./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/zero_sum_const2.c --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_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/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_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-crafted/zero_sum_const2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/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_33c67883-6170-44e9-96cb-3460c166e2b3/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 1be1405ed24182ea691f06aafa4c0ada74bba78ab2a6f90fefc65156bb70df6c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:05:23,489 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:05:23,491 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:05:23,543 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:05:23,544 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:05:23,548 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:05:23,550 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:05:23,555 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:05:23,558 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:05:23,566 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:05:23,567 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:05:23,569 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:05:23,569 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:05:23,573 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:05:23,575 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:05:23,579 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:05:23,581 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:05:23,582 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:05:23,585 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:05:23,596 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:05:23,597 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:05:23,600 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:05:23,603 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:05:23,604 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:05:23,608 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:05:23,609 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:05:23,609 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:05:23,611 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:05:23,612 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:05:23,613 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:05:23,614 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:05:23,615 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:05:23,617 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:05:23,618 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:05:23,620 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:05:23,620 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:05:23,621 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:05:23,621 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:05:23,622 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:05:23,623 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:05:23,623 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:05:23,624 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-02 22:05:23,668 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:05:23,671 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:05:23,672 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:05:23,672 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:05:23,680 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:05:23,680 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:05:23,680 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:05:23,680 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:05:23,681 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 22:05:23,681 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:05:23,682 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 22:05:23,682 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:05:23,682 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 22:05:23,682 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:05:23,683 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 22:05:23,683 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 22:05:23,683 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 22:05:23,683 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:05:23,683 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 22:05:23,684 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:05:23,684 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:05:23,684 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:05:23,684 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:05:23,684 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:05:23,685 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:05:23,685 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 22:05:23,685 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 22:05:23,685 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 22:05:23,685 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 22:05:23,687 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 22:05:23,687 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 22:05:23,687 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:05:23,688 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_33c67883-6170-44e9-96cb-3460c166e2b3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1be1405ed24182ea691f06aafa4c0ada74bba78ab2a6f90fefc65156bb70df6c [2021-11-02 22:05:24,017 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:05:24,039 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:05:24,042 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:05:24,044 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:05:24,045 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:05:24,046 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/array-crafted/zero_sum_const2.c [2021-11-02 22:05:24,136 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/data/f45577a6c/93dc4ac2f9544ed88a871ad07c78c94d/FLAGac31e1a85 [2021-11-02 22:05:24,650 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:05:24,651 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/sv-benchmarks/c/array-crafted/zero_sum_const2.c [2021-11-02 22:05:24,663 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/data/f45577a6c/93dc4ac2f9544ed88a871ad07c78c94d/FLAGac31e1a85 [2021-11-02 22:05:24,988 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/data/f45577a6c/93dc4ac2f9544ed88a871ad07c78c94d [2021-11-02 22:05:24,990 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:05:24,992 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 22:05:24,997 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:05:24,997 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:05:25,001 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:05:25,002 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:05:24" (1/1) ... [2021-11-02 22:05:25,004 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25acf56d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:05:25, skipping insertion in model container [2021-11-02 22:05:25,005 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:05:24" (1/1) ... [2021-11-02 22:05:25,012 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:05:25,029 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:05:25,327 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_33c67883-6170-44e9-96cb-3460c166e2b3/sv-benchmarks/c/array-crafted/zero_sum_const2.c[406,419] [2021-11-02 22:05:25,362 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:05:25,374 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:05:25,390 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_33c67883-6170-44e9-96cb-3460c166e2b3/sv-benchmarks/c/array-crafted/zero_sum_const2.c[406,419] [2021-11-02 22:05:25,413 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:05:25,433 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:05:25,434 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:05:25 WrapperNode [2021-11-02 22:05:25,435 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:05:25,436 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 22:05:25,436 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 22:05:25,436 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 22:05:25,444 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:05:25" (1/1) ... [2021-11-02 22:05:25,464 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:05:25" (1/1) ... [2021-11-02 22:05:25,494 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 22:05:25,495 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:05:25,495 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:05:25,495 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:05:25,504 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:05:25" (1/1) ... [2021-11-02 22:05:25,505 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:05:25" (1/1) ... [2021-11-02 22:05:25,509 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:05:25" (1/1) ... [2021-11-02 22:05:25,509 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:05:25" (1/1) ... [2021-11-02 22:05:25,532 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:05:25" (1/1) ... [2021-11-02 22:05:25,537 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:05:25" (1/1) ... [2021-11-02 22:05:25,545 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:05:25" (1/1) ... [2021-11-02 22:05:25,548 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:05:25,549 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:05:25,550 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:05:25,551 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:05:25,552 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:05:25" (1/1) ... [2021-11-02 22:05:25,562 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:05:25,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:05:25,590 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 22:05:25,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 22:05:25,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 22:05:25,662 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 22:05:25,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-02 22:05:25,663 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-02 22:05:25,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:05:25,663 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:05:25,664 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-02 22:05:26,016 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:05:26,016 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-11-02 22:05:26,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:05:26 BoogieIcfgContainer [2021-11-02 22:05:26,019 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:05:26,021 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 22:05:26,021 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 22:05:26,025 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 22:05:26,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:05:24" (1/3) ... [2021-11-02 22:05:26,028 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ae11e66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:05:26, skipping insertion in model container [2021-11-02 22:05:26,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:05:25" (2/3) ... [2021-11-02 22:05:26,044 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ae11e66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:05:26, skipping insertion in model container [2021-11-02 22:05:26,045 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:05:26" (3/3) ... [2021-11-02 22:05:26,046 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum_const2.c [2021-11-02 22:05:26,052 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 22:05:26,053 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-02 22:05:26,122 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 22:05:26,130 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 22:05:26,130 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-02 22:05:26,146 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 23 states have (on average 1.565217391304348) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:05:26,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-02 22:05:26,151 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:05:26,152 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:05:26,153 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:05:26,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:05:26,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1122046426, now seen corresponding path program 1 times [2021-11-02 22:05:26,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:05:26,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980526657] [2021-11-02 22:05:26,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:05:26,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:05:26,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:05:26,364 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 22:05:26,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:05:26,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980526657] [2021-11-02 22:05:26,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980526657] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:05:26,367 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:05:26,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 22:05:26,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698596078] [2021-11-02 22:05:26,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-02 22:05:26,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:05:26,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-02 22:05:26,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-02 22:05:26,400 INFO L87 Difference]: Start difference. First operand has 25 states, 23 states have (on average 1.565217391304348) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:05:26,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:05:26,417 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2021-11-02 22:05:26,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-02 22:05:26,419 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-02 22:05:26,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:05:26,427 INFO L225 Difference]: With dead ends: 45 [2021-11-02 22:05:26,428 INFO L226 Difference]: Without dead ends: 21 [2021-11-02 22:05:26,430 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-02 22:05:26,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-02 22:05:26,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-11-02 22:05:26,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:05:26,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-11-02 22:05:26,463 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 15 [2021-11-02 22:05:26,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:05:26,464 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-11-02 22:05:26,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:05:26,465 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-11-02 22:05:26,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-02 22:05:26,465 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:05:26,466 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:05:26,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 22:05:26,466 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:05:26,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:05:26,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1896542740, now seen corresponding path program 1 times [2021-11-02 22:05:26,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:05:26,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468898040] [2021-11-02 22:05:26,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:05:26,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:05:26,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:05:26,565 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 22:05:26,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:05:26,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468898040] [2021-11-02 22:05:26,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468898040] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:05:26,566 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:05:26,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:05:26,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367599111] [2021-11-02 22:05:26,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:05:26,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:05:26,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:05:26,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:05:26,570 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:05:26,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:05:26,630 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2021-11-02 22:05:26,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:05:26,631 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-02 22:05:26,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:05:26,632 INFO L225 Difference]: With dead ends: 39 [2021-11-02 22:05:26,632 INFO L226 Difference]: Without dead ends: 23 [2021-11-02 22:05:26,638 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 22:05:26,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-02 22:05:26,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2021-11-02 22:05:26,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 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 22:05:26,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2021-11-02 22:05:26,644 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 15 [2021-11-02 22:05:26,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:05:26,644 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2021-11-02 22:05:26,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:05:26,644 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2021-11-02 22:05:26,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-02 22:05:26,645 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:05:26,645 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 22:05:26,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 22:05:26,646 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:05:26,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:05:26,647 INFO L85 PathProgramCache]: Analyzing trace with hash -66597874, now seen corresponding path program 1 times [2021-11-02 22:05:26,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:05:26,647 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828309891] [2021-11-02 22:05:26,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:05:26,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:05:26,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:05:26,735 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 22:05:26,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:05:26,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828309891] [2021-11-02 22:05:26,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828309891] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:05:26,750 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:05:26,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:05:26,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069923333] [2021-11-02 22:05:26,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:05:26,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:05:26,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:05:26,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:05:26,753 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:05:26,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:05:26,835 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2021-11-02 22:05:26,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:05:26,836 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 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 22:05:26,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:05:26,837 INFO L225 Difference]: With dead ends: 44 [2021-11-02 22:05:26,837 INFO L226 Difference]: Without dead ends: 31 [2021-11-02 22:05:26,838 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:05:26,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-02 22:05:26,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2021-11-02 22:05:26,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 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 22:05:26,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2021-11-02 22:05:26,844 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 17 [2021-11-02 22:05:26,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:05:26,845 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2021-11-02 22:05:26,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:05:26,845 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2021-11-02 22:05:26,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-02 22:05:26,847 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:05:26,847 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:05:26,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 22:05:26,847 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:05:26,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:05:26,848 INFO L85 PathProgramCache]: Analyzing trace with hash -2060422634, now seen corresponding path program 1 times [2021-11-02 22:05:26,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:05:26,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337584133] [2021-11-02 22:05:26,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:05:26,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:05:26,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:05:26,938 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:05:26,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:05:26,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337584133] [2021-11-02 22:05:26,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337584133] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:05:26,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081283014] [2021-11-02 22:05:26,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:05:26,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:05:26,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:05:26,957 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:05:26,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 22:05:27,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:05:27,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 22:05:27,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:05:27,232 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:05:27,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081283014] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:05:27,233 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:05:27,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-11-02 22:05:27,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215931216] [2021-11-02 22:05:27,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:05:27,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:05:27,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:05:27,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:05:27,243 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 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 22:05:27,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:05:27,348 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2021-11-02 22:05:27,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:05:27,349 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 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 25 [2021-11-02 22:05:27,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:05:27,350 INFO L225 Difference]: With dead ends: 49 [2021-11-02 22:05:27,350 INFO L226 Difference]: Without dead ends: 29 [2021-11-02 22:05:27,351 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:05:27,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-02 22:05:27,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-11-02 22:05:27,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 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 22:05:27,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-11-02 22:05:27,358 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 25 [2021-11-02 22:05:27,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:05:27,358 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-11-02 22:05:27,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 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 22:05:27,359 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-11-02 22:05:27,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-02 22:05:27,360 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:05:27,361 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:05:27,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 22:05:27,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:05:27,580 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:05:27,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:05:27,581 INFO L85 PathProgramCache]: Analyzing trace with hash -959615560, now seen corresponding path program 2 times [2021-11-02 22:05:27,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:05:27,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055724776] [2021-11-02 22:05:27,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:05:27,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:05:27,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:05:27,696 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-02 22:05:27,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:05:27,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055724776] [2021-11-02 22:05:27,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055724776] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:05:27,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812600694] [2021-11-02 22:05:27,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:05:27,699 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:05:27,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:05:27,717 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:05:27,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 22:05:27,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:05:27,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:05:27,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 22:05:27,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:05:27,963 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-02 22:05:27,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812600694] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:05:27,964 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:05:27,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-11-02 22:05:27,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595256803] [2021-11-02 22:05:27,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:05:27,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:05:27,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:05:27,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:05:27,967 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:05:28,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:05:28,095 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2021-11-02 22:05:28,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:05:28,096 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-02 22:05:28,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:05:28,100 INFO L225 Difference]: With dead ends: 57 [2021-11-02 22:05:28,101 INFO L226 Difference]: Without dead ends: 41 [2021-11-02 22:05:28,103 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:05:28,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-02 22:05:28,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2021-11-02 22:05:28,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:05:28,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2021-11-02 22:05:28,121 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 27 [2021-11-02 22:05:28,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:05:28,121 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2021-11-02 22:05:28,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:05:28,122 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2021-11-02 22:05:28,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-02 22:05:28,123 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:05:28,123 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:05:28,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-02 22:05:28,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:05:28,324 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:05:28,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:05:28,324 INFO L85 PathProgramCache]: Analyzing trace with hash -2048824896, now seen corresponding path program 3 times [2021-11-02 22:05:28,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:05:28,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672624247] [2021-11-02 22:05:28,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:05:28,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:05:28,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:05:29,425 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:05:29,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:05:29,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672624247] [2021-11-02 22:05:29,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672624247] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:05:29,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732781905] [2021-11-02 22:05:29,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:05:29,429 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:05:29,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:05:29,432 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:05:29,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-02 22:05:29,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-02 22:05:29,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:05:29,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-02 22:05:29,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:05:29,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-02 22:05:29,725 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-02 22:05:29,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-02 22:05:31,738 INFO L354 Elim1Store]: treesize reduction 10, result has 69.7 percent of original size [2021-11-02 22:05:31,739 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 40 treesize of output 42 [2021-11-02 22:05:32,072 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:05:32,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732781905] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:05:32,073 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:05:32,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22] total 37 [2021-11-02 22:05:32,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037154718] [2021-11-02 22:05:32,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-02 22:05:32,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:05:32,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-02 22:05:32,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2021-11-02 22:05:32,078 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 37 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 22:05:33,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:05:33,337 INFO L93 Difference]: Finished difference Result 89 states and 101 transitions. [2021-11-02 22:05:33,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-02 22:05:33,338 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 37 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 35 [2021-11-02 22:05:33,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:05:33,340 INFO L225 Difference]: With dead ends: 89 [2021-11-02 22:05:33,341 INFO L226 Difference]: Without dead ends: 83 [2021-11-02 22:05:33,342 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 17 SyntacticMatches, 8 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=240, Invalid=1922, Unknown=0, NotChecked=0, Total=2162 [2021-11-02 22:05:33,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-02 22:05:33,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 53. [2021-11-02 22:05:33,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 52 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:05:33,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2021-11-02 22:05:33,353 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 35 [2021-11-02 22:05:33,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:05:33,353 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2021-11-02 22:05:33,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 37 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 22:05:33,354 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2021-11-02 22:05:33,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-02 22:05:33,355 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:05:33,355 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:05:33,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-02 22:05:33,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:05:33,572 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:05:33,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:05:33,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1772469278, now seen corresponding path program 4 times [2021-11-02 22:05:33,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:05:33,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971555140] [2021-11-02 22:05:33,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:05:33,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:05:33,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:05:33,654 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-02 22:05:33,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:05:33,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971555140] [2021-11-02 22:05:33,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971555140] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:05:33,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401411827] [2021-11-02 22:05:33,655 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:05:33,655 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:05:33,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:05:33,656 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:05:33,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-02 22:05:33,814 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:05:33,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:05:33,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-02 22:05:33,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:05:33,957 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-02 22:05:33,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401411827] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:05:33,958 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:05:33,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-11-02 22:05:33,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424726273] [2021-11-02 22:05:33,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-02 22:05:33,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:05:33,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-02 22:05:33,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-02 22:05:33,962 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:05:34,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:05:34,155 INFO L93 Difference]: Finished difference Result 121 states and 136 transitions. [2021-11-02 22:05:34,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 22:05:34,156 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-02 22:05:34,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:05:34,157 INFO L225 Difference]: With dead ends: 121 [2021-11-02 22:05:34,157 INFO L226 Difference]: Without dead ends: 72 [2021-11-02 22:05:34,157 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-11-02 22:05:34,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-02 22:05:34,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 56. [2021-11-02 22:05:34,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 55 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:05:34,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2021-11-02 22:05:34,165 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 37 [2021-11-02 22:05:34,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:05:34,165 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2021-11-02 22:05:34,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:05:34,166 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2021-11-02 22:05:34,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-02 22:05:34,167 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:05:34,167 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:05:34,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-02 22:05:34,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-02 22:05:34,392 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:05:34,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:05:34,393 INFO L85 PathProgramCache]: Analyzing trace with hash -192826428, now seen corresponding path program 5 times [2021-11-02 22:05:34,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:05:34,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700212035] [2021-11-02 22:05:34,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:05:34,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:05:34,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:05:34,506 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-02 22:05:34,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:05:34,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700212035] [2021-11-02 22:05:34,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700212035] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:05:34,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236466459] [2021-11-02 22:05:34,517 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:05:34,518 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:05:34,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:05:34,519 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:05:34,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-02 22:05:34,695 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-02 22:05:34,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:05:34,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-02 22:05:34,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:05:34,904 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-02 22:05:34,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236466459] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:05:34,904 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:05:34,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-11-02 22:05:34,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157094904] [2021-11-02 22:05:34,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-02 22:05:34,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:05:34,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-02 22:05:34,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-11-02 22:05:34,907 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:05:35,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:05:35,113 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2021-11-02 22:05:35,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 22:05:35,113 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 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 39 [2021-11-02 22:05:35,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:05:35,116 INFO L225 Difference]: With dead ends: 66 [2021-11-02 22:05:35,117 INFO L226 Difference]: Without dead ends: 50 [2021-11-02 22:05:35,117 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-11-02 22:05:35,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-02 22:05:35,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2021-11-02 22:05:35,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 45 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 22:05:35,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2021-11-02 22:05:35,139 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 39 [2021-11-02 22:05:35,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:05:35,139 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2021-11-02 22:05:35,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:05:35,140 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2021-11-02 22:05:35,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-02 22:05:35,141 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:05:35,141 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:05:35,174 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-02 22:05:35,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-02 22:05:35,342 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:05:35,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:05:35,342 INFO L85 PathProgramCache]: Analyzing trace with hash -604138262, now seen corresponding path program 6 times [2021-11-02 22:05:35,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:05:35,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942991418] [2021-11-02 22:05:35,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:05:35,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:05:35,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:05:37,883 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:05:37,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:05:37,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942991418] [2021-11-02 22:05:37,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942991418] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:05:37,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653327682] [2021-11-02 22:05:37,885 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:05:37,885 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:05:37,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:05:37,889 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:05:37,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-02 22:05:38,064 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-02 22:05:38,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:05:38,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 66 conjunts are in the unsatisfiable core [2021-11-02 22:05:38,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:05:38,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-02 22:05:38,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:05:38,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-02 22:05:38,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:05:38,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:05:38,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:05:38,352 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 22:05:38,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-11-02 22:05:40,999 INFO L354 Elim1Store]: treesize reduction 74, result has 8.6 percent of original size [2021-11-02 22:05:40,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 30 [2021-11-02 22:05:41,132 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:05:41,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653327682] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:05:41,132 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:05:41,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 27] total 61 [2021-11-02 22:05:41,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044536959] [2021-11-02 22:05:41,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-11-02 22:05:41,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:05:41,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-11-02 22:05:41,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=3369, Unknown=0, NotChecked=0, Total=3660 [2021-11-02 22:05:41,136 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 61 states, 61 states have (on average 1.3770491803278688) internal successors, (84), 61 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 22:05:43,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:05:43,626 INFO L93 Difference]: Finished difference Result 81 states and 88 transitions. [2021-11-02 22:05:43,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-02 22:05:43,627 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.3770491803278688) internal successors, (84), 61 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) Word has length 45 [2021-11-02 22:05:43,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:05:43,628 INFO L225 Difference]: With dead ends: 81 [2021-11-02 22:05:43,628 INFO L226 Difference]: Without dead ends: 77 [2021-11-02 22:05:43,631 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1929 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=506, Invalid=5656, Unknown=0, NotChecked=0, Total=6162 [2021-11-02 22:05:43,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-02 22:05:43,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 67. [2021-11-02 22:05:43,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.121212121212121) internal successors, (74), 66 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 22:05:43,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2021-11-02 22:05:43,639 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 45 [2021-11-02 22:05:43,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:05:43,639 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2021-11-02 22:05:43,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.3770491803278688) internal successors, (84), 61 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 22:05:43,640 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2021-11-02 22:05:43,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-02 22:05:43,641 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:05:43,641 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:05:43,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-02 22:05:43,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:05:43,856 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:05:43,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:05:43,857 INFO L85 PathProgramCache]: Analyzing trace with hash -703050612, now seen corresponding path program 7 times [2021-11-02 22:05:43,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:05:43,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696548246] [2021-11-02 22:05:43,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:05:43,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:05:43,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:05:43,939 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-02 22:05:43,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:05:43,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696548246] [2021-11-02 22:05:43,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696548246] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:05:43,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957070007] [2021-11-02 22:05:43,940 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 22:05:43,940 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:05:43,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:05:43,941 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:05:43,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-02 22:05:44,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:05:44,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-02 22:05:44,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:05:44,395 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-02 22:05:44,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957070007] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:05:44,395 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:05:44,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-11-02 22:05:44,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794181500] [2021-11-02 22:05:44,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-02 22:05:44,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:05:44,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-02 22:05:44,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-11-02 22:05:44,397 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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 22:05:44,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:05:44,620 INFO L93 Difference]: Finished difference Result 149 states and 164 transitions. [2021-11-02 22:05:44,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-02 22:05:44,620 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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 47 [2021-11-02 22:05:44,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:05:44,621 INFO L225 Difference]: With dead ends: 149 [2021-11-02 22:05:44,621 INFO L226 Difference]: Without dead ends: 86 [2021-11-02 22:05:44,622 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-11-02 22:05:44,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-02 22:05:44,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 70. [2021-11-02 22:05:44,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.1014492753623188) internal successors, (76), 69 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:05:44,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2021-11-02 22:05:44,630 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 47 [2021-11-02 22:05:44,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:05:44,630 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2021-11-02 22:05:44,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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 22:05:44,630 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2021-11-02 22:05:44,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-02 22:05:44,631 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:05:44,631 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:05:44,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-02 22:05:44,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:05:44,836 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:05:44,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:05:44,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1992374766, now seen corresponding path program 8 times [2021-11-02 22:05:44,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:05:44,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421715494] [2021-11-02 22:05:44,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:05:44,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:05:44,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:05:44,915 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-02 22:05:44,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:05:44,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421715494] [2021-11-02 22:05:44,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421715494] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:05:44,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653077456] [2021-11-02 22:05:44,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:05:44,916 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:05:44,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:05:44,917 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:05:44,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-02 22:05:45,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:05:45,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:05:45,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-02 22:05:45,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:05:45,420 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-02 22:05:45,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653077456] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:05:45,421 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:05:45,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-11-02 22:05:45,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388613236] [2021-11-02 22:05:45,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-02 22:05:45,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:05:45,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-02 22:05:45,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-11-02 22:05:45,423 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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 22:05:45,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:05:45,688 INFO L93 Difference]: Finished difference Result 80 states and 86 transitions. [2021-11-02 22:05:45,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-02 22:05:45,692 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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 49 [2021-11-02 22:05:45,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:05:45,693 INFO L225 Difference]: With dead ends: 80 [2021-11-02 22:05:45,693 INFO L226 Difference]: Without dead ends: 60 [2021-11-02 22:05:45,694 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2021-11-02 22:05:45,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-02 22:05:45,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2021-11-02 22:05:45,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 55 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:05:45,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2021-11-02 22:05:45,700 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 49 [2021-11-02 22:05:45,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:05:45,703 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2021-11-02 22:05:45,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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 22:05:45,704 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2021-11-02 22:05:45,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-02 22:05:45,707 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:05:45,708 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:05:45,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-02 22:05:45,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:05:45,920 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:05:45,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:05:45,921 INFO L85 PathProgramCache]: Analyzing trace with hash -2047700076, now seen corresponding path program 9 times [2021-11-02 22:05:45,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:05:45,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435840622] [2021-11-02 22:05:45,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:05:45,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:05:45,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:05:50,847 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:05:50,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:05:50,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435840622] [2021-11-02 22:05:50,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435840622] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:05:50,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172021877] [2021-11-02 22:05:50,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:05:50,849 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:05:50,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:05:50,851 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:05:50,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-02 22:05:51,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-02 22:05:51,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:05:51,170 WARN L261 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 86 conjunts are in the unsatisfiable core [2021-11-02 22:05:51,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:05:51,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-02 22:05:51,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:05:51,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-11-02 22:05:56,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:05:56,705 INFO L354 Elim1Store]: treesize reduction 152, result has 22.8 percent of original size [2021-11-02 22:05:56,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 73 treesize of output 75 [2021-11-02 22:05:57,134 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 7 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:05:57,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172021877] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:05:57,135 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:05:57,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 30] total 75 [2021-11-02 22:05:57,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926518578] [2021-11-02 22:05:57,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-11-02 22:05:57,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:05:57,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-11-02 22:05:57,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=442, Invalid=5108, Unknown=0, NotChecked=0, Total=5550 [2021-11-02 22:05:57,139 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand has 75 states, 75 states have (on average 1.4) internal successors, (105), 75 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 22:06:05,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:06:05,943 INFO L93 Difference]: Finished difference Result 96 states and 103 transitions. [2021-11-02 22:06:05,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-02 22:06:05,944 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.4) internal successors, (105), 75 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 55 [2021-11-02 22:06:05,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:06:05,945 INFO L225 Difference]: With dead ends: 96 [2021-11-02 22:06:05,945 INFO L226 Difference]: Without dead ends: 92 [2021-11-02 22:06:05,951 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3914 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=1064, Invalid=12275, Unknown=1, NotChecked=0, Total=13340 [2021-11-02 22:06:05,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-02 22:06:05,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81. [2021-11-02 22:06:05,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:06:05,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 88 transitions. [2021-11-02 22:06:05,962 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 88 transitions. Word has length 55 [2021-11-02 22:06:05,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:06:05,962 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 88 transitions. [2021-11-02 22:06:05,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.4) internal successors, (105), 75 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 22:06:05,963 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 88 transitions. [2021-11-02 22:06:05,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-02 22:06:05,964 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:06:05,964 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:06:05,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-02 22:06:06,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:06:06,184 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:06:06,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:06:06,185 INFO L85 PathProgramCache]: Analyzing trace with hash -691517258, now seen corresponding path program 10 times [2021-11-02 22:06:06,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:06:06,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187050136] [2021-11-02 22:06:06,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:06:06,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:06:06,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:06:06,304 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-02 22:06:06,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:06:06,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187050136] [2021-11-02 22:06:06,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187050136] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:06:06,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193318036] [2021-11-02 22:06:06,305 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:06:06,305 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:06:06,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:06:06,306 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:06:06,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-02 22:06:06,721 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:06:06,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:06:06,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-02 22:06:06,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:06:06,947 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-02 22:06:06,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193318036] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:06:06,947 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:06:06,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-11-02 22:06:06,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971256292] [2021-11-02 22:06:06,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-02 22:06:06,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:06:06,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-02 22:06:06,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-11-02 22:06:06,949 INFO L87 Difference]: Start difference. First operand 81 states and 88 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:06:07,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:06:07,206 INFO L93 Difference]: Finished difference Result 177 states and 192 transitions. [2021-11-02 22:06:07,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-02 22:06:07,207 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 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 57 [2021-11-02 22:06:07,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:06:07,207 INFO L225 Difference]: With dead ends: 177 [2021-11-02 22:06:07,208 INFO L226 Difference]: Without dead ends: 100 [2021-11-02 22:06:07,209 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2021-11-02 22:06:07,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-11-02 22:06:07,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 84. [2021-11-02 22:06:07,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.0843373493975903) internal successors, (90), 83 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:06:07,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 90 transitions. [2021-11-02 22:06:07,220 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 90 transitions. Word has length 57 [2021-11-02 22:06:07,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:06:07,220 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 90 transitions. [2021-11-02 22:06:07,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:06:07,221 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 90 transitions. [2021-11-02 22:06:07,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-02 22:06:07,221 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:06:07,222 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:06:07,253 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-02 22:06:07,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-02 22:06:07,440 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:06:07,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:06:07,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1701588072, now seen corresponding path program 11 times [2021-11-02 22:06:07,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:06:07,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316158159] [2021-11-02 22:06:07,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:06:07,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:06:07,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:06:07,554 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-02 22:06:07,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:06:07,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316158159] [2021-11-02 22:06:07,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316158159] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:06:07,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36606993] [2021-11-02 22:06:07,555 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:06:07,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:06:07,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:06:07,556 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:06:07,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-02 22:06:08,168 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-02 22:06:08,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:06:08,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-02 22:06:08,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:06:08,405 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-02 22:06:08,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36606993] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:06:08,406 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:06:08,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-11-02 22:06:08,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056812883] [2021-11-02 22:06:08,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-02 22:06:08,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:06:08,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-02 22:06:08,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-11-02 22:06:08,409 INFO L87 Difference]: Start difference. First operand 84 states and 90 transitions. Second operand has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 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 22:06:08,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:06:08,738 INFO L93 Difference]: Finished difference Result 94 states and 100 transitions. [2021-11-02 22:06:08,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-02 22:06:08,738 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-02 22:06:08,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:06:08,739 INFO L225 Difference]: With dead ends: 94 [2021-11-02 22:06:08,739 INFO L226 Difference]: Without dead ends: 70 [2021-11-02 22:06:08,739 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=199, Invalid=613, Unknown=0, NotChecked=0, Total=812 [2021-11-02 22:06:08,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-02 22:06:08,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2021-11-02 22:06:08,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 65 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:06:08,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2021-11-02 22:06:08,748 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 59 [2021-11-02 22:06:08,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:06:08,748 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2021-11-02 22:06:08,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 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 22:06:08,748 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2021-11-02 22:06:08,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-02 22:06:08,749 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:06:08,749 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:06:08,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-02 22:06:08,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-02 22:06:08,956 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:06:08,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:06:08,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1079638594, now seen corresponding path program 12 times [2021-11-02 22:06:08,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:06:08,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343538157] [2021-11-02 22:06:08,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:06:08,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:06:09,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:06:13,393 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 4 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:06:13,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:06:13,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343538157] [2021-11-02 22:06:13,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343538157] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:06:13,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266796541] [2021-11-02 22:06:13,394 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:06:13,394 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:06:13,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:06:13,395 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:06:13,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-02 22:06:13,903 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-02 22:06:13,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:06:13,906 WARN L261 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 101 conjunts are in the unsatisfiable core [2021-11-02 22:06:13,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:06:14,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-02 22:06:18,560 INFO L354 Elim1Store]: treesize reduction 21, result has 43.2 percent of original size [2021-11-02 22:06:18,561 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 43 treesize of output 40 [2021-11-02 22:06:18,954 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 5 proven. 116 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:06:18,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266796541] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:06:18,955 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:06:18,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 33] total 85 [2021-11-02 22:06:18,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291198392] [2021-11-02 22:06:18,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2021-11-02 22:06:18,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:06:18,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-11-02 22:06:18,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=6759, Unknown=0, NotChecked=0, Total=7140 [2021-11-02 22:06:18,959 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 85 states, 85 states have (on average 1.4352941176470588) internal successors, (122), 85 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:06:32,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:06:32,873 INFO L93 Difference]: Finished difference Result 124 states and 133 transitions. [2021-11-02 22:06:32,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-11-02 22:06:32,873 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.4352941176470588) internal successors, (122), 85 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-02 22:06:32,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:06:32,874 INFO L225 Difference]: With dead ends: 124 [2021-11-02 22:06:32,874 INFO L226 Difference]: Without dead ends: 120 [2021-11-02 22:06:32,882 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5308 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=1487, Invalid=20565, Unknown=0, NotChecked=0, Total=22052 [2021-11-02 22:06:32,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-11-02 22:06:32,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 95. [2021-11-02 22:06:32,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.0851063829787233) internal successors, (102), 94 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:06:32,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 102 transitions. [2021-11-02 22:06:32,894 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 102 transitions. Word has length 65 [2021-11-02 22:06:32,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:06:32,894 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 102 transitions. [2021-11-02 22:06:32,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.4352941176470588) internal successors, (122), 85 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:06:32,895 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 102 transitions. [2021-11-02 22:06:32,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-02 22:06:32,895 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:06:32,896 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:06:32,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-02 22:06:33,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-02 22:06:33,100 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:06:33,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:06:33,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1902631008, now seen corresponding path program 13 times [2021-11-02 22:06:33,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:06:33,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652925075] [2021-11-02 22:06:33,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:06:33,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:06:33,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:06:33,227 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-02 22:06:33,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:06:33,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652925075] [2021-11-02 22:06:33,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652925075] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:06:33,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851171969] [2021-11-02 22:06:33,228 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 22:06:33,229 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:06:33,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:06:33,230 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:06:33,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-02 22:06:33,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:06:33,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-02 22:06:33,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:06:34,080 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-02 22:06:34,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851171969] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:06:34,080 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:06:34,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-11-02 22:06:34,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367860944] [2021-11-02 22:06:34,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-02 22:06:34,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:06:34,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-02 22:06:34,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2021-11-02 22:06:34,082 INFO L87 Difference]: Start difference. First operand 95 states and 102 transitions. Second operand has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:06:34,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:06:34,384 INFO L93 Difference]: Finished difference Result 205 states and 220 transitions. [2021-11-02 22:06:34,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-02 22:06:34,384 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 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 22:06:34,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:06:34,385 INFO L225 Difference]: With dead ends: 205 [2021-11-02 22:06:34,386 INFO L226 Difference]: Without dead ends: 114 [2021-11-02 22:06:34,387 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2021-11-02 22:06:34,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-02 22:06:34,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 98. [2021-11-02 22:06:34,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.0721649484536082) internal successors, (104), 97 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:06:34,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 104 transitions. [2021-11-02 22:06:34,400 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 104 transitions. Word has length 67 [2021-11-02 22:06:34,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:06:34,400 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 104 transitions. [2021-11-02 22:06:34,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:06:34,401 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 104 transitions. [2021-11-02 22:06:34,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-02 22:06:34,401 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:06:34,401 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:06:34,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-02 22:06:34,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-02 22:06:34,608 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:06:34,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:06:34,608 INFO L85 PathProgramCache]: Analyzing trace with hash 2014257346, now seen corresponding path program 14 times [2021-11-02 22:06:34,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:06:34,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642582259] [2021-11-02 22:06:34,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:06:34,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:06:34,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:06:34,738 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-02 22:06:34,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:06:34,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642582259] [2021-11-02 22:06:34,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642582259] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:06:34,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707413016] [2021-11-02 22:06:34,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:06:34,739 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:06:34,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:06:34,740 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:06:34,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-02 22:06:35,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:06:35,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:06:35,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-02 22:06:35,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:06:35,637 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-02 22:06:35,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707413016] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:06:35,637 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:06:35,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-11-02 22:06:35,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490031401] [2021-11-02 22:06:35,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-02 22:06:35,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:06:35,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-02 22:06:35,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-11-02 22:06:35,639 INFO L87 Difference]: Start difference. First operand 98 states and 104 transitions. Second operand has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:06:35,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:06:35,979 INFO L93 Difference]: Finished difference Result 108 states and 114 transitions. [2021-11-02 22:06:35,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-02 22:06:35,980 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 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 69 [2021-11-02 22:06:35,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:06:35,980 INFO L225 Difference]: With dead ends: 108 [2021-11-02 22:06:35,980 INFO L226 Difference]: Without dead ends: 80 [2021-11-02 22:06:35,981 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=266, Invalid=856, Unknown=0, NotChecked=0, Total=1122 [2021-11-02 22:06:35,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-02 22:06:35,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 76. [2021-11-02 22:06:35,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.0666666666666667) internal successors, (80), 75 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:06:35,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2021-11-02 22:06:35,992 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 69 [2021-11-02 22:06:35,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:06:35,992 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2021-11-02 22:06:35,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:06:35,993 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2021-11-02 22:06:35,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-02 22:06:35,994 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:06:35,994 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:06:36,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-02 22:06:36,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-02 22:06:36,208 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:06:36,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:06:36,209 INFO L85 PathProgramCache]: Analyzing trace with hash 209029992, now seen corresponding path program 15 times [2021-11-02 22:06:36,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:06:36,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256774514] [2021-11-02 22:06:36,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:06:36,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:06:36,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:06:42,094 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 9 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:06:42,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:06:42,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256774514] [2021-11-02 22:06:42,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256774514] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:06:42,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36974983] [2021-11-02 22:06:42,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:06:42,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:06:42,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:06:42,096 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:06:42,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-02 22:06:42,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-02 22:06:42,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:06:42,766 WARN L261 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 130 conjunts are in the unsatisfiable core [2021-11-02 22:06:42,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:06:42,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-02 22:06:43,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:06:43,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-02 22:06:43,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:06:43,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:06:43,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:06:43,220 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 22:06:43,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-11-02 22:06:43,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:06:43,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:06:43,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:06:43,370 INFO L354 Elim1Store]: treesize reduction 84, result has 23.6 percent of original size [2021-11-02 22:06:43,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 46 [2021-11-02 22:06:43,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:06:43,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:06:43,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:06:43,642 INFO L354 Elim1Store]: treesize reduction 166, result has 18.6 percent of original size [2021-11-02 22:06:43,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 53 treesize of output 61 [2021-11-02 22:06:43,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:06:43,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:06:43,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:06:43,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:06:43,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:06:43,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:06:43,923 INFO L354 Elim1Store]: treesize reduction 170, result has 13.3 percent of original size [2021-11-02 22:06:43,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 65 treesize of output 76 [2021-11-02 22:06:57,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:06:57,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:06:57,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:06:57,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:06:57,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:06:57,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:06:57,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:06:57,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:06:57,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:06:57,547 INFO L354 Elim1Store]: treesize reduction 579, result has 12.9 percent of original size [2021-11-02 22:06:57,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 15 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 119 treesize of output 130 [2021-11-02 22:06:58,243 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 10 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:06:58,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36974983] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:06:58,244 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:06:58,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 62] total 126 [2021-11-02 22:06:58,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56819691] [2021-11-02 22:06:58,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2021-11-02 22:06:58,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:06:58,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2021-11-02 22:06:58,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=642, Invalid=15108, Unknown=0, NotChecked=0, Total=15750 [2021-11-02 22:06:58,248 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand has 126 states, 126 states have (on average 1.1666666666666667) internal successors, (147), 126 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 22:07:19,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:07:19,389 INFO L93 Difference]: Finished difference Result 138 states and 147 transitions. [2021-11-02 22:07:19,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-11-02 22:07:19,390 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 1.1666666666666667) internal successors, (147), 126 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 75 [2021-11-02 22:07:19,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:07:19,391 INFO L225 Difference]: With dead ends: 138 [2021-11-02 22:07:19,391 INFO L226 Difference]: Without dead ends: 134 [2021-11-02 22:07:19,394 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 12 SyntacticMatches, 6 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10917 ImplicationChecksByTransitivity, 30.3s TimeCoverageRelationStatistics Valid=2013, Invalid=34277, Unknown=0, NotChecked=0, Total=36290 [2021-11-02 22:07:19,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-11-02 22:07:19,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 109. [2021-11-02 22:07:19,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.0740740740740742) internal successors, (116), 108 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 22:07:19,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 116 transitions. [2021-11-02 22:07:19,409 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 116 transitions. Word has length 75 [2021-11-02 22:07:19,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:07:19,410 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 116 transitions. [2021-11-02 22:07:19,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 1.1666666666666667) internal successors, (147), 126 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 22:07:19,410 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 116 transitions. [2021-11-02 22:07:19,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-02 22:07:19,411 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:07:19,411 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:07:19,454 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-11-02 22:07:19,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:07:19,625 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:07:19,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:07:19,625 INFO L85 PathProgramCache]: Analyzing trace with hash -932406390, now seen corresponding path program 16 times [2021-11-02 22:07:19,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:07:19,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522489674] [2021-11-02 22:07:19,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:07:19,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:07:19,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:07:19,803 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-11-02 22:07:19,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:07:19,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522489674] [2021-11-02 22:07:19,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522489674] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:07:19,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303445935] [2021-11-02 22:07:19,804 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:07:19,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:07:19,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:07:19,806 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:07:19,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-02 22:07:20,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:07:20,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:07:20,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-02 22:07:20,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:07:21,234 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-11-02 22:07:21,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303445935] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:07:21,235 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:07:21,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-11-02 22:07:21,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92978318] [2021-11-02 22:07:21,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-02 22:07:21,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:07:21,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-02 22:07:21,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2021-11-02 22:07:21,237 INFO L87 Difference]: Start difference. First operand 109 states and 116 transitions. Second operand has 25 states, 25 states have (on average 2.56) internal successors, (64), 25 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 22:07:21,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:07:21,687 INFO L93 Difference]: Finished difference Result 233 states and 248 transitions. [2021-11-02 22:07:21,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-02 22:07:21,687 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 25 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 77 [2021-11-02 22:07:21,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:07:21,688 INFO L225 Difference]: With dead ends: 233 [2021-11-02 22:07:21,689 INFO L226 Difference]: Without dead ends: 128 [2021-11-02 22:07:21,689 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=247, Invalid=745, Unknown=0, NotChecked=0, Total=992 [2021-11-02 22:07:21,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-11-02 22:07:21,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 112. [2021-11-02 22:07:21,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.063063063063063) internal successors, (118), 111 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 22:07:21,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 118 transitions. [2021-11-02 22:07:21,704 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 118 transitions. Word has length 77 [2021-11-02 22:07:21,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:07:21,705 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 118 transitions. [2021-11-02 22:07:21,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 25 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 22:07:21,705 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 118 transitions. [2021-11-02 22:07:21,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-02 22:07:21,706 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:07:21,706 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:07:21,742 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-11-02 22:07:21,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:07:21,921 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:07:21,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:07:21,921 INFO L85 PathProgramCache]: Analyzing trace with hash -222248596, now seen corresponding path program 17 times [2021-11-02 22:07:21,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:07:21,922 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608040079] [2021-11-02 22:07:21,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:07:21,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:07:21,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:07:22,130 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 25 proven. 60 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-02 22:07:22,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:07:22,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608040079] [2021-11-02 22:07:22,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608040079] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:07:22,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892741962] [2021-11-02 22:07:22,131 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:07:22,131 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:07:22,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:07:22,136 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:07:22,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-02 22:07:23,520 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-02 22:07:23,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:07:23,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-02 22:07:23,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:07:23,904 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-02 22:07:23,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892741962] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:07:23,904 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:07:23,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-11-02 22:07:23,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569295676] [2021-11-02 22:07:23,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-02 22:07:23,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:07:23,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-02 22:07:23,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2021-11-02 22:07:23,906 INFO L87 Difference]: Start difference. First operand 112 states and 118 transitions. Second operand has 25 states, 25 states have (on average 2.88) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:24,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:07:24,342 INFO L93 Difference]: Finished difference Result 122 states and 128 transitions. [2021-11-02 22:07:24,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-02 22:07:24,343 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.88) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-02 22:07:24,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:07:24,343 INFO L225 Difference]: With dead ends: 122 [2021-11-02 22:07:24,343 INFO L226 Difference]: Without dead ends: 90 [2021-11-02 22:07:24,344 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=343, Invalid=1139, Unknown=0, NotChecked=0, Total=1482 [2021-11-02 22:07:24,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-02 22:07:24,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 86. [2021-11-02 22:07:24,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.0588235294117647) internal successors, (90), 85 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:24,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2021-11-02 22:07:24,354 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 79 [2021-11-02 22:07:24,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:07:24,355 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2021-11-02 22:07:24,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.88) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:07:24,355 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2021-11-02 22:07:24,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-02 22:07:24,356 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:07:24,356 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:07:24,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-02 22:07:24,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:07:24,568 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:07:24,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:07:24,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1053375342, now seen corresponding path program 18 times [2021-11-02 22:07:24,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:07:24,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185186503] [2021-11-02 22:07:24,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:07:24,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:07:24,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:07:33,530 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 16 proven. 229 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:07:33,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:07:33,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185186503] [2021-11-02 22:07:33,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185186503] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:07:33,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777218763] [2021-11-02 22:07:33,531 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:07:33,531 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:07:33,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:07:33,533 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:07:33,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-02 22:07:34,690 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-11-02 22:07:34,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:07:34,694 WARN L261 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 139 conjunts are in the unsatisfiable core [2021-11-02 22:07:34,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:07:34,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-02 22:07:45,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:07:45,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:07:45,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:07:45,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:07:45,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:07:45,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:07:45,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:07:45,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:07:45,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:07:45,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:07:45,477 INFO L354 Elim1Store]: treesize reduction 465, result has 30.5 percent of original size [2021-11-02 22:07:45,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 10 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 116 treesize of output 237 [2021-11-02 22:07:46,429 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 11 proven. 209 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-02 22:07:46,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777218763] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:07:46,430 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:07:46,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 40] total 113 [2021-11-02 22:07:46,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262092622] [2021-11-02 22:07:46,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2021-11-02 22:07:46,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:07:46,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2021-11-02 22:07:46,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=713, Invalid=11943, Unknown=0, NotChecked=0, Total=12656 [2021-11-02 22:07:46,434 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand has 113 states, 113 states have (on average 1.3893805309734513) internal successors, (157), 113 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:08:24,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:08:24,173 INFO L93 Difference]: Finished difference Result 149 states and 156 transitions. [2021-11-02 22:08:24,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-11-02 22:08:24,174 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 1.3893805309734513) internal successors, (157), 113 states have internal predecessors, (157), 0 states have call successors, (0), 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 85 [2021-11-02 22:08:24,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:08:24,175 INFO L225 Difference]: With dead ends: 149 [2021-11-02 22:08:24,175 INFO L226 Difference]: Without dead ends: 145 [2021-11-02 22:08:24,178 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10289 ImplicationChecksByTransitivity, 40.1s TimeCoverageRelationStatistics Valid=1960, Invalid=35869, Unknown=1, NotChecked=0, Total=37830 [2021-11-02 22:08:24,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-02 22:08:24,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 123. [2021-11-02 22:08:24,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.0655737704918034) internal successors, (130), 122 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:08:24,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 130 transitions. [2021-11-02 22:08:24,198 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 130 transitions. Word has length 85 [2021-11-02 22:08:24,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:08:24,199 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 130 transitions. [2021-11-02 22:08:24,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 1.3893805309734513) internal successors, (157), 113 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:08:24,199 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 130 transitions. [2021-11-02 22:08:24,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-02 22:08:24,200 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:08:24,201 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:08:24,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-02 22:08:24,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:08:24,412 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:08:24,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:08:24,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1371812404, now seen corresponding path program 19 times [2021-11-02 22:08:24,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:08:24,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942136306] [2021-11-02 22:08:24,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:08:24,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:08:24,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:08:24,684 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 51 proven. 62 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-11-02 22:08:24,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:08:24,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942136306] [2021-11-02 22:08:24,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942136306] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:08:24,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735503478] [2021-11-02 22:08:24,684 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 22:08:24,685 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:08:24,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:08:24,686 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:08:24,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-02 22:08:25,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:08:25,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-02 22:08:25,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:08:26,382 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-11-02 22:08:26,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735503478] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:08:26,382 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:08:26,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2021-11-02 22:08:26,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140014428] [2021-11-02 22:08:26,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-02 22:08:26,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:08:26,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-02 22:08:26,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2021-11-02 22:08:26,384 INFO L87 Difference]: Start difference. First operand 123 states and 130 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:08:26,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:08:26,829 INFO L93 Difference]: Finished difference Result 261 states and 276 transitions. [2021-11-02 22:08:26,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-02 22:08:26,832 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-11-02 22:08:26,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:08:26,833 INFO L225 Difference]: With dead ends: 261 [2021-11-02 22:08:26,833 INFO L226 Difference]: Without dead ends: 142 [2021-11-02 22:08:26,833 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=309, Invalid=951, Unknown=0, NotChecked=0, Total=1260 [2021-11-02 22:08:26,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-02 22:08:26,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 126. [2021-11-02 22:08:26,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.056) internal successors, (132), 125 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:08:26,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 132 transitions. [2021-11-02 22:08:26,862 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 132 transitions. Word has length 87 [2021-11-02 22:08:26,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:08:26,862 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 132 transitions. [2021-11-02 22:08:26,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:08:26,862 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 132 transitions. [2021-11-02 22:08:26,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-02 22:08:26,863 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:08:26,863 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:08:26,892 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-11-02 22:08:27,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-02 22:08:27,064 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:08:27,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:08:27,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1135498646, now seen corresponding path program 20 times [2021-11-02 22:08:27,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:08:27,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906566697] [2021-11-02 22:08:27,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:08:27,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:08:27,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:08:27,317 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-11-02 22:08:27,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:08:27,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906566697] [2021-11-02 22:08:27,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906566697] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:08:27,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304612569] [2021-11-02 22:08:27,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:08:27,318 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:08:27,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:08:27,324 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:08:27,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-02 22:08:28,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:08:28,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:08:28,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-02 22:08:28,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:08:29,405 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-11-02 22:08:29,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304612569] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:08:29,405 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:08:29,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2021-11-02 22:08:29,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949160995] [2021-11-02 22:08:29,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-02 22:08:29,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:08:29,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-02 22:08:29,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2021-11-02 22:08:29,407 INFO L87 Difference]: Start difference. First operand 126 states and 132 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:08:30,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:08:30,004 INFO L93 Difference]: Finished difference Result 136 states and 142 transitions. [2021-11-02 22:08:30,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-02 22:08:30,005 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-11-02 22:08:30,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:08:30,006 INFO L225 Difference]: With dead ends: 136 [2021-11-02 22:08:30,006 INFO L226 Difference]: Without dead ends: 100 [2021-11-02 22:08:30,006 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=430, Invalid=1462, Unknown=0, NotChecked=0, Total=1892 [2021-11-02 22:08:30,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-11-02 22:08:30,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96. [2021-11-02 22:08:30,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0526315789473684) internal successors, (100), 95 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:08:30,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2021-11-02 22:08:30,024 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 89 [2021-11-02 22:08:30,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:08:30,025 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2021-11-02 22:08:30,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:08:30,025 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2021-11-02 22:08:30,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-02 22:08:30,027 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:08:30,027 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:08:30,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-02 22:08:30,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-02 22:08:30,227 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:08:30,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:08:30,228 INFO L85 PathProgramCache]: Analyzing trace with hash 238506300, now seen corresponding path program 21 times [2021-11-02 22:08:30,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:08:30,228 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759569966] [2021-11-02 22:08:30,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:08:30,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:08:30,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:08:42,854 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 25 proven. 295 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:08:42,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:08:42,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759569966] [2021-11-02 22:08:42,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759569966] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:08:42,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446153767] [2021-11-02 22:08:42,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:08:42,854 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:08:42,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:08:42,855 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:08:42,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-02 22:08:44,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-02 22:08:44,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:08:44,417 WARN L261 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 155 conjunts are in the unsatisfiable core [2021-11-02 22:08:44,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:08:44,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-02 22:08:57,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:08:57,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:08:57,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:08:57,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:08:57,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:08:57,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:08:57,743 INFO L354 Elim1Store]: treesize reduction 303, result has 31.0 percent of original size [2021-11-02 22:08:57,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 6 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 98 treesize of output 167 [2021-11-02 22:08:58,584 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 11 proven. 284 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-02 22:08:58,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446153767] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:08:58,585 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:08:58,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 45] total 128 [2021-11-02 22:08:58,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133106986] [2021-11-02 22:08:58,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2021-11-02 22:08:58,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:08:58,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2021-11-02 22:08:58,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=925, Invalid=15331, Unknown=0, NotChecked=0, Total=16256 [2021-11-02 22:08:58,588 INFO L87 Difference]: Start difference. First operand 96 states and 100 transitions. Second operand has 128 states, 128 states have (on average 1.375) internal successors, (176), 128 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:10:00,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:10:00,252 INFO L93 Difference]: Finished difference Result 168 states and 177 transitions. [2021-11-02 22:10:00,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-11-02 22:10:00,253 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 1.375) internal successors, (176), 128 states have internal predecessors, (176), 0 states have call successors, (0), 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 95 [2021-11-02 22:10:00,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:10:00,254 INFO L225 Difference]: With dead ends: 168 [2021-11-02 22:10:00,255 INFO L226 Difference]: Without dead ends: 164 [2021-11-02 22:10:00,262 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 50 SyntacticMatches, 8 SemanticMatches, 220 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13869 ImplicationChecksByTransitivity, 59.3s TimeCoverageRelationStatistics Valid=2777, Invalid=46283, Unknown=2, NotChecked=0, Total=49062 [2021-11-02 22:10:00,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-11-02 22:10:00,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 137. [2021-11-02 22:10:00,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.0588235294117647) internal successors, (144), 136 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:10:00,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 144 transitions. [2021-11-02 22:10:00,289 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 144 transitions. Word has length 95 [2021-11-02 22:10:00,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:10:00,290 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 144 transitions. [2021-11-02 22:10:00,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 1.375) internal successors, (176), 128 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:10:00,290 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 144 transitions. [2021-11-02 22:10:00,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-02 22:10:00,291 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:10:00,291 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:10:00,324 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-11-02 22:10:00,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-02 22:10:00,496 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:10:00,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:10:00,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1624521822, now seen corresponding path program 22 times [2021-11-02 22:10:00,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:10:00,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740328217] [2021-11-02 22:10:00,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:10:00,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:10:00,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:10:00,787 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 66 proven. 79 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2021-11-02 22:10:00,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:10:00,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740328217] [2021-11-02 22:10:00,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740328217] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:10:00,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994294682] [2021-11-02 22:10:00,788 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:10:00,788 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:10:00,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:10:00,789 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:10:00,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-02 22:10:02,489 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:10:02,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:10:02,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-02 22:10:02,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:10:03,053 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2021-11-02 22:10:03,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994294682] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:10:03,053 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:10:03,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 31 [2021-11-02 22:10:03,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065282457] [2021-11-02 22:10:03,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-02 22:10:03,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:10:03,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-02 22:10:03,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=705, Unknown=0, NotChecked=0, Total=930 [2021-11-02 22:10:03,054 INFO L87 Difference]: Start difference. First operand 137 states and 144 transitions. Second operand has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:10:03,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:10:03,671 INFO L93 Difference]: Finished difference Result 289 states and 304 transitions. [2021-11-02 22:10:03,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-02 22:10:03,671 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-11-02 22:10:03,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:10:03,673 INFO L225 Difference]: With dead ends: 289 [2021-11-02 22:10:03,673 INFO L226 Difference]: Without dead ends: 156 [2021-11-02 22:10:03,674 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=1182, Unknown=0, NotChecked=0, Total=1560 [2021-11-02 22:10:03,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-11-02 22:10:03,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 140. [2021-11-02 22:10:03,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.0503597122302157) internal successors, (146), 139 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 22:10:03,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 146 transitions. [2021-11-02 22:10:03,708 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 146 transitions. Word has length 97 [2021-11-02 22:10:03,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:10:03,708 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 146 transitions. [2021-11-02 22:10:03,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:10:03,708 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 146 transitions. [2021-11-02 22:10:03,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-02 22:10:03,709 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:10:03,709 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:10:03,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-02 22:10:03,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-02 22:10:03,910 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:10:03,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:10:03,910 INFO L85 PathProgramCache]: Analyzing trace with hash 55934272, now seen corresponding path program 23 times [2021-11-02 22:10:03,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:10:03,911 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246966435] [2021-11-02 22:10:03,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:10:03,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:10:03,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:10:04,297 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 49 proven. 96 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2021-11-02 22:10:04,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:10:04,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246966435] [2021-11-02 22:10:04,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246966435] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:10:04,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967466463] [2021-11-02 22:10:04,298 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:10:04,298 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:10:04,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:10:04,312 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:10:04,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-02 22:10:06,293 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-11-02 22:10:06,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:10:06,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-02 22:10:06,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:10:06,845 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2021-11-02 22:10:06,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967466463] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:10:06,846 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:10:06,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 31 [2021-11-02 22:10:06,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022113831] [2021-11-02 22:10:06,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-02 22:10:06,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:10:06,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-02 22:10:06,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=697, Unknown=0, NotChecked=0, Total=930 [2021-11-02 22:10:06,848 INFO L87 Difference]: Start difference. First operand 140 states and 146 transitions. Second operand has 31 states, 31 states have (on average 2.5806451612903225) internal successors, (80), 31 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:10:07,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:10:07,514 INFO L93 Difference]: Finished difference Result 150 states and 156 transitions. [2021-11-02 22:10:07,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-02 22:10:07,515 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.5806451612903225) internal successors, (80), 31 states have internal predecessors, (80), 0 states have call successors, (0), 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 99 [2021-11-02 22:10:07,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:10:07,516 INFO L225 Difference]: With dead ends: 150 [2021-11-02 22:10:07,516 INFO L226 Difference]: Without dead ends: 110 [2021-11-02 22:10:07,516 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=527, Invalid=1825, Unknown=0, NotChecked=0, Total=2352 [2021-11-02 22:10:07,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-02 22:10:07,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 106. [2021-11-02 22:10:07,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.0476190476190477) internal successors, (110), 105 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 22:10:07,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 110 transitions. [2021-11-02 22:10:07,541 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 110 transitions. Word has length 99 [2021-11-02 22:10:07,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:10:07,541 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 110 transitions. [2021-11-02 22:10:07,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.5806451612903225) internal successors, (80), 31 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:10:07,542 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 110 transitions. [2021-11-02 22:10:07,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-02 22:10:07,542 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:10:07,543 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:10:07,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-02 22:10:07,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:10:07,743 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:10:07,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:10:07,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1992502938, now seen corresponding path program 24 times [2021-11-02 22:10:07,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:10:07,744 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475736351] [2021-11-02 22:10:07,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:10:07,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:10:07,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:10:25,185 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 9 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:10:25,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:10:25,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475736351] [2021-11-02 22:10:25,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475736351] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:10:25,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337094137] [2021-11-02 22:10:25,185 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:10:25,186 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:10:25,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:10:25,186 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:10:25,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-02 22:10:27,040 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-11-02 22:10:27,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:10:27,046 WARN L261 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 177 conjunts are in the unsatisfiable core [2021-11-02 22:10:27,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:10:28,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-02 22:10:28,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:10:28,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-11-02 22:10:48,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:10:48,587 INFO L354 Elim1Store]: treesize reduction 152, result has 22.8 percent of original size [2021-11-02 22:10:48,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 76 treesize of output 78 [2021-11-02 22:10:49,689 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 2 proven. 403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:10:49,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337094137] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:10:49,689 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:10:49,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 56] total 148 [2021-11-02 22:10:49,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245739175] [2021-11-02 22:10:49,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 148 states [2021-11-02 22:10:49,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:10:49,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2021-11-02 22:10:49,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1427, Invalid=20328, Unknown=1, NotChecked=0, Total=21756 [2021-11-02 22:10:49,695 INFO L87 Difference]: Start difference. First operand 106 states and 110 transitions. Second operand has 148 states, 148 states have (on average 1.3783783783783783) internal successors, (204), 148 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 22:11:37,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:11:37,970 INFO L93 Difference]: Finished difference Result 186 states and 195 transitions. [2021-11-02 22:11:37,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-11-02 22:11:37,970 INFO L78 Accepts]: Start accepts. Automaton has has 148 states, 148 states have (on average 1.3783783783783783) internal successors, (204), 148 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 105 [2021-11-02 22:11:37,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:11:37,972 INFO L225 Difference]: With dead ends: 186 [2021-11-02 22:11:37,972 INFO L226 Difference]: Without dead ends: 182 [2021-11-02 22:11:37,977 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 44 SyntacticMatches, 12 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17744 ImplicationChecksByTransitivity, 66.7s TimeCoverageRelationStatistics Valid=3754, Invalid=57007, Unknown=1, NotChecked=0, Total=60762 [2021-11-02 22:11:37,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-11-02 22:11:38,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 151. [2021-11-02 22:11:38,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.0533333333333332) internal successors, (158), 150 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 22:11:38,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 158 transitions. [2021-11-02 22:11:38,027 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 158 transitions. Word has length 105 [2021-11-02 22:11:38,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:11:38,028 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 158 transitions. [2021-11-02 22:11:38,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 148 states, 148 states have (on average 1.3783783783783783) internal successors, (204), 148 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 22:11:38,028 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 158 transitions. [2021-11-02 22:11:38,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-02 22:11:38,029 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:11:38,029 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:11:38,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-02 22:11:38,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-02 22:11:38,230 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:11:38,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:11:38,230 INFO L85 PathProgramCache]: Analyzing trace with hash 813324808, now seen corresponding path program 25 times [2021-11-02 22:11:38,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:11:38,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151825260] [2021-11-02 22:11:38,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:11:38,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:11:38,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:11:38,555 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 83 proven. 98 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2021-11-02 22:11:38,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:11:38,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151825260] [2021-11-02 22:11:38,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151825260] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:11:38,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827302086] [2021-11-02 22:11:38,556 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 22:11:38,556 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:11:38,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:11:38,560 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:11:38,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-02 22:11:40,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:11:40,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-02 22:11:40,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:11:41,261 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2021-11-02 22:11:41,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827302086] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:11:41,261 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:11:41,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 34 [2021-11-02 22:11:41,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917305290] [2021-11-02 22:11:41,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-02 22:11:41,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:11:41,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-02 22:11:41,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=853, Unknown=0, NotChecked=0, Total=1122 [2021-11-02 22:11:41,262 INFO L87 Difference]: Start difference. First operand 151 states and 158 transitions. Second operand has 34 states, 34 states have (on average 2.411764705882353) internal successors, (82), 34 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 22:11:41,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:11:41,948 INFO L93 Difference]: Finished difference Result 317 states and 332 transitions. [2021-11-02 22:11:41,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-02 22:11:41,949 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.411764705882353) internal successors, (82), 34 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 107 [2021-11-02 22:11:41,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:11:41,950 INFO L225 Difference]: With dead ends: 317 [2021-11-02 22:11:41,950 INFO L226 Difference]: Without dead ends: 170 [2021-11-02 22:11:41,951 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=454, Invalid=1438, Unknown=0, NotChecked=0, Total=1892 [2021-11-02 22:11:41,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-11-02 22:11:41,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 154. [2021-11-02 22:11:41,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.0457516339869282) internal successors, (160), 153 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:11:41,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 160 transitions. [2021-11-02 22:11:41,993 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 160 transitions. Word has length 107 [2021-11-02 22:11:41,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:11:41,993 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 160 transitions. [2021-11-02 22:11:41,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.411764705882353) internal successors, (82), 34 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 22:11:41,994 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 160 transitions. [2021-11-02 22:11:41,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-02 22:11:41,995 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:11:41,995 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:11:42,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-02 22:11:42,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-02 22:11:42,220 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:11:42,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:11:42,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1280583574, now seen corresponding path program 26 times [2021-11-02 22:11:42,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:11:42,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864166062] [2021-11-02 22:11:42,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:11:42,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:11:42,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:11:42,624 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 64 proven. 117 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2021-11-02 22:11:42,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:11:42,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864166062] [2021-11-02 22:11:42,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864166062] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:11:42,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054481126] [2021-11-02 22:11:42,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:11:42,625 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:11:42,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:11:42,632 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:11:42,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-02 22:11:45,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:11:45,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:11:45,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-02 22:11:45,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:11:45,613 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2021-11-02 22:11:45,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054481126] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:11:45,613 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:11:45,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 34 [2021-11-02 22:11:45,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771657999] [2021-11-02 22:11:45,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-02 22:11:45,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:11:45,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-02 22:11:45,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=844, Unknown=0, NotChecked=0, Total=1122 [2021-11-02 22:11:45,615 INFO L87 Difference]: Start difference. First operand 154 states and 160 transitions. Second operand has 34 states, 34 states have (on average 2.411764705882353) internal successors, (82), 34 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 22:11:46,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:11:46,501 INFO L93 Difference]: Finished difference Result 164 states and 170 transitions. [2021-11-02 22:11:46,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-02 22:11:46,502 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.411764705882353) internal successors, (82), 34 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 109 [2021-11-02 22:11:46,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:11:46,502 INFO L225 Difference]: With dead ends: 164 [2021-11-02 22:11:46,502 INFO L226 Difference]: Without dead ends: 120 [2021-11-02 22:11:46,503 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=634, Invalid=2228, Unknown=0, NotChecked=0, Total=2862 [2021-11-02 22:11:46,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-11-02 22:11:46,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 116. [2021-11-02 22:11:46,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.0434782608695652) internal successors, (120), 115 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:11:46,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 120 transitions. [2021-11-02 22:11:46,532 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 120 transitions. Word has length 109 [2021-11-02 22:11:46,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:11:46,532 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 120 transitions. [2021-11-02 22:11:46,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.411764705882353) internal successors, (82), 34 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 22:11:46,532 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 120 transitions. [2021-11-02 22:11:46,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-02 22:11:46,533 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:11:46,533 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:11:46,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-02 22:11:46,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-02 22:11:46,734 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:11:46,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:11:46,734 INFO L85 PathProgramCache]: Analyzing trace with hash 931456272, now seen corresponding path program 27 times [2021-11-02 22:11:46,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:11:46,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236472888] [2021-11-02 22:11:46,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:11:46,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:11:46,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:12:08,429 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 36 proven. 464 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:12:08,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:12:08,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236472888] [2021-11-02 22:12:08,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236472888] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:12:08,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416057882] [2021-11-02 22:12:08,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:12:08,431 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:12:08,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:12:08,432 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:12:08,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-02 22:12:10,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-02 22:12:10,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:12:10,843 WARN L261 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 205 conjunts are in the unsatisfiable core [2021-11-02 22:12:10,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:12:11,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-02 22:12:11,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:11,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-11-02 22:12:11,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:11,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:11,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:11,804 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 22:12:11,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2021-11-02 22:12:12,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:12,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:12,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:12,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:12,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:12,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:12,256 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 22:12:12,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 57 [2021-11-02 22:12:12,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:12,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:12,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:12,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:12,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:12,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:12,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:12,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:12,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:12,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:12,720 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 22:12:12,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 56 [2021-11-02 22:12:12,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:12,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:12,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:12,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:12,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:13,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:13,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:13,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:13,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:13,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:13,046 INFO L354 Elim1Store]: treesize reduction 144, result has 23.4 percent of original size [2021-11-02 22:12:13,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 59 treesize of output 70 [2021-11-02 22:12:13,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:13,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:13,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:13,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:13,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:13,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:13,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:13,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:13,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:13,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:13,662 INFO L354 Elim1Store]: treesize reduction 256, result has 17.9 percent of original size [2021-11-02 22:12:13,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 71 treesize of output 85 [2021-11-02 22:12:14,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:14,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:14,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:14,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:14,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:14,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:14,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:14,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:14,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:14,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:14,376 INFO L354 Elim1Store]: treesize reduction 386, result has 15.0 percent of original size [2021-11-02 22:12:14,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 83 treesize of output 100 [2021-11-02 22:12:14,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:14,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:14,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:14,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:14,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:14,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:14,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:14,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:14,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:14,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:15,110 INFO L354 Elim1Store]: treesize reduction 534, result has 13.0 percent of original size [2021-11-02 22:12:15,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 115 [2021-11-02 22:12:15,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:15,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:15,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:15,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:15,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:15,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:15,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:15,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:15,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:15,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:15,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:15,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:15,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:15,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:15,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:15,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:15,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:15,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:15,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:15,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:12:15,878 INFO L354 Elim1Store]: treesize reduction 436, result has 9.2 percent of original size [2021-11-02 22:12:15,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 20 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 41 case distinctions, treesize of input 107 treesize of output 130 [2021-11-02 22:13:05,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:13:05,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:13:05,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:13:05,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:13:05,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:13:05,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:13:05,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:13:05,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:13:05,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:13:05,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:13:07,204 INFO L354 Elim1Store]: treesize reduction 1849, result has 20.1 percent of original size [2021-11-02 22:13:07,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 20 select indices, 20 select index equivalence classes, 20 disjoint index pairs (out of 190 index pairs), introduced 20 new quantified variables, introduced 190 case distinctions, treesize of input 198 treesize of output 529 [2021-11-02 22:13:11,595 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 26 proven. 474 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:13:11,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416057882] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:13:11,596 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:13:11,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 89] total 193 [2021-11-02 22:13:11,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043169583] [2021-11-02 22:13:11,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2021-11-02 22:13:11,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:13:11,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2021-11-02 22:13:11,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1835, Invalid=35221, Unknown=0, NotChecked=0, Total=37056 [2021-11-02 22:13:11,601 INFO L87 Difference]: Start difference. First operand 116 states and 120 transitions. Second operand has 193 states, 193 states have (on average 1.1761658031088082) internal successors, (227), 193 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:15:29,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:15:29,250 INFO L93 Difference]: Finished difference Result 310 states and 325 transitions. [2021-11-02 22:15:29,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2021-11-02 22:15:29,251 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 1.1761658031088082) internal successors, (227), 193 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-11-02 22:15:29,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:15:29,253 INFO L225 Difference]: With dead ends: 310 [2021-11-02 22:15:29,253 INFO L226 Difference]: Without dead ends: 302 [2021-11-02 22:15:29,261 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 24 SyntacticMatches, 7 SemanticMatches, 334 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33965 ImplicationChecksByTransitivity, 156.4s TimeCoverageRelationStatistics Valid=7290, Invalid=105270, Unknown=0, NotChecked=0, Total=112560 [2021-11-02 22:15:29,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-11-02 22:15:29,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 167. [2021-11-02 22:15:29,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.0542168674698795) internal successors, (175), 166 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:15:29,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 175 transitions. [2021-11-02 22:15:29,325 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 175 transitions. Word has length 115 [2021-11-02 22:15:29,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:15:29,326 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 175 transitions. [2021-11-02 22:15:29,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 1.1761658031088082) internal successors, (227), 193 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:15:29,327 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 175 transitions. [2021-11-02 22:15:29,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-02 22:15:29,328 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:15:29,328 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:15:29,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-02 22:15:29,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:15:29,542 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:15:29,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:15:29,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1829514034, now seen corresponding path program 28 times [2021-11-02 22:15:29,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:15:29,543 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838774045] [2021-11-02 22:15:29,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:15:29,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:15:29,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:15:29,954 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 102 proven. 119 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2021-11-02 22:15:29,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:15:29,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838774045] [2021-11-02 22:15:29,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838774045] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:15:29,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059291236] [2021-11-02 22:15:29,955 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:15:29,955 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:15:29,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:15:29,957 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:15:29,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-02 22:15:32,935 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:15:32,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:15:32,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-02 22:15:32,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:15:33,664 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2021-11-02 22:15:33,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059291236] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:15:33,664 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:15:33,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 37 [2021-11-02 22:15:33,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361363607] [2021-11-02 22:15:33,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-02 22:15:33,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:15:33,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-02 22:15:33,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1015, Unknown=0, NotChecked=0, Total=1332 [2021-11-02 22:15:33,666 INFO L87 Difference]: Start difference. First operand 167 states and 175 transitions. Second operand has 37 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 37 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:15:34,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:15:34,519 INFO L93 Difference]: Finished difference Result 321 states and 337 transitions. [2021-11-02 22:15:34,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-02 22:15:34,519 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 37 states have internal predecessors, (88), 0 states have call successors, (0), 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 117 [2021-11-02 22:15:34,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:15:34,521 INFO L225 Difference]: With dead ends: 321 [2021-11-02 22:15:34,521 INFO L226 Difference]: Without dead ends: 131 [2021-11-02 22:15:34,522 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=537, Invalid=1719, Unknown=0, NotChecked=0, Total=2256 [2021-11-02 22:15:34,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-11-02 22:15:34,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 126. [2021-11-02 22:15:34,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.04) internal successors, (130), 125 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:15:34,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 130 transitions. [2021-11-02 22:15:34,573 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 130 transitions. Word has length 117 [2021-11-02 22:15:34,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:15:34,574 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 130 transitions. [2021-11-02 22:15:34,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 37 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:15:34,574 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 130 transitions. [2021-11-02 22:15:34,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-02 22:15:34,576 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:15:34,576 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:15:34,633 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-11-02 22:15:34,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:15:34,796 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:15:34,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:15:34,797 INFO L85 PathProgramCache]: Analyzing trace with hash 398797882, now seen corresponding path program 29 times [2021-11-02 22:15:34,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:15:34,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164963922] [2021-11-02 22:15:34,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:15:34,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:15:35,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:16:02,106 INFO L134 CoverageAnalysis]: Checked inductivity of 605 backedges. 16 proven. 589 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:16:02,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:16:02,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164963922] [2021-11-02 22:16:02,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164963922] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:16:02,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088265018] [2021-11-02 22:16:02,107 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:16:02,107 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:16:02,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:16:02,108 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:16:02,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-02 22:16:05,667 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-11-02 22:16:05,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:16:05,676 WARN L261 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 216 conjunts are in the unsatisfiable core [2021-11-02 22:16:05,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:16:05,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-02 22:16:06,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:06,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-11-02 22:16:06,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:06,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:06,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:06,416 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 22:16:06,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-02 22:16:06,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:06,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:06,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:06,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:06,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:06,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:06,862 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 22:16:06,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 49 [2021-11-02 22:16:07,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:07,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:07,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:07,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:07,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:07,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:07,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:07,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:07,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:07,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:07,285 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 22:16:07,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 64 [2021-11-02 22:16:07,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:07,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:07,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:07,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:07,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:07,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:07,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:07,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:07,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:07,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:07,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:07,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:07,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:07,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:07,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:07,740 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 22:16:07,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 68 treesize of output 79 [2021-11-02 22:16:08,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:08,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:08,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:08,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:08,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:08,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:08,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:08,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:08,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:08,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:08,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:08,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:08,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:08,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:08,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:08,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:08,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:08,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:08,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:08,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:08,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:08,252 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 22:16:08,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 80 treesize of output 94 [2021-11-02 22:16:08,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:08,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:08,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:08,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:08,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:08,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:08,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:08,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:08,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:08,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:08,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:08,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:08,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:08,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:08,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:08,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:08,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:08,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:08,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:08,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:08,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:08,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:08,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:08,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:08,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:08,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:08,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:08,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:08,840 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 22:16:08,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 77 treesize of output 94 [2021-11-02 22:16:09,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:09,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:09,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:09,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:09,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:09,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:09,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:09,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:09,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:09,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:09,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:09,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:09,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:09,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:09,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:09,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:09,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:09,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:09,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:09,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:09,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:09,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:09,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:09,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:09,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:09,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:09,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:09,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:09,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:09,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:09,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:09,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:09,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:09,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:09,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:09,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:09,428 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 22:16:09,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 36 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 86 treesize of output 106 [2021-11-02 22:16:10,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,066 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 22:16:10,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 45 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 118 [2021-11-02 22:16:10,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:16:10,748 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 22:16:10,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 55 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 102 treesize of output 128 [2021-11-02 22:16:33,141 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 22:16:33,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 55 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 132 treesize of output 48 [2021-11-02 22:16:33,536 INFO L134 CoverageAnalysis]: Checked inductivity of 605 backedges. 0 proven. 605 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:16:33,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088265018] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:16:33,536 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:16:33,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [116, 67] total 179 [2021-11-02 22:16:33,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795340193] [2021-11-02 22:16:33,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 179 states [2021-11-02 22:16:33,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:16:33,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 179 interpolants. [2021-11-02 22:16:33,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=30482, Unknown=0, NotChecked=0, Total=31862 [2021-11-02 22:16:33,542 INFO L87 Difference]: Start difference. First operand 126 states and 130 transitions. Second operand has 179 states, 179 states have (on average 1.3631284916201116) internal successors, (244), 179 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 22:17:31,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:17:31,161 INFO L93 Difference]: Finished difference Result 331 states and 347 transitions. [2021-11-02 22:17:31,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2021-11-02 22:17:31,161 INFO L78 Accepts]: Start accepts. Automaton has has 179 states, 179 states have (on average 1.3631284916201116) internal successors, (244), 179 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) Word has length 125 [2021-11-02 22:17:31,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:17:31,164 INFO L225 Difference]: With dead ends: 331 [2021-11-02 22:17:31,165 INFO L226 Difference]: Without dead ends: 325 [2021-11-02 22:17:31,171 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 55 SyntacticMatches, 10 SemanticMatches, 304 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33138 ImplicationChecksByTransitivity, 78.3s TimeCoverageRelationStatistics Valid=5619, Invalid=87711, Unknown=0, NotChecked=0, Total=93330 [2021-11-02 22:17:31,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-11-02 22:17:31,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 181. [2021-11-02 22:17:31,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.05) internal successors, (189), 180 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:31,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 189 transitions. [2021-11-02 22:17:31,266 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 189 transitions. Word has length 125 [2021-11-02 22:17:31,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:17:31,267 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 189 transitions. [2021-11-02 22:17:31,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 179 states, 179 states have (on average 1.3631284916201116) internal successors, (244), 179 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 22:17:31,268 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 189 transitions. [2021-11-02 22:17:31,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-02 22:17:31,269 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:17:31,269 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:17:31,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-02 22:17:31,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-11-02 22:17:31,480 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:17:31,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:17:31,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1045909468, now seen corresponding path program 30 times [2021-11-02 22:17:31,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:17:31,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522019715] [2021-11-02 22:17:31,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:17:31,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:17:31,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:17:31,933 INFO L134 CoverageAnalysis]: Checked inductivity of 628 backedges. 123 proven. 142 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2021-11-02 22:17:31,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:17:31,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522019715] [2021-11-02 22:17:31,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522019715] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:17:31,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359506040] [2021-11-02 22:17:31,934 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:17:31,934 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:17:31,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:17:31,936 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:17:31,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-02 22:17:36,189 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-11-02 22:17:36,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:17:36,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-02 22:17:36,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:17:36,965 INFO L134 CoverageAnalysis]: Checked inductivity of 628 backedges. 144 proven. 121 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2021-11-02 22:17:36,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359506040] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:17:36,966 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:17:36,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 40 [2021-11-02 22:17:36,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304273133] [2021-11-02 22:17:36,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-02 22:17:36,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:17:36,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-02 22:17:36,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=1191, Unknown=0, NotChecked=0, Total=1560 [2021-11-02 22:17:36,969 INFO L87 Difference]: Start difference. First operand 181 states and 189 transitions. Second operand has 40 states, 40 states have (on average 2.975) internal successors, (119), 40 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 22:17:37,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:17:37,899 INFO L93 Difference]: Finished difference Result 347 states and 363 transitions. [2021-11-02 22:17:37,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-02 22:17:37,900 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.975) internal successors, (119), 40 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 127 [2021-11-02 22:17:37,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:17:37,901 INFO L225 Difference]: With dead ends: 347 [2021-11-02 22:17:37,901 INFO L226 Difference]: Without dead ends: 141 [2021-11-02 22:17:37,902 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=627, Invalid=2025, Unknown=0, NotChecked=0, Total=2652 [2021-11-02 22:17:37,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-11-02 22:17:37,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 136. [2021-11-02 22:17:37,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.037037037037037) internal successors, (140), 135 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:17:37,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 140 transitions. [2021-11-02 22:17:37,965 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 140 transitions. Word has length 127 [2021-11-02 22:17:37,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:17:37,966 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 140 transitions. [2021-11-02 22:17:37,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.975) internal successors, (119), 40 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 22:17:37,966 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 140 transitions. [2021-11-02 22:17:37,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-02 22:17:37,967 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:17:37,968 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:17:38,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-02 22:17:38,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33c67883-6170-44e9-96cb-3460c166e2b3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:17:38,184 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:17:38,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:17:38,185 INFO L85 PathProgramCache]: Analyzing trace with hash 741033700, now seen corresponding path program 31 times [2021-11-02 22:17:38,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:17:38,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967165415] [2021-11-02 22:17:38,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:17:38,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:17:38,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat