636314] [2021-11-02 23:19:26,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:26,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:26,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:26,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2021-11-02 23:19:26,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:26,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684636314] [2021-11-02 23:19:26,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684636314] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:26,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845897608] [2021-11-02 23:19:26,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:19:26,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:26,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:19:26,895 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:19:26,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-02 23:19:27,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-11-02 23:19:27,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:19:27,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-02 23:19:27,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:19:28,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 1 proven. 210 refuted. 0 times theorem prover too weak. 932 trivial. 0 not checked. [2021-11-02 23:19:28,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845897608] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:28,091 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:19:28,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 15] total 46 [2021-11-02 23:19:28,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283504223] [2021-11-02 23:19:28,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-02 23:19:28,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:28,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-02 23:19:28,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=1438, Unknown=0, NotChecked=0, Total=2070 [2021-11-02 23:19:28,093 INFO L87 Difference]: Start difference. First operand 162 states and 190 transitions. Second operand has 46 states, 46 states have (on average 2.630434782608696) internal successors, (121), 46 states have internal predecessors, (121), 0 states have call successors, (0), 0 states 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 23:19:28,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:19:28,223 INFO L93 Difference]: Finished difference Result 274 states and 336 transitions. [2021-11-02 23:19:28,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-02 23:19:28,223 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.630434782608696) internal successors, (121), 46 states have internal predecessors, (121), 0 states have call successors, (0), 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 23:19:28,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:19:28,224 INFO L225 Difference]: With dead ends: 274 [2021-11-02 23:19:28,224 INFO L226 Difference]: Without dead ends: 175 [2021-11-02 23:19:28,225 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=632, Invalid=1438, Unknown=0, NotChecked=0, Total=2070 [2021-11-02 23:19:28,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-11-02 23:19:28,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 170. [2021-11-02 23:19:28,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 1.183431952662722) internal successors, (200), 169 states have internal predecessors, (200), 0 states have call successors, (0), 0 states 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 23:19:28,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 200 transitions. [2021-11-02 23:19:28,233 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 200 transitions. Word has length 124 [2021-11-02 23:19:28,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:19:28,233 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 200 transitions. [2021-11-02 23:19:28,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.630434782608696) internal successors, (121), 46 states have internal predecessors, (121), 0 states have call successors, (0), 0 states 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 23:19:28,234 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 200 transitions. [2021-11-02 23:19:28,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-02 23:19:28,234 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:19:28,235 INFO L513 BasicCegarLoop]: trace histogram [31, 31, 13, 13, 13, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:19:28,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-02 23:19:28,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-11-02 23:19:28,438 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:19:28,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:28,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1176120135, now seen corresponding path program 22 times [2021-11-02 23:19:28,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:28,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227525417] [2021-11-02 23:19:28,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:28,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:28,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:28,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1241 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2021-11-02 23:19:28,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:28,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227525417] [2021-11-02 23:19:28,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227525417] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:28,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517935052] [2021-11-02 23:19:28,963 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:19:28,963 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:28,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:19:28,964 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:19:28,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-02 23:19:29,650 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:19:29,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:19:29,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-02 23:19:29,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:19:29,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1241 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2021-11-02 23:19:29,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517935052] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:29,988 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:19:29,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-11-02 23:19:29,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229390791] [2021-11-02 23:19:29,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-02 23:19:29,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:29,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-02 23:19:29,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-11-02 23:19:29,989 INFO L87 Difference]: Start difference. First operand 170 states and 200 transitions. Second operand has 35 states, 35 states have (on average 2.3714285714285714) internal successors, (83), 35 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 23:19:30,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:19:30,084 INFO L93 Difference]: Finished difference Result 278 states and 338 transitions. [2021-11-02 23:19:30,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-02 23:19:30,085 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.3714285714285714) internal successors, (83), 35 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 129 [2021-11-02 23:19:30,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:19:30,086 INFO L225 Difference]: With dead ends: 278 [2021-11-02 23:19:30,086 INFO L226 Difference]: Without dead ends: 173 [2021-11-02 23:19:30,087 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-11-02 23:19:30,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-11-02 23:19:30,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 172. [2021-11-02 23:19:30,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 1.1812865497076024) internal successors, (202), 171 states have internal predecessors, (202), 0 states have call successors, (0), 0 states 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 23:19:30,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 202 transitions. [2021-11-02 23:19:30,095 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 202 transitions. Word has length 129 [2021-11-02 23:19:30,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:19:30,095 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 202 transitions. [2021-11-02 23:19:30,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.3714285714285714) internal successors, (83), 35 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 23:19:30,095 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 202 transitions. [2021-11-02 23:19:30,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-02 23:19:30,096 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:19:30,096 INFO L513 BasicCegarLoop]: trace histogram [32, 32, 13, 13, 13, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:19:30,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-02 23:19:30,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-02 23:19:30,310 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:19:30,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:30,310 INFO L85 PathProgramCache]: Analyzing trace with hash 436442757, now seen corresponding path program 23 times [2021-11-02 23:19:30,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:30,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680091972] [2021-11-02 23:19:30,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:30,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:30,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:30,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1304 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2021-11-02 23:19:30,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:30,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680091972] [2021-11-02 23:19:30,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680091972] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:30,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788761076] [2021-11-02 23:19:30,860 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:19:30,877 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:30,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:19:30,878 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:19:30,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-02 23:19:34,377 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2021-11-02 23:19:34,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:19:34,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-02 23:19:34,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:19:34,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1304 backedges. 1 proven. 247 refuted. 0 times theorem prover too weak. 1056 trivial. 0 not checked. [2021-11-02 23:19:34,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788761076] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:34,925 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:19:34,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 16] total 49 [2021-11-02 23:19:34,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057692099] [2021-11-02 23:19:34,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-02 23:19:34,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:34,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-02 23:19:34,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=714, Invalid=1638, Unknown=0, NotChecked=0, Total=2352 [2021-11-02 23:19:34,928 INFO L87 Difference]: Start difference. First operand 172 states and 202 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 23:19:35,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:19:35,059 INFO L93 Difference]: Finished difference Result 290 states and 356 transitions. [2021-11-02 23:19:35,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-02 23:19:35,059 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 131 [2021-11-02 23:19:35,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:19:35,061 INFO L225 Difference]: With dead ends: 290 [2021-11-02 23:19:35,061 INFO L226 Difference]: Without dead ends: 185 [2021-11-02 23:19:35,062 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=714, Invalid=1638, Unknown=0, NotChecked=0, Total=2352 [2021-11-02 23:19:35,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-11-02 23:19:35,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 180. [2021-11-02 23:19:35,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.1843575418994414) internal successors, (212), 179 states have internal predecessors, (212), 0 states have call successors, (0), 0 states 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 23:19:35,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 212 transitions. [2021-11-02 23:19:35,073 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 212 transitions. Word has length 131 [2021-11-02 23:19:35,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:19:35,073 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 212 transitions. [2021-11-02 23:19:35,073 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 23:19:35,074 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 212 transitions. [2021-11-02 23:19:35,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-02 23:19:35,074 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:19:35,075 INFO L513 BasicCegarLoop]: trace histogram [33, 33, 14, 14, 14, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:19:35,100 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-11-02 23:19:35,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:35,278 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:19:35,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:35,278 INFO L85 PathProgramCache]: Analyzing trace with hash -978057361, now seen corresponding path program 24 times [2021-11-02 23:19:35,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:35,279 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920597558] [2021-11-02 23:19:35,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:35,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:35,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:35,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1409 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2021-11-02 23:19:35,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:35,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920597558] [2021-11-02 23:19:35,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920597558] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:35,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73237334] [2021-11-02 23:19:35,912 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:19:35,913 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:35,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:19:35,914 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:19:35,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-02 23:19:45,268 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2021-11-02 23:19:45,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:19:45,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-02 23:19:45,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:19:46,299 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-02 23:19:46,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 31 [2021-11-02 23:19:46,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1409 backedges. 1 proven. 193 refuted. 0 times theorem prover too weak. 1215 trivial. 0 not checked. [2021-11-02 23:19:46,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73237334] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:46,342 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:19:46,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 18] total 52 [2021-11-02 23:19:46,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536381452] [2021-11-02 23:19:46,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-02 23:19:46,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:46,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-02 23:19:46,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=679, Invalid=1973, Unknown=0, NotChecked=0, Total=2652 [2021-11-02 23:19:46,345 INFO L87 Difference]: Start difference. First operand 180 states and 212 transitions. Second operand has 52 states, 52 states have (on average 2.480769230769231) internal successors, (129), 52 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 23:19:47,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:19:47,148 INFO L93 Difference]: Finished difference Result 368 states and 456 transitions. [2021-11-02 23:19:47,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-11-02 23:19:47,149 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.480769230769231) internal successors, (129), 52 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) Word has length 136 [2021-11-02 23:19:47,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:19:47,151 INFO L225 Difference]: With dead ends: 368 [2021-11-02 23:19:47,151 INFO L226 Difference]: Without dead ends: 257 [2021-11-02 23:19:47,152 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=738, Invalid=3168, Unknown=0, NotChecked=0, Total=3906 [2021-11-02 23:19:47,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-11-02 23:19:47,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 186. [2021-11-02 23:19:47,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.1783783783783783) internal successors, (218), 185 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 23:19:47,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 218 transitions. [2021-11-02 23:19:47,163 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 218 transitions. Word has length 136 [2021-11-02 23:19:47,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:19:47,163 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 218 transitions. [2021-11-02 23:19:47,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.480769230769231) internal successors, (129), 52 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 23:19:47,164 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 218 transitions. [2021-11-02 23:19:47,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-02 23:19:47,165 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:19:47,165 INFO L513 BasicCegarLoop]: trace histogram [34, 34, 14, 14, 14, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:19:47,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-02 23:19:47,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-02 23:19:47,387 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:19:47,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:47,387 INFO L85 PathProgramCache]: Analyzing trace with hash 721596263, now seen corresponding path program 25 times [2021-11-02 23:19:47,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:47,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085281906] [2021-11-02 23:19:47,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:47,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:47,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:47,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1494 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2021-11-02 23:19:47,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:47,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085281906] [2021-11-02 23:19:47,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085281906] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:47,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037647681] [2021-11-02 23:19:47,930 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:19:47,930 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:47,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:19:47,931 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:19:47,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-02 23:19:48,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:48,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-02 23:19:48,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:19:49,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1494 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2021-11-02 23:19:49,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037647681] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:49,068 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:19:49,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-11-02 23:19:49,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315925281] [2021-11-02 23:19:49,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-02 23:19:49,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:49,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-02 23:19:49,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-11-02 23:19:49,070 INFO L87 Difference]: Start difference. First operand 186 states and 218 transitions. Second operand has 38 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 38 states have internal predecessors, (89), 0 states have call successors, (0), 0 states 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 23:19:49,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:19:49,166 INFO L93 Difference]: Finished difference Result 304 states and 368 transitions. [2021-11-02 23:19:49,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-02 23:19:49,166 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 38 states have internal predecessors, (89), 0 states have call successors, (0), 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 142 [2021-11-02 23:19:49,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:19:49,168 INFO L225 Difference]: With dead ends: 304 [2021-11-02 23:19:49,168 INFO L226 Difference]: Without dead ends: 189 [2021-11-02 23:19:49,169 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-11-02 23:19:49,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-11-02 23:19:49,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 188. [2021-11-02 23:19:49,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 1.1764705882352942) internal successors, (220), 187 states have internal predecessors, (220), 0 states have call successors, (0), 0 states 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 23:19:49,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 220 transitions. [2021-11-02 23:19:49,178 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 220 transitions. Word has length 142 [2021-11-02 23:19:49,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:19:49,179 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 220 transitions. [2021-11-02 23:19:49,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 38 states have internal predecessors, (89), 0 states have call successors, (0), 0 states 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 23:19:49,179 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 220 transitions. [2021-11-02 23:19:49,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-02 23:19:49,180 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:19:49,180 INFO L513 BasicCegarLoop]: trace histogram [35, 35, 14, 14, 14, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:19:49,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-02 23:19:49,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-02 23:19:49,406 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:19:49,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:49,406 INFO L85 PathProgramCache]: Analyzing trace with hash 548796649, now seen corresponding path program 26 times [2021-11-02 23:19:49,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:49,407 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150312907] [2021-11-02 23:19:49,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:49,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:49,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:50,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1563 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2021-11-02 23:19:50,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:50,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150312907] [2021-11-02 23:19:50,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150312907] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:50,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529175771] [2021-11-02 23:19:50,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:19:50,090 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:50,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:19:50,091 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:19:50,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-02 23:19:50,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:19:50,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:19:50,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-02 23:19:50,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:19:51,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1563 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2021-11-02 23:19:51,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529175771] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:51,275 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:19:51,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-11-02 23:19:51,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282499656] [2021-11-02 23:19:51,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-02 23:19:51,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:51,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-02 23:19:51,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-11-02 23:19:51,282 INFO L87 Difference]: Start difference. First operand 188 states and 220 transitions. Second operand has 39 states, 39 states have (on average 2.3333333333333335) internal successors, (91), 39 states have internal predecessors, (91), 0 states have call successors, (0), 0 states 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 23:19:51,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:19:51,394 INFO L93 Difference]: Finished difference Result 306 states and 370 transitions. [2021-11-02 23:19:51,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-02 23:19:51,394 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.3333333333333335) internal successors, (91), 39 states have internal predecessors, (91), 0 states have call successors, (0), 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 144 [2021-11-02 23:19:51,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:19:51,396 INFO L225 Difference]: With dead ends: 306 [2021-11-02 23:19:51,396 INFO L226 Difference]: Without dead ends: 191 [2021-11-02 23:19:51,396 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-11-02 23:19:51,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-11-02 23:19:51,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 190. [2021-11-02 23:19:51,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 1.1746031746031746) internal successors, (222), 189 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 23:19:51,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 222 transitions. [2021-11-02 23:19:51,403 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 222 transitions. Word has length 144 [2021-11-02 23:19:51,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:19:51,403 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 222 transitions. [2021-11-02 23:19:51,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.3333333333333335) internal successors, (91), 39 states have internal predecessors, (91), 0 states have call successors, (0), 0 states 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 23:19:51,403 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 222 transitions. [2021-11-02 23:19:51,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-02 23:19:51,404 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:19:51,404 INFO L513 BasicCegarLoop]: trace histogram [36, 36, 14, 14, 14, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:19:51,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-02 23:19:51,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-02 23:19:51,605 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:19:51,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:51,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1992092139, now seen corresponding path program 27 times [2021-11-02 23:19:51,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:51,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401451050] [2021-11-02 23:19:51,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:51,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:51,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:52,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1634 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2021-11-02 23:19:52,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:52,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401451050] [2021-11-02 23:19:52,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401451050] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:52,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117399274] [2021-11-02 23:19:52,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:19:52,176 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:52,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:19:52,177 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:19:52,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-02 23:19:53,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-11-02 23:19:53,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:19:53,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-02 23:19:53,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:19:53,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1634 backedges. 1 proven. 287 refuted. 0 times theorem prover too weak. 1346 trivial. 0 not checked. [2021-11-02 23:19:53,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117399274] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:53,756 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:19:53,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 17] total 54 [2021-11-02 23:19:53,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740630238] [2021-11-02 23:19:53,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-11-02 23:19:53,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:53,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-11-02 23:19:53,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=876, Invalid=1986, Unknown=0, NotChecked=0, Total=2862 [2021-11-02 23:19:53,758 INFO L87 Difference]: Start difference. First operand 190 states and 222 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 23:19:53,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:19:53,912 INFO L93 Difference]: Finished difference Result 318 states and 388 transitions. [2021-11-02 23:19:53,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-02 23:19:53,912 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 146 [2021-11-02 23:19:53,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:19:53,913 INFO L225 Difference]: With dead ends: 318 [2021-11-02 23:19:53,913 INFO L226 Difference]: Without dead ends: 203 [2021-11-02 23:19:53,914 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=876, Invalid=1986, Unknown=0, NotChecked=0, Total=2862 [2021-11-02 23:19:53,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-11-02 23:19:53,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 198. [2021-11-02 23:19:53,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 1.1776649746192893) internal successors, (232), 197 states have internal predecessors, (232), 0 states have call successors, (0), 0 states 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 23:19:53,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 232 transitions. [2021-11-02 23:19:53,922 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 232 transitions. Word has length 146 [2021-11-02 23:19:53,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:19:53,923 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 232 transitions. [2021-11-02 23:19:53,923 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 23:19:53,923 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 232 transitions. [2021-11-02 23:19:53,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-02 23:19:53,924 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:19:53,925 INFO L513 BasicCegarLoop]: trace histogram [37, 37, 15, 15, 15, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:19:53,951 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-11-02 23:19:54,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-02 23:19:54,134 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:19:54,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:54,135 INFO L85 PathProgramCache]: Analyzing trace with hash 592049329, now seen corresponding path program 28 times [2021-11-02 23:19:54,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:54,135 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087231633] [2021-11-02 23:19:54,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:54,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:54,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:54,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1750 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2021-11-02 23:19:54,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:54,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087231633] [2021-11-02 23:19:54,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087231633] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:54,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650040714] [2021-11-02 23:19:54,882 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:19:54,882 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:54,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:19:54,886 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:19:54,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-02 23:19:55,963 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:19:55,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:19:55,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-02 23:19:55,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:19:56,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1750 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2021-11-02 23:19:56,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650040714] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:56,315 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:19:56,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2021-11-02 23:19:56,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395679987] [2021-11-02 23:19:56,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-02 23:19:56,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:56,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-02 23:19:56,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-11-02 23:19:56,318 INFO L87 Difference]: Start difference. First operand 198 states and 232 transitions. Second operand has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 41 states have internal predecessors, (95), 0 states have call successors, (0), 0 states 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 23:19:56,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:19:56,416 INFO L93 Difference]: Finished difference Result 322 states and 390 transitions. [2021-11-02 23:19:56,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-02 23:19:56,417 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 41 states have internal predecessors, (95), 0 states have call successors, (0), 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 151 [2021-11-02 23:19:56,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:19:56,418 INFO L225 Difference]: With dead ends: 322 [2021-11-02 23:19:56,419 INFO L226 Difference]: Without dead ends: 201 [2021-11-02 23:19:56,419 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-11-02 23:19:56,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-11-02 23:19:56,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 200. [2021-11-02 23:19:56,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.1758793969849246) internal successors, (234), 199 states have internal predecessors, (234), 0 states have call successors, (0), 0 states 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 23:19:56,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 234 transitions. [2021-11-02 23:19:56,429 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 234 transitions. Word has length 151 [2021-11-02 23:19:56,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:19:56,429 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 234 transitions. [2021-11-02 23:19:56,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 41 states have internal predecessors, (95), 0 states have call successors, (0), 0 states 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 23:19:56,430 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 234 transitions. [2021-11-02 23:19:56,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-02 23:19:56,431 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:19:56,431 INFO L513 BasicCegarLoop]: trace histogram [38, 38, 15, 15, 15, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:19:56,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-02 23:19:56,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-02 23:19:56,658 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:19:56,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:56,658 INFO L85 PathProgramCache]: Analyzing trace with hash -444318353, now seen corresponding path program 29 times [2021-11-02 23:19:56,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:56,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55077840] [2021-11-02 23:19:56,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:56,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:56,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:57,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1825 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2021-11-02 23:19:57,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:57,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55077840] [2021-11-02 23:19:57,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55077840] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:57,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098072565] [2021-11-02 23:19:57,422 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:19:57,422 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:57,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:19:57,423 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:19:57,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-02 23:20:31,661 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 38 check-sat command(s) [2021-11-02 23:20:31,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:20:31,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-02 23:20:31,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:20:32,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1825 backedges. 1 proven. 330 refuted. 0 times theorem prover too weak. 1494 trivial. 0 not checked. [2021-11-02 23:20:32,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098072565] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:32,379 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:20:32,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 18] total 57 [2021-11-02 23:20:32,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13316163] [2021-11-02 23:20:32,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-11-02 23:20:32,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:32,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-11-02 23:20:32,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=972, Invalid=2220, Unknown=0, NotChecked=0, Total=3192 [2021-11-02 23:20:32,382 INFO L87 Difference]: Start difference. First operand 200 states and 234 transitions. Second operand has 57 states, 57 states have (on average 2.56140350877193) internal successors, (146), 57 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 23:20:32,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:32,571 INFO L93 Difference]: Finished difference Result 334 states and 408 transitions. [2021-11-02 23:20:32,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-11-02 23:20:32,572 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.56140350877193) internal successors, (146), 57 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 153 [2021-11-02 23:20:32,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:32,575 INFO L225 Difference]: With dead ends: 334 [2021-11-02 23:20:32,575 INFO L226 Difference]: Without dead ends: 213 [2021-11-02 23:20:32,576 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=972, Invalid=2220, Unknown=0, NotChecked=0, Total=3192 [2021-11-02 23:20:32,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-11-02 23:20:32,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 208. [2021-11-02 23:20:32,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 1.178743961352657) internal successors, (244), 207 states have internal predecessors, (244), 0 states have call successors, (0), 0 states 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 23:20:32,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 244 transitions. [2021-11-02 23:20:32,588 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 244 transitions. Word has length 153 [2021-11-02 23:20:32,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:32,589 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 244 transitions. [2021-11-02 23:20:32,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.56140350877193) internal successors, (146), 57 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 23:20:32,589 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 244 transitions. [2021-11-02 23:20:32,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-02 23:20:32,591 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:32,591 INFO L513 BasicCegarLoop]: trace histogram [39, 39, 16, 16, 16, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:32,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-02 23:20:32,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:32,810 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:20:32,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:32,810 INFO L85 PathProgramCache]: Analyzing trace with hash -2093752207, now seen corresponding path program 30 times [2021-11-02 23:20:32,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:32,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452159077] [2021-11-02 23:20:32,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:32,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:32,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:33,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1948 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 427 trivial. 0 not checked. [2021-11-02 23:20:33,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:33,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452159077] [2021-11-02 23:20:33,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452159077] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:33,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742294438] [2021-11-02 23:20:33,498 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:20:33,498 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:33,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:20:33,499 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:20:33,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-02 23:20:42,325 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2021-11-02 23:20:42,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:20:42,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-02 23:20:42,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:20:43,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1948 backedges. 78 proven. 376 refuted. 0 times theorem prover too weak. 1494 trivial. 0 not checked. [2021-11-02 23:20:43,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742294438] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:43,113 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:20:43,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 21] total 61 [2021-11-02 23:20:43,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072851007] [2021-11-02 23:20:43,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-11-02 23:20:43,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:43,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-11-02 23:20:43,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1116, Invalid=2544, Unknown=0, NotChecked=0, Total=3660 [2021-11-02 23:20:43,114 INFO L87 Difference]: Start difference. First operand 208 states and 244 transitions. Second operand has 61 states, 61 states have (on average 2.5081967213114753) internal successors, (153), 61 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 23:20:43,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:43,832 INFO L93 Difference]: Finished difference Result 349 states and 428 transitions. [2021-11-02 23:20:43,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-11-02 23:20:43,834 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.5081967213114753) internal successors, (153), 61 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 158 [2021-11-02 23:20:43,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:43,836 INFO L225 Difference]: With dead ends: 349 [2021-11-02 23:20:43,836 INFO L226 Difference]: Without dead ends: 222 [2021-11-02 23:20:43,837 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 833 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1456, Invalid=4550, Unknown=0, NotChecked=0, Total=6006 [2021-11-02 23:20:43,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-11-02 23:20:43,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 218. [2021-11-02 23:20:43,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 1.1797235023041475) internal successors, (256), 217 states have internal predecessors, (256), 0 states have call successors, (0), 0 states 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 23:20:43,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 256 transitions. [2021-11-02 23:20:43,849 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 256 transitions. Word has length 158 [2021-11-02 23:20:43,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:43,849 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 256 transitions. [2021-11-02 23:20:43,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.5081967213114753) internal successors, (153), 61 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 23:20:43,850 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 256 transitions. [2021-11-02 23:20:43,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-02 23:20:43,851 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:43,851 INFO L513 BasicCegarLoop]: trace histogram [41, 41, 17, 17, 17, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:43,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-02 23:20:44,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-11-02 23:20:44,067 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:20:44,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:44,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1709385943, now seen corresponding path program 31 times [2021-11-02 23:20:44,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:44,067 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708249139] [2021-11-02 23:20:44,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:44,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:44,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:44,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2157 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 476 trivial. 0 not checked. [2021-11-02 23:20:44,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:44,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708249139] [2021-11-02 23:20:44,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708249139] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:44,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748893432] [2021-11-02 23:20:44,830 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:20:44,830 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:44,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:20:44,831 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:20:44,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-02 23:20:45,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:45,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-02 23:20:45,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:20:46,263 INFO L134 CoverageAnalysis]: Checked inductivity of 2157 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 476 trivial. 0 not checked. [2021-11-02 23:20:46,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748893432] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:46,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:20:46,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2021-11-02 23:20:46,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658131002] [2021-11-02 23:20:46,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-02 23:20:46,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:46,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-02 23:20:46,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-11-02 23:20:46,266 INFO L87 Difference]: Start difference. First operand 218 states and 256 transitions. Second operand has 45 states, 45 states have (on average 2.2888888888888888) internal successors, (103), 45 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 23:20:46,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:46,363 INFO L93 Difference]: Finished difference Result 354 states and 430 transitions. [2021-11-02 23:20:46,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-02 23:20:46,370 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.2888888888888888) internal successors, (103), 45 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 165 [2021-11-02 23:20:46,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:46,372 INFO L225 Difference]: With dead ends: 354 [2021-11-02 23:20:46,372 INFO L226 Difference]: Without dead ends: 221 [2021-11-02 23:20:46,373 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-11-02 23:20:46,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-11-02 23:20:46,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 220. [2021-11-02 23:20:46,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 1.178082191780822) internal successors, (258), 219 states have internal predecessors, (258), 0 states have call successors, (0), 0 states 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 23:20:46,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 258 transitions. [2021-11-02 23:20:46,384 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 258 transitions. Word has length 165 [2021-11-02 23:20:46,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:46,385 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 258 transitions. [2021-11-02 23:20:46,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.2888888888888888) internal successors, (103), 45 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 23:20:46,385 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 258 transitions. [2021-11-02 23:20:46,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-11-02 23:20:46,386 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:46,386 INFO L513 BasicCegarLoop]: trace histogram [42, 42, 17, 17, 17, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:46,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-11-02 23:20:46,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:46,614 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:20:46,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:46,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1435630439, now seen corresponding path program 32 times [2021-11-02 23:20:46,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:46,615 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290853386] [2021-11-02 23:20:46,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:46,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:46,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:47,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2240 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 476 trivial. 0 not checked. [2021-11-02 23:20:47,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:47,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290853386] [2021-11-02 23:20:47,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290853386] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:47,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667424398] [2021-11-02 23:20:47,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:20:47,409 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:47,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:20:47,410 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:20:47,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-02 23:20:48,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:20:48,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:20:48,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-02 23:20:48,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:20:48,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2240 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 476 trivial. 0 not checked. [2021-11-02 23:20:48,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667424398] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:48,926 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:20:48,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2021-11-02 23:20:48,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475249501] [2021-11-02 23:20:48,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-02 23:20:48,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:48,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-02 23:20:48,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-11-02 23:20:48,929 INFO L87 Difference]: Start difference. First operand 220 states and 258 transitions. Second operand has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 46 states have internal predecessors, (105), 0 states have call successors, (0), 0 states 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 23:20:49,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:49,040 INFO L93 Difference]: Finished difference Result 356 states and 432 transitions. [2021-11-02 23:20:49,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-02 23:20:49,042 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 46 states have internal predecessors, (105), 0 states have call successors, (0), 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 23:20:49,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:49,044 INFO L225 Difference]: With dead ends: 356 [2021-11-02 23:20:49,044 INFO L226 Difference]: Without dead ends: 223 [2021-11-02 23:20:49,045 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-11-02 23:20:49,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-11-02 23:20:49,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 222. [2021-11-02 23:20:49,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 1.1764705882352942) internal successors, (260), 221 states have internal predecessors, (260), 0 states have call successors, (0), 0 states 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 23:20:49,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 260 transitions. [2021-11-02 23:20:49,055 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 260 transitions. Word has length 167 [2021-11-02 23:20:49,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:49,056 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 260 transitions. [2021-11-02 23:20:49,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 46 states have internal predecessors, (105), 0 states have call successors, (0), 0 states 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 23:20:49,056 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 260 transitions. [2021-11-02 23:20:49,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-02 23:20:49,057 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:49,057 INFO L513 BasicCegarLoop]: trace histogram [43, 43, 17, 17, 17, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:49,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-11-02 23:20:49,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:49,270 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:20:49,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:49,270 INFO L85 PathProgramCache]: Analyzing trace with hash 139397157, now seen corresponding path program 33 times [2021-11-02 23:20:49,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:49,271 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933611989] [2021-11-02 23:20:49,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:49,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:49,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:50,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2325 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 476 trivial. 0 not checked. [2021-11-02 23:20:50,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:50,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933611989] [2021-11-02 23:20:50,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933611989] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:50,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564999013] [2021-11-02 23:20:50,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:20:50,294 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:50,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:20:50,298 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:20:50,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-02 23:20:52,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2021-11-02 23:20:52,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:20:52,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-02 23:20:52,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:20:52,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2325 backedges. 86 proven. 425 refuted. 0 times theorem prover too weak. 1814 trivial. 0 not checked. [2021-11-02 23:20:52,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564999013] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:52,904 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:20:52,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 22] total 66 [2021-11-02 23:20:52,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759378406] [2021-11-02 23:20:52,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-11-02 23:20:52,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:52,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-11-02 23:20:52,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1317, Invalid=2973, Unknown=0, NotChecked=0, Total=4290 [2021-11-02 23:20:52,908 INFO L87 Difference]: Start difference. First operand 222 states and 260 transitions. Second operand has 66 states, 66 states have (on average 2.484848484848485) internal successors, (164), 66 states have internal predecessors, (164), 0 states have call successors, (0), 0 states 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 23:20:53,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:53,558 INFO L93 Difference]: Finished difference Result 369 states and 452 transitions. [2021-11-02 23:20:53,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-11-02 23:20:53,558 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.484848484848485) internal successors, (164), 66 states have internal predecessors, (164), 0 states have call successors, (0), 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 169 [2021-11-02 23:20:53,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:53,560 INFO L225 Difference]: With dead ends: 369 [2021-11-02 23:20:53,560 INFO L226 Difference]: Without dead ends: 236 [2021-11-02 23:20:53,562 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 963 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1695, Invalid=5277, Unknown=0, NotChecked=0, Total=6972 [2021-11-02 23:20:53,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-11-02 23:20:53,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 232. [2021-11-02 23:20:53,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 1.1774891774891776) internal successors, (272), 231 states have internal predecessors, (272), 0 states have call successors, (0), 0 states 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 23:20:53,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 272 transitions. [2021-11-02 23:20:53,573 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 272 transitions. Word has length 169 [2021-11-02 23:20:53,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:53,574 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 272 transitions. [2021-11-02 23:20:53,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.484848484848485) internal successors, (164), 66 states have internal predecessors, (164), 0 states have call successors, (0), 0 states 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 23:20:53,574 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 272 transitions. [2021-11-02 23:20:53,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-02 23:20:53,575 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:53,576 INFO L513 BasicCegarLoop]: trace histogram [45, 45, 18, 18, 18, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:53,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-11-02 23:20:53,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-11-02 23:20:53,790 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:20:53,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:53,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1396437123, now seen corresponding path program 34 times [2021-11-02 23:20:53,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:53,791 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765526311] [2021-11-02 23:20:53,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:53,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:53,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:54,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2553 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2021-11-02 23:20:54,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:54,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765526311] [2021-11-02 23:20:54,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765526311] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:54,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261901412] [2021-11-02 23:20:54,640 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:20:54,640 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:54,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:20:54,642 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:20:54,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-02 23:20:55,855 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:20:55,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:20:55,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-02 23:20:55,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:20:56,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2553 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2021-11-02 23:20:56,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261901412] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:56,300 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:20:56,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2021-11-02 23:20:56,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13821335] [2021-11-02 23:20:56,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-02 23:20:56,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:20:56,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-02 23:20:56,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-11-02 23:20:56,303 INFO L87 Difference]: Start difference. First operand 232 states and 272 transitions. Second operand has 49 states, 49 states have (on average 2.2653061224489797) internal successors, (111), 49 states have internal predecessors, (111), 0 states have call successors, (0), 0 states 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 23:20:56,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:20:56,426 INFO L93 Difference]: Finished difference Result 374 states and 454 transitions. [2021-11-02 23:20:56,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-02 23:20:56,430 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.2653061224489797) internal successors, (111), 49 states have internal predecessors, (111), 0 states have call successors, (0), 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 23:20:56,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:20:56,432 INFO L225 Difference]: With dead ends: 374 [2021-11-02 23:20:56,432 INFO L226 Difference]: Without dead ends: 235 [2021-11-02 23:20:56,433 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-11-02 23:20:56,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-11-02 23:20:56,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 234. [2021-11-02 23:20:56,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 1.1759656652360515) internal successors, (274), 233 states have internal predecessors, (274), 0 states have call successors, (0), 0 states 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 23:20:56,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 274 transitions. [2021-11-02 23:20:56,445 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 274 transitions. Word has length 176 [2021-11-02 23:20:56,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:20:56,445 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 274 transitions. [2021-11-02 23:20:56,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.2653061224489797) internal successors, (111), 49 states have internal predecessors, (111), 0 states have call successors, (0), 0 states 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 23:20:56,446 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 274 transitions. [2021-11-02 23:20:56,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-02 23:20:56,447 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:20:56,447 INFO L513 BasicCegarLoop]: trace histogram [46, 46, 18, 18, 18, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:20:56,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-11-02 23:20:56,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-11-02 23:20:56,662 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:20:56,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:20:56,662 INFO L85 PathProgramCache]: Analyzing trace with hash 2121693311, now seen corresponding path program 35 times [2021-11-02 23:20:56,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:20:56,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517060976] [2021-11-02 23:20:56,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:20:56,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:20:56,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:20:57,614 INFO L134 CoverageAnalysis]: Checked inductivity of 2644 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2021-11-02 23:20:57,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:20:57,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517060976] [2021-11-02 23:20:57,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517060976] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:20:57,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063944805] [2021-11-02 23:20:57,615 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:20:57,615 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:20:57,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:20:57,616 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:20:57,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-02 23:21:16,303 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2021-11-02 23:21:16,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:21:16,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-02 23:21:16,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:21:17,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2644 backedges. 1 proven. 477 refuted. 0 times theorem prover too weak. 2166 trivial. 0 not checked. [2021-11-02 23:21:17,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063944805] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:21:17,240 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:21:17,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 21] total 68 [2021-11-02 23:21:17,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142466893] [2021-11-02 23:21:17,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-11-02 23:21:17,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:21:17,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-11-02 23:21:17,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1385, Invalid=3171, Unknown=0, NotChecked=0, Total=4556 [2021-11-02 23:21:17,243 INFO L87 Difference]: Start difference. First operand 234 states and 274 transitions. Second operand has 68 states, 68 states have (on average 2.514705882352941) internal successors, (171), 68 states have internal predecessors, (171), 0 states have call successors, (0), 0 states 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 23:21:17,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:21:17,433 INFO L93 Difference]: Finished difference Result 386 states and 472 transitions. [2021-11-02 23:21:17,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-11-02 23:21:17,434 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.514705882352941) internal successors, (171), 68 states have internal predecessors, (171), 0 states have call successors, (0), 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 23:21:17,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:21:17,435 INFO L225 Difference]: With dead ends: 386 [2021-11-02 23:21:17,435 INFO L226 Difference]: Without dead ends: 247 [2021-11-02 23:21:17,436 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1385, Invalid=3171, Unknown=0, NotChecked=0, Total=4556 [2021-11-02 23:21:17,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-11-02 23:21:17,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 242. [2021-11-02 23:21:17,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 1.1784232365145229) internal successors, (284), 241 states have internal predecessors, (284), 0 states have call successors, (0), 0 states 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 23:21:17,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 284 transitions. [2021-11-02 23:21:17,448 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 284 transitions. Word has length 178 [2021-11-02 23:21:17,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:21:17,448 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 284 transitions. [2021-11-02 23:21:17,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.514705882352941) internal successors, (171), 68 states have internal predecessors, (171), 0 states have call successors, (0), 0 states 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 23:21:17,449 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 284 transitions. [2021-11-02 23:21:17,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-11-02 23:21:17,450 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:21:17,450 INFO L513 BasicCegarLoop]: trace histogram [47, 47, 19, 19, 19, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:21:17,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-11-02 23:21:17,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-11-02 23:21:17,674 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:21:17,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:21:17,674 INFO L85 PathProgramCache]: Analyzing trace with hash -226462307, now seen corresponding path program 36 times [2021-11-02 23:21:17,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:21:17,675 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797856681] [2021-11-02 23:21:17,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:21:17,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:21:17,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:21:18,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2792 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 583 trivial. 0 not checked. [2021-11-02 23:21:18,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:21:18,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797856681] [2021-11-02 23:21:18,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797856681] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:21:18,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533131036] [2021-11-02 23:21:18,693 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:21:18,693 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:21:18,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:21:18,694 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:21:18,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-11-02 23:21:34,356 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2021-11-02 23:21:34,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:21:34,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-02 23:21:34,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:21:35,774 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-02 23:21:35,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 31 [2021-11-02 23:21:35,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2792 backedges. 1 proven. 322 refuted. 0 times theorem prover too weak. 2469 trivial. 0 not checked. [2021-11-02 23:21:35,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533131036] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:21:35,814 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:21:35,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 20] total 68 [2021-11-02 23:21:35,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550990527] [2021-11-02 23:21:35,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-11-02 23:21:35,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:21:35,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-11-02 23:21:35,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1280, Invalid=3276, Unknown=0, NotChecked=0, Total=4556 [2021-11-02 23:21:35,815 INFO L87 Difference]: Start difference. First operand 242 states and 284 transitions. Second operand has 68 states, 68 states have (on average 2.411764705882353) internal successors, (164), 68 states have internal predecessors, (164), 0 states have call successors, (0), 0 states 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 23:21:36,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:21:36,914 INFO L93 Difference]: Finished difference Result 482 states and 596 transitions. [2021-11-02 23:21:36,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-11-02 23:21:36,914 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.411764705882353) internal successors, (164), 68 states have internal predecessors, (164), 0 states have call successors, (0), 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 183 [2021-11-02 23:21:36,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:21:36,916 INFO L225 Difference]: With dead ends: 482 [2021-11-02 23:21:36,917 INFO L226 Difference]: Without dead ends: 337 [2021-11-02 23:21:36,918 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 998 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1343, Invalid=4977, Unknown=0, NotChecked=0, Total=6320 [2021-11-02 23:21:36,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-11-02 23:21:36,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 248. [2021-11-02 23:21:36,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 1.174089068825911) internal successors, (290), 247 states have internal predecessors, (290), 0 states have call successors, (0), 0 states 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 23:21:36,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 290 transitions. [2021-11-02 23:21:36,930 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 290 transitions. Word has length 183 [2021-11-02 23:21:36,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:21:36,931 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 290 transitions. [2021-11-02 23:21:36,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.411764705882353) internal successors, (164), 68 states have internal predecessors, (164), 0 states have call successors, (0), 0 states 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 23:21:36,931 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 290 transitions. [2021-11-02 23:21:36,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-02 23:21:36,932 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:21:36,933 INFO L513 BasicCegarLoop]: trace histogram [48, 48, 19, 19, 19, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:21:36,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-11-02 23:21:37,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-11-02 23:21:37,150 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:21:37,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:21:37,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1407592879, now seen corresponding path program 37 times [2021-11-02 23:21:37,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:21:37,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391932] [2021-11-02 23:21:37,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:21:37,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:21:37,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:21:38,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2909 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2021-11-02 23:21:38,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:21:38,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391932] [2021-11-02 23:21:38,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391932] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:21:38,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702097002] [2021-11-02 23:21:38,309 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:21:38,309 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:21:38,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:21:38,310 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:21:38,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-11-02 23:21:39,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:21:39,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-02 23:21:39,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:21:40,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2909 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2021-11-02 23:21:40,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702097002] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:21:40,099 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:21:40,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2021-11-02 23:21:40,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880671312] [2021-11-02 23:21:40,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-02 23:21:40,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:21:40,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-02 23:21:40,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2021-11-02 23:21:40,101 INFO L87 Difference]: Start difference. First operand 248 states and 290 transitions. Second operand has 52 states, 52 states have (on average 2.25) internal successors, (117), 52 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 23:21:40,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:21:40,204 INFO L93 Difference]: Finished difference Result 400 states and 484 transitions. [2021-11-02 23:21:40,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-02 23:21:40,204 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.25) internal successors, (117), 52 states have internal predecessors, (117), 0 states have call successors, (0), 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 189 [2021-11-02 23:21:40,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:21:40,205 INFO L225 Difference]: With dead ends: 400 [2021-11-02 23:21:40,205 INFO L226 Difference]: Without dead ends: 251 [2021-11-02 23:21:40,206 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2021-11-02 23:21:40,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-11-02 23:21:40,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 250. [2021-11-02 23:21:40,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 1.1726907630522088) internal successors, (292), 249 states have internal predecessors, (292), 0 states have call successors, (0), 0 states 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 23:21:40,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 292 transitions. [2021-11-02 23:21:40,218 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 292 transitions. Word has length 189 [2021-11-02 23:21:40,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:21:40,218 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 292 transitions. [2021-11-02 23:21:40,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.25) internal successors, (117), 52 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 23:21:40,218 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 292 transitions. [2021-11-02 23:21:40,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-11-02 23:21:40,220 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:21:40,220 INFO L513 BasicCegarLoop]: trace histogram [49, 49, 19, 19, 19, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:21:40,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-11-02 23:21:40,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:21:40,434 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:21:40,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:21:40,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1729470607, now seen corresponding path program 38 times [2021-11-02 23:21:40,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:21:40,435 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385472284] [2021-11-02 23:21:40,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:21:40,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:21:40,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:21:41,560 INFO L134 CoverageAnalysis]: Checked inductivity of 3006 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2021-11-02 23:21:41,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:21:41,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385472284] [2021-11-02 23:21:41,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385472284] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:21:41,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56703081] [2021-11-02 23:21:41,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:21:41,561 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:21:41,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:21:41,561 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:21:41,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-11-02 23:21:42,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:21:42,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:21:42,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-02 23:21:42,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:21:43,486 INFO L134 CoverageAnalysis]: Checked inductivity of 3006 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2021-11-02 23:21:43,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56703081] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:21:43,486 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:21:43,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2021-11-02 23:21:43,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189366759] [2021-11-02 23:21:43,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-02 23:21:43,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:21:43,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-02 23:21:43,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-11-02 23:21:43,489 INFO L87 Difference]: Start difference. First operand 250 states and 292 transitions. Second operand has 53 states, 53 states have (on average 2.2452830188679247) internal successors, (119), 53 states have internal predecessors, (119), 0 states have call successors, (0), 0 states 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 23:21:43,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:21:43,640 INFO L93 Difference]: Finished difference Result 402 states and 486 transitions. [2021-11-02 23:21:43,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-02 23:21:43,640 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.2452830188679247) internal successors, (119), 53 states have internal predecessors, (119), 0 states have call successors, (0), 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 191 [2021-11-02 23:21:43,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:21:43,642 INFO L225 Difference]: With dead ends: 402 [2021-11-02 23:21:43,643 INFO L226 Difference]: Without dead ends: 253 [2021-11-02 23:21:43,643 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-11-02 23:21:43,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-11-02 23:21:43,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 252. [2021-11-02 23:21:43,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.1713147410358566) internal successors, (294), 251 states have internal predecessors, (294), 0 states have call successors, (0), 0 states 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 23:21:43,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 294 transitions. [2021-11-02 23:21:43,655 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 294 transitions. Word has length 191 [2021-11-02 23:21:43,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:21:43,656 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 294 transitions. [2021-11-02 23:21:43,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.2452830188679247) internal successors, (119), 53 states have internal predecessors, (119), 0 states have call successors, (0), 0 states 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 23:21:43,657 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 294 transitions. [2021-11-02 23:21:43,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-11-02 23:21:43,658 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:21:43,658 INFO L513 BasicCegarLoop]: trace histogram [50, 50, 19, 19, 19, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:21:43,697 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-11-02 23:21:43,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-11-02 23:21:43,882 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:21:43,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:21:43,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1380438861, now seen corresponding path program 39 times [2021-11-02 23:21:43,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:21:43,883 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567235060] [2021-11-02 23:21:43,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:21:43,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:21:43,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:21:44,918 INFO L134 CoverageAnalysis]: Checked inductivity of 3105 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2021-11-02 23:21:44,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:21:44,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567235060] [2021-11-02 23:21:44,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567235060] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:21:44,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006384728] [2021-11-02 23:21:44,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:21:44,919 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:21:44,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:21:44,921 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:21:44,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-11-02 23:21:46,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2021-11-02 23:21:46,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:21:46,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-02 23:21:46,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:21:47,782 INFO L134 CoverageAnalysis]: Checked inductivity of 3105 backedges. 100 proven. 532 refuted. 0 times theorem prover too weak. 2473 trivial. 0 not checked. [2021-11-02 23:21:47,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006384728] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:21:47,783 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:21:47,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 24] total 75 [2021-11-02 23:21:47,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192886549] [2021-11-02 23:21:47,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-11-02 23:21:47,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:21:47,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-11-02 23:21:47,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1715, Invalid=3835, Unknown=0, NotChecked=0, Total=5550 [2021-11-02 23:21:47,786 INFO L87 Difference]: Start difference. First operand 252 states and 294 transitions. Second operand has 75 states, 75 states have (on average 2.453333333333333) internal successors, (184), 75 states have internal predecessors, (184), 0 states have call successors, (0), 0 states 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 23:21:48,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:21:48,637 INFO L93 Difference]: Finished difference Result 415 states and 506 transitions. [2021-11-02 23:21:48,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-11-02 23:21:48,638 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.453333333333333) internal successors, (184), 75 states have internal predecessors, (184), 0 states have call successors, (0), 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 193 [2021-11-02 23:21:48,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:21:48,640 INFO L225 Difference]: With dead ends: 415 [2021-11-02 23:21:48,640 INFO L226 Difference]: Without dead ends: 266 [2021-11-02 23:21:48,641 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1230 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2175, Invalid=6755, Unknown=0, NotChecked=0, Total=8930 [2021-11-02 23:21:48,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-11-02 23:21:48,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 262. [2021-11-02 23:21:48,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 1.1724137931034482) internal successors, (306), 261 states have internal predecessors, (306), 0 states have call successors, (0), 0 states 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 23:21:48,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 306 transitions. [2021-11-02 23:21:48,653 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 306 transitions. Word has length 193 [2021-11-02 23:21:48,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:21:48,653 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 306 transitions. [2021-11-02 23:21:48,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.453333333333333) internal successors, (184), 75 states have internal predecessors, (184), 0 states have call successors, (0), 0 states 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 23:21:48,654 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 306 transitions. [2021-11-02 23:21:48,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-11-02 23:21:48,655 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:21:48,655 INFO L513 BasicCegarLoop]: trace histogram [52, 52, 20, 20, 20, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:21:48,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-11-02 23:21:48,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-11-02 23:21:48,866 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:21:48,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:21:48,866 INFO L85 PathProgramCache]: Analyzing trace with hash 420994817, now seen corresponding path program 40 times [2021-11-02 23:21:48,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:21:48,867 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505424963] [2021-11-02 23:21:48,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:21:48,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:21:48,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:21:50,123 INFO L134 CoverageAnalysis]: Checked inductivity of 3367 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 663 trivial. 0 not checked. [2021-11-02 23:21:50,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:21:50,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505424963] [2021-11-02 23:21:50,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505424963] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:21:50,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285465942] [2021-11-02 23:21:50,123 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:21:50,124 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:21:50,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:21:50,124 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:21:50,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-11-02 23:21:51,654 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:21:51,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:21:51,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-02 23:21:51,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:21:52,139 INFO L134 CoverageAnalysis]: Checked inductivity of 3367 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 663 trivial. 0 not checked. [2021-11-02 23:21:52,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285465942] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:21:52,139 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:21:52,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 56 [2021-11-02 23:21:52,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555603289] [2021-11-02 23:21:52,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-02 23:21:52,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:21:52,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-02 23:21:52,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2021-11-02 23:21:52,141 INFO L87 Difference]: Start difference. First operand 262 states and 306 transitions. Second operand has 56 states, 56 states have (on average 2.232142857142857) internal successors, (125), 56 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 23:21:52,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:21:52,264 INFO L93 Difference]: Finished difference Result 420 states and 508 transitions. [2021-11-02 23:21:52,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-11-02 23:21:52,265 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.232142857142857) internal successors, (125), 56 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) Word has length 200 [2021-11-02 23:21:52,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:21:52,266 INFO L225 Difference]: With dead ends: 420 [2021-11-02 23:21:52,266 INFO L226 Difference]: Without dead ends: 265 [2021-11-02 23:21:52,267 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2021-11-02 23:21:52,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-11-02 23:21:52,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 264. [2021-11-02 23:21:52,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 1.1711026615969582) internal successors, (308), 263 states have internal predecessors, (308), 0 states have call successors, (0), 0 states 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 23:21:52,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 308 transitions. [2021-11-02 23:21:52,281 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 308 transitions. Word has length 200 [2021-11-02 23:21:52,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:21:52,281 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 308 transitions. [2021-11-02 23:21:52,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.232142857142857) internal successors, (125), 56 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 23:21:52,282 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 308 transitions. [2021-11-02 23:21:52,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-11-02 23:21:52,283 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:21:52,284 INFO L513 BasicCegarLoop]: trace histogram [53, 53, 20, 20, 20, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:21:52,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-11-02 23:21:52,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:21:52,506 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:21:52,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:21:52,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1287643651, now seen corresponding path program 41 times [2021-11-02 23:21:52,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:21:52,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727954561] [2021-11-02 23:21:52,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:21:52,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:21:52,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:21:53,765 INFO L134 CoverageAnalysis]: Checked inductivity of 3472 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 663 trivial. 0 not checked. [2021-11-02 23:21:53,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:21:53,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727954561] [2021-11-02 23:21:53,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727954561] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:21:53,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545005723] [2021-11-02 23:21:53,766 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:21:53,766 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:21:53,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:21:53,774 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:21:53,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-11-02 23:22:53,268 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 53 check-sat command(s) [2021-11-02 23:22:53,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:22:53,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-02 23:22:53,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:22:54,537 INFO L134 CoverageAnalysis]: Checked inductivity of 3472 backedges. 1 proven. 590 refuted. 0 times theorem prover too weak. 2881 trivial. 0 not checked. [2021-11-02 23:22:54,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545005723] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:22:54,537 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:22:54,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 23] total 77 [2021-11-02 23:22:54,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162654800] [2021-11-02 23:22:54,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-11-02 23:22:54,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:22:54,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-11-02 23:22:54,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1792, Invalid=4060, Unknown=0, NotChecked=0, Total=5852 [2021-11-02 23:22:54,540 INFO L87 Difference]: Start difference. First operand 264 states and 308 transitions. Second operand has 77 states, 77 states have (on average 2.4805194805194803) internal successors, (191), 77 states have internal predecessors, (191), 0 states have call successors, (0), 0 states 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 23:22:54,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:22:54,883 INFO L93 Difference]: Finished difference Result 432 states and 526 transitions. [2021-11-02 23:22:54,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-11-02 23:22:54,884 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.4805194805194803) internal successors, (191), 77 states have internal predecessors, (191), 0 states have call successors, (0), 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 23:22:54,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:22:54,886 INFO L225 Difference]: With dead ends: 432 [2021-11-02 23:22:54,887 INFO L226 Difference]: Without dead ends: 277 [2021-11-02 23:22:54,888 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1113 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1792, Invalid=4060, Unknown=0, NotChecked=0, Total=5852 [2021-11-02 23:22:54,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-11-02 23:22:54,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 272. [2021-11-02 23:22:54,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 1.1734317343173433) internal successors, (318), 271 states have internal predecessors, (318), 0 states have call successors, (0), 0 states 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 23:22:54,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 318 transitions. [2021-11-02 23:22:54,902 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 318 transitions. Word has length 202 [2021-11-02 23:22:54,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:22:54,903 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 318 transitions. [2021-11-02 23:22:54,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.4805194805194803) internal successors, (191), 77 states have internal predecessors, (191), 0 states have call successors, (0), 0 states 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 23:22:54,903 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 318 transitions. [2021-11-02 23:22:54,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-11-02 23:22:54,905 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:22:54,905 INFO L513 BasicCegarLoop]: trace histogram [54, 54, 21, 21, 21, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:22:54,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-11-02 23:22:55,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:22:55,119 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:22:55,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:22:55,119 INFO L85 PathProgramCache]: Analyzing trace with hash 43297605, now seen corresponding path program 42 times [2021-11-02 23:22:55,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:22:55,119 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133975064] [2021-11-02 23:22:55,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:22:55,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:22:55,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:22:56,584 INFO L134 CoverageAnalysis]: Checked inductivity of 3640 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 724 trivial. 0 not checked. [2021-11-02 23:22:56,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:22:56,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133975064] [2021-11-02 23:22:56,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133975064] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:22:56,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339303956] [2021-11-02 23:22:56,585 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:22:56,585 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:22:56,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:22:56,585 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:22:56,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-11-02 23:23:27,694 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2021-11-02 23:23:27,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:23:27,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-02 23:23:27,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:23:29,142 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-02 23:23:29,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 31 [2021-11-02 23:23:29,183 INFO L134 CoverageAnalysis]: Checked inductivity of 3640 backedges. 1 proven. 422 refuted. 0 times theorem prover too weak. 3217 trivial. 0 not checked. [2021-11-02 23:23:29,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339303956] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:23:29,183 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:23:29,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 22] total 77 [2021-11-02 23:23:29,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630052589] [2021-11-02 23:23:29,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-11-02 23:23:29,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:23:29,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-11-02 23:23:29,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1657, Invalid=4195, Unknown=0, NotChecked=0, Total=5852 [2021-11-02 23:23:29,185 INFO L87 Difference]: Start difference. First operand 272 states and 318 transitions. Second operand has 77 states, 77 states have (on average 2.4025974025974026) internal successors, (185), 77 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 23:23:30,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:23:30,369 INFO L93 Difference]: Finished difference Result 537 states and 662 transitions. [2021-11-02 23:23:30,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-11-02 23:23:30,370 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.4025974025974026) internal successors, (185), 77 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 207 [2021-11-02 23:23:30,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:23:30,371 INFO L225 Difference]: With dead ends: 537 [2021-11-02 23:23:30,371 INFO L226 Difference]: Without dead ends: 376 [2021-11-02 23:23:30,372 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1263 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1724, Invalid=6286, Unknown=0, NotChecked=0, Total=8010 [2021-11-02 23:23:30,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-11-02 23:23:30,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 278. [2021-11-02 23:23:30,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 1.1696750902527075) internal successors, (324), 277 states have internal predecessors, (324), 0 states have call successors, (0), 0 states 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 23:23:30,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 324 transitions. [2021-11-02 23:23:30,386 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 324 transitions. Word has length 207 [2021-11-02 23:23:30,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:23:30,386 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 324 transitions. [2021-11-02 23:23:30,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.4025974025974026) internal successors, (185), 77 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 23:23:30,386 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 324 transitions. [2021-11-02 23:23:30,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2021-11-02 23:23:30,388 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:23:30,388 INFO L513 BasicCegarLoop]: trace histogram [55, 55, 21, 21, 21, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:23:30,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-11-02 23:23:30,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-11-02 23:23:30,602 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:23:30,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:23:30,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1498341895, now seen corresponding path program 43 times [2021-11-02 23:23:30,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:23:30,603 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515346053] [2021-11-02 23:23:30,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:23:30,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:23:30,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:23:31,865 INFO L134 CoverageAnalysis]: Checked inductivity of 3775 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 750 trivial. 0 not checked. [2021-11-02 23:23:31,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:23:31,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515346053] [2021-11-02 23:23:31,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515346053] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:23:31,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664204401] [2021-11-02 23:23:31,866 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:23:31,866 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:23:31,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:23:31,871 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:23:31,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-11-02 23:23:33,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:23:33,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 652 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-02 23:23:33,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:23:34,118 INFO L134 CoverageAnalysis]: Checked inductivity of 3775 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 750 trivial. 0 not checked. [2021-11-02 23:23:34,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664204401] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:23:34,119 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:23:34,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 59 [2021-11-02 23:23:34,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929926328] [2021-11-02 23:23:34,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-11-02 23:23:34,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:23:34,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-11-02 23:23:34,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2021-11-02 23:23:34,121 INFO L87 Difference]: Start difference. First operand 278 states and 324 transitions. Second operand has 59 states, 59 states have (on average 2.2203389830508473) internal successors, (131), 59 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:23:34,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:23:34,238 INFO L93 Difference]: Finished difference Result 446 states and 538 transitions. [2021-11-02 23:23:34,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-11-02 23:23:34,239 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.2203389830508473) internal successors, (131), 59 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 213 [2021-11-02 23:23:34,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:23:34,240 INFO L225 Difference]: With dead ends: 446 [2021-11-02 23:23:34,240 INFO L226 Difference]: Without dead ends: 281 [2021-11-02 23:23:34,240 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2021-11-02 23:23:34,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-11-02 23:23:34,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 280. [2021-11-02 23:23:34,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 1.168458781362007) internal successors, (326), 279 states have internal predecessors, (326), 0 states have call successors, (0), 0 states 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 23:23:34,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 326 transitions. [2021-11-02 23:23:34,249 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 326 transitions. Word has length 213 [2021-11-02 23:23:34,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:23:34,250 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 326 transitions. [2021-11-02 23:23:34,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.2203389830508473) internal successors, (131), 59 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:23:34,250 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 326 transitions. [2021-11-02 23:23:34,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-11-02 23:23:34,251 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:23:34,251 INFO L513 BasicCegarLoop]: trace histogram [56, 56, 21, 21, 21, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:23:34,276 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2021-11-02 23:23:34,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-11-02 23:23:34,454 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:23:34,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:23:34,454 INFO L85 PathProgramCache]: Analyzing trace with hash 18976311, now seen corresponding path program 44 times [2021-11-02 23:23:34,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:23:34,455 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958734324] [2021-11-02 23:23:34,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:23:34,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:23:34,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:23:35,995 INFO L134 CoverageAnalysis]: Checked inductivity of 3886 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 750 trivial. 0 not checked. [2021-11-02 23:23:35,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:23:35,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958734324] [2021-11-02 23:23:35,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958734324] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:23:35,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809101025] [2021-11-02 23:23:35,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:23:35,995 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:23:35,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:23:35,996 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:23:35,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-11-02 23:23:37,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:23:37,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:23:37,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 658 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-02 23:23:37,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:23:38,190 INFO L134 CoverageAnalysis]: Checked inductivity of 3886 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 750 trivial. 0 not checked. [2021-11-02 23:23:38,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809101025] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:23:38,190 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:23:38,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 60 [2021-11-02 23:23:38,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127850060] [2021-11-02 23:23:38,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-11-02 23:23:38,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:23:38,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-11-02 23:23:38,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2021-11-02 23:23:38,196 INFO L87 Difference]: Start difference. First operand 280 states and 326 transitions. Second operand has 60 states, 60 states have (on average 2.216666666666667) internal successors, (133), 60 states have internal predecessors, (133), 0 states have call successors, (0), 0 states 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 23:23:38,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:23:38,352 INFO L93 Difference]: Finished difference Result 448 states and 540 transitions. [2021-11-02 23:23:38,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-11-02 23:23:38,352 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.216666666666667) internal successors, (133), 60 states have internal predecessors, (133), 0 states have call successors, (0), 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 215 [2021-11-02 23:23:38,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:23:38,353 INFO L225 Difference]: With dead ends: 448 [2021-11-02 23:23:38,353 INFO L226 Difference]: Without dead ends: 283 [2021-11-02 23:23:38,354 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2021-11-02 23:23:38,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-11-02 23:23:38,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 282. [2021-11-02 23:23:38,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 1.1672597864768683) internal successors, (328), 281 states have internal predecessors, (328), 0 states have call successors, (0), 0 states 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 23:23:38,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 328 transitions. [2021-11-02 23:23:38,367 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 328 transitions. Word has length 215 [2021-11-02 23:23:38,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:23:38,367 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 328 transitions. [2021-11-02 23:23:38,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.216666666666667) internal successors, (133), 60 states have internal predecessors, (133), 0 states have call successors, (0), 0 states 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 23:23:38,368 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 328 transitions. [2021-11-02 23:23:38,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2021-11-02 23:23:38,369 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:23:38,370 INFO L513 BasicCegarLoop]: trace histogram [57, 57, 21, 21, 21, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:23:38,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-11-02 23:23:38,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:23:38,586 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:23:38,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:23:38,587 INFO L85 PathProgramCache]: Analyzing trace with hash -2127108363, now seen corresponding path program 45 times [2021-11-02 23:23:38,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:23:38,587 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483255773] [2021-11-02 23:23:38,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:23:38,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:23:38,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:23:40,129 INFO L134 CoverageAnalysis]: Checked inductivity of 3999 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 750 trivial. 0 not checked. [2021-11-02 23:23:40,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:23:40,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483255773] [2021-11-02 23:23:40,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483255773] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:23:40,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139774261] [2021-11-02 23:23:40,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:23:40,130 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:23:40,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:23:40,131 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:23:40,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-11-02 23:23:43,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2021-11-02 23:23:43,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:23:43,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-02 23:23:43,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:23:44,112 INFO L134 CoverageAnalysis]: Checked inductivity of 3999 backedges. 114 proven. 651 refuted. 0 times theorem prover too weak. 3234 trivial. 0 not checked. [2021-11-02 23:23:44,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139774261] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:23:44,112 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:23:44,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 26] total 84 [2021-11-02 23:23:44,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717099710] [2021-11-02 23:23:44,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2021-11-02 23:23:44,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:23:44,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-11-02 23:23:44,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2166, Invalid=4806, Unknown=0, NotChecked=0, Total=6972 [2021-11-02 23:23:44,115 INFO L87 Difference]: Start difference. First operand 282 states and 328 transitions. Second operand has 84 states, 84 states have (on average 2.4285714285714284) internal successors, (204), 84 states have internal predecessors, (204), 0 states have call successors, (0), 0 states 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 23:23:45,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:23:45,156 INFO L93 Difference]: Finished difference Result 461 states and 560 transitions. [2021-11-02 23:23:45,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-11-02 23:23:45,157 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.4285714285714284) internal successors, (204), 84 states have internal predecessors, (204), 0 states have call successors, (0), 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 217 [2021-11-02 23:23:45,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:23:45,158 INFO L225 Difference]: With dead ends: 461 [2021-11-02 23:23:45,158 INFO L226 Difference]: Without dead ends: 296 [2021-11-02 23:23:45,159 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1529 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2716, Invalid=8414, Unknown=0, NotChecked=0, Total=11130 [2021-11-02 23:23:45,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-11-02 23:23:45,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 292. [2021-11-02 23:23:45,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 1.168384879725086) internal successors, (340), 291 states have internal predecessors, (340), 0 states have call successors, (0), 0 states 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 23:23:45,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 340 transitions. [2021-11-02 23:23:45,170 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 340 transitions. Word has length 217 [2021-11-02 23:23:45,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:23:45,170 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 340 transitions. [2021-11-02 23:23:45,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.4285714285714284) internal successors, (204), 84 states have internal predecessors, (204), 0 states have call successors, (0), 0 states 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 23:23:45,171 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 340 transitions. [2021-11-02 23:23:45,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-11-02 23:23:45,172 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:23:45,172 INFO L513 BasicCegarLoop]: trace histogram [59, 59, 22, 22, 22, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:23:45,206 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2021-11-02 23:23:45,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:23:45,373 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:23:45,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:23:45,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1436737541, now seen corresponding path program 46 times [2021-11-02 23:23:45,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:23:45,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496450056] [2021-11-02 23:23:45,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:23:45,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:23:45,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:23:46,995 INFO L134 CoverageAnalysis]: Checked inductivity of 4295 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 814 trivial. 0 not checked. [2021-11-02 23:23:46,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:23:46,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496450056] [2021-11-02 23:23:46,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496450056] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:23:46,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294507046] [2021-11-02 23:23:46,995 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:23:46,995 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:23:46,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:23:46,996 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:23:46,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-11-02 23:23:49,321 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:23:49,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:23:49,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 684 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-02 23:23:49,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:23:49,844 INFO L134 CoverageAnalysis]: Checked inductivity of 4295 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 814 trivial. 0 not checked. [2021-11-02 23:23:49,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294507046] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:23:49,844 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:23:49,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 63 [2021-11-02 23:23:49,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941186350] [2021-11-02 23:23:49,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-02 23:23:49,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:23:49,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-02 23:23:49,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2021-11-02 23:23:49,846 INFO L87 Difference]: Start difference. First operand 292 states and 340 transitions. Second operand has 63 states, 63 states have (on average 2.2063492063492065) internal successors, (139), 63 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 23:23:49,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:23:49,974 INFO L93 Difference]: Finished difference Result 466 states and 562 transitions. [2021-11-02 23:23:49,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-11-02 23:23:49,974 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.2063492063492065) internal successors, (139), 63 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 224 [2021-11-02 23:23:49,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:23:49,976 INFO L225 Difference]: With dead ends: 466 [2021-11-02 23:23:49,976 INFO L226 Difference]: Without dead ends: 295 [2021-11-02 23:23:49,976 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2021-11-02 23:23:49,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-11-02 23:23:49,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 294. [2021-11-02 23:23:49,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 1.1672354948805461) internal successors, (342), 293 states have internal predecessors, (342), 0 states have call successors, (0), 0 states 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 23:23:49,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 342 transitions. [2021-11-02 23:23:49,990 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 342 transitions. Word has length 224 [2021-11-02 23:23:49,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:23:49,990 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 342 transitions. [2021-11-02 23:23:49,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.2063492063492065) internal successors, (139), 63 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 23:23:49,990 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 342 transitions. [2021-11-02 23:23:49,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-11-02 23:23:49,992 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:23:49,992 INFO L513 BasicCegarLoop]: trace histogram [60, 60, 22, 22, 22, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:23:50,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-11-02 23:23:50,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-11-02 23:23:50,202 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:23:50,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:23:50,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1433240313, now seen corresponding path program 47 times [2021-11-02 23:23:50,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:23:50,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712546313] [2021-11-02 23:23:50,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:23:50,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:23:50,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:23:51,610 INFO L134 CoverageAnalysis]: Checked inductivity of 4414 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 814 trivial. 0 not checked. [2021-11-02 23:23:51,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:23:51,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712546313] [2021-11-02 23:23:51,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712546313] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:23:51,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363505487] [2021-11-02 23:23:51,610 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:23:51,610 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:23:51,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:23:51,611 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:23:51,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-11-02 23:25:13,994 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2021-11-02 23:25:13,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:25:14,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 635 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-02 23:25:14,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:25:15,270 INFO L134 CoverageAnalysis]: Checked inductivity of 4414 backedges. 1 proven. 715 refuted. 0 times theorem prover too weak. 3698 trivial. 0 not checked. [2021-11-02 23:25:15,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363505487] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:25:15,272 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:25:15,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 25] total 86 [2021-11-02 23:25:15,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132266689] [2021-11-02 23:25:15,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2021-11-02 23:25:15,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:25:15,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-11-02 23:25:15,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2252, Invalid=5058, Unknown=0, NotChecked=0, Total=7310 [2021-11-02 23:25:15,273 INFO L87 Difference]: Start difference. First operand 294 states and 342 transitions. Second operand has 86 states, 86 states have (on average 2.453488372093023) internal successors, (211), 86 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 23:25:15,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:25:15,495 INFO L93 Difference]: Finished difference Result 478 states and 580 transitions. [2021-11-02 23:25:15,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-11-02 23:25:15,496 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.453488372093023) internal successors, (211), 86 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 226 [2021-11-02 23:25:15,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:25:15,497 INFO L225 Difference]: With dead ends: 478 [2021-11-02 23:25:15,497 INFO L226 Difference]: Without dead ends: 307 [2021-11-02 23:25:15,498 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1380 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2252, Invalid=5058, Unknown=0, NotChecked=0, Total=7310 [2021-11-02 23:25:15,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-11-02 23:25:15,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 302. [2021-11-02 23:25:15,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 1.169435215946844) internal successors, (352), 301 states have internal predecessors, (352), 0 states have call successors, (0), 0 states 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 23:25:15,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 352 transitions. [2021-11-02 23:25:15,510 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 352 transitions. Word has length 226 [2021-11-02 23:25:15,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:25:15,510 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 352 transitions. [2021-11-02 23:25:15,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.453488372093023) internal successors, (211), 86 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 23:25:15,510 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 352 transitions. [2021-11-02 23:25:15,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2021-11-02 23:25:15,511 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:25:15,511 INFO L513 BasicCegarLoop]: trace histogram [61, 61, 23, 23, 23, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:25:15,554 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2021-11-02 23:25:15,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-11-02 23:25:15,712 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:25:15,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:25:15,712 INFO L85 PathProgramCache]: Analyzing trace with hash 549620077, now seen corresponding path program 48 times [2021-11-02 23:25:15,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:25:15,712 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169919059] [2021-11-02 23:25:15,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:25:15,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:25:15,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:25:17,163 INFO L134 CoverageAnalysis]: Checked inductivity of 4602 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 881 trivial. 0 not checked. [2021-11-02 23:25:17,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:25:17,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169919059] [2021-11-02 23:25:17,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169919059] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:25:17,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264675536] [2021-11-02 23:25:17,163 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:25:17,163 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:25:17,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:25:17,164 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:25:17,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-11-02 23:26:26,510 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2021-11-02 23:26:26,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:26:26,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 626 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-02 23:26:26,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:26:27,959 INFO L134 CoverageAnalysis]: Checked inductivity of 4602 backedges. 1 proven. 782 refuted. 0 times theorem prover too weak. 3819 trivial. 0 not checked. [2021-11-02 23:26:27,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264675536] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:26:27,959 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:26:27,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 26] total 88 [2021-11-02 23:26:27,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757934197] [2021-11-02 23:26:27,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2021-11-02 23:26:27,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:26:27,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-11-02 23:26:27,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2340, Invalid=5316, Unknown=0, NotChecked=0, Total=7656 [2021-11-02 23:26:27,961 INFO L87 Difference]: Start difference. First operand 302 states and 352 transitions. Second operand has 88 states, 88 states have (on average 2.4545454545454546) internal successors, (216), 88 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 23:26:28,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:26:28,364 INFO L93 Difference]: Finished difference Result 492 states and 598 transitions. [2021-11-02 23:26:28,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-11-02 23:26:28,365 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.4545454545454546) internal successors, (216), 88 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 231 [2021-11-02 23:26:28,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:26:28,367 INFO L225 Difference]: With dead ends: 492 [2021-11-02 23:26:28,367 INFO L226 Difference]: Without dead ends: 315 [2021-11-02 23:26:28,368 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1464 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2340, Invalid=5316, Unknown=0, NotChecked=0, Total=7656 [2021-11-02 23:26:28,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-11-02 23:26:28,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 310. [2021-11-02 23:26:28,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 1.1715210355987056) internal successors, (362), 309 states have internal predecessors, (362), 0 states have call successors, (0), 0 states 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 23:26:28,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 362 transitions. [2021-11-02 23:26:28,386 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 362 transitions. Word has length 231 [2021-11-02 23:26:28,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:26:28,386 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 362 transitions. [2021-11-02 23:26:28,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.4545454545454546) internal successors, (216), 88 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 23:26:28,387 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 362 transitions. [2021-11-02 23:26:28,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-11-02 23:26:28,389 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:26:28,389 INFO L513 BasicCegarLoop]: trace histogram [62, 62, 24, 24, 24, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:26:28,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-11-02 23:26:28,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:26:28,602 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:26:28,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:26:28,602 INFO L85 PathProgramCache]: Analyzing trace with hash 253356427, now seen corresponding path program 49 times [2021-11-02 23:26:28,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:26:28,603 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497337130] [2021-11-02 23:26:28,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:26:28,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:26:28,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:26:30,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4795 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 951 trivial. 0 not checked. [2021-11-02 23:26:30,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:26:30,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497337130] [2021-11-02 23:26:30,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497337130] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:26:30,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058468136] [2021-11-02 23:26:30,389 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:26:30,389 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:26:30,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:26:30,390 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:26:30,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-11-02 23:26:32,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:26:32,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 718 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-02 23:26:32,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:26:33,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4795 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 951 trivial. 0 not checked. [2021-11-02 23:26:33,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058468136] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:26:33,500 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:26:33,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 66 [2021-11-02 23:26:33,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401757653] [2021-11-02 23:26:33,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-11-02 23:26:33,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:26:33,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-11-02 23:26:33,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2021-11-02 23:26:33,502 INFO L87 Difference]: Start difference. First operand 310 states and 362 transitions. Second operand has 66 states, 66 states have (on average 2.196969696969697) internal successors, (145), 66 states have internal predecessors, (145), 0 states have call successors, (0), 0 states 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 23:26:33,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:26:33,677 INFO L93 Difference]: Finished difference Result 496 states and 600 transitions. [2021-11-02 23:26:33,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-11-02 23:26:33,678 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.196969696969697) internal successors, (145), 66 states have internal predecessors, (145), 0 states have call successors, (0), 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 236 [2021-11-02 23:26:33,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:26:33,679 INFO L225 Difference]: With dead ends: 496 [2021-11-02 23:26:33,679 INFO L226 Difference]: Without dead ends: 313 [2021-11-02 23:26:33,680 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2021-11-02 23:26:33,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-11-02 23:26:33,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 312. [2021-11-02 23:26:33,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 1.1704180064308682) internal successors, (364), 311 states have internal predecessors, (364), 0 states have call successors, (0), 0 states 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 23:26:33,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 364 transitions. [2021-11-02 23:26:33,697 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 364 transitions. Word has length 236 [2021-11-02 23:26:33,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:26:33,697 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 364 transitions. [2021-11-02 23:26:33,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.196969696969697) internal successors, (145), 66 states have internal predecessors, (145), 0 states have call successors, (0), 0 states 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 23:26:33,698 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 364 transitions. [2021-11-02 23:26:33,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-11-02 23:26:33,700 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:26:33,700 INFO L513 BasicCegarLoop]: trace histogram [63, 63, 24, 24, 24, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:26:33,748 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2021-11-02 23:26:33,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-11-02 23:26:33,914 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:26:33,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:26:33,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1383328883, now seen corresponding path program 50 times [2021-11-02 23:26:33,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:26:33,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124389190] [2021-11-02 23:26:33,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:26:33,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:26:34,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:26:35,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4920 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 951 trivial. 0 not checked. [2021-11-02 23:26:35,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:26:35,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124389190] [2021-11-02 23:26:35,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124389190] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:26:35,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653676607] [2021-11-02 23:26:35,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:26:35,783 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:26:35,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:26:35,784 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:26:35,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-11-02 23:26:38,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:26:38,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:26:38,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 724 conjuncts, 65 conjunts are in the unsatisfiable core [2021-11-02 23:26:38,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:26:39,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4920 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 951 trivial. 0 not checked. [2021-11-02 23:26:39,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653676607] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:26:39,090 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:26:39,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 67 [2021-11-02 23:26:39,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136981794] [2021-11-02 23:26:39,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-11-02 23:26:39,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:26:39,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-11-02 23:26:39,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2021-11-02 23:26:39,092 INFO L87 Difference]: Start difference. First operand 312 states and 364 transitions. Second operand has 67 states, 67 states have (on average 2.1940298507462686) internal successors, (147), 67 states have internal predecessors, (147), 0 states have call successors, (0), 0 states 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 23:26:39,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:26:39,294 INFO L93 Difference]: Finished difference Result 498 states and 602 transitions. [2021-11-02 23:26:39,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-11-02 23:26:39,295 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.1940298507462686) internal successors, (147), 67 states have internal predecessors, (147), 0 states have call successors, (0), 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 238 [2021-11-02 23:26:39,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:26:39,296 INFO L225 Difference]: With dead ends: 498 [2021-11-02 23:26:39,296 INFO L226 Difference]: Without dead ends: 315 [2021-11-02 23:26:39,297 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2021-11-02 23:26:39,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-11-02 23:26:39,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 314. [2021-11-02 23:26:39,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 1.1693290734824282) internal successors, (366), 313 states have internal predecessors, (366), 0 states have call successors, (0), 0 states 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 23:26:39,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 366 transitions. [2021-11-02 23:26:39,309 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 366 transitions. Word has length 238 [2021-11-02 23:26:39,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:26:39,309 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 366 transitions. [2021-11-02 23:26:39,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.1940298507462686) internal successors, (147), 67 states have internal predecessors, (147), 0 states have call successors, (0), 0 states 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 23:26:39,309 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 366 transitions. [2021-11-02 23:26:39,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-11-02 23:26:39,311 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:26:39,311 INFO L513 BasicCegarLoop]: trace histogram [64, 64, 24, 24, 24, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:26:39,353 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2021-11-02 23:26:39,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:26:39,526 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:26:39,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:26:39,526 INFO L85 PathProgramCache]: Analyzing trace with hash 2015085839, now seen corresponding path program 51 times [2021-11-02 23:26:39,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:26:39,527 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662047567] [2021-11-02 23:26:39,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:26:39,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:26:39,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:26:41,710 INFO L134 CoverageAnalysis]: Checked inductivity of 5047 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 951 trivial. 0 not checked. [2021-11-02 23:26:41,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:26:41,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662047567] [2021-11-02 23:26:41,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662047567] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:26:41,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525076617] [2021-11-02 23:26:41,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:26:41,711 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:26:41,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:26:41,712 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:26:41,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-11-02 23:26:46,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2021-11-02 23:26:46,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:26:46,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-02 23:26:46,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:26:48,505 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-02 23:26:48,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 31 [2021-11-02 23:26:48,552 INFO L134 CoverageAnalysis]: Checked inductivity of 5047 backedges. 1 proven. 558 refuted. 0 times theorem prover too weak. 4488 trivial. 0 not checked. [2021-11-02 23:26:48,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525076617] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:26:48,552 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:26:48,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 24] total 89 [2021-11-02 23:26:48,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883141719] [2021-11-02 23:26:48,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2021-11-02 23:26:48,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:26:48,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-11-02 23:26:48,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=5554, Unknown=0, NotChecked=0, Total=7832 [2021-11-02 23:26:48,555 INFO L87 Difference]: Start difference. First operand 314 states and 366 transitions. Second operand has 89 states, 89 states have (on average 2.3820224719101124) internal successors, (212), 89 states have internal predecessors, (212), 0 states have call successors, (0), 0 states 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 23:26:49,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:26:49,883 INFO L93 Difference]: Finished difference Result 613 states and 754 transitions. [2021-11-02 23:26:49,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-11-02 23:26:49,884 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.3820224719101124) internal successors, (212), 89 states have internal predecessors, (212), 0 states have call successors, (0), 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 240 [2021-11-02 23:26:49,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:26:49,886 INFO L225 Difference]: With dead ends: 613 [2021-11-02 23:26:49,886 INFO L226 Difference]: Without dead ends: 430 [2021-11-02 23:26:49,887 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1625 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2349, Invalid=8157, Unknown=0, NotChecked=0, Total=10506 [2021-11-02 23:26:49,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-11-02 23:26:49,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 320. [2021-11-02 23:26:49,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 1.1661442006269593) internal successors, (372), 319 states have internal predecessors, (372), 0 states have call successors, (0), 0 states 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 23:26:49,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 372 transitions. [2021-11-02 23:26:49,897 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 372 transitions. Word has length 240 [2021-11-02 23:26:49,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:26:49,898 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 372 transitions. [2021-11-02 23:26:49,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.3820224719101124) internal successors, (212), 89 states have internal predecessors, (212), 0 states have call successors, (0), 0 states 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 23:26:49,898 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 372 transitions. [2021-11-02 23:26:49,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2021-11-02 23:26:49,900 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:26:49,900 INFO L513 BasicCegarLoop]: trace histogram [65, 65, 24, 24, 24, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:26:49,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-11-02 23:26:50,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:26:50,126 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:26:50,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:26:50,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1135076103, now seen corresponding path program 52 times [2021-11-02 23:26:50,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:26:50,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663025566] [2021-11-02 23:26:50,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:26:50,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:26:50,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:26:51,710 INFO L134 CoverageAnalysis]: Checked inductivity of 5206 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 981 trivial. 0 not checked. [2021-11-02 23:26:51,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:26:51,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663025566] [2021-11-02 23:26:51,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663025566] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:26:51,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241218196] [2021-11-02 23:26:51,711 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:26:51,711 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:26:51,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:26:51,717 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:26:51,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-11-02 23:26:54,119 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:26:54,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:26:54,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 67 conjunts are in the unsatisfiable core [2021-11-02 23:26:54,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:26:54,629 INFO L134 CoverageAnalysis]: Checked inductivity of 5206 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 981 trivial. 0 not checked. [2021-11-02 23:26:54,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241218196] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:26:54,629 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:26:54,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 69 [2021-11-02 23:26:54,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521454022] [2021-11-02 23:26:54,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-11-02 23:26:54,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:26:54,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-11-02 23:26:54,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2021-11-02 23:26:54,631 INFO L87 Difference]: Start difference. First operand 320 states and 372 transitions. Second operand has 69 states, 69 states have (on average 2.1884057971014492) internal successors, (151), 69 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 23:26:54,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:26:54,788 INFO L93 Difference]: Finished difference Result 510 states and 614 transitions. [2021-11-02 23:26:54,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-11-02 23:26:54,789 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.1884057971014492) internal successors, (151), 69 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) Word has length 246 [2021-11-02 23:26:54,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:26:54,790 INFO L225 Difference]: With dead ends: 510 [2021-11-02 23:26:54,790 INFO L226 Difference]: Without dead ends: 323 [2021-11-02 23:26:54,791 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2021-11-02 23:26:54,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-11-02 23:26:54,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 322. [2021-11-02 23:26:54,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 1.1651090342679127) internal successors, (374), 321 states have internal predecessors, (374), 0 states have call successors, (0), 0 states 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 23:26:54,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 374 transitions. [2021-11-02 23:26:54,808 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 374 transitions. Word has length 246 [2021-11-02 23:26:54,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:26:54,808 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 374 transitions. [2021-11-02 23:26:54,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.1884057971014492) internal successors, (151), 69 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 23:26:54,809 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 374 transitions. [2021-11-02 23:26:54,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2021-11-02 23:26:54,810 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:26:54,811 INFO L513 BasicCegarLoop]: trace histogram [66, 66, 24, 24, 24, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:26:54,856 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2021-11-02 23:26:55,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-11-02 23:26:55,038 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:26:55,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:26:55,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1430850935, now seen corresponding path program 53 times [2021-11-02 23:26:55,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:26:55,039 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469398913] [2021-11-02 23:26:55,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:26:55,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:26:55,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:26:56,846 INFO L134 CoverageAnalysis]: Checked inductivity of 5337 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 981 trivial. 0 not checked. [2021-11-02 23:26:56,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:26:56,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469398913] [2021-11-02 23:26:56,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469398913] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:26:56,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729694635] [2021-11-02 23:26:56,847 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:26:56,847 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:26:56,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:26:56,848 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:26:56,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77834372-4454-422e-933a-87535b072571/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process