./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/ifeqn1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/ifeqn1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6c377c3922cafbc07c158cb252290a97b70e1cbfc6e9de773d7729c460f56857 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:41:09,545 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:41:09,548 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:41:09,588 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:41:09,589 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:41:09,591 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:41:09,593 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:41:09,596 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:41:09,599 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:41:09,601 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:41:09,603 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:41:09,605 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:41:09,606 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:41:09,607 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:41:09,610 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:41:09,612 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:41:09,614 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:41:09,615 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:41:09,618 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:41:09,621 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:41:09,624 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:41:09,626 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:41:09,628 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:41:09,629 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:41:09,634 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:41:09,634 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:41:09,635 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:41:09,636 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:41:09,637 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:41:09,639 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:41:09,640 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:41:09,641 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:41:09,642 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:41:09,644 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:41:09,646 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:41:09,647 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:41:09,648 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:41:09,648 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:41:09,649 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:41:09,650 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:41:09,651 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:41:09,653 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-13 18:41:09,691 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:41:09,694 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:41:09,695 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:41:09,695 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:41:09,700 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:41:09,701 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:41:09,702 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:41:09,702 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:41:09,702 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:41:09,703 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:41:09,703 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 18:41:09,703 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 18:41:09,704 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 18:41:09,704 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:41:09,704 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 18:41:09,705 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:41:09,705 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 18:41:09,705 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 18:41:09,705 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 18:41:09,706 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:41:09,706 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 18:41:09,706 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:41:09,707 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:41:09,707 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:41:09,707 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:41:09,708 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:41:09,708 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:41:09,708 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 18:41:09,709 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 18:41:09,709 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 18:41:09,709 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 18:41:09,709 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 18:41:09,710 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 18:41:09,710 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:41:09,710 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_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6c377c3922cafbc07c158cb252290a97b70e1cbfc6e9de773d7729c460f56857 [2021-11-13 18:41:10,034 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:41:10,073 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:41:10,076 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:41:10,078 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:41:10,079 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:41:10,081 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/array-fpi/ifeqn1.c [2021-11-13 18:41:10,172 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/data/3b108639d/3d9531d47f83495c92732478271709f1/FLAGc9cc86630 [2021-11-13 18:41:10,808 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:41:10,809 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/sv-benchmarks/c/array-fpi/ifeqn1.c [2021-11-13 18:41:10,818 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/data/3b108639d/3d9531d47f83495c92732478271709f1/FLAGc9cc86630 [2021-11-13 18:41:11,160 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/data/3b108639d/3d9531d47f83495c92732478271709f1 [2021-11-13 18:41:11,163 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:41:11,167 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 18:41:11,169 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:41:11,169 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:41:11,178 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:41:11,179 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:41:11" (1/1) ... [2021-11-13 18:41:11,181 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c341f08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:41:11, skipping insertion in model container [2021-11-13 18:41:11,181 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:41:11" (1/1) ... [2021-11-13 18:41:11,194 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:41:11,217 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:41:11,433 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_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/sv-benchmarks/c/array-fpi/ifeqn1.c[589,602] [2021-11-13 18:41:11,488 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:41:11,502 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:41:11,531 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_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/sv-benchmarks/c/array-fpi/ifeqn1.c[589,602] [2021-11-13 18:41:11,542 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:41:11,560 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:41:11,561 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:41:11 WrapperNode [2021-11-13 18:41:11,561 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:41:11,563 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 18:41:11,563 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 18:41:11,563 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 18:41:11,573 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:41:11" (1/1) ... [2021-11-13 18:41:11,580 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:41:11" (1/1) ... [2021-11-13 18:41:11,608 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 18:41:11,609 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:41:11,609 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:41:11,610 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:41:11,621 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:41:11" (1/1) ... [2021-11-13 18:41:11,622 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:41:11" (1/1) ... [2021-11-13 18:41:11,624 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:41:11" (1/1) ... [2021-11-13 18:41:11,625 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:41:11" (1/1) ... [2021-11-13 18:41:11,634 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:41:11" (1/1) ... [2021-11-13 18:41:11,641 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:41:11" (1/1) ... [2021-11-13 18:41:11,643 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:41:11" (1/1) ... [2021-11-13 18:41:11,646 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:41:11,647 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:41:11,647 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:41:11,648 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:41:11,649 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:41:11" (1/1) ... [2021-11-13 18:41:11,677 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:41:11,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:41:11,725 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:41:11,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:41:11,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 18:41:11,795 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:41:11,795 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-13 18:41:11,795 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 18:41:11,795 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:41:11,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:41:11,795 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-13 18:41:12,202 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:41:12,202 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-13 18:41:12,205 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:41:12 BoogieIcfgContainer [2021-11-13 18:41:12,205 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:41:12,207 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:41:12,208 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:41:12,212 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:41:12,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:41:11" (1/3) ... [2021-11-13 18:41:12,214 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d393115 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:41:12, skipping insertion in model container [2021-11-13 18:41:12,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:41:11" (2/3) ... [2021-11-13 18:41:12,215 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d393115 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:41:12, skipping insertion in model container [2021-11-13 18:41:12,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:41:12" (3/3) ... [2021-11-13 18:41:12,217 INFO L111 eAbstractionObserver]: Analyzing ICFG ifeqn1.c [2021-11-13 18:41:12,223 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:41:12,224 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 18:41:12,300 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:41:12,310 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-13 18:41:12,311 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 18:41:12,352 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:12,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-13 18:41:12,361 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:41:12,362 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:41:12,363 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:41:12,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:41:12,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1670316217, now seen corresponding path program 1 times [2021-11-13 18:41:12,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:41:12,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887633979] [2021-11-13 18:41:12,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:41:12,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:41:12,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:12,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:41:12,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:41:12,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887633979] [2021-11-13 18:41:12,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887633979] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:41:12,623 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:41:12,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 18:41:12,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673882066] [2021-11-13 18:41:12,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:41:12,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-13 18:41:12,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:41:12,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-13 18:41:12,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 18:41:12,684 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:12,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:41:12,704 INFO L93 Difference]: Finished difference Result 42 states and 60 transitions. [2021-11-13 18:41:12,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-13 18:41:12,707 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-13 18:41:12,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:41:12,715 INFO L225 Difference]: With dead ends: 42 [2021-11-13 18:41:12,716 INFO L226 Difference]: Without dead ends: 19 [2021-11-13 18:41:12,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 18:41:12,725 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.71ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-13 18:41:12,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.71ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-13 18:41:12,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-13 18:41:12,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-13 18:41:12,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:12,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-11-13 18:41:12,767 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2021-11-13 18:41:12,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:41:12,767 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-11-13 18:41:12,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:12,768 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-11-13 18:41:12,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-13 18:41:12,769 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:41:12,769 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:41:12,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 18:41:12,770 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:41:12,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:41:12,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1000416578, now seen corresponding path program 1 times [2021-11-13 18:41:12,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:41:12,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571229875] [2021-11-13 18:41:12,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:41:12,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:41:12,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:12,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:41:12,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:41:12,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571229875] [2021-11-13 18:41:12,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571229875] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:41:12,877 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:41:12,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:41:12,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684554968] [2021-11-13 18:41:12,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:41:12,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:41:12,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:41:12,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:41:12,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:41:12,881 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:12,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:41:12,978 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2021-11-13 18:41:12,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:41:12,980 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-13 18:41:12,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:41:12,982 INFO L225 Difference]: With dead ends: 45 [2021-11-13 18:41:12,983 INFO L226 Difference]: Without dead ends: 31 [2021-11-13 18:41:12,983 INFO L932 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 [2021-11-13 18:41:12,986 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 37 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 61.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.48ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 78.90ms IncrementalHoareTripleChecker+Time [2021-11-13 18:41:12,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 17 Invalid, 34 Unknown, 0 Unchecked, 2.48ms Time], IncrementalHoareTripleChecker [10 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 78.90ms Time] [2021-11-13 18:41:12,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-13 18:41:12,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2021-11-13 18:41:13,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:13,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-11-13 18:41:13,002 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2021-11-13 18:41:13,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:41:13,002 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-11-13 18:41:13,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:13,003 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-11-13 18:41:13,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-13 18:41:13,004 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:41:13,005 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:41:13,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 18:41:13,005 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:41:13,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:41:13,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1992201947, now seen corresponding path program 1 times [2021-11-13 18:41:13,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:41:13,007 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133733585] [2021-11-13 18:41:13,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:41:13,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:41:13,058 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 18:41:13,067 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [378011641] [2021-11-13 18:41:13,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:41:13,068 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:41:13,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:41:13,071 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:41:13,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 18:41:13,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:13,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 18:41:13,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:41:13,336 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 11 treesize of output 7 [2021-11-13 18:41:13,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:41:13,484 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:41:13,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:41:13,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133733585] [2021-11-13 18:41:13,485 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 18:41:13,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378011641] [2021-11-13 18:41:13,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378011641] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:41:13,486 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:41:13,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:41:13,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641546019] [2021-11-13 18:41:13,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:41:13,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:41:13,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:41:13,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:41:13,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:41:13,490 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:13,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:41:13,628 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2021-11-13 18:41:13,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:41:13,629 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-13 18:41:13,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:41:13,630 INFO L225 Difference]: With dead ends: 40 [2021-11-13 18:41:13,630 INFO L226 Difference]: Without dead ends: 38 [2021-11-13 18:41:13,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:41:13,633 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 16 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 93.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.50ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 103.30ms IncrementalHoareTripleChecker+Time [2021-11-13 18:41:13,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 62 Invalid, 32 Unknown, 0 Unchecked, 2.50ms Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 103.30ms Time] [2021-11-13 18:41:13,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-13 18:41:13,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2021-11-13 18:41:13,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:13,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-11-13 18:41:13,642 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2021-11-13 18:41:13,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:41:13,643 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-11-13 18:41:13,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:13,644 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-11-13 18:41:13,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-13 18:41:13,645 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:41:13,645 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:41:13,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 18:41:13,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:41:13,865 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:41:13,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:41:13,867 INFO L85 PathProgramCache]: Analyzing trace with hash 259417010, now seen corresponding path program 1 times [2021-11-13 18:41:13,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:41:13,867 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39009856] [2021-11-13 18:41:13,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:41:13,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:41:13,940 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 18:41:13,940 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1168286109] [2021-11-13 18:41:13,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:41:13,941 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:41:13,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:41:13,942 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:41:13,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 18:41:14,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:14,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 18:41:14,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:41:14,254 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:41:14,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:41:14,402 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:41:14,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:41:14,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39009856] [2021-11-13 18:41:14,403 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 18:41:14,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168286109] [2021-11-13 18:41:14,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168286109] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:41:14,411 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:41:14,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-13 18:41:14,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090785209] [2021-11-13 18:41:14,412 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:41:14,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-13 18:41:14,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:41:14,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-13 18:41:14,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:41:14,417 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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) [2021-11-13 18:41:14,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:41:14,675 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2021-11-13 18:41:14,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 18:41:14,677 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-13 18:41:14,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:41:14,680 INFO L225 Difference]: With dead ends: 70 [2021-11-13 18:41:14,680 INFO L226 Difference]: Without dead ends: 43 [2021-11-13 18:41:14,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-11-13 18:41:14,683 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 35 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 118.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.14ms SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 152.83ms IncrementalHoareTripleChecker+Time [2021-11-13 18:41:14,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 44 Invalid, 119 Unknown, 0 Unchecked, 12.14ms Time], IncrementalHoareTripleChecker [31 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 152.83ms Time] [2021-11-13 18:41:14,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-13 18:41:14,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 27. [2021-11-13 18:41:14,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:14,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-11-13 18:41:14,701 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 21 [2021-11-13 18:41:14,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:41:14,702 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-11-13 18:41:14,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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) [2021-11-13 18:41:14,702 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-11-13 18:41:14,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-13 18:41:14,703 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:41:14,703 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:41:14,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 18:41:14,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:41:14,905 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:41:14,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:41:14,905 INFO L85 PathProgramCache]: Analyzing trace with hash 939318754, now seen corresponding path program 1 times [2021-11-13 18:41:14,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:41:14,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816443221] [2021-11-13 18:41:14,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:41:14,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:41:14,961 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 18:41:14,961 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [294042859] [2021-11-13 18:41:14,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:41:14,962 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:41:14,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:41:14,965 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:41:14,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 18:41:15,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:15,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-13 18:41:15,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:41:15,234 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 11 treesize of output 7 [2021-11-13 18:41:15,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:15,389 INFO L354 Elim1Store]: treesize reduction 33, result has 34.0 percent of original size [2021-11-13 18:41:15,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 39 [2021-11-13 18:41:15,507 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:41:15,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:41:21,773 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 18:41:21,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 115 [2021-11-13 18:41:21,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 33 [2021-11-13 18:41:21,986 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 18:41:21,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 289 treesize of output 266 [2021-11-13 18:41:22,160 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 18:41:22,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:41:22,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816443221] [2021-11-13 18:41:22,161 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 18:41:22,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294042859] [2021-11-13 18:41:22,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294042859] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:41:22,162 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:41:22,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-11-13 18:41:22,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893005606] [2021-11-13 18:41:22,163 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:41:22,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 18:41:22,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:41:22,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 18:41:22,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=112, Unknown=2, NotChecked=0, Total=156 [2021-11-13 18:41:22,168 INFO L87 Difference]: Start difference. First operand 27 states and 31 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) [2021-11-13 18:41:22,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:41:22,368 INFO L93 Difference]: Finished difference Result 50 states and 59 transitions. [2021-11-13 18:41:22,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-13 18:41:22,369 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 24 [2021-11-13 18:41:22,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:41:22,370 INFO L225 Difference]: With dead ends: 50 [2021-11-13 18:41:22,371 INFO L226 Difference]: Without dead ends: 38 [2021-11-13 18:41:22,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=59, Invalid=149, Unknown=2, NotChecked=0, Total=210 [2021-11-13 18:41:22,373 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 15 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 90.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.90ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 106.48ms IncrementalHoareTripleChecker+Time [2021-11-13 18:41:22,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 65 Invalid, 93 Unknown, 0 Unchecked, 1.90ms Time], IncrementalHoareTripleChecker [8 Valid, 57 Invalid, 0 Unknown, 28 Unchecked, 106.48ms Time] [2021-11-13 18:41:22,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-13 18:41:22,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2021-11-13 18:41:22,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 34 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) [2021-11-13 18:41:22,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2021-11-13 18:41:22,381 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 24 [2021-11-13 18:41:22,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:41:22,382 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2021-11-13 18:41:22,382 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) [2021-11-13 18:41:22,383 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2021-11-13 18:41:22,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-13 18:41:22,384 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:41:22,384 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:41:22,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-13 18:41:22,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:41:22,597 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:41:22,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:41:22,598 INFO L85 PathProgramCache]: Analyzing trace with hash -672376363, now seen corresponding path program 2 times [2021-11-13 18:41:22,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:41:22,598 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318021656] [2021-11-13 18:41:22,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:41:22,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:41:22,651 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 18:41:22,666 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [893939330] [2021-11-13 18:41:22,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:41:22,666 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:41:22,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:41:22,668 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:41:22,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 18:41:22,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:41:22,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:41:22,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 18:41:22,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:41:22,964 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:41:22,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:41:23,090 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:41:23,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:41:23,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318021656] [2021-11-13 18:41:23,091 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 18:41:23,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893939330] [2021-11-13 18:41:23,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893939330] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:41:23,126 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:41:23,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-13 18:41:23,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168900417] [2021-11-13 18:41:23,127 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:41:23,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-13 18:41:23,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:41:23,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-13 18:41:23,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-13 18:41:23,129 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:23,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:41:23,425 INFO L93 Difference]: Finished difference Result 98 states and 112 transitions. [2021-11-13 18:41:23,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-13 18:41:23,426 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-13 18:41:23,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:41:23,429 INFO L225 Difference]: With dead ends: 98 [2021-11-13 18:41:23,430 INFO L226 Difference]: Without dead ends: 83 [2021-11-13 18:41:23,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-11-13 18:41:23,432 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 86 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 189.77ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.29ms SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 225.05ms IncrementalHoareTripleChecker+Time [2021-11-13 18:41:23,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 66 Invalid, 164 Unknown, 0 Unchecked, 4.29ms Time], IncrementalHoareTripleChecker [50 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 225.05ms Time] [2021-11-13 18:41:23,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-13 18:41:23,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 56. [2021-11-13 18:41:23,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.2) internal successors, (66), 55 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:23,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2021-11-13 18:41:23,446 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 27 [2021-11-13 18:41:23,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:41:23,447 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2021-11-13 18:41:23,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:23,447 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2021-11-13 18:41:23,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-13 18:41:23,449 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:41:23,449 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:41:23,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-13 18:41:23,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:41:23,673 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:41:23,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:41:23,674 INFO L85 PathProgramCache]: Analyzing trace with hash 430403928, now seen corresponding path program 1 times [2021-11-13 18:41:23,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:41:23,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246103127] [2021-11-13 18:41:23,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:41:23,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:41:23,716 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 18:41:23,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [737574633] [2021-11-13 18:41:23,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:41:23,717 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:41:23,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:41:23,718 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:41:23,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-13 18:41:23,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:23,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-13 18:41:23,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:41:23,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-13 18:41:23,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-13 18:41:24,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:24,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 22 [2021-11-13 18:41:24,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:24,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-13 18:41:24,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:41:24,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:24,474 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-13 18:41:24,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 42 [2021-11-13 18:41:24,877 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-11-13 18:41:24,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 38 [2021-11-13 18:41:24,904 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:41:24,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:41:26,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 61 [2021-11-13 18:41:26,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 60 [2021-11-13 18:41:26,228 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:41:26,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:41:26,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246103127] [2021-11-13 18:41:26,229 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 18:41:26,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737574633] [2021-11-13 18:41:26,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737574633] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:41:26,229 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:41:26,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-11-13 18:41:26,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194999621] [2021-11-13 18:41:26,230 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:41:26,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-13 18:41:26,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:41:26,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-13 18:41:26,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-11-13 18:41:26,232 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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) [2021-11-13 18:41:32,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:41:32,734 INFO L93 Difference]: Finished difference Result 210 states and 248 transitions. [2021-11-13 18:41:32,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-13 18:41:32,737 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-13 18:41:32,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:41:32,739 INFO L225 Difference]: With dead ends: 210 [2021-11-13 18:41:32,739 INFO L226 Difference]: Without dead ends: 143 [2021-11-13 18:41:32,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=388, Invalid=1334, Unknown=0, NotChecked=0, Total=1722 [2021-11-13 18:41:32,743 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 185 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1811.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.42ms SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 1974.16ms IncrementalHoareTripleChecker+Time [2021-11-13 18:41:32,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 196 Invalid, 503 Unknown, 0 Unchecked, 7.42ms Time], IncrementalHoareTripleChecker [112 Valid, 332 Invalid, 0 Unknown, 59 Unchecked, 1974.16ms Time] [2021-11-13 18:41:32,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-11-13 18:41:32,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 89. [2021-11-13 18:41:32,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.2386363636363635) internal successors, (109), 88 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:32,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 109 transitions. [2021-11-13 18:41:32,764 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 109 transitions. Word has length 28 [2021-11-13 18:41:32,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:41:32,765 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 109 transitions. [2021-11-13 18:41:32,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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) [2021-11-13 18:41:32,765 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 109 transitions. [2021-11-13 18:41:32,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-13 18:41:32,767 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:41:32,767 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:41:32,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-13 18:41:32,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-13 18:41:32,972 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:41:32,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:41:32,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1487245307, now seen corresponding path program 3 times [2021-11-13 18:41:32,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:41:32,974 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922670328] [2021-11-13 18:41:32,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:41:32,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:41:33,026 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 18:41:33,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1523779064] [2021-11-13 18:41:33,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:41:33,033 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:41:33,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:41:33,034 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:41:33,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-13 18:41:33,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-13 18:41:33,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:41:33,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-13 18:41:33,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:41:34,003 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 11 treesize of output 7 [2021-11-13 18:41:34,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:34,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:34,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:34,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:34,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:34,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:34,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:34,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:34,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:34,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:34,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:34,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:41:34,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:34,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:34,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:41:34,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:41:34,234 INFO L354 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2021-11-13 18:41:34,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 229 treesize of output 397 [2021-11-13 18:41:34,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:34,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:34,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:34,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:34,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:34,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:34,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:41:34,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:34,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:34,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:34,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:41:34,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:41:34,366 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-13 18:41:34,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 176 treesize of output 111 [2021-11-13 18:41:34,437 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-13 18:41:34,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:34,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:34,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:34,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:34,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:34,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:34,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:41:34,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:34,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:34,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:34,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:41:34,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:41:34,510 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-13 18:41:34,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 228 treesize of output 137 [2021-11-13 18:41:34,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:34,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:34,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:34,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:34,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:34,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:41:34,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:34,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:41:34,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:34,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:41:34,567 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-13 18:41:34,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 216 treesize of output 115 [2021-11-13 18:41:34,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:34,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:34,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:34,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:34,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:34,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:34,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:34,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:34,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:34,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:34,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:34,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:34,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:34,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:34,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:34,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:34,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:41:34,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:34,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:41:34,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:34,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:41:34,889 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-13 18:41:34,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 250 treesize of output 442 [2021-11-13 18:41:34,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:34,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:34,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:34,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:34,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:34,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:34,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:35,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:35,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:35,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:35,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:35,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:41:35,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:35,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:35,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:41:35,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:41:35,031 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-13 18:41:35,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 8 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 198 treesize of output 127 [2021-11-13 18:41:35,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:35,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:35,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:35,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:35,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:35,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:35,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:35,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:35,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:35,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:35,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:35,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:35,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:35,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:35,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:41:35,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:41:35,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:41:35,317 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-13 18:41:35,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 8 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 262 treesize of output 157 [2021-11-13 18:41:35,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:35,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:35,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:35,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:35,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:35,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:41:35,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:35,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:35,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:35,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:35,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:35,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:41:35,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:41:35,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:41:35,420 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-13 18:41:35,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 253 treesize of output 131 [2021-11-13 18:41:35,824 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:41:35,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:42:05,363 WARN L227 SmtUtils]: Spent 26.02s on a formula simplification. DAG size of input: 93 DAG size of output: 61 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 18:42:15,831 WARN L227 SmtUtils]: Spent 10.16s on a formula simplification that was a NOOP. DAG size: 61 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 18:42:15,941 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 18:42:15,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1860 treesize of output 1732 [2021-11-13 18:42:16,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2321 treesize of output 2078 [2021-11-13 18:42:16,119 INFO L354 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2021-11-13 18:42:16,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 476 treesize of output 418 [2021-11-13 18:42:16,281 INFO L354 Elim1Store]: treesize reduction 70, result has 1.4 percent of original size [2021-11-13 18:42:16,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 7552 treesize of output 1 [2021-11-13 18:42:16,338 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 18:42:16,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1208 treesize of output 1120 [2021-11-13 18:42:16,410 INFO L354 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2021-11-13 18:42:16,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 260 treesize of output 220 [2021-11-13 18:42:16,435 INFO L354 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2021-11-13 18:42:16,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2743 treesize of output 2440 [2021-11-13 18:42:16,624 INFO L354 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2021-11-13 18:42:16,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 494 treesize of output 1 [2021-11-13 18:42:16,740 INFO L354 Elim1Store]: treesize reduction 144, result has 0.7 percent of original size [2021-11-13 18:42:16,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 16528 treesize of output 1 [2021-11-13 18:42:16,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:42:16,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 260 treesize of output 220 [2021-11-13 18:42:16,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:42:16,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:42:16,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:42:16,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:42:16,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:42:16,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:42:19,012 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 18:42:19,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:42:19,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922670328] [2021-11-13 18:42:19,013 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 18:42:19,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523779064] [2021-11-13 18:42:19,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523779064] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:42:19,013 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:42:19,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 13] total 31 [2021-11-13 18:42:19,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470828165] [2021-11-13 18:42:19,014 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:42:19,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-13 18:42:19,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:42:19,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-13 18:42:19,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=740, Unknown=2, NotChecked=0, Total=930 [2021-11-13 18:42:19,018 INFO L87 Difference]: Start difference. First operand 89 states and 109 transitions. Second operand has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 31 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) [2021-11-13 18:43:00,954 WARN L227 SmtUtils]: Spent 38.71s on a formula simplification. DAG size of input: 89 DAG size of output: 82 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 18:43:37,107 WARN L227 SmtUtils]: Spent 35.92s on a formula simplification. DAG size of input: 88 DAG size of output: 81 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 18:43:47,878 WARN L227 SmtUtils]: Spent 8.31s on a formula simplification that was a NOOP. DAG size: 80 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 18:44:14,870 WARN L227 SmtUtils]: Spent 26.63s on a formula simplification. DAG size of input: 78 DAG size of output: 76 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 18:44:27,907 WARN L227 SmtUtils]: Spent 10.87s on a formula simplification that was a NOOP. DAG size: 66 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 18:44:28,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:44:28,082 INFO L93 Difference]: Finished difference Result 226 states and 280 transitions. [2021-11-13 18:44:28,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-13 18:44:28,083 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 31 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 30 [2021-11-13 18:44:28,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:44:28,085 INFO L225 Difference]: With dead ends: 226 [2021-11-13 18:44:28,085 INFO L226 Difference]: Without dead ends: 144 [2021-11-13 18:44:28,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 973 ImplicationChecksByTransitivity, 170.0s TimeCoverageRelationStatistics Valid=676, Invalid=2860, Unknown=4, NotChecked=0, Total=3540 [2021-11-13 18:44:28,089 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 103 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 741.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.05ms SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 155 IncrementalHoareTripleChecker+Unchecked, 853.16ms IncrementalHoareTripleChecker+Time [2021-11-13 18:44:28,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 100 Invalid, 645 Unknown, 0 Unchecked, 6.05ms Time], IncrementalHoareTripleChecker [124 Valid, 366 Invalid, 0 Unknown, 155 Unchecked, 853.16ms Time] [2021-11-13 18:44:28,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-11-13 18:44:28,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 114. [2021-11-13 18:44:28,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.2300884955752212) internal successors, (139), 113 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:44:28,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 139 transitions. [2021-11-13 18:44:28,115 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 139 transitions. Word has length 30 [2021-11-13 18:44:28,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:44:28,115 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 139 transitions. [2021-11-13 18:44:28,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 31 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) [2021-11-13 18:44:28,116 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 139 transitions. [2021-11-13 18:44:28,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-13 18:44:28,119 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:44:28,119 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:44:28,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-13 18:44:28,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:44:28,326 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:44:28,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:44:28,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1259217666, now seen corresponding path program 4 times [2021-11-13 18:44:28,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:44:28,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682585242] [2021-11-13 18:44:28,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:44:28,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:44:28,362 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 18:44:28,363 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [907790562] [2021-11-13 18:44:28,363 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:44:28,363 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:44:28,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:44:28,365 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:44:28,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-13 18:44:28,967 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:44:28,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:44:28,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-13 18:44:28,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:44:29,142 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 11 treesize of output 7 [2021-11-13 18:44:29,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:29,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:29,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:29,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:29,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:29,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:29,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:29,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:29,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:29,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:29,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:29,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:44:29,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:29,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:29,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:44:29,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:44:29,293 INFO L354 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2021-11-13 18:44:29,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 229 treesize of output 397 [2021-11-13 18:44:29,355 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-13 18:44:29,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:29,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:29,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:29,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:29,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:29,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:29,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:44:29,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:29,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:29,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:29,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:44:29,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:44:29,460 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-13 18:44:29,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 160 treesize of output 95 [2021-11-13 18:44:29,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:29,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:29,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:29,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:29,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:29,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:29,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:44:29,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:29,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:44:29,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:29,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:44:29,565 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-13 18:44:29,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 227 treesize of output 139 [2021-11-13 18:44:29,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:29,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:29,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:29,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:29,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:29,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:44:29,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:29,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:44:29,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:29,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:44:29,613 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-13 18:44:29,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 201 treesize of output 111 [2021-11-13 18:44:29,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:29,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:29,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:29,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:29,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:29,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:29,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:29,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:29,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:29,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:29,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:29,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:29,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:29,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:29,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:44:29,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:29,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:29,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:29,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:29,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:29,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:44:29,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:44:29,848 INFO L354 Elim1Store]: treesize reduction 35, result has 2.8 percent of original size [2021-11-13 18:44:29,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 11 new quantified variables, introduced 21 case distinctions, treesize of input 244 treesize of output 466 [2021-11-13 18:44:29,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:29,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:29,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:29,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:29,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:29,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:29,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:29,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:29,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:29,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:29,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:29,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:44:29,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:29,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:44:29,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:29,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:44:30,006 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-13 18:44:30,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 207 treesize of output 132 [2021-11-13 18:44:30,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:30,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:30,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:30,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:30,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:30,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:30,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:30,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:30,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:30,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:30,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:30,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:44:30,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:30,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:44:30,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:30,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:44:30,158 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-13 18:44:30,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 235 treesize of output 135 [2021-11-13 18:44:30,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:30,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:30,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:30,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:30,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:30,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:30,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:30,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:30,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:30,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:30,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:30,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:30,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:30,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:44:30,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:30,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:44:30,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:44:30,274 INFO L354 Elim1Store]: treesize reduction 33, result has 8.3 percent of original size [2021-11-13 18:44:30,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 238 treesize of output 116 [2021-11-13 18:44:30,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:30,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:30,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:30,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:30,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:30,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:30,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:44:30,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:30,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:30,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:44:30,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:44:30,476 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-13 18:44:30,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 69 treesize of output 71 [2021-11-13 18:44:30,745 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 18:44:30,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:45:54,106 WARN L227 SmtUtils]: Spent 57.16s on a formula simplification. DAG size of input: 143 DAG size of output: 88 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 18:46:41,736 WARN L227 SmtUtils]: Spent 21.85s on a formula simplification that was a NOOP. DAG size: 88 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 18:46:42,180 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 18:46:42,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45749 treesize of output 41955 [2021-11-13 18:46:43,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:46:43,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:46:43,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:46:43,227 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 18:46:43,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 6172 treesize of output 5186 [2021-11-13 18:46:43,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:46:43,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682585242] [2021-11-13 18:46:43,364 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 18:46:43,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907790562] [2021-11-13 18:46:43,364 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-13 18:46:43,364 INFO L186 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:46:43,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-11-13 18:46:43,365 ERROR L172 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-11-13 18:46:43,365 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2021-11-13 18:46:43,373 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-13 18:46:43,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-13 18:46:43,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:46:43,583 INFO L732 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1, 1, 1] [2021-11-13 18:46:43,585 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-13 18:46:43,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.11 06:46:43 BoogieIcfgContainer [2021-11-13 18:46:43,606 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-13 18:46:43,607 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-13 18:46:43,607 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-13 18:46:43,608 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-13 18:46:43,608 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:41:12" (3/4) ... [2021-11-13 18:46:43,612 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-13 18:46:43,612 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-13 18:46:43,613 INFO L158 Benchmark]: Toolchain (without parser) took 332446.47ms. Allocated memory was 115.3MB in the beginning and 167.8MB in the end (delta: 52.4MB). Free memory was 79.6MB in the beginning and 102.1MB in the end (delta: -22.5MB). Peak memory consumption was 29.9MB. Max. memory is 16.1GB. [2021-11-13 18:46:43,613 INFO L158 Benchmark]: CDTParser took 0.39ms. Allocated memory is still 115.3MB. Free memory is still 95.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 18:46:43,614 INFO L158 Benchmark]: CACSL2BoogieTranslator took 393.06ms. Allocated memory is still 115.3MB. Free memory was 79.4MB in the beginning and 91.1MB in the end (delta: -11.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-13 18:46:43,614 INFO L158 Benchmark]: Boogie Procedure Inliner took 45.68ms. Allocated memory is still 115.3MB. Free memory was 91.1MB in the beginning and 89.7MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 18:46:43,615 INFO L158 Benchmark]: Boogie Preprocessor took 37.16ms. Allocated memory is still 115.3MB. Free memory was 89.7MB in the beginning and 88.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-13 18:46:43,615 INFO L158 Benchmark]: RCFGBuilder took 558.06ms. Allocated memory is still 115.3MB. Free memory was 88.2MB in the beginning and 77.1MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-13 18:46:43,616 INFO L158 Benchmark]: TraceAbstraction took 331398.94ms. Allocated memory was 115.3MB in the beginning and 167.8MB in the end (delta: 52.4MB). Free memory was 76.4MB in the beginning and 102.1MB in the end (delta: -25.7MB). Peak memory consumption was 85.3MB. Max. memory is 16.1GB. [2021-11-13 18:46:43,616 INFO L158 Benchmark]: Witness Printer took 5.22ms. Allocated memory is still 167.8MB. Free memory is still 102.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 18:46:43,618 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.39ms. Allocated memory is still 115.3MB. Free memory is still 95.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 393.06ms. Allocated memory is still 115.3MB. Free memory was 79.4MB in the beginning and 91.1MB in the end (delta: -11.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 45.68ms. Allocated memory is still 115.3MB. Free memory was 91.1MB in the beginning and 89.7MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 37.16ms. Allocated memory is still 115.3MB. Free memory was 89.7MB in the beginning and 88.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 558.06ms. Allocated memory is still 115.3MB. Free memory was 88.2MB in the beginning and 77.1MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 331398.94ms. Allocated memory was 115.3MB in the beginning and 167.8MB in the end (delta: 52.4MB). Free memory was 76.4MB in the beginning and 102.1MB in the end (delta: -25.7MB). Peak memory consumption was 85.3MB. Max. memory is 16.1GB. * Witness Printer took 5.22ms. Allocated memory is still 167.8MB. Free memory is still 102.1MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 15]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L13] COND FALSE !(!cond) [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L27] long long i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] i=0 [L31] COND TRUE i main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6c377c3922cafbc07c158cb252290a97b70e1cbfc6e9de773d7729c460f56857 [2021-11-13 18:46:47,264 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:46:47,291 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:46:47,294 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:46:47,296 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:46:47,297 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:46:47,299 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/array-fpi/ifeqn1.c [2021-11-13 18:46:47,391 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/data/96e6825ea/4873e42d5b304b7099eeea8938a39edd/FLAG30e8e096f [2021-11-13 18:46:48,116 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:46:48,119 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/sv-benchmarks/c/array-fpi/ifeqn1.c [2021-11-13 18:46:48,129 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/data/96e6825ea/4873e42d5b304b7099eeea8938a39edd/FLAG30e8e096f [2021-11-13 18:46:48,434 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/data/96e6825ea/4873e42d5b304b7099eeea8938a39edd [2021-11-13 18:46:48,439 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:46:48,442 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 18:46:48,447 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:46:48,447 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:46:48,453 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:46:48,454 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:46:48" (1/1) ... [2021-11-13 18:46:48,457 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bd5aec7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:46:48, skipping insertion in model container [2021-11-13 18:46:48,458 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:46:48" (1/1) ... [2021-11-13 18:46:48,468 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:46:48,490 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:46:48,727 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_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/sv-benchmarks/c/array-fpi/ifeqn1.c[589,602] [2021-11-13 18:46:48,775 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:46:48,801 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:46:48,822 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_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/sv-benchmarks/c/array-fpi/ifeqn1.c[589,602] [2021-11-13 18:46:48,855 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:46:48,892 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:46:48,892 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:46:48 WrapperNode [2021-11-13 18:46:48,893 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:46:48,894 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 18:46:48,894 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 18:46:48,895 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 18:46:48,905 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:46:48" (1/1) ... [2021-11-13 18:46:48,952 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:46:48" (1/1) ... [2021-11-13 18:46:48,996 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 18:46:48,998 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:46:48,999 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:46:48,999 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:46:49,010 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:46:48" (1/1) ... [2021-11-13 18:46:49,010 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:46:48" (1/1) ... [2021-11-13 18:46:49,022 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:46:48" (1/1) ... [2021-11-13 18:46:49,023 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:46:48" (1/1) ... [2021-11-13 18:46:49,048 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:46:48" (1/1) ... [2021-11-13 18:46:49,054 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:46:48" (1/1) ... [2021-11-13 18:46:49,062 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:46:48" (1/1) ... [2021-11-13 18:46:49,072 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:46:49,073 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:46:49,075 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:46:49,076 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:46:49,077 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:46:48" (1/1) ... [2021-11-13 18:46:49,092 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:46:49,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:46:49,125 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:46:49,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:46:49,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-13 18:46:49,194 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:46:49,194 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-13 18:46:49,194 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 18:46:49,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:46:49,195 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:46:49,195 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-13 18:46:49,797 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:46:49,798 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-13 18:46:49,800 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:46:49 BoogieIcfgContainer [2021-11-13 18:46:49,801 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:46:49,803 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:46:49,803 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:46:49,807 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:46:49,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:46:48" (1/3) ... [2021-11-13 18:46:49,809 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e6e3744 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:46:49, skipping insertion in model container [2021-11-13 18:46:49,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:46:48" (2/3) ... [2021-11-13 18:46:49,810 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e6e3744 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:46:49, skipping insertion in model container [2021-11-13 18:46:49,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:46:49" (3/3) ... [2021-11-13 18:46:49,812 INFO L111 eAbstractionObserver]: Analyzing ICFG ifeqn1.c [2021-11-13 18:46:49,819 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:46:49,819 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 18:46:49,883 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:46:49,893 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-13 18:46:49,893 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 18:46:49,911 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:46:49,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-13 18:46:49,919 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:49,920 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:49,921 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:46:49,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:49,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1670316217, now seen corresponding path program 1 times [2021-11-13 18:46:49,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:46:49,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [498557543] [2021-11-13 18:46:49,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:46:49,946 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:46:49,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:46:49,950 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:46:49,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-13 18:46:50,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:50,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-13 18:46:50,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:46:50,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:46:50,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:46:50,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:46:50,362 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:46:50,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [498557543] [2021-11-13 18:46:50,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [498557543] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:46:50,365 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:46:50,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-13 18:46:50,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075541991] [2021-11-13 18:46:50,369 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:46:50,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-13 18:46:50,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:46:50,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-13 18:46:50,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 18:46:50,436 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:46:50,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:46:50,458 INFO L93 Difference]: Finished difference Result 42 states and 60 transitions. [2021-11-13 18:46:50,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-13 18:46:50,462 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-13 18:46:50,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:46:50,477 INFO L225 Difference]: With dead ends: 42 [2021-11-13 18:46:50,478 INFO L226 Difference]: Without dead ends: 19 [2021-11-13 18:46:50,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 18:46:50,491 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.36ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-13 18:46:50,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 1.36ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-13 18:46:50,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-13 18:46:50,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-13 18:46:50,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:46:50,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-11-13 18:46:50,546 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2021-11-13 18:46:50,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:46:50,547 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-11-13 18:46:50,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:46:50,550 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-11-13 18:46:50,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-13 18:46:50,552 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:50,552 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:50,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-13 18:46:50,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:46:50,769 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:46:50,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:50,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1000416578, now seen corresponding path program 1 times [2021-11-13 18:46:50,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:46:50,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1997116295] [2021-11-13 18:46:50,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:46:50,773 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:46:50,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:46:50,775 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:46:50,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-13 18:46:50,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:50,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 18:46:50,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:46:51,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:46:51,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:46:51,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:46:51,406 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:46:51,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1997116295] [2021-11-13 18:46:51,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1997116295] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:46:51,407 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:46:51,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-13 18:46:51,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449411485] [2021-11-13 18:46:51,408 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:46:51,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:46:51,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:46:51,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:46:51,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:46:51,418 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:46:51,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:46:51,956 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2021-11-13 18:46:51,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:46:51,958 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-13 18:46:51,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:46:51,959 INFO L225 Difference]: With dead ends: 45 [2021-11-13 18:46:51,959 INFO L226 Difference]: Without dead ends: 31 [2021-11-13 18:46:51,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:46:51,962 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 64 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 265.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.05ms SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 333.23ms IncrementalHoareTripleChecker+Time [2021-11-13 18:46:51,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 13 Invalid, 60 Unknown, 0 Unchecked, 4.05ms Time], IncrementalHoareTripleChecker [25 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 333.23ms Time] [2021-11-13 18:46:51,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-13 18:46:51,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2021-11-13 18:46:51,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:46:51,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-11-13 18:46:51,972 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2021-11-13 18:46:51,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:46:51,973 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-11-13 18:46:51,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:46:51,974 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-11-13 18:46:51,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-13 18:46:51,975 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:51,975 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:52,001 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-13 18:46:52,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:46:52,191 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:46:52,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:52,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1992201947, now seen corresponding path program 1 times [2021-11-13 18:46:52,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:46:52,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [706292012] [2021-11-13 18:46:52,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:46:52,193 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:46:52,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:46:52,194 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:46:52,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-13 18:46:52,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:52,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 18:46:52,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:46:52,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:46:52,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:46:52,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-13 18:46:52,738 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 18:46:52,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 29 [2021-11-13 18:46:52,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:46:52,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:46:54,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-13 18:46:54,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:46:54,100 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:46:54,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [706292012] [2021-11-13 18:46:54,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [706292012] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:46:54,101 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:46:54,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 9 [2021-11-13 18:46:54,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933250343] [2021-11-13 18:46:54,102 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:46:54,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-13 18:46:54,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:46:54,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-13 18:46:54,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:46:54,105 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:46:56,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:46:56,200 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2021-11-13 18:46:56,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 18:46:56,211 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-13 18:46:56,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:46:56,212 INFO L225 Difference]: With dead ends: 41 [2021-11-13 18:46:56,212 INFO L226 Difference]: Without dead ends: 39 [2021-11-13 18:46:56,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-13 18:46:56,215 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 47 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1464.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.77ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1621.54ms IncrementalHoareTripleChecker+Time [2021-11-13 18:46:56,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 86 Invalid, 66 Unknown, 0 Unchecked, 3.77ms Time], IncrementalHoareTripleChecker [13 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 1621.54ms Time] [2021-11-13 18:46:56,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-13 18:46:56,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2021-11-13 18:46:56,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:46:56,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-11-13 18:46:56,242 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2021-11-13 18:46:56,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:46:56,243 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-11-13 18:46:56,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:46:56,245 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-11-13 18:46:56,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-13 18:46:56,246 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:56,249 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:56,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-13 18:46:56,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:46:56,450 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:46:56,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:56,451 INFO L85 PathProgramCache]: Analyzing trace with hash 259417010, now seen corresponding path program 1 times [2021-11-13 18:46:56,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:46:56,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2001606616] [2021-11-13 18:46:56,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:46:56,452 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:46:56,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:46:56,457 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:46:56,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-13 18:46:56,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:56,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-13 18:46:56,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:46:57,136 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:46:57,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:46:57,554 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:46:57,557 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:46:57,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2001606616] [2021-11-13 18:46:57,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2001606616] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:46:57,559 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:46:57,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-11-13 18:46:57,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280939179] [2021-11-13 18:46:57,560 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:46:57,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-13 18:46:57,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:46:57,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-13 18:46:57,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-11-13 18:46:57,562 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:46:58,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:46:58,764 INFO L93 Difference]: Finished difference Result 75 states and 89 transitions. [2021-11-13 18:46:58,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-13 18:46:58,766 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-13 18:46:58,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:46:58,767 INFO L225 Difference]: With dead ends: 75 [2021-11-13 18:46:58,767 INFO L226 Difference]: Without dead ends: 43 [2021-11-13 18:46:58,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2021-11-13 18:46:58,770 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 122 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 610.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.22ms SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 739.30ms IncrementalHoareTripleChecker+Time [2021-11-13 18:46:58,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 51 Invalid, 211 Unknown, 0 Unchecked, 4.22ms Time], IncrementalHoareTripleChecker [66 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 739.30ms Time] [2021-11-13 18:46:58,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-13 18:46:58,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 29. [2021-11-13 18:46:58,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:46:58,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2021-11-13 18:46:58,780 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 21 [2021-11-13 18:46:58,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:46:58,781 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2021-11-13 18:46:58,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:46:58,781 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2021-11-13 18:46:58,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-13 18:46:58,782 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:58,783 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:58,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-13 18:46:58,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:46:58,998 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:46:58,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:58,999 INFO L85 PathProgramCache]: Analyzing trace with hash 939318754, now seen corresponding path program 1 times [2021-11-13 18:46:58,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:46:59,000 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [772620141] [2021-11-13 18:46:59,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:46:59,000 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:46:59,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:46:59,005 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:46:59,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-13 18:46:59,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:59,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-13 18:46:59,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:46:59,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:46:59,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:46:59,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-13 18:46:59,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:46:59,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:46:59,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:46:59,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:46:59,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:46:59,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:46:59,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:46:59,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:46:59,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:46:59,599 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-13 18:46:59,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 87 treesize of output 71 [2021-11-13 18:47:00,066 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 18:47:00,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 101 treesize of output 69 [2021-11-13 18:47:00,112 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 18:47:00,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:47:12,664 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 18:47:12,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 10132 treesize of output 9372 [2021-11-13 18:47:15,260 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-11-13 18:47:15,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 9238283 treesize of output 8346635 [2021-11-13 18:47:36,470 WARN L227 SmtUtils]: Spent 21.18s on a formula simplification that was a NOOP. DAG size: 6469 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-13 18:47:37,017 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-11-13 18:47:37,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8346635 treesize of output 7243019 [2021-11-13 18:47:58,172 WARN L227 SmtUtils]: Spent 21.13s on a formula simplification that was a NOOP. DAG size: 6466 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-13 18:47:58,413 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:47:58,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [772620141] [2021-11-13 18:47:58,414 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-13 18:47:58,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1342839787] [2021-11-13 18:47:58,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:47:58,415 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 18:47:58,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/cvc4 [2021-11-13 18:47:58,419 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 18:47:58,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-13 18:47:58,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:58,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-13 18:47:58,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:47:58,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:58,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:58,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-13 18:47:59,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:59,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:59,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:59,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:59,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:59,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:59,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:59,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:59,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:47:59,112 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-13 18:47:59,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 87 treesize of output 71 [2021-11-13 18:47:59,447 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 18:47:59,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 101 treesize of output 69 [2021-11-13 18:47:59,470 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 18:47:59,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:48:00,893 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-13 18:48:00,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 5814 treesize of output 1 [2021-11-13 18:48:00,927 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 18:48:00,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1342839787] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:48:00,927 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:48:00,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-11-13 18:48:00,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691554752] [2021-11-13 18:48:00,928 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:48:00,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-13 18:48:00,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:48:00,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-13 18:48:00,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=185, Unknown=4, NotChecked=0, Total=240 [2021-11-13 18:48:00,931 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 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) [2021-11-13 18:48:14,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:48:14,877 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2021-11-13 18:48:14,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-13 18:48:14,878 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 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 24 [2021-11-13 18:48:14,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:48:14,880 INFO L225 Difference]: With dead ends: 51 [2021-11-13 18:48:14,880 INFO L226 Difference]: Without dead ends: 49 [2021-11-13 18:48:14,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 24.8s TimeCoverageRelationStatistics Valid=88, Invalid=325, Unknown=7, NotChecked=0, Total=420 [2021-11-13 18:48:14,882 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 22 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2470.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.15ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 2653.10ms IncrementalHoareTripleChecker+Time [2021-11-13 18:48:14,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 58 Invalid, 140 Unknown, 0 Unchecked, 2.15ms Time], IncrementalHoareTripleChecker [12 Valid, 112 Invalid, 0 Unknown, 16 Unchecked, 2653.10ms Time] [2021-11-13 18:48:14,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-13 18:48:14,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2021-11-13 18:48:14,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.205128205128205) internal successors, (47), 39 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:48:14,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2021-11-13 18:48:14,907 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 24 [2021-11-13 18:48:14,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:48:14,908 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2021-11-13 18:48:14,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 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) [2021-11-13 18:48:14,909 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2021-11-13 18:48:14,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-13 18:48:14,910 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:48:14,910 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:48:14,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-13 18:48:15,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-13 18:48:15,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:48:15,311 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:48:15,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:48:15,312 INFO L85 PathProgramCache]: Analyzing trace with hash 430403928, now seen corresponding path program 1 times [2021-11-13 18:48:15,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:48:15,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2105741335] [2021-11-13 18:48:15,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:15,313 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:48:15,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:48:15,314 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:48:15,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb65e5f8-c40b-4d38-ae11-29b79f20a4aa/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-13 18:48:15,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:15,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-13 18:48:15,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:48:15,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-13 18:48:15,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:48:15,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:48:15,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-13 18:48:15,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:48:15,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:48:15,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:48:15,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:48:15,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:48:15,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:48:15,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 53 [2021-11-13 18:48:16,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:48:16,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:48:16,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:48:16,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:48:16,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:48:16,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:48:16,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:48:16,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:48:16,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 79 [2021-11-13 18:48:16,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:48:16,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:48:16,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:48:16,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:48:16,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:48:16,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:48:16,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:48:16,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:48:16,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:48:16,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:48:16,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:48:16,954 INFO L354 Elim1Store]: treesize reduction 62, result has 19.5 percent of original size [2021-11-13 18:48:16,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 17 case distinctions, treesize of input 131 treesize of output 105 [2021-11-13 18:48:17,890 INFO L354 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2021-11-13 18:48:17,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 149 treesize of output 73 [2021-11-13 18:48:17,965 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:17,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:48:28,610 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 18:48:28,613 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 88422022 treesize of output 22820603 [2021-11-13 18:48:45,503 WARN L227 SmtUtils]: Spent 16.89s on a formula simplification that was a NOOP. DAG size: 1103 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-13 18:48:45,682 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 18:48:45,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22820603 treesize of output 21772033 [2021-11-13 18:49:02,198 WARN L227 SmtUtils]: Spent 16.51s on a formula simplification that was a NOOP. DAG size: 1105 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-13 18:49:18,784 WARN L227 SmtUtils]: Spent 16.58s on a formula simplification that was a NOOP. DAG size: 1102 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-13 18:49:18,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:49:18,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:49:18,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:49:18,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:49:18,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:49:18,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:49:18,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:49:18,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:49:18,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:49:18,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:49:18,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:49:18,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:49:18,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:49:18,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:50:14,693 WARN L227 SmtUtils]: Spent 55.64s on a formula simplification. DAG size of input: 683 DAG size of output: 270 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-13 18:50:14,697 INFO L354 Elim1Store]: treesize reduction 7138, result has 11.9 percent of original size [2021-11-13 18:50:14,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 9 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 223458901 treesize of output 205763493 [2021-11-13 18:53:13,767 WARN L227 SmtUtils]: Spent 2.98m on a formula simplification that was a NOOP. DAG size: 3812 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-13 18:53:19,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:53:19,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:53:19,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:53:19,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:53:19,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:53:19,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:53:19,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:53:19,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:53:19,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:53:19,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:53:19,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 31 [2021-11-13 18:53:20,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:53:20,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:53:20,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:53:20,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:53:20,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:53:20,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:53:20,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:53:20,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:53:20,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:53:20,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:53:20,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 39 [2021-11-13 18:53:21,041 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-13 18:53:21,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:53:21,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:53:21,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:53:21,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:53:21,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:53:21,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:53:21,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:53:21,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:53:21,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:53:21,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:53:21,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:53:21,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:53:21,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:53:21,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:53:21,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:53:21,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 35