./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/mlceu2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-tiling/mlceu2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN --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 5f6dc88ffbc484195ca6ca04cd67e8542305d5e0e0d9b35d5440f9c4d427d3ec --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 09:31:02,585 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 09:31:02,587 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 09:31:02,612 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 09:31:02,613 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 09:31:02,614 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 09:31:02,620 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 09:31:02,624 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 09:31:02,626 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 09:31:02,632 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 09:31:02,634 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 09:31:02,636 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 09:31:02,636 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 09:31:02,642 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 09:31:02,645 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 09:31:02,648 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 09:31:02,649 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 09:31:02,650 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 09:31:02,652 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 09:31:02,659 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 09:31:02,660 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 09:31:02,662 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 09:31:02,663 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 09:31:02,664 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 09:31:02,670 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 09:31:02,670 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 09:31:02,671 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 09:31:02,672 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 09:31:02,672 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 09:31:02,673 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 09:31:02,673 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 09:31:02,674 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 09:31:02,675 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 09:31:02,676 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 09:31:02,677 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 09:31:02,677 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 09:31:02,678 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 09:31:02,678 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 09:31:02,678 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 09:31:02,686 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 09:31:02,688 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 09:31:02,689 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 09:31:02,733 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 09:31:02,733 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 09:31:02,734 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 09:31:02,734 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 09:31:02,735 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 09:31:02,735 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 09:31:02,736 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 09:31:02,736 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 09:31:02,736 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 09:31:02,737 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 09:31:02,738 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 09:31:02,738 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 09:31:02,738 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 09:31:02,738 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 09:31:02,738 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 09:31:02,739 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 09:31:02,739 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 09:31:02,739 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 09:31:02,739 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 09:31:02,739 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 09:31:02,740 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 09:31:02,740 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 09:31:02,740 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 09:31:02,740 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 09:31:02,740 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 09:31:02,741 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 09:31:02,741 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 09:31:02,741 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 09:31:02,741 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 09:31:02,741 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 09:31:02,742 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 09:31:02,742 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 09:31:02,742 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 09:31:02,742 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_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5f6dc88ffbc484195ca6ca04cd67e8542305d5e0e0d9b35d5440f9c4d427d3ec [2022-11-20 09:31:03,066 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 09:31:03,105 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 09:31:03,107 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 09:31:03,109 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 09:31:03,109 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 09:31:03,110 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/array-tiling/mlceu2.c [2022-11-20 09:31:06,218 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 09:31:06,441 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 09:31:06,442 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/sv-benchmarks/c/array-tiling/mlceu2.c [2022-11-20 09:31:06,452 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/data/86e419120/9c4a386eb634477681fc2a4584a0a101/FLAGf0d19d467 [2022-11-20 09:31:06,475 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/data/86e419120/9c4a386eb634477681fc2a4584a0a101 [2022-11-20 09:31:06,481 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 09:31:06,483 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 09:31:06,487 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 09:31:06,487 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 09:31:06,492 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 09:31:06,494 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:31:06" (1/1) ... [2022-11-20 09:31:06,495 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11b7fe40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:31:06, skipping insertion in model container [2022-11-20 09:31:06,495 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:31:06" (1/1) ... [2022-11-20 09:31:06,503 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 09:31:06,520 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 09:31:06,724 WARN L237 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_33a46cca-d0f7-43a2-bb09-fd5eb2992019/sv-benchmarks/c/array-tiling/mlceu2.c[397,410] [2022-11-20 09:31:06,747 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 09:31:06,759 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 09:31:06,774 WARN L237 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_33a46cca-d0f7-43a2-bb09-fd5eb2992019/sv-benchmarks/c/array-tiling/mlceu2.c[397,410] [2022-11-20 09:31:06,786 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 09:31:06,807 INFO L208 MainTranslator]: Completed translation [2022-11-20 09:31:06,808 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:31:06 WrapperNode [2022-11-20 09:31:06,808 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 09:31:06,809 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 09:31:06,810 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 09:31:06,810 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 09:31:06,818 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:31:06" (1/1) ... [2022-11-20 09:31:06,828 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:31:06" (1/1) ... [2022-11-20 09:31:06,849 INFO L138 Inliner]: procedures = 16, calls = 12, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 49 [2022-11-20 09:31:06,850 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 09:31:06,850 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 09:31:06,850 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 09:31:06,851 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 09:31:06,860 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:31:06" (1/1) ... [2022-11-20 09:31:06,860 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:31:06" (1/1) ... [2022-11-20 09:31:06,862 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:31:06" (1/1) ... [2022-11-20 09:31:06,863 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:31:06" (1/1) ... [2022-11-20 09:31:06,867 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:31:06" (1/1) ... [2022-11-20 09:31:06,870 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:31:06" (1/1) ... [2022-11-20 09:31:06,871 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:31:06" (1/1) ... [2022-11-20 09:31:06,872 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:31:06" (1/1) ... [2022-11-20 09:31:06,874 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 09:31:06,875 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 09:31:06,875 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 09:31:06,875 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 09:31:06,876 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:31:06" (1/1) ... [2022-11-20 09:31:06,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 09:31:06,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:31:06,920 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 09:31:06,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 09:31:06,970 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 09:31:06,970 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 09:31:06,971 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 09:31:06,971 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 09:31:06,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 09:31:06,971 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 09:31:06,971 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 09:31:07,059 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 09:31:07,062 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 09:31:07,278 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 09:31:07,283 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 09:31:07,283 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-20 09:31:07,285 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:31:07 BoogieIcfgContainer [2022-11-20 09:31:07,285 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 09:31:07,288 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 09:31:07,289 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 09:31:07,292 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 09:31:07,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 09:31:06" (1/3) ... [2022-11-20 09:31:07,295 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1df67729 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:31:07, skipping insertion in model container [2022-11-20 09:31:07,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:31:06" (2/3) ... [2022-11-20 09:31:07,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1df67729 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:31:07, skipping insertion in model container [2022-11-20 09:31:07,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:31:07" (3/3) ... [2022-11-20 09:31:07,298 INFO L112 eAbstractionObserver]: Analyzing ICFG mlceu2.c [2022-11-20 09:31:07,319 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 09:31:07,320 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 09:31:07,388 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 09:31:07,396 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2ad63342, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 09:31:07,398 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 09:31:07,403 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 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) [2022-11-20 09:31:07,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 09:31:07,410 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:07,411 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:07,411 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:31:07,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:07,416 INFO L85 PathProgramCache]: Analyzing trace with hash 131762974, now seen corresponding path program 1 times [2022-11-20 09:31:07,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:31:07,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601818147] [2022-11-20 09:31:07,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:07,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:31:07,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:07,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:07,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:31:07,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601818147] [2022-11-20 09:31:07,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601818147] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:31:07,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:31:07,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:31:07,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55964860] [2022-11-20 09:31:07,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:31:07,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 09:31:07,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:31:07,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 09:31:07,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 09:31:07,626 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 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) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:07,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:07,641 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2022-11-20 09:31:07,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 09:31:07,644 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 09:31:07,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:07,652 INFO L225 Difference]: With dead ends: 28 [2022-11-20 09:31:07,652 INFO L226 Difference]: Without dead ends: 13 [2022-11-20 09:31:07,655 INFO L412 NwaCegarLoop]: 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 [2022-11-20 09:31:07,658 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:07,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 09:31:07,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-20 09:31:07,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-11-20 09:31:07,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:07,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2022-11-20 09:31:07,689 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 8 [2022-11-20 09:31:07,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:07,689 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2022-11-20 09:31:07,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:07,690 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2022-11-20 09:31:07,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 09:31:07,690 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:07,691 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:07,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 09:31:07,691 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:31:07,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:07,692 INFO L85 PathProgramCache]: Analyzing trace with hash 121604243, now seen corresponding path program 1 times [2022-11-20 09:31:07,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:31:07,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005213511] [2022-11-20 09:31:07,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:07,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:31:07,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:07,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:07,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:31:07,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005213511] [2022-11-20 09:31:07,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005213511] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:31:07,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:31:07,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:31:07,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038934292] [2022-11-20 09:31:07,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:31:07,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:31:07,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:31:07,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:31:07,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:31:07,799 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:07,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:07,863 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2022-11-20 09:31:07,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:31:07,864 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 09:31:07,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:07,865 INFO L225 Difference]: With dead ends: 26 [2022-11-20 09:31:07,865 INFO L226 Difference]: Without dead ends: 16 [2022-11-20 09:31:07,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:31:07,867 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:07,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 16 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 09:31:07,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-20 09:31:07,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2022-11-20 09:31:07,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:07,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2022-11-20 09:31:07,872 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 8 [2022-11-20 09:31:07,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:07,872 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2022-11-20 09:31:07,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:07,872 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2022-11-20 09:31:07,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 09:31:07,873 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:07,873 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:07,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 09:31:07,874 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:31:07,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:07,874 INFO L85 PathProgramCache]: Analyzing trace with hash -150898456, now seen corresponding path program 1 times [2022-11-20 09:31:07,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:31:07,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325115898] [2022-11-20 09:31:07,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:07,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:31:07,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:08,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:08,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:31:08,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325115898] [2022-11-20 09:31:08,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325115898] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:31:08,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808542375] [2022-11-20 09:31:08,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:08,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:31:08,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:31:08,134 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:31:08,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 09:31:08,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:08,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 09:31:08,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:08,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:08,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:31:08,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:08,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808542375] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:31:08,392 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:31:08,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-20 09:31:08,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340472186] [2022-11-20 09:31:08,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:31:08,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 09:31:08,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:31:08,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 09:31:08,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-11-20 09:31:08,395 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:08,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:08,450 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2022-11-20 09:31:08,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 09:31:08,451 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 09:31:08,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:08,452 INFO L225 Difference]: With dead ends: 29 [2022-11-20 09:31:08,452 INFO L226 Difference]: Without dead ends: 19 [2022-11-20 09:31:08,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-11-20 09:31:08,454 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 10 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:08,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 22 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 09:31:08,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-20 09:31:08,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2022-11-20 09:31:08,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:08,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2022-11-20 09:31:08,459 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 11 [2022-11-20 09:31:08,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:08,459 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2022-11-20 09:31:08,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:08,460 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2022-11-20 09:31:08,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:31:08,460 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:08,461 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:08,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 09:31:08,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:31:08,667 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:31:08,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:08,667 INFO L85 PathProgramCache]: Analyzing trace with hash -790614925, now seen corresponding path program 2 times [2022-11-20 09:31:08,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:31:08,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776980807] [2022-11-20 09:31:08,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:08,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:31:08,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:09,293 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:09,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:31:09,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776980807] [2022-11-20 09:31:09,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776980807] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:31:09,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475950184] [2022-11-20 09:31:09,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:31:09,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:31:09,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:31:09,301 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:31:09,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 09:31:09,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:31:09,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:31:09,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 09:31:09,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:09,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 09:31:09,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:31:09,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-20 09:31:09,575 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:09,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:31:09,747 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 19 [2022-11-20 09:31:09,754 INFO L350 Elim1Store]: Elim1 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 118 treesize of output 114 [2022-11-20 09:31:09,862 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:09,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475950184] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:31:09,863 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:31:09,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 13 [2022-11-20 09:31:09,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510312128] [2022-11-20 09:31:09,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:31:09,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 09:31:09,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:31:09,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 09:31:09,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-11-20 09:31:09,870 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:10,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:10,272 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2022-11-20 09:31:10,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 09:31:10,273 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 09:31:10,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:10,273 INFO L225 Difference]: With dead ends: 58 [2022-11-20 09:31:10,274 INFO L226 Difference]: Without dead ends: 56 [2022-11-20 09:31:10,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2022-11-20 09:31:10,275 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 61 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:10,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 82 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 84 Invalid, 0 Unknown, 69 Unchecked, 0.1s Time] [2022-11-20 09:31:10,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-11-20 09:31:10,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 24. [2022-11-20 09:31:10,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:10,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-11-20 09:31:10,282 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 14 [2022-11-20 09:31:10,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:10,282 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-11-20 09:31:10,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:10,283 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-11-20 09:31:10,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-20 09:31:10,284 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:10,284 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:10,304 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-20 09:31:10,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:31:10,489 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:31:10,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:10,490 INFO L85 PathProgramCache]: Analyzing trace with hash 705909382, now seen corresponding path program 1 times [2022-11-20 09:31:10,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:31:10,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42702131] [2022-11-20 09:31:10,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:10,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:31:10,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:10,546 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:10,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:31:10,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42702131] [2022-11-20 09:31:10,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42702131] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:31:10,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683294950] [2022-11-20 09:31:10,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:10,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:31:10,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:31:10,549 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:31:10,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 09:31:10,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:10,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 09:31:10,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:10,636 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:10,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:31:10,678 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:10,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683294950] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:31:10,678 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:31:10,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-11-20 09:31:10,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693772271] [2022-11-20 09:31:10,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:31:10,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 09:31:10,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:31:10,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 09:31:10,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-11-20 09:31:10,680 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:10,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:10,786 INFO L93 Difference]: Finished difference Result 87 states and 101 transitions. [2022-11-20 09:31:10,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 09:31:10,787 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-20 09:31:10,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:10,794 INFO L225 Difference]: With dead ends: 87 [2022-11-20 09:31:10,794 INFO L226 Difference]: Without dead ends: 77 [2022-11-20 09:31:10,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-11-20 09:31:10,796 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 72 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:10,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 38 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 09:31:10,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-11-20 09:31:10,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 36. [2022-11-20 09:31:10,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 35 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:10,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2022-11-20 09:31:10,812 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 17 [2022-11-20 09:31:10,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:10,812 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2022-11-20 09:31:10,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:10,813 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2022-11-20 09:31:10,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-20 09:31:10,813 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:10,814 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:10,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 09:31:11,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:31:11,019 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:31:11,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:11,019 INFO L85 PathProgramCache]: Analyzing trace with hash -601757591, now seen corresponding path program 1 times [2022-11-20 09:31:11,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:31:11,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533689890] [2022-11-20 09:31:11,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:11,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:31:11,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:11,256 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:11,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:31:11,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533689890] [2022-11-20 09:31:11,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533689890] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:31:11,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409265441] [2022-11-20 09:31:11,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:11,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:31:11,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:31:11,259 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:31:11,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 09:31:11,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:11,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 09:31:11,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:11,397 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2022-11-20 09:31:11,514 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:11,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:31:11,552 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 14 [2022-11-20 09:31:11,554 INFO L350 Elim1Store]: Elim1 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 20 treesize of output 16 [2022-11-20 09:31:11,572 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:11,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409265441] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:31:11,573 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:31:11,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-11-20 09:31:11,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287672565] [2022-11-20 09:31:11,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:31:11,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 09:31:11,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:31:11,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 09:31:11,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-11-20 09:31:11,577 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 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) [2022-11-20 09:31:11,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:11,790 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2022-11-20 09:31:11,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 09:31:11,791 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 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 18 [2022-11-20 09:31:11,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:11,792 INFO L225 Difference]: With dead ends: 50 [2022-11-20 09:31:11,792 INFO L226 Difference]: Without dead ends: 48 [2022-11-20 09:31:11,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2022-11-20 09:31:11,794 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 58 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:11,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 60 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 09:31:11,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-20 09:31:11,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2022-11-20 09:31:11,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 41 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:11,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2022-11-20 09:31:11,804 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 18 [2022-11-20 09:31:11,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:11,804 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2022-11-20 09:31:11,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 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) [2022-11-20 09:31:11,805 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2022-11-20 09:31:11,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-20 09:31:11,806 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:11,806 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:11,812 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-20 09:31:12,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:31:12,011 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:31:12,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:12,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1214727841, now seen corresponding path program 2 times [2022-11-20 09:31:12,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:31:12,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799186084] [2022-11-20 09:31:12,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:12,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:31:12,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:12,127 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:12,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:31:12,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799186084] [2022-11-20 09:31:12,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799186084] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:31:12,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630781335] [2022-11-20 09:31:12,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:31:12,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:31:12,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:31:12,136 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:31:12,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 09:31:12,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:31:12,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:31:12,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 09:31:12,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:12,307 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:12,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:31:12,395 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:12,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630781335] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:31:12,397 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:31:12,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-11-20 09:31:12,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269020158] [2022-11-20 09:31:12,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:31:12,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 09:31:12,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:31:12,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 09:31:12,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-11-20 09:31:12,400 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:12,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:12,512 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2022-11-20 09:31:12,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 09:31:12,512 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-20 09:31:12,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:12,513 INFO L225 Difference]: With dead ends: 68 [2022-11-20 09:31:12,513 INFO L226 Difference]: Without dead ends: 52 [2022-11-20 09:31:12,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2022-11-20 09:31:12,514 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 51 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:12,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 61 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 09:31:12,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-20 09:31:12,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2022-11-20 09:31:12,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 41 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) [2022-11-20 09:31:12,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2022-11-20 09:31:12,524 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 22 [2022-11-20 09:31:12,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:12,525 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2022-11-20 09:31:12,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:12,525 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2022-11-20 09:31:12,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-20 09:31:12,526 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:12,526 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:12,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 09:31:12,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:31:12,732 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:31:12,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:12,732 INFO L85 PathProgramCache]: Analyzing trace with hash 185659636, now seen corresponding path program 3 times [2022-11-20 09:31:12,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:31:12,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958357290] [2022-11-20 09:31:12,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:12,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:31:12,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:13,145 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:13,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:31:13,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958357290] [2022-11-20 09:31:13,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958357290] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:31:13,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985701040] [2022-11-20 09:31:13,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:31:13,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:31:13,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:31:13,148 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:31:13,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 09:31:13,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 09:31:13,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:31:13,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 09:31:13,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:13,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 09:31:13,628 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-20 09:31:13,628 INFO L350 Elim1Store]: Elim1 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 44 treesize of output 23 [2022-11-20 09:31:13,649 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:13,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:31:14,027 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 16 [2022-11-20 09:31:14,031 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 20 [2022-11-20 09:31:14,077 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:14,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985701040] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:31:14,077 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:31:14,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 27 [2022-11-20 09:31:14,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997375487] [2022-11-20 09:31:14,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:31:14,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-20 09:31:14,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:31:14,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-20 09:31:14,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2022-11-20 09:31:14,080 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:14,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:14,512 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2022-11-20 09:31:14,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 09:31:14,513 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-20 09:31:14,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:14,513 INFO L225 Difference]: With dead ends: 59 [2022-11-20 09:31:14,513 INFO L226 Difference]: Without dead ends: 43 [2022-11-20 09:31:14,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=249, Invalid=1311, Unknown=0, NotChecked=0, Total=1560 [2022-11-20 09:31:14,515 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 24 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:14,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 110 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 87 Invalid, 0 Unknown, 102 Unchecked, 0.1s Time] [2022-11-20 09:31:14,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-20 09:31:14,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2022-11-20 09:31:14,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 41 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:14,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2022-11-20 09:31:14,523 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 25 [2022-11-20 09:31:14,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:14,524 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2022-11-20 09:31:14,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:14,524 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2022-11-20 09:31:14,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-20 09:31:14,524 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:14,525 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:14,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 09:31:14,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-20 09:31:14,725 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:31:14,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:14,726 INFO L85 PathProgramCache]: Analyzing trace with hash 2111640895, now seen corresponding path program 4 times [2022-11-20 09:31:14,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:31:14,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960601431] [2022-11-20 09:31:14,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:14,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:31:14,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:15,199 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:15,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:31:15,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960601431] [2022-11-20 09:31:15,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960601431] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:31:15,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220942992] [2022-11-20 09:31:15,200 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 09:31:15,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:31:15,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:31:15,202 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:31:15,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 09:31:15,290 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 09:31:15,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:31:15,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-20 09:31:15,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:15,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 09:31:15,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:31:15,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-11-20 09:31:15,615 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:15,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:31:15,881 INFO L350 Elim1Store]: Elim1 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 23 treesize of output 21 [2022-11-20 09:31:15,885 INFO L350 Elim1Store]: Elim1 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 54 treesize of output 50 [2022-11-20 09:31:15,967 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:15,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220942992] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:31:15,968 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:31:15,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 13] total 26 [2022-11-20 09:31:15,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399547569] [2022-11-20 09:31:15,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:31:15,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-20 09:31:15,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:31:15,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-20 09:31:15,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2022-11-20 09:31:15,974 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:16,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:16,833 INFO L93 Difference]: Finished difference Result 94 states and 101 transitions. [2022-11-20 09:31:16,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-20 09:31:16,834 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-20 09:31:16,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:16,835 INFO L225 Difference]: With dead ends: 94 [2022-11-20 09:31:16,835 INFO L226 Difference]: Without dead ends: 92 [2022-11-20 09:31:16,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=339, Invalid=2211, Unknown=0, NotChecked=0, Total=2550 [2022-11-20 09:31:16,837 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 130 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:16,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 198 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 314 Invalid, 0 Unknown, 117 Unchecked, 0.2s Time] [2022-11-20 09:31:16,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-11-20 09:31:16,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 47. [2022-11-20 09:31:16,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.173913043478261) internal successors, (54), 46 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:16,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2022-11-20 09:31:16,848 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 28 [2022-11-20 09:31:16,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:16,848 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2022-11-20 09:31:16,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:16,849 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2022-11-20 09:31:16,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-20 09:31:16,849 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:16,850 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:16,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 09:31:17,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:31:17,056 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:31:17,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:17,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1174132026, now seen corresponding path program 2 times [2022-11-20 09:31:17,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:31:17,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490173701] [2022-11-20 09:31:17,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:17,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:31:17,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:17,185 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:17,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:31:17,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490173701] [2022-11-20 09:31:17,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490173701] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:31:17,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482127264] [2022-11-20 09:31:17,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:31:17,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:31:17,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:31:17,188 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:31:17,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 09:31:17,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:31:17,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:31:17,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 09:31:17,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:17,329 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:17,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:31:17,459 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:17,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482127264] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:31:17,459 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:31:17,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-11-20 09:31:17,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113967029] [2022-11-20 09:31:17,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:31:17,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 09:31:17,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:31:17,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 09:31:17,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-11-20 09:31:17,461 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:17,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:17,638 INFO L93 Difference]: Finished difference Result 179 states and 204 transitions. [2022-11-20 09:31:17,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 09:31:17,639 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-11-20 09:31:17,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:17,640 INFO L225 Difference]: With dead ends: 179 [2022-11-20 09:31:17,640 INFO L226 Difference]: Without dead ends: 163 [2022-11-20 09:31:17,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-11-20 09:31:17,641 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 222 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:17,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 81 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 09:31:17,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-11-20 09:31:17,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 71. [2022-11-20 09:31:17,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.2285714285714286) internal successors, (86), 70 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:17,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 86 transitions. [2022-11-20 09:31:17,656 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 86 transitions. Word has length 29 [2022-11-20 09:31:17,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:17,656 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 86 transitions. [2022-11-20 09:31:17,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:17,656 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 86 transitions. [2022-11-20 09:31:17,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-20 09:31:17,657 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:17,657 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:17,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 09:31:17,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-20 09:31:17,863 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:31:17,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:17,863 INFO L85 PathProgramCache]: Analyzing trace with hash 2074446645, now seen corresponding path program 5 times [2022-11-20 09:31:17,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:31:17,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101158896] [2022-11-20 09:31:17,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:17,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:31:17,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:18,268 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:18,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:31:18,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101158896] [2022-11-20 09:31:18,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101158896] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:31:18,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743346428] [2022-11-20 09:31:18,269 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 09:31:18,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:31:18,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:31:18,270 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:31:18,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 09:31:18,369 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-11-20 09:31:18,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:31:18,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-20 09:31:18,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:18,444 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 15 [2022-11-20 09:31:18,619 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:18,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:31:18,736 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 14 [2022-11-20 09:31:18,738 INFO L350 Elim1Store]: Elim1 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 20 treesize of output 16 [2022-11-20 09:31:18,826 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:18,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743346428] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:31:18,827 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:31:18,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 22 [2022-11-20 09:31:18,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828529263] [2022-11-20 09:31:18,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:31:18,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-20 09:31:18,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:31:18,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-20 09:31:18,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2022-11-20 09:31:18,829 INFO L87 Difference]: Start difference. First operand 71 states and 86 transitions. Second operand has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:19,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:19,308 INFO L93 Difference]: Finished difference Result 95 states and 109 transitions. [2022-11-20 09:31:19,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 09:31:19,309 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-11-20 09:31:19,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:19,310 INFO L225 Difference]: With dead ends: 95 [2022-11-20 09:31:19,310 INFO L226 Difference]: Without dead ends: 93 [2022-11-20 09:31:19,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 50 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=155, Invalid=901, Unknown=0, NotChecked=0, Total=1056 [2022-11-20 09:31:19,312 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 88 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:19,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 158 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 09:31:19,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-11-20 09:31:19,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 85. [2022-11-20 09:31:19,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.2023809523809523) internal successors, (101), 84 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:19,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 101 transitions. [2022-11-20 09:31:19,338 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 101 transitions. Word has length 32 [2022-11-20 09:31:19,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:19,340 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 101 transitions. [2022-11-20 09:31:19,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:19,340 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 101 transitions. [2022-11-20 09:31:19,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-20 09:31:19,343 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:19,344 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:19,354 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-20 09:31:19,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-20 09:31:19,550 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:31:19,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:19,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1583019745, now seen corresponding path program 6 times [2022-11-20 09:31:19,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:31:19,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288298195] [2022-11-20 09:31:19,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:19,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:31:19,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:20,124 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 3 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:20,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:31:20,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288298195] [2022-11-20 09:31:20,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288298195] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:31:20,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923543956] [2022-11-20 09:31:20,125 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 09:31:20,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:31:20,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:31:20,126 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:31:20,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 09:31:20,245 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-11-20 09:31:20,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:31:20,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-20 09:31:20,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:20,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 09:31:20,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:31:20,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-20 09:31:20,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:31:20,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-20 09:31:20,393 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-20 09:31:20,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-20 09:31:30,466 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 4 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:30,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:31:30,998 INFO L350 Elim1Store]: Elim1 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 23 treesize of output 21 [2022-11-20 09:31:31,002 INFO L350 Elim1Store]: Elim1 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 122 treesize of output 114 [2022-11-20 09:31:31,107 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 09:31:31,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923543956] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:31:31,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:31:31,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2022-11-20 09:31:31,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479392375] [2022-11-20 09:31:31,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:31:31,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-20 09:31:31,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:31:31,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-20 09:31:31,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=730, Unknown=2, NotChecked=0, Total=870 [2022-11-20 09:31:31,109 INFO L87 Difference]: Start difference. First operand 85 states and 101 transitions. Second operand has 30 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:31,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:31,335 INFO L93 Difference]: Finished difference Result 90 states and 104 transitions. [2022-11-20 09:31:31,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 09:31:31,336 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-20 09:31:31,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:31,337 INFO L225 Difference]: With dead ends: 90 [2022-11-20 09:31:31,337 INFO L226 Difference]: Without dead ends: 88 [2022-11-20 09:31:31,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 50 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=189, Invalid=999, Unknown=2, NotChecked=0, Total=1190 [2022-11-20 09:31:31,339 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 40 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:31,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 91 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 176 Invalid, 0 Unknown, 42 Unchecked, 0.1s Time] [2022-11-20 09:31:31,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-20 09:31:31,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 74. [2022-11-20 09:31:31,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.2191780821917808) internal successors, (89), 73 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:31,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 89 transitions. [2022-11-20 09:31:31,361 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 89 transitions. Word has length 34 [2022-11-20 09:31:31,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:31,362 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 89 transitions. [2022-11-20 09:31:31,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:31,362 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 89 transitions. [2022-11-20 09:31:31,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-20 09:31:31,367 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:31,367 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:31,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 09:31:31,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-20 09:31:31,573 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:31:31,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:31,573 INFO L85 PathProgramCache]: Analyzing trace with hash -743041493, now seen corresponding path program 7 times [2022-11-20 09:31:31,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:31:31,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010945784] [2022-11-20 09:31:31,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:31,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:31:31,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:31,771 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 19 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:31,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:31:31,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010945784] [2022-11-20 09:31:31,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010945784] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:31:31,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766958147] [2022-11-20 09:31:31,772 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 09:31:31,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:31:31,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:31:31,773 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:31:31,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 09:31:31,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:31,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 09:31:31,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:32,017 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 32 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:32,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:31:32,139 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 32 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:32,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766958147] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:31:32,139 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:31:32,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-11-20 09:31:32,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43116389] [2022-11-20 09:31:32,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:31:32,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 09:31:32,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:31:32,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 09:31:32,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2022-11-20 09:31:32,141 INFO L87 Difference]: Start difference. First operand 74 states and 89 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:32,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:32,310 INFO L93 Difference]: Finished difference Result 108 states and 122 transitions. [2022-11-20 09:31:32,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 09:31:32,310 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-11-20 09:31:32,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:32,312 INFO L225 Difference]: With dead ends: 108 [2022-11-20 09:31:32,312 INFO L226 Difference]: Without dead ends: 84 [2022-11-20 09:31:32,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 55 SyntacticMatches, 10 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2022-11-20 09:31:32,314 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 101 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:32,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 83 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 09:31:32,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-11-20 09:31:32,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 74. [2022-11-20 09:31:32,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.2054794520547945) internal successors, (88), 73 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:32,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 88 transitions. [2022-11-20 09:31:32,332 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 88 transitions. Word has length 36 [2022-11-20 09:31:32,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:32,332 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 88 transitions. [2022-11-20 09:31:32,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:32,332 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 88 transitions. [2022-11-20 09:31:32,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-20 09:31:32,334 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:32,334 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:32,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 09:31:32,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-20 09:31:32,539 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:31:32,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:32,540 INFO L85 PathProgramCache]: Analyzing trace with hash 632743168, now seen corresponding path program 8 times [2022-11-20 09:31:32,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:31:32,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727256574] [2022-11-20 09:31:32,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:32,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:31:32,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:32,963 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:32,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:31:32,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727256574] [2022-11-20 09:31:32,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727256574] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:31:32,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935183972] [2022-11-20 09:31:32,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:31:32,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:31:32,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:31:32,965 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:31:32,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 09:31:33,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:31:33,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:31:33,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-20 09:31:33,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:33,184 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2022-11-20 09:31:33,516 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:33,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:31:33,592 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 14 [2022-11-20 09:31:33,595 INFO L350 Elim1Store]: Elim1 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 20 treesize of output 16 [2022-11-20 09:31:33,653 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:33,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935183972] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:31:33,654 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:31:33,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 28 [2022-11-20 09:31:33,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454367088] [2022-11-20 09:31:33,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:31:33,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-20 09:31:33,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:31:33,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-20 09:31:33,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2022-11-20 09:31:33,656 INFO L87 Difference]: Start difference. First operand 74 states and 88 transitions. Second operand has 28 states, 28 states have (on average 2.9285714285714284) internal successors, (82), 28 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:34,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:34,176 INFO L93 Difference]: Finished difference Result 86 states and 99 transitions. [2022-11-20 09:31:34,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-20 09:31:34,176 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.9285714285714284) internal successors, (82), 28 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-11-20 09:31:34,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:34,177 INFO L225 Difference]: With dead ends: 86 [2022-11-20 09:31:34,177 INFO L226 Difference]: Without dead ends: 84 [2022-11-20 09:31:34,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=199, Invalid=1441, Unknown=0, NotChecked=0, Total=1640 [2022-11-20 09:31:34,184 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 106 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:34,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 198 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 09:31:34,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-11-20 09:31:34,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 78. [2022-11-20 09:31:34,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.1948051948051948) internal successors, (92), 77 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:34,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 92 transitions. [2022-11-20 09:31:34,206 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 92 transitions. Word has length 39 [2022-11-20 09:31:34,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:34,206 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 92 transitions. [2022-11-20 09:31:34,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.9285714285714284) internal successors, (82), 28 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:34,207 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 92 transitions. [2022-11-20 09:31:34,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-20 09:31:34,207 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:34,207 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:34,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 09:31:34,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:31:34,413 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:31:34,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:34,414 INFO L85 PathProgramCache]: Analyzing trace with hash -23096714, now seen corresponding path program 9 times [2022-11-20 09:31:34,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:31:34,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279497875] [2022-11-20 09:31:34,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:34,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:31:34,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:34,631 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 33 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:34,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:31:34,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279497875] [2022-11-20 09:31:34,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279497875] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:31:34,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031707910] [2022-11-20 09:31:34,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:31:34,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:31:34,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:31:34,633 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:31:34,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 09:31:34,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-20 09:31:34,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:31:34,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 09:31:34,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:34,990 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 50 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:34,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:31:35,151 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 50 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:35,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031707910] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:31:35,151 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:31:35,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2022-11-20 09:31:35,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926917014] [2022-11-20 09:31:35,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:31:35,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-20 09:31:35,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:31:35,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-20 09:31:35,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2022-11-20 09:31:35,153 INFO L87 Difference]: Start difference. First operand 78 states and 92 transitions. Second operand has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 23 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:35,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:35,347 INFO L93 Difference]: Finished difference Result 116 states and 129 transitions. [2022-11-20 09:31:35,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 09:31:35,348 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 23 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-11-20 09:31:35,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:35,349 INFO L225 Difference]: With dead ends: 116 [2022-11-20 09:31:35,349 INFO L226 Difference]: Without dead ends: 88 [2022-11-20 09:31:35,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 66 SyntacticMatches, 12 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2022-11-20 09:31:35,350 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 124 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:35,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 98 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 09:31:35,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-20 09:31:35,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 78. [2022-11-20 09:31:35,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.1818181818181819) internal successors, (91), 77 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:35,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 91 transitions. [2022-11-20 09:31:35,392 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 91 transitions. Word has length 43 [2022-11-20 09:31:35,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:35,393 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 91 transitions. [2022-11-20 09:31:35,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 23 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:35,394 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 91 transitions. [2022-11-20 09:31:35,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-20 09:31:35,394 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:35,395 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:35,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-20 09:31:35,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-20 09:31:35,601 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:31:35,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:35,601 INFO L85 PathProgramCache]: Analyzing trace with hash 219503105, now seen corresponding path program 10 times [2022-11-20 09:31:35,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:31:35,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148261291] [2022-11-20 09:31:35,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:35,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:31:35,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:36,099 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:36,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:31:36,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148261291] [2022-11-20 09:31:36,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148261291] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:31:36,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559598440] [2022-11-20 09:31:36,099 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 09:31:36,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:31:36,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:31:36,104 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:31:36,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-20 09:31:36,188 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 09:31:36,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:31:36,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-20 09:31:36,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:36,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 09:31:36,524 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:36,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:31:36,634 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 14 [2022-11-20 09:31:36,637 INFO L350 Elim1Store]: Elim1 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 20 treesize of output 16 [2022-11-20 09:31:36,698 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:36,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559598440] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:31:36,698 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:31:36,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 25 [2022-11-20 09:31:36,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223355343] [2022-11-20 09:31:36,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:31:36,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-20 09:31:36,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:31:36,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-20 09:31:36,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-11-20 09:31:36,700 INFO L87 Difference]: Start difference. First operand 78 states and 91 transitions. Second operand has 25 states, 25 states have (on average 2.96) internal successors, (74), 25 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:37,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:37,409 INFO L93 Difference]: Finished difference Result 90 states and 102 transitions. [2022-11-20 09:31:37,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-20 09:31:37,409 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.96) internal successors, (74), 25 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-11-20 09:31:37,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:37,410 INFO L225 Difference]: With dead ends: 90 [2022-11-20 09:31:37,410 INFO L226 Difference]: Without dead ends: 88 [2022-11-20 09:31:37,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 79 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=210, Invalid=1682, Unknown=0, NotChecked=0, Total=1892 [2022-11-20 09:31:37,411 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 78 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:37,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 194 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 09:31:37,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-20 09:31:37,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 82. [2022-11-20 09:31:37,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.1728395061728396) internal successors, (95), 81 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:37,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 95 transitions. [2022-11-20 09:31:37,428 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 95 transitions. Word has length 46 [2022-11-20 09:31:37,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:37,429 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 95 transitions. [2022-11-20 09:31:37,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.96) internal successors, (74), 25 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:37,429 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 95 transitions. [2022-11-20 09:31:37,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-20 09:31:37,429 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:37,430 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:37,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-20 09:31:37,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-20 09:31:37,637 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:31:37,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:37,637 INFO L85 PathProgramCache]: Analyzing trace with hash 2009702135, now seen corresponding path program 11 times [2022-11-20 09:31:37,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:31:37,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528195301] [2022-11-20 09:31:37,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:37,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:31:37,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:37,903 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 51 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:37,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:31:37,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528195301] [2022-11-20 09:31:37,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528195301] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:31:37,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871732132] [2022-11-20 09:31:37,904 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 09:31:37,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:31:37,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:31:37,905 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:31:37,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-20 09:31:38,023 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-11-20 09:31:38,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:31:38,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 09:31:38,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:38,278 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 72 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:38,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:31:38,469 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 72 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:38,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871732132] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:31:38,469 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:31:38,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2022-11-20 09:31:38,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339668449] [2022-11-20 09:31:38,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:31:38,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-20 09:31:38,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:31:38,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-20 09:31:38,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2022-11-20 09:31:38,471 INFO L87 Difference]: Start difference. First operand 82 states and 95 transitions. Second operand has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 26 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:38,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:38,685 INFO L93 Difference]: Finished difference Result 124 states and 136 transitions. [2022-11-20 09:31:38,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-20 09:31:38,685 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 26 states have internal predecessors, (85), 0 states have call successors, (0), 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 50 [2022-11-20 09:31:38,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:38,686 INFO L225 Difference]: With dead ends: 124 [2022-11-20 09:31:38,686 INFO L226 Difference]: Without dead ends: 92 [2022-11-20 09:31:38,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 77 SyntacticMatches, 14 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2022-11-20 09:31:38,687 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 123 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:38,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 106 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 09:31:38,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-11-20 09:31:38,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 82. [2022-11-20 09:31:38,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.1604938271604939) internal successors, (94), 81 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:38,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 94 transitions. [2022-11-20 09:31:38,730 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 94 transitions. Word has length 50 [2022-11-20 09:31:38,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:38,730 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 94 transitions. [2022-11-20 09:31:38,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 26 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:38,731 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 94 transitions. [2022-11-20 09:31:38,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-20 09:31:38,731 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:38,731 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:38,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-20 09:31:38,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-20 09:31:38,935 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:31:38,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:38,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1663478516, now seen corresponding path program 12 times [2022-11-20 09:31:38,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:31:38,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683616772] [2022-11-20 09:31:38,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:38,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:31:38,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:39,446 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:39,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:31:39,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683616772] [2022-11-20 09:31:39,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683616772] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:31:39,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139740720] [2022-11-20 09:31:39,447 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 09:31:39,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:31:39,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:31:39,452 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:31:39,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-20 09:31:39,666 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-11-20 09:31:39,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:31:39,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-20 09:31:39,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:39,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 09:31:40,641 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-20 09:31:40,642 INFO L350 Elim1Store]: Elim1 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 44 treesize of output 23 [2022-11-20 09:31:40,676 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 66 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:40,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:31:41,579 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 16 [2022-11-20 09:31:41,582 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 20 [2022-11-20 09:31:41,729 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 60 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:41,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139740720] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:31:41,729 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:31:41,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 20] total 47 [2022-11-20 09:31:41,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595588360] [2022-11-20 09:31:41,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:31:41,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-20 09:31:41,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:31:41,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-20 09:31:41,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1886, Unknown=0, NotChecked=0, Total=2162 [2022-11-20 09:31:41,732 INFO L87 Difference]: Start difference. First operand 82 states and 94 transitions. Second operand has 47 states, 47 states have (on average 2.8085106382978724) internal successors, (132), 47 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:42,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:42,707 INFO L93 Difference]: Finished difference Result 115 states and 127 transitions. [2022-11-20 09:31:42,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-20 09:31:42,707 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.8085106382978724) internal successors, (132), 47 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-11-20 09:31:42,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:42,708 INFO L225 Difference]: With dead ends: 115 [2022-11-20 09:31:42,708 INFO L226 Difference]: Without dead ends: 83 [2022-11-20 09:31:42,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 83 SyntacticMatches, 7 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1026 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=554, Invalid=4138, Unknown=0, NotChecked=0, Total=4692 [2022-11-20 09:31:42,709 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 49 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 115 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:42,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 239 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 271 Invalid, 0 Unknown, 115 Unchecked, 0.2s Time] [2022-11-20 09:31:42,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-11-20 09:31:42,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2022-11-20 09:31:42,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.1481481481481481) internal successors, (93), 81 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:42,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 93 transitions. [2022-11-20 09:31:42,725 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 93 transitions. Word has length 53 [2022-11-20 09:31:42,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:42,726 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 93 transitions. [2022-11-20 09:31:42,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.8085106382978724) internal successors, (132), 47 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:42,728 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 93 transitions. [2022-11-20 09:31:42,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-20 09:31:42,730 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:42,730 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:42,743 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-11-20 09:31:42,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-20 09:31:42,936 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:31:42,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:42,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1657881786, now seen corresponding path program 3 times [2022-11-20 09:31:42,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:31:42,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219484611] [2022-11-20 09:31:42,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:42,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:31:42,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:43,208 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 29 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:43,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:31:43,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219484611] [2022-11-20 09:31:43,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219484611] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:31:43,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059189446] [2022-11-20 09:31:43,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:31:43,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:31:43,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:31:43,210 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:31:43,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-20 09:31:43,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 09:31:43,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:31:43,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 09:31:43,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:43,427 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 29 proven. 14 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2022-11-20 09:31:43,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:31:43,541 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 29 proven. 14 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2022-11-20 09:31:43,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059189446] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:31:43,541 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:31:43,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 4, 4] total 23 [2022-11-20 09:31:43,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625106211] [2022-11-20 09:31:43,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:31:43,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-20 09:31:43,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:31:43,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-20 09:31:43,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=325, Unknown=0, NotChecked=0, Total=506 [2022-11-20 09:31:43,543 INFO L87 Difference]: Start difference. First operand 82 states and 93 transitions. Second operand has 23 states, 23 states have (on average 3.0) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:44,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:44,031 INFO L93 Difference]: Finished difference Result 178 states and 192 transitions. [2022-11-20 09:31:44,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 09:31:44,031 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-11-20 09:31:44,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:44,032 INFO L225 Difference]: With dead ends: 178 [2022-11-20 09:31:44,032 INFO L226 Difference]: Without dead ends: 146 [2022-11-20 09:31:44,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=1045, Unknown=0, NotChecked=0, Total=1640 [2022-11-20 09:31:44,034 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 480 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:44,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [480 Valid, 64 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 09:31:44,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-11-20 09:31:44,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 57. [2022-11-20 09:31:44,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 56 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:44,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2022-11-20 09:31:44,048 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 53 [2022-11-20 09:31:44,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:44,048 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2022-11-20 09:31:44,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:44,049 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2022-11-20 09:31:44,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-20 09:31:44,049 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:44,049 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:44,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-20 09:31:44,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:31:44,251 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:31:44,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:44,252 INFO L85 PathProgramCache]: Analyzing trace with hash 2083482327, now seen corresponding path program 13 times [2022-11-20 09:31:44,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:31:44,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918469030] [2022-11-20 09:31:44,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:44,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:31:44,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:44,871 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:44,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:31:44,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918469030] [2022-11-20 09:31:44,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918469030] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:31:44,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883389169] [2022-11-20 09:31:44,872 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 09:31:44,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:31:44,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:31:44,876 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:31:44,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-20 09:31:44,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:44,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-20 09:31:44,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:45,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 09:31:45,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:31:45,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-20 09:31:45,750 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:45,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:31:45,897 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 14 [2022-11-20 09:31:45,899 INFO L350 Elim1Store]: Elim1 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 20 treesize of output 16 [2022-11-20 09:31:45,965 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:45,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883389169] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:31:45,966 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:31:45,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 20] total 39 [2022-11-20 09:31:45,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940752052] [2022-11-20 09:31:45,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:31:45,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-20 09:31:45,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:31:45,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-20 09:31:45,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1340, Unknown=0, NotChecked=0, Total=1482 [2022-11-20 09:31:45,968 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 39 states, 39 states have (on average 2.9743589743589745) internal successors, (116), 39 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:46,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:46,787 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2022-11-20 09:31:46,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-20 09:31:46,788 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.9743589743589745) internal successors, (116), 39 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-11-20 09:31:46,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:46,788 INFO L225 Difference]: With dead ends: 66 [2022-11-20 09:31:46,788 INFO L226 Difference]: Without dead ends: 64 [2022-11-20 09:31:46,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 89 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=283, Invalid=2797, Unknown=0, NotChecked=0, Total=3080 [2022-11-20 09:31:46,790 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 148 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 1055 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 1102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:46,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 379 Invalid, 1102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1055 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 09:31:46,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-20 09:31:46,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2022-11-20 09:31:46,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 60 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:46,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2022-11-20 09:31:46,804 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 56 [2022-11-20 09:31:46,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:46,805 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2022-11-20 09:31:46,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.9743589743589745) internal successors, (116), 39 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:46,805 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2022-11-20 09:31:46,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-20 09:31:46,805 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:46,806 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:46,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-20 09:31:47,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2022-11-20 09:31:47,011 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:31:47,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:47,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1222421299, now seen corresponding path program 14 times [2022-11-20 09:31:47,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:31:47,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038467114] [2022-11-20 09:31:47,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:47,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:31:47,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:47,625 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:47,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:31:47,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038467114] [2022-11-20 09:31:47,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038467114] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:31:47,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639709862] [2022-11-20 09:31:47,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:31:47,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:31:47,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:31:47,628 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:31:47,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-20 09:31:47,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:31:47,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:31:47,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-20 09:31:47,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:48,036 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2022-11-20 09:31:48,555 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:48,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:31:48,654 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 14 [2022-11-20 09:31:48,657 INFO L350 Elim1Store]: Elim1 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 20 treesize of output 16 [2022-11-20 09:31:48,744 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:48,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639709862] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:31:48,745 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:31:48,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 40 [2022-11-20 09:31:48,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032223018] [2022-11-20 09:31:48,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:31:48,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-20 09:31:48,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:31:48,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-20 09:31:48,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1425, Unknown=0, NotChecked=0, Total=1560 [2022-11-20 09:31:48,747 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 40 states, 40 states have (on average 3.1) internal successors, (124), 40 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:49,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:49,705 INFO L93 Difference]: Finished difference Result 72 states and 73 transitions. [2022-11-20 09:31:49,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-20 09:31:49,705 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.1) internal successors, (124), 40 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-11-20 09:31:49,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:49,706 INFO L225 Difference]: With dead ends: 72 [2022-11-20 09:31:49,706 INFO L226 Difference]: Without dead ends: 70 [2022-11-20 09:31:49,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=286, Invalid=3136, Unknown=0, NotChecked=0, Total=3422 [2022-11-20 09:31:49,708 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 98 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 1191 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 1221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:49,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 405 Invalid, 1221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1191 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 09:31:49,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-11-20 09:31:49,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2022-11-20 09:31:49,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.03125) internal successors, (66), 64 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) [2022-11-20 09:31:49,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2022-11-20 09:31:49,722 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 60 [2022-11-20 09:31:49,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:49,723 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2022-11-20 09:31:49,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.1) internal successors, (124), 40 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:49,723 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2022-11-20 09:31:49,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-20 09:31:49,723 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:49,723 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:49,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-20 09:31:49,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:31:49,924 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:31:49,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:49,924 INFO L85 PathProgramCache]: Analyzing trace with hash 562385859, now seen corresponding path program 15 times [2022-11-20 09:31:49,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:31:49,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816532720] [2022-11-20 09:31:49,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:49,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:31:49,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:50,286 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 99 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:50,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:31:50,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816532720] [2022-11-20 09:31:50,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816532720] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:31:50,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946526202] [2022-11-20 09:31:50,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:31:50,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:31:50,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:31:50,292 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:31:50,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-20 09:31:50,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-20 09:31:50,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:31:50,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 09:31:50,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:50,867 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 128 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:50,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:31:51,116 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 128 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:51,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946526202] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:31:51,116 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:31:51,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2022-11-20 09:31:51,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257958819] [2022-11-20 09:31:51,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:31:51,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-20 09:31:51,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:31:51,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-20 09:31:51,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2022-11-20 09:31:51,118 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 32 states, 32 states have (on average 3.34375) internal successors, (107), 32 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:51,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:51,380 INFO L93 Difference]: Finished difference Result 118 states and 120 transitions. [2022-11-20 09:31:51,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-20 09:31:51,381 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.34375) internal successors, (107), 32 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-11-20 09:31:51,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:51,381 INFO L225 Difference]: With dead ends: 118 [2022-11-20 09:31:51,381 INFO L226 Difference]: Without dead ends: 78 [2022-11-20 09:31:51,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 99 SyntacticMatches, 18 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=407, Invalid=1233, Unknown=0, NotChecked=0, Total=1640 [2022-11-20 09:31:51,383 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 151 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:51,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 136 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 09:31:51,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-20 09:31:51,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 68. [2022-11-20 09:31:51,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 67 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:51,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2022-11-20 09:31:51,399 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 64 [2022-11-20 09:31:51,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:51,399 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2022-11-20 09:31:51,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.34375) internal successors, (107), 32 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:51,400 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2022-11-20 09:31:51,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-20 09:31:51,400 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:51,401 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:51,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-20 09:31:51,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:31:51,606 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:31:51,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:51,607 INFO L85 PathProgramCache]: Analyzing trace with hash 484327704, now seen corresponding path program 16 times [2022-11-20 09:31:51,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:31:51,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263436809] [2022-11-20 09:31:51,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:51,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:31:51,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:52,315 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:52,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:31:52,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263436809] [2022-11-20 09:31:52,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263436809] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:31:52,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916868171] [2022-11-20 09:31:52,315 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 09:31:52,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:31:52,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:31:52,316 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:31:52,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-20 09:31:52,415 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 09:31:52,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:31:52,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-20 09:31:52,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:52,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 09:31:52,982 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:52,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:31:53,137 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 14 [2022-11-20 09:31:53,147 INFO L350 Elim1Store]: Elim1 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 20 treesize of output 16 [2022-11-20 09:31:53,239 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:53,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916868171] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:31:53,240 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:31:53,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 34 [2022-11-20 09:31:53,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976195325] [2022-11-20 09:31:53,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:31:53,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 09:31:53,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:31:53,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 09:31:53,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1022, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 09:31:53,245 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand has 34 states, 34 states have (on average 3.1470588235294117) internal successors, (107), 34 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:54,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:54,265 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2022-11-20 09:31:54,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-20 09:31:54,265 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.1470588235294117) internal successors, (107), 34 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-11-20 09:31:54,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:54,265 INFO L225 Difference]: With dead ends: 79 [2022-11-20 09:31:54,266 INFO L226 Difference]: Without dead ends: 77 [2022-11-20 09:31:54,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 118 SyntacticMatches, 5 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=265, Invalid=3041, Unknown=0, NotChecked=0, Total=3306 [2022-11-20 09:31:54,267 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 107 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 1098 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 1130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1098 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:54,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 365 Invalid, 1130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1098 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 09:31:54,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-11-20 09:31:54,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 72. [2022-11-20 09:31:54,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.028169014084507) internal successors, (73), 71 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:54,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2022-11-20 09:31:54,286 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 67 [2022-11-20 09:31:54,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:54,286 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2022-11-20 09:31:54,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.1470588235294117) internal successors, (107), 34 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:54,286 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2022-11-20 09:31:54,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-20 09:31:54,287 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:54,287 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:54,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-20 09:31:54,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:31:54,493 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:31:54,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:54,493 INFO L85 PathProgramCache]: Analyzing trace with hash 470491790, now seen corresponding path program 17 times [2022-11-20 09:31:54,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:31:54,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344568423] [2022-11-20 09:31:54,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:54,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:31:54,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:54,910 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 129 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:54,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:31:54,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344568423] [2022-11-20 09:31:54,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344568423] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:31:54,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056528252] [2022-11-20 09:31:54,911 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 09:31:54,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:31:54,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:31:54,916 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:31:54,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-20 09:31:55,136 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-11-20 09:31:55,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:31:55,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 09:31:55,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:55,525 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 162 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:55,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:31:55,783 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 162 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:55,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056528252] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:31:55,783 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:31:55,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2022-11-20 09:31:55,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394004588] [2022-11-20 09:31:55,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:31:55,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-20 09:31:55,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:31:55,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-20 09:31:55,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=899, Unknown=0, NotChecked=0, Total=1190 [2022-11-20 09:31:55,785 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 35 states, 35 states have (on average 3.3714285714285714) internal successors, (118), 35 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:56,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:56,072 INFO L93 Difference]: Finished difference Result 129 states and 131 transitions. [2022-11-20 09:31:56,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-20 09:31:56,073 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.3714285714285714) internal successors, (118), 35 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-11-20 09:31:56,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:56,073 INFO L225 Difference]: With dead ends: 129 [2022-11-20 09:31:56,073 INFO L226 Difference]: Without dead ends: 85 [2022-11-20 09:31:56,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 110 SyntacticMatches, 20 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 910 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=486, Invalid=1494, Unknown=0, NotChecked=0, Total=1980 [2022-11-20 09:31:56,075 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 219 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:56,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 134 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 09:31:56,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-11-20 09:31:56,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 75. [2022-11-20 09:31:56,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.027027027027027) internal successors, (76), 74 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:56,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2022-11-20 09:31:56,103 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 71 [2022-11-20 09:31:56,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:56,104 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2022-11-20 09:31:56,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.3714285714285714) internal successors, (118), 35 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:56,104 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2022-11-20 09:31:56,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-20 09:31:56,105 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:56,105 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:56,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-20 09:31:56,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:31:56,311 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:31:56,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:56,311 INFO L85 PathProgramCache]: Analyzing trace with hash 570522521, now seen corresponding path program 18 times [2022-11-20 09:31:56,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:31:56,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705460508] [2022-11-20 09:31:56,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:56,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:31:56,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:57,039 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 0 proven. 307 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:57,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:31:57,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705460508] [2022-11-20 09:31:57,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705460508] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:31:57,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387250141] [2022-11-20 09:31:57,039 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 09:31:57,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:31:57,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:31:57,041 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:31:57,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-20 09:31:57,844 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-11-20 09:31:57,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:31:57,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-20 09:31:57,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:58,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 09:31:59,627 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-20 09:31:59,628 INFO L350 Elim1Store]: Elim1 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 44 treesize of output 23 [2022-11-20 09:31:59,669 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 153 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:59,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:32:01,034 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 16 [2022-11-20 09:32:01,037 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 20 [2022-11-20 09:32:01,352 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 144 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:01,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387250141] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:32:01,353 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:32:01,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 26] total 62 [2022-11-20 09:32:01,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352794757] [2022-11-20 09:32:01,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:32:01,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-11-20 09:32:01,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:32:01,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-11-20 09:32:01,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=3332, Unknown=0, NotChecked=0, Total=3782 [2022-11-20 09:32:01,355 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 62 states, 62 states have (on average 3.0) internal successors, (186), 62 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:02,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:32:02,883 INFO L93 Difference]: Finished difference Result 122 states and 124 transitions. [2022-11-20 09:32:02,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-20 09:32:02,884 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 3.0) internal successors, (186), 62 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2022-11-20 09:32:02,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:32:02,885 INFO L225 Difference]: With dead ends: 122 [2022-11-20 09:32:02,885 INFO L226 Difference]: Without dead ends: 78 [2022-11-20 09:32:02,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 119 SyntacticMatches, 10 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1794 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=905, Invalid=7651, Unknown=0, NotChecked=0, Total=8556 [2022-11-20 09:32:02,888 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 39 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 197 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 09:32:02,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 507 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 413 Invalid, 0 Unknown, 197 Unchecked, 0.2s Time] [2022-11-20 09:32:02,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-20 09:32:02,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-11-20 09:32:02,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.025974025974026) internal successors, (79), 77 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:02,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2022-11-20 09:32:02,908 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 74 [2022-11-20 09:32:02,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:32:02,908 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2022-11-20 09:32:02,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 3.0) internal successors, (186), 62 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:02,908 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2022-11-20 09:32:02,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-20 09:32:02,909 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:32:02,909 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:32:02,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-20 09:32:03,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-20 09:32:03,116 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:32:03,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:32:03,116 INFO L85 PathProgramCache]: Analyzing trace with hash -121273682, now seen corresponding path program 19 times [2022-11-20 09:32:03,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:32:03,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291354095] [2022-11-20 09:32:03,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:32:03,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:32:03,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:32:04,011 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:04,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:32:04,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291354095] [2022-11-20 09:32:04,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291354095] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:32:04,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969207479] [2022-11-20 09:32:04,012 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 09:32:04,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:32:04,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:32:04,020 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:32:04,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-20 09:32:04,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:32:04,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-20 09:32:04,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:32:04,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 09:32:04,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:32:04,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-20 09:32:05,369 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:05,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:32:05,585 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 14 [2022-11-20 09:32:05,588 INFO L350 Elim1Store]: Elim1 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 20 treesize of output 16 [2022-11-20 09:32:05,711 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:05,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969207479] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:32:05,712 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:32:05,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 26] total 51 [2022-11-20 09:32:05,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514048178] [2022-11-20 09:32:05,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:32:05,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-20 09:32:05,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:32:05,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-20 09:32:05,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=2363, Unknown=0, NotChecked=0, Total=2550 [2022-11-20 09:32:05,714 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand has 51 states, 51 states have (on average 3.0980392156862746) internal successors, (158), 51 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:07,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:32:07,089 INFO L93 Difference]: Finished difference Result 87 states and 88 transitions. [2022-11-20 09:32:07,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-20 09:32:07,091 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.0980392156862746) internal successors, (158), 51 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2022-11-20 09:32:07,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:32:07,092 INFO L225 Difference]: With dead ends: 87 [2022-11-20 09:32:07,092 INFO L226 Difference]: Without dead ends: 85 [2022-11-20 09:32:07,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 125 SyntacticMatches, 4 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1277 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=373, Invalid=5029, Unknown=0, NotChecked=0, Total=5402 [2022-11-20 09:32:07,094 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 152 mSDsluCounter, 686 mSDsCounter, 0 mSdLazyCounter, 1933 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 1988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 09:32:07,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 713 Invalid, 1988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1933 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 09:32:07,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-11-20 09:32:07,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2022-11-20 09:32:07,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.0246913580246915) internal successors, (83), 81 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:07,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2022-11-20 09:32:07,127 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 77 [2022-11-20 09:32:07,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:32:07,127 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2022-11-20 09:32:07,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.0980392156862746) internal successors, (158), 51 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:07,128 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2022-11-20 09:32:07,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-20 09:32:07,128 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:32:07,128 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:32:07,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-20 09:32:07,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-20 09:32:07,335 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:32:07,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:32:07,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1219209508, now seen corresponding path program 20 times [2022-11-20 09:32:07,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:32:07,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582279092] [2022-11-20 09:32:07,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:32:07,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:32:07,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:32:08,204 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:08,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:32:08,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582279092] [2022-11-20 09:32:08,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582279092] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:32:08,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633693671] [2022-11-20 09:32:08,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:32:08,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:32:08,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:32:08,208 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:32:08,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-20 09:32:08,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:32:08,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:32:08,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-20 09:32:08,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:32:08,758 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2022-11-20 09:32:09,524 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:09,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:32:09,647 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 14 [2022-11-20 09:32:09,649 INFO L350 Elim1Store]: Elim1 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 20 treesize of output 16 [2022-11-20 09:32:09,754 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:09,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633693671] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:32:09,754 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:32:09,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 52 [2022-11-20 09:32:09,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061715102] [2022-11-20 09:32:09,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:32:09,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-20 09:32:09,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:32:09,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-20 09:32:09,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=2475, Unknown=0, NotChecked=0, Total=2652 [2022-11-20 09:32:09,756 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand has 52 states, 52 states have (on average 3.1923076923076925) internal successors, (166), 52 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:11,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:32:11,105 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2022-11-20 09:32:11,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-20 09:32:11,106 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.1923076923076925) internal successors, (166), 52 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2022-11-20 09:32:11,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:32:11,107 INFO L225 Difference]: With dead ends: 93 [2022-11-20 09:32:11,107 INFO L226 Difference]: Without dead ends: 91 [2022-11-20 09:32:11,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 135 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1323 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=373, Invalid=5479, Unknown=0, NotChecked=0, Total=5852 [2022-11-20 09:32:11,108 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 136 mSDsluCounter, 623 mSDsCounter, 0 mSdLazyCounter, 1850 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 652 SdHoareTripleChecker+Invalid, 1893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1850 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 09:32:11,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 652 Invalid, 1893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1850 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 09:32:11,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-11-20 09:32:11,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 86. [2022-11-20 09:32:11,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.0235294117647058) internal successors, (87), 85 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:11,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2022-11-20 09:32:11,129 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 81 [2022-11-20 09:32:11,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:32:11,129 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2022-11-20 09:32:11,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.1923076923076925) internal successors, (166), 52 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:11,129 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2022-11-20 09:32:11,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-20 09:32:11,130 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:32:11,130 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:32:11,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-20 09:32:11,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-20 09:32:11,331 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:32:11,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:32:11,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1401791642, now seen corresponding path program 21 times [2022-11-20 09:32:11,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:32:11,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990611051] [2022-11-20 09:32:11,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:32:11,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:32:11,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:32:11,846 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 201 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:11,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:32:11,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990611051] [2022-11-20 09:32:11,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990611051] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:32:11,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004980447] [2022-11-20 09:32:11,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:32:11,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:32:11,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:32:11,848 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:32:11,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-20 09:32:12,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-11-20 09:32:12,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:32:12,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-20 09:32:12,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:32:12,834 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 242 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:12,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:32:13,231 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 242 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:13,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004980447] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:32:13,231 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:32:13,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 41 [2022-11-20 09:32:13,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901023341] [2022-11-20 09:32:13,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:32:13,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-20 09:32:13,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:32:13,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-20 09:32:13,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=1245, Unknown=0, NotChecked=0, Total=1640 [2022-11-20 09:32:13,233 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand has 41 states, 41 states have (on average 3.4146341463414633) internal successors, (140), 41 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:13,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:32:13,602 INFO L93 Difference]: Finished difference Result 151 states and 153 transitions. [2022-11-20 09:32:13,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-20 09:32:13,602 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.4146341463414633) internal successors, (140), 41 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2022-11-20 09:32:13,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:32:13,603 INFO L225 Difference]: With dead ends: 151 [2022-11-20 09:32:13,603 INFO L226 Difference]: Without dead ends: 99 [2022-11-20 09:32:13,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 132 SyntacticMatches, 24 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1275 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=665, Invalid=2091, Unknown=0, NotChecked=0, Total=2756 [2022-11-20 09:32:13,604 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 177 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 09:32:13,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 214 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 09:32:13,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-11-20 09:32:13,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 89. [2022-11-20 09:32:13,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.0227272727272727) internal successors, (90), 88 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:13,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2022-11-20 09:32:13,622 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 85 [2022-11-20 09:32:13,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:32:13,622 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2022-11-20 09:32:13,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.4146341463414633) internal successors, (140), 41 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:13,623 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2022-11-20 09:32:13,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-20 09:32:13,624 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:32:13,624 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:32:13,632 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-11-20 09:32:13,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-20 09:32:13,831 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:32:13,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:32:13,831 INFO L85 PathProgramCache]: Analyzing trace with hash -681456027, now seen corresponding path program 22 times [2022-11-20 09:32:13,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:32:13,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255284631] [2022-11-20 09:32:13,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:32:13,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:32:13,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:32:14,783 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 0 proven. 452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:14,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:32:14,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255284631] [2022-11-20 09:32:14,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255284631] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:32:14,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203718925] [2022-11-20 09:32:14,784 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 09:32:14,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:32:14,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:32:14,785 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:32:14,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-20 09:32:14,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 09:32:14,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:32:14,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-20 09:32:14,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:32:15,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 09:32:15,752 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 0 proven. 452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:15,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:32:15,963 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 14 [2022-11-20 09:32:15,965 INFO L350 Elim1Store]: Elim1 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 20 treesize of output 16 [2022-11-20 09:32:16,089 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 0 proven. 452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:16,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203718925] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:32:16,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:32:16,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 43 [2022-11-20 09:32:16,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279092223] [2022-11-20 09:32:16,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:32:16,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-20 09:32:16,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:32:16,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-20 09:32:16,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1679, Unknown=0, NotChecked=0, Total=1806 [2022-11-20 09:32:16,091 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 43 states, 43 states have (on average 3.255813953488372) internal successors, (140), 43 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:17,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:32:17,713 INFO L93 Difference]: Finished difference Result 100 states and 101 transitions. [2022-11-20 09:32:17,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-11-20 09:32:17,713 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.255813953488372) internal successors, (140), 43 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2022-11-20 09:32:17,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:32:17,714 INFO L225 Difference]: With dead ends: 100 [2022-11-20 09:32:17,714 INFO L226 Difference]: Without dead ends: 98 [2022-11-20 09:32:17,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 157 SyntacticMatches, 5 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1041 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=328, Invalid=4928, Unknown=0, NotChecked=0, Total=5256 [2022-11-20 09:32:17,716 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 132 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 1983 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 691 SdHoareTripleChecker+Invalid, 2024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 09:32:17,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 691 Invalid, 2024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1983 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 09:32:17,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-11-20 09:32:17,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2022-11-20 09:32:17,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0217391304347827) internal successors, (94), 92 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:17,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2022-11-20 09:32:17,743 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 88 [2022-11-20 09:32:17,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:32:17,743 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2022-11-20 09:32:17,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.255813953488372) internal successors, (140), 43 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:17,744 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2022-11-20 09:32:17,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-20 09:32:17,744 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:32:17,744 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:32:17,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-20 09:32:17,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-20 09:32:17,945 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:32:17,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:32:17,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1539489445, now seen corresponding path program 23 times [2022-11-20 09:32:17,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:32:17,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933530617] [2022-11-20 09:32:17,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:32:17,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:32:17,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:32:18,509 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 243 proven. 255 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:18,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:32:18,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933530617] [2022-11-20 09:32:18,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933530617] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:32:18,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692160462] [2022-11-20 09:32:18,510 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 09:32:18,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:32:18,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:32:18,511 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:32:18,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-20 09:32:18,789 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2022-11-20 09:32:18,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:32:18,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-20 09:32:18,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:32:19,314 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 288 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:19,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:32:19,766 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 288 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:19,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692160462] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:32:19,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:32:19,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 44 [2022-11-20 09:32:19,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183763416] [2022-11-20 09:32:19,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:32:19,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-20 09:32:19,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:32:19,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-20 09:32:19,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=453, Invalid=1439, Unknown=0, NotChecked=0, Total=1892 [2022-11-20 09:32:19,768 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 44 states, 44 states have (on average 3.4318181818181817) internal successors, (151), 44 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:20,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:32:20,158 INFO L93 Difference]: Finished difference Result 162 states and 164 transitions. [2022-11-20 09:32:20,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-20 09:32:20,159 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.4318181818181817) internal successors, (151), 44 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-11-20 09:32:20,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:32:20,159 INFO L225 Difference]: With dead ends: 162 [2022-11-20 09:32:20,160 INFO L226 Difference]: Without dead ends: 106 [2022-11-20 09:32:20,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 143 SyntacticMatches, 26 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1480 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=765, Invalid=2427, Unknown=0, NotChecked=0, Total=3192 [2022-11-20 09:32:20,161 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 237 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 09:32:20,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 207 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 09:32:20,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-11-20 09:32:20,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 96. [2022-11-20 09:32:20,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0210526315789474) internal successors, (97), 95 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:20,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2022-11-20 09:32:20,178 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 92 [2022-11-20 09:32:20,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:32:20,178 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2022-11-20 09:32:20,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.4318181818181817) internal successors, (151), 44 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:20,178 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2022-11-20 09:32:20,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-20 09:32:20,179 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:32:20,179 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:32:20,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-20 09:32:20,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:32:20,380 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:32:20,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:32:20,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1504152880, now seen corresponding path program 24 times [2022-11-20 09:32:20,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:32:20,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071523003] [2022-11-20 09:32:20,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:32:20,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:32:20,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:32:21,682 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 0 proven. 535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:21,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:32:21,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071523003] [2022-11-20 09:32:21,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071523003] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:32:21,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325203726] [2022-11-20 09:32:21,683 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 09:32:21,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:32:21,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:32:21,688 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:32:21,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-20 09:32:23,075 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2022-11-20 09:32:23,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:32:23,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-20 09:32:23,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:32:23,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 09:32:25,147 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-20 09:32:25,148 INFO L350 Elim1Store]: Elim1 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 44 treesize of output 23 [2022-11-20 09:32:25,198 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 267 proven. 268 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:25,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:32:26,997 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 16 [2022-11-20 09:32:26,999 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 20 [2022-11-20 09:32:27,341 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 262 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:27,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325203726] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:32:27,341 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:32:27,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 33, 33] total 78 [2022-11-20 09:32:27,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977176915] [2022-11-20 09:32:27,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:32:27,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-11-20 09:32:27,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:32:27,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-11-20 09:32:27,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=830, Invalid=5176, Unknown=0, NotChecked=0, Total=6006 [2022-11-20 09:32:27,344 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand has 78 states, 78 states have (on average 3.076923076923077) internal successors, (240), 78 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:29,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:32:29,910 INFO L93 Difference]: Finished difference Result 155 states and 157 transitions. [2022-11-20 09:32:29,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-11-20 09:32:29,912 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 3.076923076923077) internal successors, (240), 78 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2022-11-20 09:32:29,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:32:29,912 INFO L225 Difference]: With dead ends: 155 [2022-11-20 09:32:29,912 INFO L226 Difference]: Without dead ends: 99 [2022-11-20 09:32:29,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 152 SyntacticMatches, 14 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4677 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=2071, Invalid=14185, Unknown=0, NotChecked=0, Total=16256 [2022-11-20 09:32:29,915 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 116 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 09:32:29,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 365 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 336 Invalid, 0 Unknown, 109 Unchecked, 0.2s Time] [2022-11-20 09:32:29,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-11-20 09:32:29,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2022-11-20 09:32:29,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.0204081632653061) internal successors, (100), 98 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:29,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2022-11-20 09:32:29,944 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 95 [2022-11-20 09:32:29,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:32:29,945 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2022-11-20 09:32:29,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 3.076923076923077) internal successors, (240), 78 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:29,945 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2022-11-20 09:32:29,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-20 09:32:29,946 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:32:29,946 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:32:29,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-20 09:32:30,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:32:30,147 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:32:30,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:32:30,148 INFO L85 PathProgramCache]: Analyzing trace with hash -696896197, now seen corresponding path program 25 times [2022-11-20 09:32:30,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:32:30,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100696969] [2022-11-20 09:32:30,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:32:30,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:32:30,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:32:31,598 INFO L134 CoverageAnalysis]: Checked inductivity of 575 backedges. 0 proven. 575 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:31,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:32:31,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100696969] [2022-11-20 09:32:31,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100696969] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:32:31,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600595304] [2022-11-20 09:32:31,599 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 09:32:31,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:32:31,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:32:31,602 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:32:31,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-20 09:32:31,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:32:31,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 69 conjunts are in the unsatisfiable core [2022-11-20 09:32:31,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:32:31,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 09:32:32,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:32:32,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 09:32:32,560 INFO L134 CoverageAnalysis]: Checked inductivity of 575 backedges. 0 proven. 575 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:32,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:32:33,413 INFO L350 Elim1Store]: Elim1 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 23 treesize of output 21 [2022-11-20 09:32:33,417 INFO L350 Elim1Store]: Elim1 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 54 treesize of output 50 [2022-11-20 09:32:33,958 INFO L134 CoverageAnalysis]: Checked inductivity of 575 backedges. 0 proven. 575 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:33,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600595304] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:32:33,959 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:32:33,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 32] total 63 [2022-11-20 09:32:33,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195011618] [2022-11-20 09:32:33,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:32:33,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-11-20 09:32:33,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:32:33,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-11-20 09:32:33,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=3666, Unknown=0, NotChecked=0, Total=3906 [2022-11-20 09:32:33,961 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand has 63 states, 63 states have (on average 3.142857142857143) internal successors, (198), 63 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:36,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:32:36,430 INFO L93 Difference]: Finished difference Result 108 states and 109 transitions. [2022-11-20 09:32:36,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-11-20 09:32:36,431 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 3.142857142857143) internal successors, (198), 63 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2022-11-20 09:32:36,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:32:36,431 INFO L225 Difference]: With dead ends: 108 [2022-11-20 09:32:36,431 INFO L226 Difference]: Without dead ends: 106 [2022-11-20 09:32:36,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 161 SyntacticMatches, 5 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1978 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=498, Invalid=7874, Unknown=0, NotChecked=0, Total=8372 [2022-11-20 09:32:36,433 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 135 mSDsluCounter, 1143 mSDsCounter, 0 mSdLazyCounter, 2951 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 1176 SdHoareTripleChecker+Invalid, 3059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 2951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-20 09:32:36,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 1176 Invalid, 3059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 2951 Invalid, 0 Unknown, 30 Unchecked, 1.4s Time] [2022-11-20 09:32:36,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-11-20 09:32:36,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 103. [2022-11-20 09:32:36,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.0196078431372548) internal successors, (104), 102 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:36,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2022-11-20 09:32:36,464 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 98 [2022-11-20 09:32:36,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:32:36,465 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2022-11-20 09:32:36,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 3.142857142857143) internal successors, (198), 63 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:36,465 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2022-11-20 09:32:36,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-20 09:32:36,466 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:32:36,466 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:32:36,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-20 09:32:36,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-11-20 09:32:36,672 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:32:36,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:32:36,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1569305295, now seen corresponding path program 26 times [2022-11-20 09:32:36,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:32:36,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404896134] [2022-11-20 09:32:36,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:32:36,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:32:36,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:32:37,843 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:37,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:32:37,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404896134] [2022-11-20 09:32:37,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404896134] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:32:37,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506619722] [2022-11-20 09:32:37,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:32:37,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:32:37,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:32:37,846 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:32:37,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-20 09:32:38,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:32:38,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:32:38,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 70 conjunts are in the unsatisfiable core [2022-11-20 09:32:38,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:32:38,661 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2022-11-20 09:32:39,739 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:39,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:32:39,891 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 14 [2022-11-20 09:32:39,892 INFO L350 Elim1Store]: Elim1 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 20 treesize of output 16 [2022-11-20 09:32:40,058 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:40,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506619722] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:32:40,058 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:32:40,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 64 [2022-11-20 09:32:40,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656797973] [2022-11-20 09:32:40,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:32:40,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-11-20 09:32:40,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:32:40,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-11-20 09:32:40,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=3813, Unknown=0, NotChecked=0, Total=4032 [2022-11-20 09:32:40,060 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand has 64 states, 64 states have (on average 3.25) internal successors, (208), 64 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:42,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:32:42,164 INFO L93 Difference]: Finished difference Result 114 states and 115 transitions. [2022-11-20 09:32:42,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-20 09:32:42,164 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 3.25) internal successors, (208), 64 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2022-11-20 09:32:42,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:32:42,165 INFO L225 Difference]: With dead ends: 114 [2022-11-20 09:32:42,165 INFO L226 Difference]: Without dead ends: 112 [2022-11-20 09:32:42,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 171 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2013 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=460, Invalid=8470, Unknown=0, NotChecked=0, Total=8930 [2022-11-20 09:32:42,166 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 218 mSDsluCounter, 1132 mSDsCounter, 0 mSdLazyCounter, 3107 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 1167 SdHoareTripleChecker+Invalid, 3159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 3107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-20 09:32:42,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 1167 Invalid, 3159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 3107 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-20 09:32:42,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-11-20 09:32:42,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 107. [2022-11-20 09:32:42,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.0188679245283019) internal successors, (108), 106 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:42,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2022-11-20 09:32:42,198 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 102 [2022-11-20 09:32:42,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:32:42,199 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2022-11-20 09:32:42,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 3.25) internal successors, (208), 64 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:42,199 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2022-11-20 09:32:42,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-20 09:32:42,200 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:32:42,200 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:32:42,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-20 09:32:42,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-11-20 09:32:42,406 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:32:42,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:32:42,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1071810009, now seen corresponding path program 27 times [2022-11-20 09:32:42,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:32:42,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807768898] [2022-11-20 09:32:42,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:32:42,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:32:42,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:32:43,152 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 339 proven. 340 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:43,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:32:43,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807768898] [2022-11-20 09:32:43,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807768898] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:32:43,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097011444] [2022-11-20 09:32:43,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:32:43,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:32:43,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:32:43,154 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:32:43,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-20 09:32:44,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-11-20 09:32:44,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:32:44,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 09:32:44,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:32:44,871 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 392 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:44,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:32:45,363 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 392 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:45,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097011444] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:32:45,364 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:32:45,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 50 [2022-11-20 09:32:45,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88907301] [2022-11-20 09:32:45,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:32:45,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-20 09:32:45,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:32:45,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-20 09:32:45,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=581, Invalid=1869, Unknown=0, NotChecked=0, Total=2450 [2022-11-20 09:32:45,366 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand has 50 states, 50 states have (on average 3.46) internal successors, (173), 50 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:45,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:32:45,824 INFO L93 Difference]: Finished difference Result 184 states and 186 transitions. [2022-11-20 09:32:45,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-20 09:32:45,825 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.46) internal successors, (173), 50 states have internal predecessors, (173), 0 states have call successors, (0), 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 106 [2022-11-20 09:32:45,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:32:45,826 INFO L225 Difference]: With dead ends: 184 [2022-11-20 09:32:45,826 INFO L226 Difference]: Without dead ends: 120 [2022-11-20 09:32:45,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 165 SyntacticMatches, 30 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1935 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=986, Invalid=3174, Unknown=0, NotChecked=0, Total=4160 [2022-11-20 09:32:45,827 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 267 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 09:32:45,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 242 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 09:32:45,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-11-20 09:32:45,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 110. [2022-11-20 09:32:45,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.018348623853211) internal successors, (111), 109 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:45,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 111 transitions. [2022-11-20 09:32:45,851 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 111 transitions. Word has length 106 [2022-11-20 09:32:45,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:32:45,851 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 111 transitions. [2022-11-20 09:32:45,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.46) internal successors, (173), 50 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:45,851 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 111 transitions. [2022-11-20 09:32:45,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-20 09:32:45,852 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:32:45,852 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:32:45,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-20 09:32:46,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-20 09:32:46,060 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:32:46,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:32:46,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1078465220, now seen corresponding path program 28 times [2022-11-20 09:32:46,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:32:46,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901909348] [2022-11-20 09:32:46,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:32:46,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:32:46,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:32:47,385 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:47,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:32:47,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901909348] [2022-11-20 09:32:47,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901909348] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:32:47,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864472671] [2022-11-20 09:32:47,386 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 09:32:47,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:32:47,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:32:47,387 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:32:47,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-20 09:32:47,552 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 09:32:47,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:32:47,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 77 conjunts are in the unsatisfiable core [2022-11-20 09:32:47,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:32:47,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 09:32:48,578 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:48,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:32:48,798 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 14 [2022-11-20 09:32:48,800 INFO L350 Elim1Store]: Elim1 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 20 treesize of output 16 [2022-11-20 09:32:48,953 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:48,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864472671] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:32:48,954 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:32:48,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 52 [2022-11-20 09:32:48,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370492694] [2022-11-20 09:32:48,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:32:48,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-20 09:32:48,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:32:48,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-20 09:32:48,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=2498, Unknown=0, NotChecked=0, Total=2652 [2022-11-20 09:32:48,956 INFO L87 Difference]: Start difference. First operand 110 states and 111 transitions. Second operand has 52 states, 52 states have (on average 3.326923076923077) internal successors, (173), 52 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:51,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:32:51,391 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2022-11-20 09:32:51,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-11-20 09:32:51,391 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.326923076923077) internal successors, (173), 52 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2022-11-20 09:32:51,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:32:51,392 INFO L225 Difference]: With dead ends: 121 [2022-11-20 09:32:51,392 INFO L226 Difference]: Without dead ends: 119 [2022-11-20 09:32:51,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 196 SyntacticMatches, 5 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1494 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=391, Invalid=7265, Unknown=0, NotChecked=0, Total=7656 [2022-11-20 09:32:51,393 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 146 mSDsluCounter, 1069 mSDsCounter, 0 mSdLazyCounter, 3242 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 1105 SdHoareTripleChecker+Invalid, 3291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 3242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:32:51,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 1105 Invalid, 3291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 3242 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-20 09:32:51,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-11-20 09:32:51,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 114. [2022-11-20 09:32:51,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.0176991150442478) internal successors, (115), 113 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:51,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2022-11-20 09:32:51,429 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 109 [2022-11-20 09:32:51,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:32:51,430 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2022-11-20 09:32:51,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.326923076923077) internal successors, (173), 52 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:51,430 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2022-11-20 09:32:51,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-20 09:32:51,431 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:32:51,431 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:32:51,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-20 09:32:51,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-20 09:32:51,637 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:32:51,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:32:51,637 INFO L85 PathProgramCache]: Analyzing trace with hash 606739634, now seen corresponding path program 29 times [2022-11-20 09:32:51,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:32:51,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564608626] [2022-11-20 09:32:51,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:32:51,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:32:51,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:32:52,459 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 393 proven. 387 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:52,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:32:52,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564608626] [2022-11-20 09:32:52,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564608626] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:32:52,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126246432] [2022-11-20 09:32:52,460 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 09:32:52,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:32:52,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:32:52,461 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:32:52,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-20 09:32:52,831 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2022-11-20 09:32:52,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:32:52,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-20 09:32:52,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:32:53,527 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 450 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:53,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:32:54,072 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 450 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:54,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126246432] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:32:54,072 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:32:54,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 53 [2022-11-20 09:32:54,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378575448] [2022-11-20 09:32:54,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:32:54,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-20 09:32:54,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:32:54,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-20 09:32:54,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=651, Invalid=2105, Unknown=0, NotChecked=0, Total=2756 [2022-11-20 09:32:54,074 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand has 53 states, 53 states have (on average 3.4716981132075473) internal successors, (184), 53 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:54,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:32:54,560 INFO L93 Difference]: Finished difference Result 195 states and 197 transitions. [2022-11-20 09:32:54,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-20 09:32:54,563 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.4716981132075473) internal successors, (184), 53 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2022-11-20 09:32:54,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:32:54,564 INFO L225 Difference]: With dead ends: 195 [2022-11-20 09:32:54,564 INFO L226 Difference]: Without dead ends: 127 [2022-11-20 09:32:54,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 176 SyntacticMatches, 32 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2185 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1107, Invalid=3585, Unknown=0, NotChecked=0, Total=4692 [2022-11-20 09:32:54,566 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 252 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 09:32:54,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 278 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 09:32:54,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-11-20 09:32:54,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 117. [2022-11-20 09:32:54,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.0172413793103448) internal successors, (118), 116 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:54,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2022-11-20 09:32:54,589 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 113 [2022-11-20 09:32:54,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:32:54,590 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2022-11-20 09:32:54,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.4716981132075473) internal successors, (184), 53 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:54,590 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2022-11-20 09:32:54,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-20 09:32:54,591 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:32:54,591 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:32:54,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-20 09:32:54,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:32:54,798 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:32:54,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:32:54,798 INFO L85 PathProgramCache]: Analyzing trace with hash -269420547, now seen corresponding path program 30 times [2022-11-20 09:32:54,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:32:54,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344161836] [2022-11-20 09:32:54,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:32:54,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:32:54,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:32:56,153 INFO L134 CoverageAnalysis]: Checked inductivity of 826 backedges. 0 proven. 826 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:56,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:32:56,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344161836] [2022-11-20 09:32:56,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344161836] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:32:56,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278974530] [2022-11-20 09:32:56,154 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 09:32:56,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:32:56,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:32:56,155 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:32:56,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-20 09:32:57,612 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2022-11-20 09:32:57,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:32:57,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-20 09:32:57,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:32:58,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 09:33:00,362 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-20 09:33:00,363 INFO L350 Elim1Store]: Elim1 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 44 treesize of output 23 [2022-11-20 09:33:00,416 INFO L134 CoverageAnalysis]: Checked inductivity of 826 backedges. 435 proven. 391 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:33:00,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:33:03,452 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 16 [2022-11-20 09:33:03,455 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 20 [2022-11-20 09:33:04,104 INFO L134 CoverageAnalysis]: Checked inductivity of 826 backedges. 420 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:33:04,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278974530] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:33:04,105 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:33:04,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 38, 38] total 92 [2022-11-20 09:33:04,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135323294] [2022-11-20 09:33:04,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:33:04,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-11-20 09:33:04,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:33:04,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-11-20 09:33:04,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=933, Invalid=7438, Unknown=1, NotChecked=0, Total=8372 [2022-11-20 09:33:04,108 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand has 92 states, 92 states have (on average 3.1956521739130435) internal successors, (294), 92 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:08,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:33:08,350 INFO L93 Difference]: Finished difference Result 188 states and 190 transitions. [2022-11-20 09:33:08,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-11-20 09:33:08,350 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 3.1956521739130435) internal successors, (294), 92 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2022-11-20 09:33:08,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:33:08,351 INFO L225 Difference]: With dead ends: 188 [2022-11-20 09:33:08,351 INFO L226 Difference]: Without dead ends: 120 [2022-11-20 09:33:08,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 178 SyntacticMatches, 16 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5007 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=2264, Invalid=22227, Unknown=1, NotChecked=0, Total=24492 [2022-11-20 09:33:08,354 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 82 mSDsluCounter, 892 mSDsCounter, 0 mSdLazyCounter, 1048 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 931 SdHoareTripleChecker+Invalid, 1318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 259 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:33:08,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 931 Invalid, 1318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1048 Invalid, 0 Unknown, 259 Unchecked, 0.5s Time] [2022-11-20 09:33:08,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-11-20 09:33:08,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2022-11-20 09:33:08,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.0168067226890756) internal successors, (121), 119 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:08,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 121 transitions. [2022-11-20 09:33:08,393 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 121 transitions. Word has length 116 [2022-11-20 09:33:08,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:33:08,394 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 121 transitions. [2022-11-20 09:33:08,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 3.1956521739130435) internal successors, (294), 92 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:08,394 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 121 transitions. [2022-11-20 09:33:08,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-11-20 09:33:08,395 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:33:08,395 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:33:08,407 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-11-20 09:33:08,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:33:08,602 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:33:08,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:33:08,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1441114926, now seen corresponding path program 31 times [2022-11-20 09:33:08,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:33:08,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584577763] [2022-11-20 09:33:08,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:33:08,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:33:08,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:33:10,051 INFO L134 CoverageAnalysis]: Checked inductivity of 875 backedges. 0 proven. 875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:33:10,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:33:10,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584577763] [2022-11-20 09:33:10,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584577763] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:33:10,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664938519] [2022-11-20 09:33:10,052 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 09:33:10,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:33:10,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:33:10,053 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:33:10,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-20 09:33:10,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:33:10,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-20 09:33:10,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:33:10,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 09:33:11,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:33:11,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-20 09:33:12,453 INFO L134 CoverageAnalysis]: Checked inductivity of 875 backedges. 0 proven. 875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:33:12,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:33:12,724 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 14 [2022-11-20 09:33:12,726 INFO L350 Elim1Store]: Elim1 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 20 treesize of output 16 [2022-11-20 09:33:12,861 INFO L134 CoverageAnalysis]: Checked inductivity of 875 backedges. 0 proven. 875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:33:12,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664938519] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:33:12,861 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:33:12,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 38] total 75 [2022-11-20 09:33:12,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019615003] [2022-11-20 09:33:12,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:33:12,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-11-20 09:33:12,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:33:12,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-11-20 09:33:12,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=5273, Unknown=0, NotChecked=0, Total=5550 [2022-11-20 09:33:12,864 INFO L87 Difference]: Start difference. First operand 120 states and 121 transitions. Second operand has 75 states, 75 states have (on average 3.2266666666666666) internal successors, (242), 75 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:15,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:33:15,617 INFO L93 Difference]: Finished difference Result 129 states and 130 transitions. [2022-11-20 09:33:15,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-11-20 09:33:15,618 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 3.2266666666666666) internal successors, (242), 75 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2022-11-20 09:33:15,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:33:15,619 INFO L225 Difference]: With dead ends: 129 [2022-11-20 09:33:15,619 INFO L226 Difference]: Without dead ends: 127 [2022-11-20 09:33:15,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 197 SyntacticMatches, 4 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2777 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=553, Invalid=11437, Unknown=0, NotChecked=0, Total=11990 [2022-11-20 09:33:15,620 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 296 mSDsluCounter, 1501 mSDsCounter, 0 mSdLazyCounter, 3946 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 1540 SdHoareTripleChecker+Invalid, 4025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 3946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-20 09:33:15,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 1540 Invalid, 4025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 3946 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-20 09:33:15,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-11-20 09:33:15,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 124. [2022-11-20 09:33:15,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.016260162601626) internal successors, (125), 123 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:15,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 125 transitions. [2022-11-20 09:33:15,660 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 125 transitions. Word has length 119 [2022-11-20 09:33:15,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:33:15,661 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 125 transitions. [2022-11-20 09:33:15,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 3.2266666666666666) internal successors, (242), 75 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:15,661 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 125 transitions. [2022-11-20 09:33:15,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-20 09:33:15,662 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:33:15,662 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:33:15,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-11-20 09:33:15,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-20 09:33:15,869 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:33:15,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:33:15,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1052587704, now seen corresponding path program 32 times [2022-11-20 09:33:15,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:33:15,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805950704] [2022-11-20 09:33:15,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:33:15,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:33:15,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:33:17,499 INFO L134 CoverageAnalysis]: Checked inductivity of 937 backedges. 0 proven. 937 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:33:17,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:33:17,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805950704] [2022-11-20 09:33:17,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805950704] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:33:17,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580811314] [2022-11-20 09:33:17,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:33:17,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:33:17,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:33:17,501 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:33:17,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-20 09:33:17,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:33:17,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:33:17,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 82 conjunts are in the unsatisfiable core [2022-11-20 09:33:17,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:33:18,622 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2022-11-20 09:33:20,115 INFO L134 CoverageAnalysis]: Checked inductivity of 937 backedges. 0 proven. 937 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:33:20,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:33:20,287 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 14 [2022-11-20 09:33:20,289 INFO L350 Elim1Store]: Elim1 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 20 treesize of output 16 [2022-11-20 09:33:20,437 INFO L134 CoverageAnalysis]: Checked inductivity of 937 backedges. 0 proven. 937 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:33:20,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580811314] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:33:20,438 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:33:20,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 76 [2022-11-20 09:33:20,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079587774] [2022-11-20 09:33:20,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:33:20,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-11-20 09:33:20,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:33:20,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-11-20 09:33:20,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=5439, Unknown=0, NotChecked=0, Total=5700 [2022-11-20 09:33:20,440 INFO L87 Difference]: Start difference. First operand 124 states and 125 transitions. Second operand has 76 states, 76 states have (on average 3.289473684210526) internal successors, (250), 76 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:23,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:33:23,529 INFO L93 Difference]: Finished difference Result 135 states and 136 transitions. [2022-11-20 09:33:23,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-11-20 09:33:23,529 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 3.289473684210526) internal successors, (250), 76 states have internal predecessors, (250), 0 states have call successors, (0), 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 123 [2022-11-20 09:33:23,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:33:23,530 INFO L225 Difference]: With dead ends: 135 [2022-11-20 09:33:23,530 INFO L226 Difference]: Without dead ends: 133 [2022-11-20 09:33:23,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 207 SyntacticMatches, 2 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2847 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=547, Invalid=12109, Unknown=0, NotChecked=0, Total=12656 [2022-11-20 09:33:23,531 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 195 mSDsluCounter, 1735 mSDsCounter, 0 mSdLazyCounter, 4871 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 1776 SdHoareTripleChecker+Invalid, 4935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 4871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-20 09:33:23,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 1776 Invalid, 4935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 4871 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-20 09:33:23,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-11-20 09:33:23,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 128. [2022-11-20 09:33:23,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.015748031496063) internal successors, (129), 127 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:23,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 129 transitions. [2022-11-20 09:33:23,562 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 129 transitions. Word has length 123 [2022-11-20 09:33:23,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:33:23,563 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 129 transitions. [2022-11-20 09:33:23,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 3.289473684210526) internal successors, (250), 76 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:23,563 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 129 transitions. [2022-11-20 09:33:23,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-20 09:33:23,564 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:33:23,564 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:33:23,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-20 09:33:23,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-20 09:33:23,770 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:33:23,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:33:23,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1838158526, now seen corresponding path program 33 times [2022-11-20 09:33:23,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:33:23,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571921959] [2022-11-20 09:33:23,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:33:23,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:33:23,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:33:24,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1003 backedges. 513 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:33:24,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:33:24,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571921959] [2022-11-20 09:33:24,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571921959] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:33:24,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979668221] [2022-11-20 09:33:24,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:33:24,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:33:24,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:33:24,582 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:33:24,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-20 09:33:25,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2022-11-20 09:33:25,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:33:25,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-20 09:33:25,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:33:26,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1003 backedges. 578 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:33:26,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:33:27,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1003 backedges. 578 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:33:27,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979668221] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:33:27,274 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:33:27,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 59 [2022-11-20 09:33:27,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228108605] [2022-11-20 09:33:27,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:33:27,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-11-20 09:33:27,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:33:27,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-11-20 09:33:27,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=803, Invalid=2619, Unknown=0, NotChecked=0, Total=3422 [2022-11-20 09:33:27,276 INFO L87 Difference]: Start difference. First operand 128 states and 129 transitions. Second operand has 59 states, 59 states have (on average 3.4915254237288136) internal successors, (206), 59 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:27,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:33:27,834 INFO L93 Difference]: Finished difference Result 217 states and 219 transitions. [2022-11-20 09:33:27,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-20 09:33:27,834 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.4915254237288136) internal successors, (206), 59 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2022-11-20 09:33:27,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:33:27,835 INFO L225 Difference]: With dead ends: 217 [2022-11-20 09:33:27,835 INFO L226 Difference]: Without dead ends: 141 [2022-11-20 09:33:27,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 198 SyntacticMatches, 36 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2730 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1370, Invalid=4482, Unknown=0, NotChecked=0, Total=5852 [2022-11-20 09:33:27,836 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 484 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 09:33:27,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [484 Valid, 294 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 09:33:27,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-11-20 09:33:27,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 131. [2022-11-20 09:33:27,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.0153846153846153) internal successors, (132), 130 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:27,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2022-11-20 09:33:27,869 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 127 [2022-11-20 09:33:27,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:33:27,870 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2022-11-20 09:33:27,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.4915254237288136) internal successors, (206), 59 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:27,870 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2022-11-20 09:33:27,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-20 09:33:27,871 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:33:27,871 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:33:27,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-11-20 09:33:28,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-20 09:33:28,078 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:33:28,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:33:28,078 INFO L85 PathProgramCache]: Analyzing trace with hash 772001481, now seen corresponding path program 34 times [2022-11-20 09:33:28,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:33:28,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695707324] [2022-11-20 09:33:28,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:33:28,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:33:28,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:33:29,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1055 backedges. 0 proven. 1055 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:33:29,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:33:29,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695707324] [2022-11-20 09:33:29,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695707324] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:33:29,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242796723] [2022-11-20 09:33:29,789 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 09:33:29,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:33:29,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:33:29,790 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:33:29,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-20 09:33:29,976 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 09:33:29,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:33:29,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 89 conjunts are in the unsatisfiable core [2022-11-20 09:33:29,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:33:30,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 09:33:31,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1055 backedges. 0 proven. 1055 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:33:31,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:33:31,536 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 14 [2022-11-20 09:33:31,538 INFO L350 Elim1Store]: Elim1 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 20 treesize of output 16 [2022-11-20 09:33:31,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1055 backedges. 0 proven. 1055 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:33:31,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242796723] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:33:31,691 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:33:31,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 61 [2022-11-20 09:33:31,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301358771] [2022-11-20 09:33:31,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:33:31,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-11-20 09:33:31,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:33:31,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-11-20 09:33:31,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=3479, Unknown=0, NotChecked=0, Total=3660 [2022-11-20 09:33:31,693 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand has 61 states, 61 states have (on average 3.377049180327869) internal successors, (206), 61 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:35,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:33:35,011 INFO L93 Difference]: Finished difference Result 142 states and 143 transitions. [2022-11-20 09:33:35,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-11-20 09:33:35,011 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 3.377049180327869) internal successors, (206), 61 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2022-11-20 09:33:35,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:33:35,012 INFO L225 Difference]: With dead ends: 142 [2022-11-20 09:33:35,012 INFO L226 Difference]: Without dead ends: 140 [2022-11-20 09:33:35,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 235 SyntacticMatches, 5 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2028 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=454, Invalid=10052, Unknown=0, NotChecked=0, Total=10506 [2022-11-20 09:33:35,016 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 178 mSDsluCounter, 1498 mSDsCounter, 0 mSdLazyCounter, 4452 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 1540 SdHoareTripleChecker+Invalid, 4510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 4452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-20 09:33:35,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 1540 Invalid, 4510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 4452 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-20 09:33:35,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-11-20 09:33:35,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 135. [2022-11-20 09:33:35,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.0149253731343284) internal successors, (136), 134 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:35,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2022-11-20 09:33:35,063 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 130 [2022-11-20 09:33:35,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:33:35,063 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2022-11-20 09:33:35,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 3.377049180327869) internal successors, (206), 61 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:35,063 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2022-11-20 09:33:35,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-20 09:33:35,064 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:33:35,064 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:33:35,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-11-20 09:33:35,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-11-20 09:33:35,267 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:33:35,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:33:35,268 INFO L85 PathProgramCache]: Analyzing trace with hash -547328065, now seen corresponding path program 35 times [2022-11-20 09:33:35,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:33:35,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241971397] [2022-11-20 09:33:35,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:33:35,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:33:35,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:33:36,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1125 backedges. 579 proven. 546 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:33:36,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:33:36,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241971397] [2022-11-20 09:33:36,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241971397] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:33:36,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28500235] [2022-11-20 09:33:36,250 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 09:33:36,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:33:36,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:33:36,251 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:33:36,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-20 09:33:36,727 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2022-11-20 09:33:36,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:33:36,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-20 09:33:36,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:33:37,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1125 backedges. 648 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:33:37,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:33:38,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1125 backedges. 648 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:33:38,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28500235] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:33:38,389 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:33:38,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 62 [2022-11-20 09:33:38,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579913340] [2022-11-20 09:33:38,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:33:38,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-11-20 09:33:38,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:33:38,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-11-20 09:33:38,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=885, Invalid=2897, Unknown=0, NotChecked=0, Total=3782 [2022-11-20 09:33:38,391 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand has 62 states, 62 states have (on average 3.5) internal successors, (217), 62 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:39,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:33:39,013 INFO L93 Difference]: Finished difference Result 228 states and 230 transitions. [2022-11-20 09:33:39,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-20 09:33:39,014 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 3.5) internal successors, (217), 62 states have internal predecessors, (217), 0 states have call successors, (0), 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 134 [2022-11-20 09:33:39,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:33:39,015 INFO L225 Difference]: With dead ends: 228 [2022-11-20 09:33:39,015 INFO L226 Difference]: Without dead ends: 148 [2022-11-20 09:33:39,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 209 SyntacticMatches, 38 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3025 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1512, Invalid=4968, Unknown=0, NotChecked=0, Total=6480 [2022-11-20 09:33:39,016 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 291 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 09:33:39,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [291 Valid, 389 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 09:33:39,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-11-20 09:33:39,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 138. [2022-11-20 09:33:39,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.0145985401459854) internal successors, (139), 137 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) [2022-11-20 09:33:39,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 139 transitions. [2022-11-20 09:33:39,047 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 139 transitions. Word has length 134 [2022-11-20 09:33:39,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:33:39,048 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 139 transitions. [2022-11-20 09:33:39,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 3.5) internal successors, (217), 62 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:39,048 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 139 transitions. [2022-11-20 09:33:39,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-20 09:33:39,049 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:33:39,049 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:33:39,059 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-11-20 09:33:39,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:33:39,257 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:33:39,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:33:39,257 INFO L85 PathProgramCache]: Analyzing trace with hash 456008020, now seen corresponding path program 36 times [2022-11-20 09:33:39,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:33:39,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245623671] [2022-11-20 09:33:39,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:33:39,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:33:39,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:33:41,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 0 proven. 1180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:33:41,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:33:41,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245623671] [2022-11-20 09:33:41,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245623671] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:33:41,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877734254] [2022-11-20 09:33:41,009 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 09:33:41,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:33:41,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:33:41,012 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:33:41,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-20 09:33:44,921 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2022-11-20 09:33:44,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:33:44,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-20 09:33:44,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:33:45,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 09:33:48,961 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-20 09:33:48,961 INFO L350 Elim1Store]: Elim1 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 44 treesize of output 23 [2022-11-20 09:33:49,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 630 proven. 550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:33:49,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:33:52,396 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 16 [2022-11-20 09:33:52,399 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 20 [2022-11-20 09:33:53,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 612 proven. 568 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:33:53,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877734254] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:33:53,283 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:33:53,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 44, 44] total 107 [2022-11-20 09:33:53,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432972181] [2022-11-20 09:33:53,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:33:53,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-11-20 09:33:53,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:33:53,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-11-20 09:33:53,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1242, Invalid=10100, Unknown=0, NotChecked=0, Total=11342 [2022-11-20 09:33:53,286 INFO L87 Difference]: Start difference. First operand 138 states and 139 transitions. Second operand has 107 states, 107 states have (on average 3.2523364485981308) internal successors, (348), 107 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:59,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:33:59,070 INFO L93 Difference]: Finished difference Result 221 states and 223 transitions. [2022-11-20 09:33:59,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-11-20 09:33:59,071 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 3.2523364485981308) internal successors, (348), 107 states have internal predecessors, (348), 0 states have call successors, (0), 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 137 [2022-11-20 09:33:59,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:33:59,072 INFO L225 Difference]: With dead ends: 221 [2022-11-20 09:33:59,072 INFO L226 Difference]: Without dead ends: 141 [2022-11-20 09:33:59,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 211 SyntacticMatches, 19 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6822 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=2993, Invalid=30679, Unknown=0, NotChecked=0, Total=33672 [2022-11-20 09:33:59,075 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 82 mSDsluCounter, 1066 mSDsCounter, 0 mSdLazyCounter, 1390 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 1110 SdHoareTripleChecker+Invalid, 1992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 554 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 09:33:59,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 1110 Invalid, 1992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1390 Invalid, 0 Unknown, 554 Unchecked, 0.7s Time] [2022-11-20 09:33:59,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-11-20 09:33:59,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2022-11-20 09:33:59,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.0142857142857142) internal successors, (142), 140 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:59,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2022-11-20 09:33:59,127 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 137 [2022-11-20 09:33:59,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:33:59,127 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2022-11-20 09:33:59,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 3.2523364485981308) internal successors, (348), 107 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:59,128 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2022-11-20 09:33:59,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-20 09:33:59,129 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:33:59,129 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:33:59,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-11-20 09:33:59,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:33:59,342 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:33:59,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:33:59,343 INFO L85 PathProgramCache]: Analyzing trace with hash -2131063905, now seen corresponding path program 37 times [2022-11-20 09:33:59,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:33:59,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806830624] [2022-11-20 09:33:59,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:33:59,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:33:59,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:34:01,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1238 backedges. 0 proven. 1238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:34:01,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:34:01,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806830624] [2022-11-20 09:34:01,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806830624] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:34:01,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255225641] [2022-11-20 09:34:01,248 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 09:34:01,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:34:01,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:34:01,249 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:34:01,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-11-20 09:34:01,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:34:01,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 93 conjunts are in the unsatisfiable core [2022-11-20 09:34:01,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:34:02,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 09:34:02,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:34:02,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-20 09:34:04,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1238 backedges. 0 proven. 1238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:34:04,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:34:04,815 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 14 [2022-11-20 09:34:04,817 INFO L350 Elim1Store]: Elim1 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 20 treesize of output 16 [2022-11-20 09:34:04,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1238 backedges. 0 proven. 1238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:34:04,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255225641] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:34:04,998 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:34:04,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 44] total 87 [2022-11-20 09:34:04,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435011218] [2022-11-20 09:34:04,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:34:04,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-11-20 09:34:04,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:34:05,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-11-20 09:34:05,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=7160, Unknown=0, NotChecked=0, Total=7482 [2022-11-20 09:34:05,000 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand has 87 states, 87 states have (on average 3.264367816091954) internal successors, (284), 87 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:08,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:34:08,801 INFO L93 Difference]: Finished difference Result 150 states and 151 transitions. [2022-11-20 09:34:08,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-11-20 09:34:08,802 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 3.264367816091954) internal successors, (284), 87 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2022-11-20 09:34:08,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:34:08,803 INFO L225 Difference]: With dead ends: 150 [2022-11-20 09:34:08,803 INFO L226 Difference]: Without dead ends: 148 [2022-11-20 09:34:08,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 233 SyntacticMatches, 4 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3743 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=643, Invalid=15613, Unknown=0, NotChecked=0, Total=16256 [2022-11-20 09:34:08,804 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 353 mSDsluCounter, 2365 mSDsCounter, 0 mSdLazyCounter, 6049 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 2410 SdHoareTripleChecker+Invalid, 6143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 6049 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:34:08,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [353 Valid, 2410 Invalid, 6143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 6049 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-20 09:34:08,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-11-20 09:34:08,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 145. [2022-11-20 09:34:08,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.0138888888888888) internal successors, (146), 144 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:08,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2022-11-20 09:34:08,858 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 140 [2022-11-20 09:34:08,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:34:08,858 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2022-11-20 09:34:08,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 3.264367816091954) internal successors, (284), 87 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:08,859 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2022-11-20 09:34:08,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-20 09:34:08,860 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:34:08,860 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:34:08,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-11-20 09:34:09,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:34:09,066 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:34:09,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:34:09,067 INFO L85 PathProgramCache]: Analyzing trace with hash 744542613, now seen corresponding path program 38 times [2022-11-20 09:34:09,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:34:09,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530906931] [2022-11-20 09:34:09,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:34:09,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:34:09,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:34:10,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1312 backedges. 0 proven. 1312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:34:10,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:34:10,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530906931] [2022-11-20 09:34:10,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530906931] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:34:10,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929835117] [2022-11-20 09:34:10,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:34:10,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:34:10,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:34:10,896 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:34:10,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-20 09:34:11,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:34:11,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:34:11,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 94 conjunts are in the unsatisfiable core [2022-11-20 09:34:11,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:34:12,242 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2022-11-20 09:34:14,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1312 backedges. 0 proven. 1312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:34:14,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:34:14,351 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 14 [2022-11-20 09:34:14,353 INFO L350 Elim1Store]: Elim1 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 20 treesize of output 16 [2022-11-20 09:34:14,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1312 backedges. 0 proven. 1312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:34:14,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929835117] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:34:14,536 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:34:14,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 88 [2022-11-20 09:34:14,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280671967] [2022-11-20 09:34:14,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:34:14,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-11-20 09:34:14,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:34:14,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-11-20 09:34:14,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=7353, Unknown=0, NotChecked=0, Total=7656 [2022-11-20 09:34:14,537 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand has 88 states, 88 states have (on average 3.3181818181818183) internal successors, (292), 88 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:18,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:34:18,426 INFO L93 Difference]: Finished difference Result 156 states and 157 transitions. [2022-11-20 09:34:18,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-11-20 09:34:18,427 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 3.3181818181818183) internal successors, (292), 88 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2022-11-20 09:34:18,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:34:18,427 INFO L225 Difference]: With dead ends: 156 [2022-11-20 09:34:18,427 INFO L226 Difference]: Without dead ends: 154 [2022-11-20 09:34:18,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 243 SyntacticMatches, 2 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3825 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=634, Invalid=16396, Unknown=0, NotChecked=0, Total=17030 [2022-11-20 09:34:18,428 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 224 mSDsluCounter, 2206 mSDsCounter, 0 mSdLazyCounter, 6080 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 2253 SdHoareTripleChecker+Invalid, 6151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 6080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:34:18,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 2253 Invalid, 6151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 6080 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-20 09:34:18,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-11-20 09:34:18,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 149. [2022-11-20 09:34:18,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.0135135135135136) internal successors, (150), 148 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:18,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2022-11-20 09:34:18,467 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 144 [2022-11-20 09:34:18,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:34:18,467 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2022-11-20 09:34:18,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 3.3181818181818183) internal successors, (292), 88 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:18,468 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2022-11-20 09:34:18,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-11-20 09:34:18,468 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:34:18,468 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:34:18,473 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-11-20 09:34:18,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:34:18,669 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:34:18,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:34:18,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1901646709, now seen corresponding path program 39 times [2022-11-20 09:34:18,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:34:18,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256440028] [2022-11-20 09:34:18,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:34:18,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:34:18,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:34:19,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1390 backedges. 723 proven. 667 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:34:19,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:34:19,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256440028] [2022-11-20 09:34:19,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256440028] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:34:19,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375669176] [2022-11-20 09:34:19,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:34:19,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:34:19,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:34:19,787 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:34:19,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-11-20 09:34:21,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2022-11-20 09:34:21,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:34:21,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-20 09:34:21,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:34:22,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1390 backedges. 800 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:34:22,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:34:23,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1390 backedges. 800 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:34:23,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375669176] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:34:23,733 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:34:23,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 68 [2022-11-20 09:34:23,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88139281] [2022-11-20 09:34:23,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:34:23,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-11-20 09:34:23,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:34:23,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-11-20 09:34:23,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1061, Invalid=3495, Unknown=0, NotChecked=0, Total=4556 [2022-11-20 09:34:23,735 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand has 68 states, 68 states have (on average 3.514705882352941) internal successors, (239), 68 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:24,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:34:24,482 INFO L93 Difference]: Finished difference Result 250 states and 252 transitions. [2022-11-20 09:34:24,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-20 09:34:24,482 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 3.514705882352941) internal successors, (239), 68 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 148 [2022-11-20 09:34:24,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:34:24,483 INFO L225 Difference]: With dead ends: 250 [2022-11-20 09:34:24,483 INFO L226 Difference]: Without dead ends: 162 [2022-11-20 09:34:24,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 231 SyntacticMatches, 42 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3660 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1817, Invalid=6015, Unknown=0, NotChecked=0, Total=7832 [2022-11-20 09:34:24,484 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 489 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 09:34:24,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [489 Valid, 431 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 09:34:24,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-11-20 09:34:24,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 152. [2022-11-20 09:34:24,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.0132450331125828) internal successors, (153), 151 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:24,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 153 transitions. [2022-11-20 09:34:24,529 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 153 transitions. Word has length 148 [2022-11-20 09:34:24,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:34:24,529 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 153 transitions. [2022-11-20 09:34:24,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 3.514705882352941) internal successors, (239), 68 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:24,529 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 153 transitions. [2022-11-20 09:34:24,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-11-20 09:34:24,530 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:34:24,530 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 21, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:34:24,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-11-20 09:34:24,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:34:24,738 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:34:24,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:34:24,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1595935392, now seen corresponding path program 40 times [2022-11-20 09:34:24,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:34:24,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572480327] [2022-11-20 09:34:24,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:34:24,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:34:24,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:34:26,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1451 backedges. 0 proven. 1451 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:34:26,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:34:26,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572480327] [2022-11-20 09:34:26,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572480327] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:34:26,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146917895] [2022-11-20 09:34:26,923 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 09:34:26,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:34:26,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:34:26,928 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:34:26,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-11-20 09:34:27,201 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 09:34:27,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:34:27,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 101 conjunts are in the unsatisfiable core [2022-11-20 09:34:27,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:34:27,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 09:34:28,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1451 backedges. 0 proven. 1451 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:34:28,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:34:29,151 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 14 [2022-11-20 09:34:29,152 INFO L350 Elim1Store]: Elim1 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 20 treesize of output 16 [2022-11-20 09:34:29,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1451 backedges. 0 proven. 1451 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:34:29,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146917895] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:34:29,329 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:34:29,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 70 [2022-11-20 09:34:29,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539801525] [2022-11-20 09:34:29,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:34:29,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-11-20 09:34:29,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:34:29,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-11-20 09:34:29,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=4622, Unknown=0, NotChecked=0, Total=4830 [2022-11-20 09:34:29,331 INFO L87 Difference]: Start difference. First operand 152 states and 153 transitions. Second operand has 70 states, 70 states have (on average 3.414285714285714) internal successors, (239), 70 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:33,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:34:33,684 INFO L93 Difference]: Finished difference Result 163 states and 164 transitions. [2022-11-20 09:34:33,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-11-20 09:34:33,685 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 3.414285714285714) internal successors, (239), 70 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2022-11-20 09:34:33,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:34:33,685 INFO L225 Difference]: With dead ends: 163 [2022-11-20 09:34:33,686 INFO L226 Difference]: Without dead ends: 161 [2022-11-20 09:34:33,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 274 SyntacticMatches, 5 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2643 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=517, Invalid=13289, Unknown=0, NotChecked=0, Total=13806 [2022-11-20 09:34:33,687 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 202 mSDsluCounter, 2175 mSDsCounter, 0 mSdLazyCounter, 6277 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 2223 SdHoareTripleChecker+Invalid, 6345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 6277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-20 09:34:33,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 2223 Invalid, 6345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 6277 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-20 09:34:33,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-11-20 09:34:33,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 156. [2022-11-20 09:34:33,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.0129032258064516) internal successors, (157), 155 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:33,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 157 transitions. [2022-11-20 09:34:33,723 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 157 transitions. Word has length 151 [2022-11-20 09:34:33,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:34:33,723 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 157 transitions. [2022-11-20 09:34:33,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 3.414285714285714) internal successors, (239), 70 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:33,723 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 157 transitions. [2022-11-20 09:34:33,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-11-20 09:34:33,724 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:34:33,724 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:34:33,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-11-20 09:34:33,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-11-20 09:34:33,925 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:34:33,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:34:33,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1542884650, now seen corresponding path program 41 times [2022-11-20 09:34:33,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:34:33,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036869849] [2022-11-20 09:34:33,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:34:33,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:34:33,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:34:35,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1533 backedges. 801 proven. 732 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:34:35,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:34:35,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036869849] [2022-11-20 09:34:35,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036869849] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:34:35,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780878783] [2022-11-20 09:34:35,134 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 09:34:35,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:34:35,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:34:35,135 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:34:35,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-11-20 09:34:37,678 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2022-11-20 09:34:37,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:34:37,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-20 09:34:37,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:34:38,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1533 backedges. 882 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:34:38,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:34:39,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1533 backedges. 882 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:34:39,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780878783] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:34:39,725 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:34:39,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 71 [2022-11-20 09:34:39,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647603018] [2022-11-20 09:34:39,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:34:39,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-11-20 09:34:39,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:34:39,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-11-20 09:34:39,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1155, Invalid=3815, Unknown=0, NotChecked=0, Total=4970 [2022-11-20 09:34:39,728 INFO L87 Difference]: Start difference. First operand 156 states and 157 transitions. Second operand has 71 states, 71 states have (on average 3.5211267605633805) internal successors, (250), 71 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:40,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:34:40,474 INFO L93 Difference]: Finished difference Result 261 states and 263 transitions. [2022-11-20 09:34:40,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-20 09:34:40,475 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 3.5211267605633805) internal successors, (250), 71 states have internal predecessors, (250), 0 states have call successors, (0), 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 155 [2022-11-20 09:34:40,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:34:40,475 INFO L225 Difference]: With dead ends: 261 [2022-11-20 09:34:40,475 INFO L226 Difference]: Without dead ends: 169 [2022-11-20 09:34:40,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 242 SyntacticMatches, 44 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4000 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1980, Invalid=6576, Unknown=0, NotChecked=0, Total=8556 [2022-11-20 09:34:40,476 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 459 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 09:34:40,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [459 Valid, 440 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 09:34:40,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-11-20 09:34:40,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 159. [2022-11-20 09:34:40,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.0126582278481013) internal successors, (160), 158 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:40,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 160 transitions. [2022-11-20 09:34:40,526 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 160 transitions. Word has length 155 [2022-11-20 09:34:40,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:34:40,526 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 160 transitions. [2022-11-20 09:34:40,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 3.5211267605633805) internal successors, (250), 71 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:40,526 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 160 transitions. [2022-11-20 09:34:40,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-11-20 09:34:40,527 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:34:40,527 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:34:40,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-11-20 09:34:40,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-11-20 09:34:40,728 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:34:40,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:34:40,728 INFO L85 PathProgramCache]: Analyzing trace with hash 2084175969, now seen corresponding path program 42 times [2022-11-20 09:34:40,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:34:40,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095129418] [2022-11-20 09:34:40,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:34:40,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:34:40,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:34:42,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1597 backedges. 0 proven. 1597 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:34:42,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:34:42,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095129418] [2022-11-20 09:34:42,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095129418] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:34:42,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579556688] [2022-11-20 09:34:42,817 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 09:34:42,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:34:42,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:34:42,820 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:34:42,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-11-20 09:34:47,368 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2022-11-20 09:34:47,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:34:47,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-20 09:34:47,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:34:48,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 09:34:51,999 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-20 09:34:51,999 INFO L350 Elim1Store]: Elim1 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 44 treesize of output 23 [2022-11-20 09:34:52,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1597 backedges. 861 proven. 736 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:34:52,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:34:56,778 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 16 [2022-11-20 09:34:56,781 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 20 [2022-11-20 09:34:57,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1597 backedges. 840 proven. 757 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:34:57,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579556688] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:34:57,938 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:34:57,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 50, 50] total 122 [2022-11-20 09:34:57,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896229776] [2022-11-20 09:34:57,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:34:57,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-11-20 09:34:57,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:34:57,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-11-20 09:34:57,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=13165, Unknown=1, NotChecked=0, Total=14762 [2022-11-20 09:34:57,940 INFO L87 Difference]: Start difference. First operand 159 states and 160 transitions. Second operand has 122 states, 122 states have (on average 3.2950819672131146) internal successors, (402), 122 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:05,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:35:05,377 INFO L93 Difference]: Finished difference Result 254 states and 256 transitions. [2022-11-20 09:35:05,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-11-20 09:35:05,377 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 3.2950819672131146) internal successors, (402), 122 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 158 [2022-11-20 09:35:05,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:35:05,378 INFO L225 Difference]: With dead ends: 254 [2022-11-20 09:35:05,379 INFO L226 Difference]: Without dead ends: 162 [2022-11-20 09:35:05,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 244 SyntacticMatches, 22 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8916 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=3821, Invalid=40488, Unknown=1, NotChecked=0, Total=44310 [2022-11-20 09:35:05,381 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 173 mSDsluCounter, 1471 mSDsCounter, 0 mSdLazyCounter, 1860 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 1522 SdHoareTripleChecker+Invalid, 2749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 853 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 09:35:05,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 1522 Invalid, 2749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1860 Invalid, 0 Unknown, 853 Unchecked, 0.9s Time] [2022-11-20 09:35:05,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-11-20 09:35:05,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2022-11-20 09:35:05,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 1.0124223602484472) internal successors, (163), 161 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:05,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 163 transitions. [2022-11-20 09:35:05,437 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 163 transitions. Word has length 158 [2022-11-20 09:35:05,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:35:05,437 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 163 transitions. [2022-11-20 09:35:05,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 3.2950819672131146) internal successors, (402), 122 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:05,437 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 163 transitions. [2022-11-20 09:35:05,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-11-20 09:35:05,437 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:35:05,438 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 22, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:35:05,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-11-20 09:35:05,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-11-20 09:35:05,638 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:35:05,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:35:05,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1235123466, now seen corresponding path program 43 times [2022-11-20 09:35:05,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:35:05,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514884748] [2022-11-20 09:35:05,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:35:05,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:35:05,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:35:07,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1664 backedges. 0 proven. 1664 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:35:07,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:35:07,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514884748] [2022-11-20 09:35:07,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514884748] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:35:07,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621152178] [2022-11-20 09:35:07,797 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 09:35:07,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:35:07,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:35:07,804 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:35:07,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-11-20 09:35:08,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:35:08,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 105 conjunts are in the unsatisfiable core [2022-11-20 09:35:08,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:35:09,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 09:35:09,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:35:09,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-20 09:35:11,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1664 backedges. 0 proven. 1664 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:35:11,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:35:12,167 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 14 [2022-11-20 09:35:12,169 INFO L350 Elim1Store]: Elim1 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 20 treesize of output 16 [2022-11-20 09:35:12,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1664 backedges. 0 proven. 1664 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:35:12,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621152178] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:35:12,356 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:35:12,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 50] total 99 [2022-11-20 09:35:12,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282838091] [2022-11-20 09:35:12,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:35:12,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-11-20 09:35:12,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:35:12,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-11-20 09:35:12,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=9335, Unknown=0, NotChecked=0, Total=9702 [2022-11-20 09:35:12,358 INFO L87 Difference]: Start difference. First operand 162 states and 163 transitions. Second operand has 99 states, 99 states have (on average 3.292929292929293) internal successors, (326), 99 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:17,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:35:17,144 INFO L93 Difference]: Finished difference Result 171 states and 172 transitions. [2022-11-20 09:35:17,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-11-20 09:35:17,145 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 3.292929292929293) internal successors, (326), 99 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 161 [2022-11-20 09:35:17,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:35:17,146 INFO L225 Difference]: With dead ends: 171 [2022-11-20 09:35:17,146 INFO L226 Difference]: Without dead ends: 169 [2022-11-20 09:35:17,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 269 SyntacticMatches, 4 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4853 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=733, Invalid=20437, Unknown=0, NotChecked=0, Total=21170 [2022-11-20 09:35:17,147 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 327 mSDsluCounter, 2903 mSDsCounter, 0 mSdLazyCounter, 7670 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 2954 SdHoareTripleChecker+Invalid, 7780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 7670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:35:17,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 2954 Invalid, 7780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 7670 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-11-20 09:35:17,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-11-20 09:35:17,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 166. [2022-11-20 09:35:17,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.0121212121212122) internal successors, (167), 165 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:17,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 167 transitions. [2022-11-20 09:35:17,185 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 167 transitions. Word has length 161 [2022-11-20 09:35:17,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:35:17,185 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 167 transitions. [2022-11-20 09:35:17,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 3.292929292929293) internal successors, (326), 99 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:17,186 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 167 transitions. [2022-11-20 09:35:17,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-11-20 09:35:17,186 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:35:17,187 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 23, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:35:17,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-11-20 09:35:17,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-11-20 09:35:17,387 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:35:17,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:35:17,387 INFO L85 PathProgramCache]: Analyzing trace with hash -599898772, now seen corresponding path program 44 times [2022-11-20 09:35:17,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:35:17,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609223805] [2022-11-20 09:35:17,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:35:17,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:35:17,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:35:19,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1750 backedges. 0 proven. 1750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:35:19,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:35:19,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609223805] [2022-11-20 09:35:19,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609223805] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:35:19,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164238654] [2022-11-20 09:35:19,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:35:19,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:35:19,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:35:19,531 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:35:19,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-11-20 09:35:19,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:35:19,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:35:19,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 106 conjunts are in the unsatisfiable core [2022-11-20 09:35:19,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:35:21,236 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2022-11-20 09:35:23,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1750 backedges. 0 proven. 1750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:35:23,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:35:23,854 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 14 [2022-11-20 09:35:23,860 INFO L350 Elim1Store]: Elim1 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 20 treesize of output 16 [2022-11-20 09:35:24,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1750 backedges. 0 proven. 1750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:35:24,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164238654] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:35:24,071 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:35:24,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 50] total 100 [2022-11-20 09:35:24,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679965268] [2022-11-20 09:35:24,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:35:24,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-11-20 09:35:24,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:35:24,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-11-20 09:35:24,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=345, Invalid=9555, Unknown=0, NotChecked=0, Total=9900 [2022-11-20 09:35:24,073 INFO L87 Difference]: Start difference. First operand 166 states and 167 transitions. Second operand has 100 states, 100 states have (on average 3.34) internal successors, (334), 100 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:29,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:35:29,139 INFO L93 Difference]: Finished difference Result 177 states and 178 transitions. [2022-11-20 09:35:29,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-11-20 09:35:29,139 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 3.34) internal successors, (334), 100 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2022-11-20 09:35:29,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:35:29,140 INFO L225 Difference]: With dead ends: 177 [2022-11-20 09:35:29,140 INFO L226 Difference]: Without dead ends: 175 [2022-11-20 09:35:29,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 279 SyntacticMatches, 2 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4947 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=721, Invalid=21331, Unknown=0, NotChecked=0, Total=22052 [2022-11-20 09:35:29,142 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 261 mSDsluCounter, 2945 mSDsCounter, 0 mSdLazyCounter, 8016 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 2998 SdHoareTripleChecker+Invalid, 8102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 8016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-20 09:35:29,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 2998 Invalid, 8102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 8016 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-11-20 09:35:29,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-11-20 09:35:29,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 170. [2022-11-20 09:35:29,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 1.0118343195266273) internal successors, (171), 169 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:29,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 171 transitions. [2022-11-20 09:35:29,196 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 171 transitions. Word has length 165 [2022-11-20 09:35:29,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:35:29,197 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 171 transitions. [2022-11-20 09:35:29,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 3.34) internal successors, (334), 100 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:29,197 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 171 transitions. [2022-11-20 09:35:29,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-11-20 09:35:29,198 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:35:29,198 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:35:29,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-11-20 09:35:29,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2022-11-20 09:35:29,403 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:35:29,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:35:29,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1751702754, now seen corresponding path program 45 times [2022-11-20 09:35:29,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:35:29,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155368258] [2022-11-20 09:35:29,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:35:29,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:35:29,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:35:30,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1840 backedges. 969 proven. 871 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:35:30,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:35:30,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155368258] [2022-11-20 09:35:30,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155368258] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:35:30,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428289879] [2022-11-20 09:35:30,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:35:30,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:35:30,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:35:30,760 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:35:30,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-11-20 09:35:33,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2022-11-20 09:35:33,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:35:33,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-20 09:35:33,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:35:34,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1840 backedges. 1058 proven. 782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:35:34,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:35:35,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1840 backedges. 1058 proven. 782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:35:35,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428289879] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:35:35,838 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:35:35,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 77 [2022-11-20 09:35:35,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583291058] [2022-11-20 09:35:35,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:35:35,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-11-20 09:35:35,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:35:35,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-11-20 09:35:35,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1355, Invalid=4497, Unknown=0, NotChecked=0, Total=5852 [2022-11-20 09:35:35,841 INFO L87 Difference]: Start difference. First operand 170 states and 171 transitions. Second operand has 77 states, 77 states have (on average 3.5324675324675323) internal successors, (272), 77 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:36,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:35:36,689 INFO L93 Difference]: Finished difference Result 283 states and 285 transitions. [2022-11-20 09:35:36,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-20 09:35:36,690 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 3.5324675324675323) internal successors, (272), 77 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 169 [2022-11-20 09:35:36,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:35:36,691 INFO L225 Difference]: With dead ends: 283 [2022-11-20 09:35:36,691 INFO L226 Difference]: Without dead ends: 183 [2022-11-20 09:35:36,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 264 SyntacticMatches, 48 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4725 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2327, Invalid=7773, Unknown=0, NotChecked=0, Total=10100 [2022-11-20 09:35:36,693 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 705 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 705 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 09:35:36,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [705 Valid, 449 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 09:35:36,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-11-20 09:35:36,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 173. [2022-11-20 09:35:36,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.0116279069767442) internal successors, (174), 172 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:36,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 174 transitions. [2022-11-20 09:35:36,752 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 174 transitions. Word has length 169 [2022-11-20 09:35:36,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:35:36,752 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 174 transitions. [2022-11-20 09:35:36,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 3.5324675324675323) internal successors, (272), 77 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:36,753 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 174 transitions. [2022-11-20 09:35:36,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-11-20 09:35:36,753 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:35:36,754 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 24, 24, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:35:36,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-11-20 09:35:36,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:35:36,955 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:35:36,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:35:36,955 INFO L85 PathProgramCache]: Analyzing trace with hash -801023187, now seen corresponding path program 46 times [2022-11-20 09:35:36,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:35:36,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139721951] [2022-11-20 09:35:36,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:35:36,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:35:36,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:35:39,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1910 backedges. 0 proven. 1910 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:35:39,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:35:39,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139721951] [2022-11-20 09:35:39,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139721951] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:35:39,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033532616] [2022-11-20 09:35:39,151 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 09:35:39,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:35:39,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:35:39,152 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:35:39,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-11-20 09:35:39,411 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 09:35:39,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:35:39,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 113 conjunts are in the unsatisfiable core [2022-11-20 09:35:39,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:35:39,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 09:35:41,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1910 backedges. 0 proven. 1910 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:35:41,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:35:41,836 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 14 [2022-11-20 09:35:41,839 INFO L350 Elim1Store]: Elim1 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 20 treesize of output 16 [2022-11-20 09:35:42,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1910 backedges. 0 proven. 1910 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:35:42,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033532616] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:35:42,051 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:35:42,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 79 [2022-11-20 09:35:42,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493754478] [2022-11-20 09:35:42,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:35:42,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-11-20 09:35:42,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:35:42,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-11-20 09:35:42,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=5927, Unknown=0, NotChecked=0, Total=6162 [2022-11-20 09:35:42,054 INFO L87 Difference]: Start difference. First operand 173 states and 174 transitions. Second operand has 79 states, 79 states have (on average 3.4430379746835444) internal successors, (272), 79 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:47,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:35:47,240 INFO L93 Difference]: Finished difference Result 184 states and 185 transitions. [2022-11-20 09:35:47,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-11-20 09:35:47,241 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 3.4430379746835444) internal successors, (272), 79 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 172 [2022-11-20 09:35:47,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:35:47,242 INFO L225 Difference]: With dead ends: 184 [2022-11-20 09:35:47,242 INFO L226 Difference]: Without dead ends: 182 [2022-11-20 09:35:47,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 313 SyntacticMatches, 5 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3339 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=580, Invalid=16976, Unknown=0, NotChecked=0, Total=17556 [2022-11-20 09:35:47,243 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 233 mSDsluCounter, 2525 mSDsCounter, 0 mSdLazyCounter, 7151 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 2579 SdHoareTripleChecker+Invalid, 7227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 7151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-20 09:35:47,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 2579 Invalid, 7227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 7151 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-11-20 09:35:47,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-11-20 09:35:47,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 177. [2022-11-20 09:35:47,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 1.0113636363636365) internal successors, (178), 176 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:47,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 178 transitions. [2022-11-20 09:35:47,292 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 178 transitions. Word has length 172 [2022-11-20 09:35:47,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:35:47,293 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 178 transitions. [2022-11-20 09:35:47,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 3.4430379746835444) internal successors, (272), 79 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:47,293 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 178 transitions. [2022-11-20 09:35:47,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-11-20 09:35:47,294 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:35:47,294 INFO L195 NwaCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:35:47,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-11-20 09:35:47,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:35:47,494 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:35:47,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:35:47,495 INFO L85 PathProgramCache]: Analyzing trace with hash -713479645, now seen corresponding path program 47 times [2022-11-20 09:35:47,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:35:47,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776303433] [2022-11-20 09:35:47,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:35:47,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:35:47,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:35:48,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2004 backedges. 1059 proven. 945 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:35:48,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:35:48,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776303433] [2022-11-20 09:35:48,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776303433] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:35:48,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184167620] [2022-11-20 09:35:48,944 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 09:35:48,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:35:48,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:35:48,945 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:35:48,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-11-20 09:35:50,333 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2022-11-20 09:35:50,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:35:50,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-20 09:35:50,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:35:51,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2004 backedges. 1152 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:35:51,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:35:52,890 INFO L134 CoverageAnalysis]: Checked inductivity of 2004 backedges. 1152 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:35:52,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184167620] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:35:52,891 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:35:52,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 80 [2022-11-20 09:35:52,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305828035] [2022-11-20 09:35:52,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:35:52,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-11-20 09:35:52,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:35:52,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-11-20 09:35:52,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1461, Invalid=4859, Unknown=0, NotChecked=0, Total=6320 [2022-11-20 09:35:52,893 INFO L87 Difference]: Start difference. First operand 177 states and 178 transitions. Second operand has 80 states, 80 states have (on average 3.5375) internal successors, (283), 80 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:53,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:35:53,789 INFO L93 Difference]: Finished difference Result 294 states and 296 transitions. [2022-11-20 09:35:53,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-20 09:35:53,790 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 3.5375) internal successors, (283), 80 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 176 [2022-11-20 09:35:53,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:35:53,791 INFO L225 Difference]: With dead ends: 294 [2022-11-20 09:35:53,791 INFO L226 Difference]: Without dead ends: 190 [2022-11-20 09:35:53,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 275 SyntacticMatches, 50 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5110 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2511, Invalid=8409, Unknown=0, NotChecked=0, Total=10920 [2022-11-20 09:35:53,792 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 531 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 531 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 09:35:53,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [531 Valid, 481 Invalid, 772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 09:35:53,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-11-20 09:35:53,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 180. [2022-11-20 09:35:53,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.011173184357542) internal successors, (181), 179 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:53,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 181 transitions. [2022-11-20 09:35:53,866 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 181 transitions. Word has length 176 [2022-11-20 09:35:53,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:35:53,866 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 181 transitions. [2022-11-20 09:35:53,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 3.5375) internal successors, (283), 80 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:53,867 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 181 transitions. [2022-11-20 09:35:53,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-11-20 09:35:53,867 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:35:53,868 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 25, 25, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:35:53,883 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-11-20 09:35:54,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-11-20 09:35:54,077 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:35:54,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:35:54,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1381035656, now seen corresponding path program 48 times [2022-11-20 09:35:54,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:35:54,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892393047] [2022-11-20 09:35:54,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:35:54,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:35:54,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:35:56,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2077 backedges. 0 proven. 2077 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:35:56,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:35:56,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892393047] [2022-11-20 09:35:56,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892393047] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:35:56,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289851336] [2022-11-20 09:35:56,710 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 09:35:56,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:35:56,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:35:56,711 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:35:56,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-11-20 09:36:06,665 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2022-11-20 09:36:06,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:36:06,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 74 conjunts are in the unsatisfiable core [2022-11-20 09:36:06,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:36:08,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 09:36:09,537 INFO L321 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-11-20 09:36:09,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-11-20 09:36:32,984 INFO L321 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2022-11-20 09:36:32,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 26 [2022-11-20 09:36:33,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2077 backedges. 1128 proven. 949 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:36:33,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:36:39,217 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 16 [2022-11-20 09:36:39,219 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 20 [2022-11-20 09:36:40,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2077 backedges. 1081 proven. 994 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 09:36:40,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289851336] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:36:40,743 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:36:40,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 58, 56] total 141 [2022-11-20 09:36:40,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401124460] [2022-11-20 09:36:40,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:36:40,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 141 states [2022-11-20 09:36:40,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:36:40,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2022-11-20 09:36:40,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2093, Invalid=17631, Unknown=16, NotChecked=0, Total=19740 [2022-11-20 09:36:40,747 INFO L87 Difference]: Start difference. First operand 180 states and 181 transitions. Second operand has 141 states, 141 states have (on average 3.276595744680851) internal successors, (462), 141 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:05,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:37:05,470 INFO L93 Difference]: Finished difference Result 285 states and 288 transitions. [2022-11-20 09:37:05,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-11-20 09:37:05,470 INFO L78 Accepts]: Start accepts. Automaton has has 141 states, 141 states have (on average 3.276595744680851) internal successors, (462), 141 states have internal predecessors, (462), 0 states have call successors, (0), 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 179 [2022-11-20 09:37:05,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:37:05,470 INFO L225 Difference]: With dead ends: 285 [2022-11-20 09:37:05,470 INFO L226 Difference]: Without dead ends: 0 [2022-11-20 09:37:05,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 563 GetRequests, 318 SyntacticMatches, 24 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9841 ImplicationChecksByTransitivity, 56.5s TimeCoverageRelationStatistics Valid=4308, Invalid=45179, Unknown=19, NotChecked=0, Total=49506 [2022-11-20 09:37:05,472 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 74 mSDsluCounter, 1938 mSDsCounter, 0 mSdLazyCounter, 1186 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 1989 SdHoareTripleChecker+Invalid, 1562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 372 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:37:05,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 1989 Invalid, 1562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1186 Invalid, 0 Unknown, 372 Unchecked, 0.5s Time] [2022-11-20 09:37:05,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-20 09:37:05,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-20 09:37:05,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:05,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-20 09:37:05,473 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 179 [2022-11-20 09:37:05,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:37:05,473 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-20 09:37:05,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 141 states, 141 states have (on average 3.276595744680851) internal successors, (462), 141 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:05,474 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-20 09:37:05,474 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-20 09:37:05,476 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-20 09:37:05,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-11-20 09:37:05,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33a46cca-d0f7-43a2-bb09-fd5eb2992019/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-11-20 09:37:05,678 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.